技术领域technical field
本发明涉及通信领域，更具体地说，涉及一种后馈式卫星电视天线及其卫星电视接收系统。The invention relates to the communication field, and more specifically, relates to a feed-back satellite TV antenna and a satellite TV receiving system thereof.
背景技术Background technique
传统的卫星电视接收系统是由抛物面天线、馈源、高频头、卫星接收机组成的卫星地面接收站。抛物面天线负责将卫星信号反射到位于焦点处的馈源和高频头内。馈源是在抛物面天线的焦点处设置的一个用于收集卫星信号的喇叭，又称波纹喇叭。其主要功能有两个：一是将天线接收的电磁波信号收集起来，变换成信号电压，供给高频头。二是对接收的电磁波进行极化转换。高频头LNB(亦称降频器)是将馈源送来的卫星信号进行降频和信号放大然后传送至卫星接收机。一般可分为C波段频率LNB(3.7GHz-4.2GHz、18-21V)和Ku波段频率LNB(10.7GHz-12.75GHz、12-14V)。LNB的工作流程就是先将卫星高频讯号放大至数十万倍后再利用本地振荡电路将高频讯号转换至中频950MHz-2050MHz，以利于同轴电缆的传输及卫星接收机的解调和工作。卫星接收机是将高频头输送来的卫星信号进行解调，解调出卫星电视图像或数字信号和伴音信号。The traditional satellite TV receiving system is a satellite ground receiving station composed of parabolic antenna, feed source, tuner and satellite receiver. The parabolic dish is responsible for reflecting the satellite signal into the feed and tuner at the focal point. The feed source is a horn set at the focal point of the parabolic antenna to collect satellite signals, also known as a corrugated horn. There are two main functions: one is to collect the electromagnetic wave signal received by the antenna, transform it into a signal voltage, and supply it to the tuner. The second is to perform polarization conversion on the received electromagnetic waves. The high-frequency head LNB (also known as the down-converter) is to down-frequency and amplify the satellite signal sent by the feeder, and then transmit it to the satellite receiver. Generally, it can be divided into C-band frequency LNB (3.7GHz-4.2GHz, 18-21V) and Ku-band frequency LNB (10.7GHz-12.75GHz, 12-14V). The working process of LNB is to first amplify the satellite high-frequency signal to hundreds of thousands of times, and then use the local oscillator circuit to convert the high-frequency signal to an intermediate frequency of 950MHz-2050MHz, so as to facilitate the transmission of the coaxial cable and the demodulation and work of the satellite receiver. . The satellite receiver is to demodulate the satellite signal sent by the tuner, and demodulate the satellite TV image or digital signal and audio signal.
接收卫星信号时，平行的电磁波通过抛物面天线反射后，汇聚到馈源上。通常，抛物面天线对应的馈源是一个喇叭天线。When receiving satellite signals, the parallel electromagnetic waves are reflected by the parabolic antenna and then converged to the feed source. Usually, the corresponding feed source of the parabolic antenna is a horn antenna.
但是由于抛物面天线的反射面的曲面加工难度大，精度要求也高，因此，制造麻烦，且成本较高。However, since the curved surface of the reflective surface of the parabolic antenna is difficult to process and requires high precision, the manufacturing is troublesome and the cost is relatively high.
发明内容Contents of the invention
本发明所要解决的技术问题是，针对现有的卫星电视天线加工不易、成本高的缺陷，提供一种加工简单、制造成本低的后馈式卫星电视天线。The technical problem to be solved by the present invention is to provide a feed-back satellite TV antenna with simple processing and low manufacturing cost for existing satellite TV antennas which are difficult to process and high in cost.
本发明解决其技术问题所采用的技术方案是：一种后馈式卫星电视天线，所述后馈式卫星电视天线包括设置在馈源前方的具有电磁波发散功能的发散元件以及设置在发散元件前方的超材料面板，所述超材料面板包括核心层，所述核心层包括至少一个核心层片层，所述核心层片层包括片状的基材以及设置在基材上的多个人造孔结构，所述核心层片层的折射率呈圆形分布，且相同半径处的折射率相同，随着半径的增大折射率逐渐减小，所述馈源设置在所述超材料面板的中轴线上。The technical solution adopted by the present invention to solve the technical problem is: a feed-back satellite TV antenna, the feed-back satellite TV antenna includes a divergent element with electromagnetic wave divergence function arranged in front of the feed source and a divergent element arranged in front of the divergent element A metamaterial panel, the metamaterial panel includes a core layer, the core layer includes at least one core layer sheet, and the core layer sheet includes a sheet-shaped substrate and a plurality of artificial hole structures arranged on the substrate , the refractive index of the core layer has a circular distribution, and the refractive index at the same radius is the same, and the refractive index gradually decreases with the increase of the radius, and the feed is arranged on the central axis of the metamaterial panel superior.
进一步地，所述核心层包括多个折射率分布相同且相互平行的核心层片层。Further, the core layer includes a plurality of core layer sheets with the same refractive index distribution and parallel to each other.
进一步地，所述超材料面板还包括设置在核心层两侧的匹配层，以实现从空气到核心层的折射率匹配。Further, the metamaterial panel further includes matching layers disposed on both sides of the core layer to achieve refractive index matching from the air to the core layer.
进一步地，所述核心层片层的折射率以其中心为圆心呈圆形分布，所述核心层片层的折射率n(r)分布满足如下公式：Further, the refractive index of the core layer sheet is circularly distributed with its center as the center, and the refractive index n(r) distribution of the core layer sheet satisfies the following formula:
其中，n(r)表示核心层片层上半径为r处的折射率值；Wherein, n(r) represents the refractive index value at the r place on the core layer sheet;
l为馈源到与其靠近的匹配层的距离，或l为馈源到核心层的距离；l is the distance from the feed source to the matching layer close to it, or l is the distance from the feed source to the core layer;
d为核心层的厚度，
R表示最大半径；R means the maximum radius;
nmax表示核心层片层上的折射率最大值；nmax represents the maximum value of the refractive index on the core layer sheet;
nmin表示核心层片层上的折射率最小值。nmin represents the minimum value of the refractive index on the core layer sheet.
进一步地，所述每一匹配层片层具有单一的折射率，核心层两侧的匹配层的多个匹配层片层的折射率均满足以下公式：Further, each matching layer has a single refractive index, and the refractive indices of multiple matching layers of the matching layer on both sides of the core layer satisfy the following formula:
其中，m表示匹配层的总层数，i表示匹配层片层的编号，其中，靠近核心层的匹配层片层的编号为m。Wherein, m represents the total number of layers of the matching layer, and i represents the serial number of the matching layer slice, wherein the serial number of the matching layer slice close to the core layer is m.
进一步地，所述每一匹配层片层包括材料相同的第一基板及第二基板，所述第一基板与第二基板之间填充空气。Further, each matching ply layer includes a first substrate and a second substrate made of the same material, and air is filled between the first substrate and the second substrate.
进一步地，所述核心层的每一核心层片层的多个人造孔结构形状相同，所述多个人造孔结构中填充有折射率大于基材的介质，相同半径处的多个人造孔结构具有相同的体积，且随着半径的增大人造孔结构的体积逐渐减小。Further, the multiple artificial hole structures of each core layer of the core layer have the same shape, the multiple artificial hole structures are filled with a medium with a refractive index greater than that of the substrate, and the multiple artificial hole structures at the same radius It has the same volume, and the volume of the artificial pore structure gradually decreases with the increase of the radius.
进一步地，所述核心层的每一核心层片层的多个人造孔结构形状相同，所述多个人造孔结构中填充有折射率小于基材的介质，相同半径处的多个人造孔结构具有相同的体积，且随着半径的增大人造孔结构的体积逐渐增大。Further, the multiple artificial pore structures of each core layer sheet of the core layer have the same shape, and the multiple artificial pore structures are filled with a medium with a refractive index smaller than that of the substrate, and the multiple artificial pore structures at the same radius It has the same volume, and the volume of the artificial pore structure increases gradually with the increase of the radius.
进一步地，所述发散元件为凹透镜。Further, the diverging element is a concave lens.
进一步地，所述发散元件为发散超材料面板，所述发散超材料面板包括至少一个发散片层，所述发散片层的折射率以其中心为圆心呈圆形分布，且相同半径处的折射率相同，随着半径的增大折射率逐渐增大。Further, the divergent element is a divergent metamaterial panel, and the divergent metamaterial panel includes at least one divergent sheet layer, the refractive index of the divergent sheet layer is distributed in a circle with its center as the center, and the refraction at the same radius The refractive index is the same, and the refractive index increases gradually with the increase of the radius.
根据本发明的后馈式卫星电视天线，由片状的超材料面板代替了传统的抛物面天线，制造加工更加容易，成本更加低廉。并且，超材料面板与馈源之间设置有具有电磁波发散功能的发散元件，这样，在馈源接收电磁波的范围一定的情况下(即超材料面板的接收电磁波辐射的范围一定的情况下)，相较于不加发散元件，馈源与超材料面板之间的距离减小，从而可以大大缩小天线的体积。According to the feed-back satellite TV antenna of the present invention, the traditional parabolic antenna is replaced by a sheet-shaped metamaterial panel, and the manufacturing process is easier and the cost is lower. And, between the metamaterial panel and the feed source, a divergent element with electromagnetic wave divergence function is arranged, so that when the feed source receives electromagnetic waves in a certain range (that is, the metamaterial panel receives electromagnetic wave radiation in a certain range), Compared with no divergent element, the distance between the feed source and the metamaterial panel is reduced, which can greatly reduce the volume of the antenna.
本发明还提供了一种卫星电视接收系统，包括馈源、高频头及卫星接收机，所述卫星电视接收系统还包括上述的后馈式卫星电视天线，所述后馈式卫星电视天线设置在馈源的前方。The present invention also provides a satellite TV receiving system, including a feed source, a tuner and a satellite receiver, the satellite TV receiving system also includes the above-mentioned feed-back satellite TV antenna, and the feed-back satellite TV antenna is set in front of the feed.
附图说明Description of drawings
图1是本发明的后馈式卫星电视天线的结构示意图；Fig. 1 is the structural representation of feed-back type satellite television antenna of the present invention;
图2是本发明一种形式的超材料单元的结构示意图；Fig. 2 is a schematic structural view of a metamaterial unit in a form of the present invention;
图3是本发明的核心层片层的折射率分布示意图；Fig. 3 is a schematic diagram of the refractive index distribution of the core layer sheet of the present invention;
图4是本发明的一种形式的核心层的结构示意图；Fig. 4 is a structural schematic diagram of a core layer of a form of the present invention;
图5是本发明的另一种形式的核心层的结构示意图；Fig. 5 is a structural schematic diagram of another form of the core layer of the present invention;
图6是本发明的匹配层的结构示意图；Fig. 6 is a structural schematic diagram of a matching layer of the present invention;
图7是本发明的发散片层的折射率分布示意图；Fig. 7 is a schematic diagram of the refractive index distribution of the diverging sheet of the present invention;
图8是本发明一种形式的的发散片层的结构示意图；Fig. 8 is a structural schematic diagram of a divergent sheet in one form of the present invention;
图9是图8去掉基材后的正视图；Fig. 9 is a front view after removing the base material in Fig. 8;
图10是具有多个如图8所示的发散片层的发散超材料面板的结构示意图；Fig. 10 is a structural schematic diagram of a divergent metamaterial panel having a plurality of divergent sheets as shown in Fig. 8;
图11是本发明另一种形式的发散片层的结构示意图；Fig. 11 is a schematic structural view of another form of divergent sheet of the present invention;
图12是具有多个如图11所示的发散片层的发散超材料面板的结构示意图。FIG. 12 is a schematic structural view of a divergent metamaterial panel with multiple divergent sheets as shown in FIG. 11 .
具体实施方式Detailed ways
如图1至图6所示，根据本发明后馈式卫星电视天线包括设置在馈源1前方的具有电磁波发散功能的发散元件200，以及设置在发散元件200前方的超材料面板100，所述超材料面板100包括核心层10，所述核心层10包括至少一个核心层片层11，所述核心层片层11包括片状的基材13以及设置在基材13上的多个人造孔结构12，所述核心层片层11的折射率以其中心为圆心呈圆形分布，相同半径处的折射率相同，且随着半径的增大折射率逐渐减小。本发明中，馈源1设置在超材料面板的中轴线上，即馈源与核心层片层11的中心的连线与超材料面板的中轴线重合。馈源1与超材料面板100均有支架支撑，图中并未出支架，其不是本发明的核心，采用传统的支撑方式即可。另外馈源优选为喇叭天线。图中的核心层片层11呈方形，当然，也可以是其它形状，例如圆柱形。As shown in Figures 1 to 6, according to the present invention, the feed-back satellite TV antenna includes a diverging element 200 with electromagnetic wave diverging function arranged in front of the feed source 1, and a metamaterial panel 100 arranged in front of the diverging element 200, said The metamaterial panel 100 includes a core layer 10, the core layer 10 includes at least one core layer sheet 11, and the core layer sheet 11 includes a sheet-shaped substrate 13 and a plurality of artificial hole structures arranged on the substrate 13 12. The refractive index of the core layer sheet 11 is distributed circularly with its center as the center, the refractive index at the same radius is the same, and the refractive index gradually decreases with the increase of the radius. In the present invention, the feed source 1 is arranged on the central axis of the metamaterial panel, that is, the line connecting the feed source and the center of the core layer sheet 11 coincides with the central axis of the metamaterial panel. Both the feed source 1 and the metamaterial panel 100 are supported by brackets, and the brackets are not shown in the figure, which is not the core of the present invention, and traditional support methods can be used. In addition, the feed source is preferably a horn antenna. The core layer 11 in the figure is square, of course, it can also be in other shapes, such as cylinder.
如图1至图5所示，所述核心层10包括多个折射率分布相同且相互平行的核心层片层11。多个核心层片层11紧密贴合，相互之间可以通过双面胶粘接，或者通过螺栓等固定连接。另外相邻的两个核心层片层11之间还可以有间隔，间隔中填充空气或其它介质，以改善核心层的性能。每一核心层片层11的基材13可以划分为多个相同的基材单元V，每一个基材单元V上设置有人造孔结构12，每一个基材单元V与其对应的人造孔结构12构成一个超材料单元D，每一核心层片层11在厚度方向上只有一个超材料单元D。每一基材单元V可以是完全相同的方块，可以是立方体，也可是长方体，每一基材单元V的长、宽、高体积不大于入射电磁波波长的五分之一(通常为入射电磁波波长的十分之一)，以使得整个核心层对电磁波具有连续的电场和/或磁场响应。优选情况下，所述基材单元V为边长是入射电磁波波长十分之一的立方体。As shown in FIGS. 1 to 5 , the core layer 10 includes a plurality of core layer sheets 11 with the same refractive index distribution and parallel to each other. A plurality of core layer sheets 11 are closely attached, and can be bonded to each other by double-sided adhesive tape, or fixedly connected by bolts or the like. In addition, there may be a space between two adjacent core layer sheets 11, and the space is filled with air or other medium to improve the performance of the core layer. The substrate 13 of each core layer sheet 11 can be divided into a plurality of identical substrate units V, each substrate unit V is provided with an artificial pore structure 12, and each substrate unit V has a corresponding artificial pore structure 12 A metamaterial unit D is formed, and each core layer sheet 11 has only one metamaterial unit D in the thickness direction. Each substrate unit V can be exactly the same square, can be a cube, also can be a cuboid, the length, width and height of each substrate unit V are not greater than one-fifth of the wavelength of the incident electromagnetic wave (usually the wavelength of the incident electromagnetic wave 1/10th) so that the entire core layer has a continuous electric and/or magnetic field response to electromagnetic waves. Preferably, the substrate unit V is a cube whose side length is one tenth of the wavelength of the incident electromagnetic wave.
已知折射率其中μ为相对磁导率，ε为相对介电常数，μ与ε合称为电磁参数。实验证明，电磁波通过折射率非均匀的介质材料时，会向折射率大的方向偏折(向折射率大的超材料单元偏折)。因此本发明的核心层对电磁波具有汇聚作用，合理设计核心层的折射率分布，可以使得卫星发出的电磁波通过核心层后汇聚到馈源上。在基材的材料以及填充介质的材料选定的情况下，可以通过设计人造孔结构的形状、体积和/或人造孔结构在基材上的排布获得超材料内部的电磁参数分布，从而设计出每一超材料单元的折射率。首先从超材料所需要的效果出发计算出超材料内部的电磁参数空间分布(即每一超材料单元的电磁参数)，根据电磁参数的空间分布来选择每一超材料单元上的人造孔结构的形状、体积(计算机中事先存放有多种人造孔结构数据)，对每一超材料单元的设计可以用穷举法，例如先选定一个具有特定形状的人造孔结构，计算电磁参数，将得到的结果和我们想要的对比，循环多次，一直到找到我们想要的电磁参数为止，若找到了，则完成了人造孔结构的设计参数选择；若没找到，则换一种形状的人造孔结构，重复上面的循环，一直到找到我们想要的电磁参数为止。如果还是未找到，则上述过程也不会停止。也就是说只有找到了我们需要的电磁参数的人造孔结构，程序才会停止。由于这个过程都是由计算机完成的，因此，看似复杂，其实很快就能完成。known refractive index Among them, μ is the relative magnetic permeability, ε is the relative permittivity, and μ and ε are collectively called electromagnetic parameters. Experiments have proved that when electromagnetic waves pass through a dielectric material with a non-uniform refractive index, they will be deflected toward a direction with a large refractive index (towards a metamaterial unit with a large refractive index). Therefore, the core layer of the present invention has a converging effect on electromagnetic waves, and the reasonable design of the refractive index distribution of the core layer can make the electromagnetic waves emitted by the satellite converge on the feed source after passing through the core layer. When the material of the substrate and the material of the filling medium are selected, the electromagnetic parameter distribution inside the metamaterial can be obtained by designing the shape and volume of the artificial pore structure and/or the arrangement of the artificial pore structure on the substrate, so as to design The refractive index of each metamaterial unit is shown. Firstly, the spatial distribution of electromagnetic parameters inside the metamaterial (that is, the electromagnetic parameters of each metamaterial unit) is calculated from the effect required by the metamaterial, and the artificial pore structure on each metamaterial unit is selected according to the spatial distribution of electromagnetic parameters. Shape and volume (multiple artificial pore structure data are stored in the computer in advance), the design of each metamaterial unit can be exhaustive, for example, first select an artificial pore structure with a specific shape, calculate the electromagnetic parameters, and get The result is compared with what we want, and the cycle is repeated several times until the electromagnetic parameters we want are found. If found, the design parameter selection of the artificial hole structure is completed; if not found, another shape of the artificial hole is used. Hole structure, repeat the above cycle until we find the electromagnetic parameters we want. If it is still not found, the above process will not stop. That is to say, the program will stop only when the artificial hole structure with the electromagnetic parameters we need is found. Since this process is completed by a computer, it may seem complicated, but it can be completed very quickly.
本发明中，所述核心层的基材由陶瓷材料、高分子材料、铁电材料、铁氧材料或铁磁材料等制得。高分子材料可选用的有聚四氟乙烯、环氧树脂、F4B复合材料、FR-4复合材料等。例如，聚四氟乙烯的电绝缘性非常好，因此不会对电磁波的电场产生干扰，并且具有优良的化学稳定性、耐腐蚀性，使用寿命长。In the present invention, the base material of the core layer is made of ceramic material, polymer material, ferroelectric material, ferrite material or ferromagnetic material. Polymer materials can be selected from polytetrafluoroethylene, epoxy resin, F4B composite material, FR-4 composite material, etc. For example, polytetrafluoroethylene has very good electrical insulation, so it will not interfere with the electric field of electromagnetic waves, and has excellent chemical stability, corrosion resistance, and long service life.
本发明中，所述人造孔结构可以通过高温烧结、注塑、冲压或数控打孔的方式形成在基材上。当然对于不同材料的基材，人造孔结构的生成方式也会有所不同，例如，当选用陶瓷材料作为基材时，优选采用高温烧结的形式在基材上生成人造孔结构。当选用高分子材料作为基材时，例如聚四氟乙烯、环氧树脂，则优选采用注塑或冲压的形式在基材上生成人造孔结构。In the present invention, the artificial pore structure can be formed on the substrate by high temperature sintering, injection molding, stamping or numerical control drilling. Of course, for substrates of different materials, the ways of generating the artificial pore structure will also be different. For example, when ceramic materials are selected as the substrate, it is preferable to use high-temperature sintering to generate the artificial pore structure on the substrate. When a polymer material is selected as the base material, such as polytetrafluoroethylene or epoxy resin, it is preferable to form an artificial pore structure on the base material by injection molding or stamping.
本发明的所述人造孔结构可以是圆柱孔、圆锥孔、圆台孔、梯形孔或方形孔一种或组合。当然也可以是其它形式的孔。每一超材料单元D上的人造孔结构的形状根据不同的需要，可以相同，也可以不同。当然，为了更加容易加工制造，整个超材料，优选情况下，采用同一种形状的孔。The artificial hole structure of the present invention may be one or a combination of cylindrical holes, conical holes, conical holes, trapezoidal holes or square holes. Of course, other types of holes are also possible. The shape of the artificial hole structure on each metamaterial unit D can be the same or different according to different needs. Of course, for easier processing and manufacturing, the entire metamaterial preferably uses holes of the same shape.
如图1所示，为本发明第一实施例的超材料面板的结构示意图，在本实施例中，所述超材料面板还包括设置在核心层两侧的匹配层20，以实现从空气到核心层10的折射率匹配。我们知道，介质之间的折射率相差越大，则电磁波从一介质入射到另一介质时，反射越大，反射大，意味着能量的损失，这时候就需要折射率的匹配，已知折射率其中μ为相对磁导率，ε为相对介电常数，μ与ε合称为电磁参数。我们知道空气的折射率为1，因此，在设计匹配层时，电磁波入射侧的匹配层这样设计，即靠近空气的一侧的折射率与空气基本相同，靠近核心层的一侧的折射率与其相接的核心层片层折射率基本相同即可；而电磁波出射侧的匹配层设计则相对核心层对称过来即可。这样，就实现了核心层的折射率匹配，减小了反射，即能量损失可以大大的降低，这样电磁波可以传输的更远。As shown in Figure 1, it is a schematic structural diagram of the metamaterial panel of the first embodiment of the present invention. In this embodiment, the metamaterial panel also includes matching layers 20 arranged on both sides of the core layer to realize the transformation from air to The refractive index of the core layer 10 is matched. We know that the greater the difference in refractive index between media, the greater the reflection of electromagnetic waves from one medium to another, and the greater the reflection, it means energy loss. At this time, the matching of refractive index is required. Known refraction Rate Among them, μ is the relative magnetic permeability, ε is the relative permittivity, and μ and ε are collectively called electromagnetic parameters. We know that the refractive index of air is 1. Therefore, when designing the matching layer, the matching layer on the incident side of the electromagnetic wave is designed such that the refractive index of the side close to the air is basically the same as that of the air, and the refractive index of the side close to the core layer is the same as that of the air. The refractive index of the adjacent core layer sheets should be basically the same; and the design of the matching layer on the electromagnetic wave exit side should be symmetrical with respect to the core layer. In this way, the refractive index matching of the core layer is realized, and reflection is reduced, that is, energy loss can be greatly reduced, so that electromagnetic waves can be transmitted farther.
本实施例中，如图1及图3所示，所述核心层片层11的折射率以其中心O为圆心呈圆形分布，所述核心层片层11的折射率n(r)分布满足如下公式：In this embodiment, as shown in Figure 1 and Figure 3, the refractive index of the core layer sheet 11 is distributed circularly with its center O as the center, and the refractive index n(r) distribution of the core layer sheet 11 is Satisfy the following formula:
其中，n(r)表示核心层片层上半径为r处的折射率值；也即核心层片层上半径为r的超材料单元的折射率；此处半径指的是每一基材单元V的中点到核心层片层的中心O(圆心)的距离，此处的基材单元V的中点，指的是基材单元V与中点O同一平面的一表面的中点。Among them, n(r) represents the refractive index value at the radius r on the core layer sheet; that is, the refractive index of the metamaterial unit whose radius is r on the core layer sheet; the radius here refers to each substrate unit The distance from the midpoint of V to the center O (circle center) of the core layer, the midpoint of the substrate unit V here refers to the midpoint of a surface on the same plane as the substrate unit V and the midpoint O.
l为馈源1到与其靠近的匹配层20的距离；l is the distance from the feed source 1 to the matching layer 20 close to it;
d为核心层的厚度，d is the thickness of the core layer,
R表示最大半径；R means the maximum radius;
nmax表示核心层片层11上的折射率最大值；nmax represents the maximum value of the refractive index on the core layer sheet 11;
nmin表示核心层片层11上的折射率最小值；nmin represents the minimum value of the refractive index on the core layer sheet 11;
由公式(1)、公式(2)所确定的核心层10，能够保证卫星发出的电磁波汇聚到馈源上。这个通过计算机模拟仿真，或者利用光学原理可以得到(即利用光程相等计算)。The core layer 10 determined by the formulas (1) and (2) can ensure that the electromagnetic waves emitted by the satellite converge to the feed source. This can be obtained by computer simulation, or by using the principle of optics (that is, using the calculation of equal optical paths).
本实施例中，核心层片层11的厚度是一定的，通常在入射电磁波波长λ的五分之一以下，优选是入射电磁波波长λ的十分之一。这样，在设计时，如果选定了核心层片层11的层数，则核心层的厚度d就已经确定了，因此，对于不同频率的后馈式卫星电视天线(波长不同)，由公式(2)我们知道，通过合理设计(nmax-nmin)的值，就可以得到任意我们想要的频率的后馈式卫星电视天线。例如，C波段和Ku波段。C波段的频率范围是3400MHz～4200MHz。Ku波段的频率10.7～12.75GHz，其中可分为10.7～11.7GHz、11.7～12.2GHz、12.2～12.75GHz等频段。In this embodiment, the thickness of the core layer sheet 11 is constant, usually less than one-fifth of the wavelength λ of the incident electromagnetic wave, preferably one-tenth of the wavelength λ of the incident electromagnetic wave. Like this, when designing, if the number of layers of the core layer sheet 11 is selected, then the thickness d of the core layer has just been determined, therefore, for the feed-back type satellite TV antenna (wavelength is different) of different frequencies, by formula ( 2) We know that by designing the value of (nmax -nmin ) reasonably, we can get a feed-back satellite TV antenna of any desired frequency. For example, C-band and Ku-band. The frequency range of the C-band is 3400MHz ~ 4200MHz. The frequency of the Ku band is 10.7-12.75 GHz, which can be divided into frequency bands such as 10.7-11.7 GHz, 11.7-12.2 GHz, and 12.2-12.75 GHz.
如图1所示，本实施例中，所述匹配层20包括多个匹配层片层21，每一匹配层片层21具有单一的折射率，核心层两侧的匹配层的多个匹配层片层的折射率均满足以下公式：As shown in Figure 1, in this embodiment, the matching layer 20 includes a plurality of matching layer sheets 21, each matching layer sheet 21 has a single refractive index, and the matching layers of the matching layers on both sides of the core layer The refractive index of the sheet all satisfies the following formula:
其中，m表示匹配层的总层数，i表示匹配层片层的编号，其中，靠近核心层的匹配层片层的编号为m。从公式(4)我们可以看出，核心层10一侧的多个匹配层片层的折射率与核心层10一侧的多个匹配层片层的折射率相对核心层对称设置。匹配层的设置(总层数m)与核心层的最大折射率nmax与最小折射率nmin有直接关系；当i＝1时，表示第1层的折射率，由于其要基本等于空气的折射率1，因此，只要nmax与nmin确定，则可以确定总层数m。Wherein, m represents the total number of layers of the matching layer, and i represents the serial number of the matching layer slice, wherein the serial number of the matching layer slice close to the core layer is m. From the formula (4), we can see that the refractive index of the multiple matching layer sheets on the side of the core layer 10 and the refractive index of the multiple matching layer sheets on the side of the core layer 10 are set symmetrically with respect to the core layer. The setting of the matching layer (the total number of layers m) is directly related to the maximum refractive index nmax and the minimum refractive index nmin of the core layer; when i=1, it means the refractive index of the first layer, because it should be basically equal to that of air The refractive index is 1, therefore, as long as nmax and nmin are determined, the total number of layers m can be determined.
匹配层20可以是由自然界中存在的多个具有单一折射率的材料制成，也可是用如图6所示的匹配层，其包括多个匹配层片层21，每一匹配层片层21包括材料相同的第一基板22及第二基板23，所述第一基板21与第二基板22之间填充空气。通过控制空气的体积与匹配层片层21的体积的比例，可以实现折射率从1(空气的折射率)到第一基板的折射率的变化，从而可以合理设计每一匹配层片层的折射率，实现从空气到核心层的折射率匹配。The matching layer 20 can be made of a plurality of materials with a single refractive index existing in nature, or a matching layer as shown in Figure 6, which includes a plurality of matching layer sheets 21, each matching layer sheet 21 It includes a first substrate 22 and a second substrate 23 made of the same material, and air is filled between the first substrate 21 and the second substrate 22 . By controlling the ratio of the volume of the air to the volume of the matching ply layer 21, the change of the refractive index from 1 (refractive index of air) to the refractive index of the first substrate can be realized, so that the refraction of each matching ply layer can be reasonably designed ratio to achieve refractive index matching from the air to the core layer.
图4为一种形式的核心层10，所述核心层的每一核心层片层11的多个人造孔结构12形状相同，为图2中所示的圆柱形孔，且每一圆柱形孔的中轴线穿过相应的基材单元V的中点，所述多个人造孔结构中填充有折射率大于基材13的介质，相同半径处的多个人造孔结构具有相同的体积，随着半径的增大人造孔结构12的体积逐渐减小。由于人造孔结构12中填充有折射率大于基材13的介质，因此人造孔结构体积越大，则填充的介质越多，其对应的折射率越大，因此，通过此方式可以实现核心层片层的折射率分布按公式(1)的分布。Fig. 4 is a kind of core layer 10, and the plurality of man-made hole structures 12 of each core layer sheet 11 of described core layer are identical in shape, are the cylindrical hole shown in Fig. 2, and each cylindrical hole The central axis of , passes through the midpoint of the corresponding substrate unit V, the plurality of artificial pore structures are filled with a medium with a higher refractive index than the substrate 13, and the plurality of artificial pore structures at the same radius have the same volume, as As the radius increases, the volume of the artificial pore structure 12 gradually decreases. Since the artificial pore structure 12 is filled with a medium with a higher refractive index than the substrate 13, the larger the volume of the artificial pore structure, the more medium is filled, and the corresponding refractive index is greater. Therefore, the core layer sheet can be realized in this way. The refractive index distribution of the layer follows the distribution of formula (1).
图5为另一种形式的核心层10，所述核心层的每一核心层片层11的多个人造孔结构12形状相同，所述多个人造孔结构12中填充有折射率小于基材13的介质，相同半径处的多个人造孔结构具有相同的体积，且随着半径的增大人造孔结构的体积逐渐增大。由于人造孔结构12中填充有折射率小于基材的介质，因此人造孔结构体积越大，则填充的介质越多，其对应的折射率反而越小，因此，通过此方式也可以实现核心层片层的折射率分布按公式(1)的分布。Fig. 5 is another form of core layer 10, the multiple artificial hole structures 12 of each core layer sheet 11 of the core layer have the same shape, and the multiple artificial hole structures 12 are filled with In the medium of 13, multiple artificial pore structures at the same radius have the same volume, and the volume of the artificial pore structure increases gradually with the increase of the radius. Since the artificial pore structure 12 is filled with a medium with a lower refractive index than the substrate, the larger the volume of the artificial pore structure, the more medium it fills, and the smaller the corresponding refractive index. Therefore, the core layer can also be realized in this way. The refractive index distribution of the sheet is distributed according to the formula (1).
图4与图5从外观上看完全相同，折射率分布也相同，只是其实现上述折射率分布的方式有所不同(填充介质不同)，图4与图5中的核心层10均为四层的结构，这里只是示意性的，根据不同的需要(不同的入射电磁波)，以及不同的设计需要，可以有不同的层数。Figure 4 and Figure 5 are exactly the same in appearance, and the refractive index distribution is also the same, but the way to achieve the above refractive index distribution is different (the filling medium is different), the core layer 10 in Figure 4 and Figure 5 is four layers The structure is only schematic here, and there may be different numbers of layers according to different needs (different incident electromagnetic waves) and different design needs.
当然，核心层片层11并不限于上述两种形式，例如，每个人造孔结构可以分成若干个体积相同的单元孔，通过每个基材单元V上的单元孔的数量来控制每一超材料单元D上的人造孔结构的体积也可以实现相同的目的。再例如，核心层片层11可以是如下的形式，即，同一核心层片层所有的人造孔结构体积相同，但是其填充的介质的折射率对应于公式(1)。Of course, the core layer sheet 11 is not limited to the above two forms, for example, each artificial hole structure can be divided into several unit holes with the same volume, and the number of unit holes on each substrate unit V is used to control the The volume of the artificial pore structure on the material unit D can also achieve the same purpose. For another example, the core layer 11 may be in the following form, that is, all artificial pore structures in the same core layer have the same volume, but the refractive index of the medium filled therein corresponds to formula (1).
本发明还有第二种实施例，第二实施例与第一实施例的区别在于核心层片层11的折射率n(r)分布公式中的l表示馈源到核心层的距离(第一实施例中l表示馈源到与其靠近的匹配层的距离)。The present invention also has a second embodiment, the difference between the second embodiment and the first embodiment is that l in the distribution formula of the refractive index n (r) of the core layer sheet 11 represents the distance from the feed source to the core layer (the first In the embodiment, l represents the distance from the feed source to the matching layer close to it).
在本发明中，所述发散元件200可以是凹透镜也可是图10或图12所示的发散超材料面板300，所述发散超材料面板300包括至少一个发散片层301，所述发散片层301的折射率如图7所示，所述发散片层301的折射率以其中心O3为圆心呈圆形分布，且相同半径处的折射率相同，随着半径的增大折射率逐渐减小。超材料面板与馈源之间设置的具有电磁波发散功能的发散元件，具有如下效果：即，在馈源接收电磁波的范围一定的情况下(即超材料面板的接收电磁波辐射的范围一定的情况下)，相较于不加发散元件，馈源与超材料面板之间的距离减小，从而可以大大缩小天线的体积。In the present invention, the diverging element 200 can be a concave lens or the diverging metamaterial panel 300 shown in FIG. 10 or FIG. As shown in Figure 7, the refractive index of the diverging sheet 301 is distributed circularly with its center O3 as the center, and the refractive index at the same radius is the same, and the refractive index gradually decreases with the increase of the radius. The divergent element with electromagnetic wave divergence function arranged between the metamaterial panel and the feed source has the following effects: that is, when the range of the feed source receiving electromagnetic waves is certain (that is, the range of receiving electromagnetic wave radiation of the metamaterial panel is certain) ), compared with no divergent element, the distance between the feed source and the metamaterial panel is reduced, which can greatly reduce the size of the antenna.
发散片层301上的折射率分布规律可以为线性变化，即nR＝nmin+KR，K为常数，R为半径(以发散片层301的中心O3为圆心)，nmin为发散片层301上的折射率最小值，也即发散片层301的中心O3处的折射率。另外，发散片层301上的折射率分布规律亦可为平方率变化，即nR＝nmin+KR2；或为立方率变化即nR＝nmin+KR3；或为冥函数变化，即nR＝nmin*KR等。The distribution law of the refractive index on the divergent sheet 301 can be a linear change, that is, nR =nmin +KR, K is a constant, R is the radius (with the center O3 of the divergent sheet 301 as the center), and nmin is the divergent sheet The minimum value of the refractive index on 301 is the refractive index at the center O3 of the diverging sheet 301 . In addition, the refractive index distribution law on the diverging sheet 301 can also be a square rate change, that is, nR =nmin +KR2 ; or a cubic rate change, that is, nR =nmin +KR3 ; or a ghost function change, That is, nR =nmin *KR and so on.
图8是实现图7所示的折射率分布的一种形式的发散片层400，如图8及图9所示，所述发散片层400包括片状的基材401、附着在基材401上的金属微结构402及覆盖金属微结构402的支撑层403，发散片层400可划分为多个相同的第一发散单元404，每一第一发散单元包括一金属微结构402以及其所占据的基材单元405及支撑层单元406，每一发散片层400在厚度方向上只有一个第一发散单元404，每一第一发散单元404可以是完全相同的方块，可以是立方体，也可是长方体，每一第一发散单元404的长、宽、高体积不大于入射电磁波波长的五分之一(通常为入射电磁波波长的十分之一)，以使得整个发散片层对电磁波具有连续的电场和/或磁场响应。优选情况下，所述第一发散单元404为边长是入射电磁波波长十分之一的立方体。Fig. 8 is a kind of divergent sheet layer 400 that realizes the refractive index distribution shown in Fig. 7, as shown in Fig. 8 and Fig. The metal microstructure 402 on the top and the support layer 403 covering the metal microstructure 402, the divergent sheet layer 400 can be divided into a plurality of identical first divergent units 404, and each first divergent unit includes a metal microstructure 402 and its occupied The substrate unit 405 and the supporting layer unit 406, each diverging sheet layer 400 has only one first diverging unit 404 in the thickness direction, each first diverging unit 404 can be exactly the same square, it can be a cube, it can also be a cuboid , the length, width, and height of each first diverging unit 404 are not greater than one-fifth of the wavelength of the incident electromagnetic wave (usually one-tenth of the wavelength of the incident electromagnetic wave), so that the entire diverging sheet has a continuous electric field for the electromagnetic wave and/or magnetic field response. Preferably, the first diverging unit 404 is a cube whose side length is one tenth of the wavelength of the incident electromagnetic wave.
图9所示为图8去掉基材后的正视图，从图9中可以清楚地看出多个金属微结构402的空间排布，以发散片层400中心O3为圆心(此处的O3在最中间的金属微结构的中点上)，相同半径上的金属微结构402具有相同的几何尺寸，并且随着半径的增大金属微结构402的几何尺寸逐渐减小。此处的半径，是指每一金属微结构402的中心到发散片层400中心O3的距离。Fig. 9 shows the front view of Fig. 8 after removing the base material. From Fig. 9, it can be clearly seen that the spatial arrangement of a plurality of metal microstructures 402 is centered on O3 of the diverging sheet 400 (the O3 here is in At the midpoint of the middlemost metal microstructure), the metal microstructures 402 on the same radius have the same geometric size, and the geometric size of the metal microstructures 402 gradually decreases as the radius increases. The radius here refers to the distance from the center of each metal microstructure 402 to the center O3 of the diverging sheet 400 .
所述发散片层400的基材401由陶瓷材料、高分子材料、铁电材料、铁氧材料或铁磁材料等制得。高分子材料可选用的有聚四氟乙烯、环氧树脂、F4B复合材料、FR-4复合材料等。例如，聚四氟乙烯的电绝缘性非常好，因此不会对电磁波的电场产生干扰，并且具有优良的化学稳定性、耐腐蚀性，使用寿命长。The substrate 401 of the divergent sheet layer 400 is made of ceramic material, polymer material, ferroelectric material, ferrite material or ferromagnetic material. Polymer materials can be selected from polytetrafluoroethylene, epoxy resin, F4B composite material, FR-4 composite material, etc. For example, polytetrafluoroethylene has very good electrical insulation, so it will not interfere with the electric field of electromagnetic waves, and has excellent chemical stability, corrosion resistance, and long service life.
所述金属微结构402为铜线或银线等金属线。上述的金属线可以通过蚀刻、电镀、钻刻、光刻、电子刻或离子刻的方法附着在基材上。当然，也可以采用三维的激光加工工艺。所述金属微结构402可以采用如图9所述的平面雪花状的金属微结构。当然也可是平面雪花状的金属微结构的衍生结构。还可以是“工”字形、“十”字形等金属线。The metal microstructure 402 is metal wires such as copper wires or silver wires. The metal wires mentioned above can be attached to the substrate by etching, electroplating, drilling, photolithography, electron etching or ion etching. Of course, three-dimensional laser processing technology can also be used. The metal microstructure 402 may adopt a planar snowflake-shaped metal microstructure as shown in FIG. 9 . Of course, it can also be a derivative structure of a planar snowflake-like metal microstructure. Also can be metal wires such as " I " font, " ten " font.
图10所示为利用多个图8所示的发散片层400所形成的发散超材料面板300。图中有三层，当然根据不同需要，发散超材料面板300可以是由其它层数的发散片层400构成。所述的多个发散片层400紧密贴合，相互之间可以通过双面胶粘接，或者通过螺栓等固定连接。另外，在图10所示的发散超材料面板300的两侧还要以设置如图6所示的匹配层，以实现折射率的匹配，降低电磁波的反射，增强信号接收。FIG. 10 shows a diffuse metamaterial panel 300 formed using a plurality of diffuse sheets 400 shown in FIG. 8 . There are three layers in the figure. Of course, according to different needs, the divergent metamaterial panel 300 can be composed of divergent sheets 400 of other layers. The plurality of divergent sheet layers 400 are closely attached, and can be bonded to each other by double-sided adhesive tape, or fixedly connected by bolts or the like. In addition, matching layers as shown in FIG. 6 should be provided on both sides of the diverging metamaterial panel 300 shown in FIG. 10 to achieve refractive index matching, reduce electromagnetic wave reflection, and enhance signal reception.
图11是实现图7所示的折射率分布的另一种形式的发散片层500，所述发散片层500包括片状的基材501及设置在基材501上的人造孔结构502，发散片层500可划分为多个相同的第二发散单元504，每一第二发散单元504包括一人造孔结构502以及其所占据的基材单元505，每一发散片层500在厚度方向上只有一个第二发散单元504，每一第二发散单元504可以是完全相同的方块，可以是立方体，也可是长方体，每一第二发散单元504的长、宽、高体积不大于入射电磁波波长的五分之一(通常为入射电磁波波长的十分之一)，以使得整个发散片层对电磁波具有连续的电场和/或磁场响应。优选情况下，所述第二发散单元504为边长是入射电磁波波长十分之一的立方体。Fig. 11 is another form of divergent sheet layer 500 that realizes the refractive index distribution shown in Fig. 7. The divergent sheet layer 500 includes a sheet-shaped substrate 501 and an artificial hole structure 502 arranged on the substrate 501. The sheet layer 500 can be divided into a plurality of identical second diverging units 504, each second diverging unit 504 includes an artificial pore structure 502 and a substrate unit 505 occupied by it, each diverging sheet layer 500 has only A second diverging unit 504, each second diverging unit 504 can be exactly the same block, can be a cube, also can be a cuboid, the length, width and height of each second diverging unit 504 are not greater than five times the wavelength of the incident electromagnetic wave One-tenth of the wavelength of the incident electromagnetic wave (usually one-tenth of the wavelength of the incident electromagnetic wave), so that the entire diverging sheet has a continuous electric and/or magnetic field response to the electromagnetic wave. Preferably, the second diverging unit 504 is a cube whose side length is one tenth of the wavelength of the incident electromagnetic wave.
如图11所示，所述发散片层500上的人造孔结构均为圆柱孔，以发散片层500中心O3为圆心(此处的O3在最中间的人造孔结构的中轴线上)，相同半径上的人造孔结构502具有相同的体积，并且随着半径的增大人造孔结构402的体积逐渐减小。此处的半径，是指每一人造孔结构502的中心轴线到发散片层500最中间的人造孔结构的中轴线的垂直距离。因此，当每一圆柱孔中填充折射率小于基材的介质材料(例如空气)，即可实现图7所示的折射率分布。当然，如果以发散片层500中心O3为圆心，相同半径上的人造孔结构502具有相同的体积，并且随着半径的增大人造孔结构402的体积逐渐增大，则需要在每一圆柱孔中填充折射率大于基材的介质材料，才能实现图7所示的折射率分布。As shown in Figure 11, the artificial hole structures on the diverging sheet 500 are all cylindrical holes, with the center O3 of the diverging sheet 500 as the center (the O3 here is on the central axis of the most middle artificial hole structure), the same The artificial pore structure 502 on the radius has the same volume, and the volume of the artificial pore structure 402 gradually decreases as the radius increases. The radius here refers to the vertical distance from the central axis of each artificial pore structure 502 to the central axis of the man-made pore structure in the middle of the diverging sheet 500 . Therefore, when each cylindrical hole is filled with a dielectric material (such as air) with a lower refractive index than the substrate, the refractive index distribution shown in FIG. 7 can be realized. Of course, if the center O3 of the diverging sheet 500 is the center, the artificial hole structure 502 on the same radius has the same volume, and the volume of the artificial hole structure 402 gradually increases with the increase of the radius, then it is necessary to The refractive index distribution shown in Figure 7 can only be achieved by filling the medium with a dielectric material with a higher refractive index than the substrate.
当然，发散片层并不限于上述此种形式，例如，每个人造孔结构可以分成若干个体积相同的单元孔，通过每个基材单元上的单元孔的数量来控制每一第二发散单元上的人造孔结构的体积也可以实现相同的目的。再例如，发散片层还可以是如下的形式，即，同一发散片层所有的人造孔结构体积相同，但是其填充的介质的折射率满足图7所示的分布，即相同半径上填充的介质材料折射率相同，并且随着半径的增大填充的介质材料折射率逐渐减小。Of course, the divergent sheet layer is not limited to the above-mentioned form, for example, each artificial hole structure can be divided into several unit holes with the same volume, and the number of unit holes on each substrate unit is used to control the number of second divergent units. The volume of the artificial pore structure on it can also achieve the same purpose. For another example, the divergent sheet layer can also be in the following form, that is, all the artificial pore structures of the same divergent sheet layer have the same volume, but the refractive index of the medium it fills satisfies the distribution shown in Figure 7, that is, the filled medium on the same radius The refractive index of the material is the same, and the refractive index of the filled medium material decreases gradually with the increase of the radius.
所述发散片层500的基材501由陶瓷材料、高分子材料、铁电材料、铁氧材料或铁磁材料等制得。高分子材料可选用的有聚四氟乙烯、环氧树脂、F4B复合材料、FR-4复合材料等。例如，聚四氟乙烯的电绝缘性非常好，因此不会对电磁波的电场产生干扰，并且具有优良的化学稳定性、耐腐蚀性，使用寿命长。The base material 501 of the divergent sheet layer 500 is made of ceramic material, polymer material, ferroelectric material, ferrite material or ferromagnetic material. Polymer materials can be selected from polytetrafluoroethylene, epoxy resin, F4B composite material, FR-4 composite material, etc. For example, polytetrafluoroethylene has very good electrical insulation, so it will not interfere with the electric field of electromagnetic waves, and has excellent chemical stability, corrosion resistance, and long service life.
所述人造孔结构502可以通过高温烧结、注塑、冲压或数控打孔的方式形成在基材上。当然对于不同材料的基材，人造孔结构的生成方式也会有所不同，例如，当选用陶瓷材料作为基材时，优选采用高温烧结的形式在基材上生成人造孔结构。当选用高分子材料作为基材时，例如聚四氟乙烯、环氧树脂，则优选采用注塑或冲压的形式在基材上生成人造孔结构。The artificial pore structure 502 can be formed on the substrate by high temperature sintering, injection molding, stamping or numerical control drilling. Of course, for substrates of different materials, the ways of generating the artificial pore structure will also be different. For example, when ceramic materials are selected as the substrate, it is preferable to use high-temperature sintering to generate the artificial pore structure on the substrate. When a polymer material is selected as the base material, such as polytetrafluoroethylene or epoxy resin, it is preferable to form an artificial pore structure on the base material by injection molding or stamping.
上述的人造孔结构502可以是圆柱孔、圆锥孔、圆台孔、梯形孔或方形孔一种或组合。当然也可以是其它形式的孔。每一第二发散单元上的人造孔结构的形状根据不同的需要，可以相同，也可以不同。当然，为了更加容易加工制造，整个超材料，优选情况下，采用同一种形状的孔。The aforementioned artificial hole structure 502 may be one or a combination of cylindrical holes, conical holes, conical holes, trapezoidal holes or square holes. Of course, other types of holes are also possible. The shape of the artificial hole structure on each second diverging unit can be the same or different according to different needs. Of course, for easier processing and manufacturing, the entire metamaterial preferably uses holes of the same shape.
图12所示为利用多个图11所示的发散片层500所形成的发散超材料面板300。图中有三层，当然根据不同需要，发散超材料面板300可以是由其它层数的发散片层500构成。所述的多个发散片层500紧密贴合，相互之间可以通过双面胶粘接，或者通过螺栓等固定连接。另外，在图12所示的发散超材料面板300的两侧还要以设置如图6所示的匹配层，以实现折射率的匹配，降低电磁波的反射，增强信号接收。FIG. 12 shows a diverging metamaterial panel 300 formed using a plurality of diverging sheets 500 shown in FIG. 11 . There are three layers in the figure. Of course, according to different needs, the divergent metamaterial panel 300 can be composed of divergent sheets 500 of other layers. The plurality of diverging sheet layers 500 are closely attached, and can be bonded to each other by double-sided adhesive tape, or fixedly connected by bolts or the like. In addition, matching layers as shown in FIG. 6 should be provided on both sides of the diverging metamaterial panel 300 shown in FIG. 12 to achieve refractive index matching, reduce electromagnetic wave reflection, and enhance signal reception.
另外，本发明还提供本发明还提供了一种卫星电视接收系统，包括馈源、高频头及卫星接收机，所述卫星电视接收系统还包括上述的后馈式卫星电视天线，所述后馈式卫星电视天线设置在馈源的前方。In addition, the present invention also provides a satellite TV receiving system, including a feed source, a tuner and a satellite receiver, and the satellite TV receiving system also includes the above-mentioned feed-back satellite TV antenna, the rear The feeding satellite TV antenna is arranged in front of the feeding source.
馈源、高频头及卫星接收机均为现有的技术，此处不再述说。Feed source, tuner and satellite receiver are all existing technologies, and will not be described here.
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242577.XACN102956979B (en) | 2011-08-23 | 2011-08-23 | A kind of feedback type satellite tv antenna and satellite television receiving system thereof |
| PCT/CN2011/082383WO2013013454A1 (en) | 2011-07-26 | 2011-11-17 | Cassegrain satellite television antenna and satellite television receiver system thereof |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110242577.XACN102956979B (en) | 2011-08-23 | 2011-08-23 | A kind of feedback type satellite tv antenna and satellite television receiving system thereof |
| Publication Number | Publication Date |
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| CN102956979A CN102956979A (en) | 2013-03-06 |
| CN102956979Btrue CN102956979B (en) | 2015-08-05 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201110242577.XAActiveCN102956979B (en) | 2011-07-26 | 2011-08-23 | A kind of feedback type satellite tv antenna and satellite television receiving system thereof |
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| CN (1) | CN102956979B (en) |
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