CN103296350A - Artificial electromagnetic material and filter using same - Google Patents
Artificial electromagnetic material and filter using sameDownload PDFInfo
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- CN103296350A CN103296350ACN2012100504269ACN201210050426ACN103296350ACN 103296350 ACN103296350 ACN 103296350ACN 2012100504269 ACN2012100504269 ACN 2012100504269ACN 201210050426 ACN201210050426 ACN 201210050426ACN 103296350 ACN103296350 ACN 103296350A
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及新材料领域，更具体地说，涉及一种具有高介电常数的人工电磁材料以及使用该材料的滤波器。The invention relates to the field of new materials, more specifically, an artificial electromagnetic material with high dielectric constant and a filter using the material.
背景技术Background technique
介电常数是材料对电场响应的一个参数，材料在外加电场时会产生感应电荷而削弱电场，原真空中的外加电场与最终材料中电场的比值即为介电常数。The dielectric constant is a parameter of the response of the material to the electric field. When the material is applied with an electric field, it will generate induced charges and weaken the electric field. The ratio of the applied electric field in the original vacuum to the electric field in the final material is the dielectric constant.
自然界中，任何一种材料在特定的条件下，都有它特定的介电常数值或者介电常数曲线。介电常数较高的材料放在电场中，电场的强度会在电介质材料内有可观的下降。在高介电常数材料中，电磁波波长很短，可以大大缩小射频及微波器件的尺寸。In nature, any material has its specific dielectric constant value or dielectric constant curve under certain conditions. When a material with a higher dielectric constant is placed in an electric field, the strength of the electric field will drop considerably within the dielectric material. In high dielectric constant materials, the wavelength of electromagnetic waves is very short, which can greatly reduce the size of radio frequency and microwave devices.
随着技术日新月异的发展，人们对材料的应用要求越来越高，在某些场合，所需要的介电常数值远高于自然界已有的材料的介电常数值，现有的介电常数较高的介电绝缘体也不能达到要求，这将为技术和产品研发造成瓶颈。因此，人们转向人工制造的人工电磁材料。With the rapid development of technology, people have higher and higher requirements for the application of materials. In some occasions, the required dielectric constant value is much higher than that of the existing materials in nature. The existing dielectric constant Higher dielectric insulators also cannot meet the requirements, which will create a bottleneck for technology and product development. Therefore, people turned to artificially produced artificial electromagnetic materials.
滤波器是无线电技术中的常见器件之一，被广泛应用于通讯、雷达、导航、电子对抗、卫星、测试仪表等电子设备中。滤波器具有谐振腔，滤波器的体积主要取决于谐振腔的个数和容积。而微波谐振腔的谐振频率取决于该腔的容积，一般来说，谐振腔容积越大谐振频率越低，谐振腔容积越小谐振频率越高，因此如何实现在不增大谐振腔尺寸的情况下降低谐振腔的谐振频率对于滤波器的小型化具有重要的意义。Filters are one of the common devices in radio technology, and are widely used in electronic equipment such as communications, radar, navigation, electronic countermeasures, satellites, and test instruments. The filter has a resonant cavity, and the volume of the filter mainly depends on the number and volume of the resonant cavity. The resonant frequency of a microwave resonant cavity depends on the volume of the cavity. Generally speaking, the larger the volume of the resonant cavity, the lower the resonant frequency, and the smaller the volume of the resonant cavity, the higher the resonant frequency. Therefore, how to realize the resonant frequency without increasing the resonant cavity size? Lowering the resonant frequency of the resonant cavity is of great significance for the miniaturization of the filter.
通过在谐振腔内设置具有高介电常数的谐振子，能够在不改变谐振腔的体积的条件下有效降低谐振腔的谐振频率，有利于滤波器的小型化。By arranging a resonant oscillator with a high dielectric constant in the resonant cavity, the resonant frequency of the resonant cavity can be effectively reduced without changing the volume of the resonant cavity, which is beneficial to the miniaturization of the filter.
发明内容Contents of the invention
本发明要解决的技术问题在于，针对现有技术的缺陷，提供一种具有高介电常数人工电磁材料。The technical problem to be solved by the present invention is to provide an artificial electromagnetic material with a high dielectric constant against the defects of the prior art.
本发明解决其技术问题所采用的技术方案是：构造一种人工电磁材料，包括至少一个人工电磁材料片层，每个所述人工电磁材料片层包括基板和附着在所述基板上的至少一个金属片，每个所述金属片上镂空有圆环。The technical solution adopted by the present invention to solve the technical problem is: to construct an artificial electromagnetic material, including at least one artificial electromagnetic material sheet, each of which includes a substrate and at least one sheet attached to the substrate. Metal sheets, each of which is hollowed out with a ring.
在本发明的优选实施方式中，所述金属片有多个，且在所述基板表面上阵列排布。In a preferred embodiment of the present invention, there are multiple metal sheets arranged in an array on the surface of the substrate.
在本发明的优选实施方式中，每个所述金属片上镂空有一个圆环。In a preferred embodiment of the present invention, a circular ring is hollowed out on each of the metal sheets.
在本发明的优选实施方式中，所述金属片为正方形，所述圆环的圆心为所述正方形的中心。In a preferred embodiment of the present invention, the metal sheet is a square, and the center of the ring is the center of the square.
在本发明的优选实施方式中，每个所述金属片上有多个圆环，且所述多个圆环呈周期性排布。In a preferred embodiment of the present invention, there are multiple rings on each metal sheet, and the multiple rings are arranged periodically.
在本发明的优选实施方式中，所述基板为陶瓷材料、FR-4、F4B、树脂基复合材料、铁电材料、铁氧材料或者铁磁材料。In a preferred embodiment of the present invention, the substrate is ceramic material, FR-4, F4B, resin-based composite material, ferroelectric material, ferrite material or ferromagnetic material.
本发明还提供一种滤波器，包括谐振腔和位于谐振腔内部的谐振子，所述谐振子为人工电磁材料，该人工电磁材料包括至少一个人工电磁材料片层，每个所述人工电磁材料片层包括基板和附着在所述基板上的至少一个金属片，每个所述金属片上镂空有圆环。The present invention also provides a filter, which includes a resonant cavity and a resonant oscillator located inside the resonant cavity, the resonant oscillator is an artificial electromagnetic material, and the artificial electromagnetic material includes at least one artificial electromagnetic material sheet, and each artificial electromagnetic material The sheet layer includes a substrate and at least one metal sheet attached to the substrate, each of which is hollowed out with a ring.
在本发明的优选实施方式中，所述金属片有多个，且在所述基板表面上阵列排布。In a preferred embodiment of the present invention, there are multiple metal sheets arranged in an array on the surface of the substrate.
在本发明的优选实施方式中，每个所述金属片上镂空有一个圆环。In a preferred embodiment of the present invention, a circular ring is hollowed out on each of the metal sheets.
在本发明的优选实施方式中，所述金属片为正方形，所述圆环的圆心为所述正方形的中心。In a preferred embodiment of the present invention, the metal sheet is a square, and the center of the ring is the center of the square.
在本发明的优选实施方式中，所述基板为陶瓷材料、FR-4、F4B、树脂基复合材料、铁电材料、铁氧材料或者铁磁材料。In a preferred embodiment of the present invention, the substrate is ceramic material, FR-4, F4B, resin-based composite material, ferroelectric material, ferrite material or ferromagnetic material.
实施本发明具有以下有益效果：通过在人工电磁材料的基板上设置阵列排布的镂空结构，可以使人工电磁材料具有较高的介电常数，将该人工电磁材料应用在滤波器中有利于滤波器的小型化。Implementing the present invention has the following beneficial effects: by setting the hollow structure arranged in an array on the substrate of the artificial electromagnetic material, the artificial electromagnetic material can have a higher dielectric constant, and the application of the artificial electromagnetic material in the filter is beneficial to filtering device miniaturization.
附图说明Description of drawings
下面将结合附图及实施例对本发明作进一步说明，附图中：The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:
图1是本发明实施例的人工电磁材料的结构示意图；Fig. 1 is the structural representation of the artificial electromagnetic material of the embodiment of the present invention;
图2是图1所示的人工电磁材料的材料单元的尺寸标注示意图；Fig. 2 is a schematic diagram of dimensioning of a material unit of the artificial electromagnetic material shown in Fig. 1;
图3是图1所示人工电磁材料的介电常数仿真图；Fig. 3 is a simulation diagram of the dielectric constant of the artificial electromagnetic material shown in Fig. 1;
图4是具有图1所示的人工电磁材料的滤波器的结构剖视图。FIG. 4 is a structural sectional view of a filter having the artificial electromagnetic material shown in FIG. 1 .
具体实施方式Detailed ways
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
本实施例提供一种人工电磁材料如图1所示，包括至少一个人工电磁材料片层，相邻人工电磁材料片层沿垂直于其上下表面的方向可以通过机械连接、焊接或者在相邻的人工电磁材料片层之间填充可连接二者的物质将两者粘合等方式组装成一体。This embodiment provides an artificial electromagnetic material as shown in Figure 1, including at least one artificial electromagnetic material sheet, adjacent artificial electromagnetic material sheets can be mechanically connected, welded or in the direction perpendicular to the upper and lower surfaces of the adjacent artificial electromagnetic material sheet The artificial electromagnetic material sheets are filled with substances that can connect the two, and the two are assembled into a whole by bonding and other methods.
如图1所示，本实施例中人工电磁材料片层包括基板1和附着在基板1上表面的多个金属片2，每个人工电磁材料片层被虚拟地划分为多个阵列排布的材料单元3，如图2所示，每个材料单元3表面的正中间附着有一个金属片2，每个金属片2上镂空有一圆环。本实施例中，每个人材料单元3的尺寸A×A为3mm×3mm，厚度为0.8mm，附着在其上的正方形金属片的尺寸为2.8mm×2.8mm，金属片上镂空的圆环的外径为1mm，内径0.5mm，且圆环的圆心与正方形的中心点共点。As shown in Figure 1, the artificial electromagnetic material sheet in this embodiment includes a substrate 1 and a plurality of
金属片2的材质为铜，当然也可以为其他导电材料；基板1采用介电常数为40的陶瓷材料，当然也可以采用FR-4、F4B、树脂基复合材料、铁电材料、铁氧材料或者铁磁材料等材料。金属片2及其镂空结构通过蚀刻方式实现，也可以采用电镀、钻刻、光刻、电子刻或者离子刻等方式实现。图1所示的人工电磁材料的仿真图如图3所示，由图3可知该人工电磁材料在0～1.5G范围内的介电常数约为205，相对于纯陶瓷材料，该人工电磁材料的介电常数放大了5倍多，而同时该人工电磁材料的电磁损耗相对于陶瓷基板没有明显增加。The
当然，每个金属片3上镂空的圆环可以有多个，例如四个圆环在一金属片3上呈正方形阵列排布且位于金属片3的正中间；也可以有八个，且八个圆环以正方形金属片3的中心为圆心成环形等分排布。进一步地，金属片3不必然为正方形，也可以为矩形、圆形、正六边形等对称结构。Of course, there can be multiple rings hollowed out on each metal sheet 3, for example, four rings are arranged in a square array on a metal sheet 3 and are located in the middle of the metal sheet 3; there can also be eight, and eight The three rings are arranged equally in a ring with the center of the square metal sheet 3 as the center of the circle. Furthermore, the metal sheet 3 is not necessarily a square, and may also be a symmetrical structure such as a rectangle, a circle, or a regular hexagon.
本发明还提供了一种使用上述人工电磁材料的滤波器，该滤波器包括谐振腔4和位于谐振腔4内的谐振子，其中的谐振子采用本实施例中的人工电磁材料。如图4所示，包括接输入和输出信号的端口5，每个端口5分别通过与其电连接的金属盘6相互耦合，谐振子通过支架支撑7在谐振腔内，为了对滤波器的谐振频率进行微调，该滤波器还可设置调谐螺杆。由于本实施例中的人工电磁材料具有较高的介电常数，所以采用该人工电磁材料作为谐振子的滤波器有利于滤波器的小型化。The present invention also provides a filter using the above-mentioned artificial electromagnetic material. The filter includes a resonant cavity 4 and a resonant oscillator located in the resonant cavity 4, wherein the resonant oscillator adopts the artificial electromagnetic material in this embodiment. As shown in Figure 4, it includes
通过改变介质基板中基板的层数、金属微结构的形状和尺寸等方式，可以进一步调整和提高介质基板的介电常数，使其满足特殊场合对高介电常数的需求。By changing the number of layers of the substrate in the dielectric substrate, the shape and size of the metal microstructure, etc., the dielectric constant of the dielectric substrate can be further adjusted and improved to meet the requirements for high dielectric constant in special occasions.
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变形，这些变形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 modifications can be made without departing from the gist of the present invention and the scope of protection of the claims, and these modifications all belong to the protection of the present invention.
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