CN101414706A - Multiband antenna device - Google Patents

Abstract

The invention provides a multiband antenna device, which is applied to a wireless communication device and at least comprises: a first radiating body; a connecting part, one end of which is connected with the first radiation main body and is provided with a feed-in end and a grounding end; one end of the second radiation main body is connected to the other end of the connecting part, and the other end of the second radiation main body extends outwards and bends for multiple times, wherein the extending direction of the second radiation main body is substantially parallel to the extending direction of the connecting part, and the second radiation main body has a longer path length relative to the first radiation main body. The first radiating body realizes the transceiving of wireless signals of a plurality of different first frequency bands, the second radiating body realizes the transceiving of wireless signals of a plurality of different second frequency bands, and the frequency of the first frequency band is relatively higher than that of the second frequency band.

Description

Multiband antenna apparatus

Technical field

The present invention relates to a kind of antenna assembly, particularly a kind of multiband antenna apparatus that is used in radio communication device.

Background technology

In recent years,, make that for example the portable radio communication device of this class such as mobile phone or personal digital assistant becomes the necessity that people live, also brought up living environment easily because wireless communication industry is flourish.Yet in the portable radio communication device of this class, antenna assembly is being played the part of the key player who transmits with the reception wireless signal, so the operating characteristic of antenna assembly has directly influenced the wireless signal transmitting-receiving ability and the quality of radio communication device.

The antenna assembly of general portable radio communication device can be divided into exposed and concealed two kinds haply.Common exposed antenna assembly is helical antenna device (Helical Antenna), the concealed antenna device in present application then with the inverted F type plane antenna device (Planar Inverted-F Antenna, PIFA) comparatively general.The helical antenna device be owing to need expose on the shell of radio communication device, therefore is easier to impairedly, influences communication quality.The inverted F type plane antenna device because have simple structure, volume is little and easily with advantages such as circuit combines, be applied in large quantities in the various radio communication device at present.

Usually, one is designed good antenna assembly except the lower loss of turning back (return loss) will be arranged, and operation frequency range (bandwidth) also is an epochmaking ring.In order to allow the user of radio communication device can more convenient and clearly receive wireless signal, can can't not communicate by letter because of the wireless communication system merchant adopts different signal transmission bandwidths, present radio communication device many by increase antenna assembly quantity or volume make radio communication device can be in bigger frequency range or multiband the transmitting/receiving wireless signal.Yet, assembly volume density day by day improve and the trend of radio communication device miniaturization day by day under, traditional mode can't meet demand.

In order in limited accommodation space, to increase frequency range that antenna assembly can the transmitting/receiving wireless signal, to promote signal transmitting and receiving quality and usefulness, manyly at present realize in the modes that change antenna device arrangement.See also Fig. 1, it is the structural representation of traditional multiband antenna apparatus.As shown in Figure 1, traditionalmultiband antenna apparatus 1 is made of the inverted F type plane antenna device, and thismultiband antenna apparatus 1 has first Department of Radiation 11, second Department of Radiation 12 and parasitic element 13 (parasitic element), and dispose a feed side 14 (feeding point) and first earth terminal 15 (ground), and disposesecond earth terminal 16 at the side ofparasitic element 13 stub areas at the side of second Department of Radiation, 12 stub areas.The stub area of first Department of Radiation 11 is connected with the stub area of second Department of Radiation 12, andparasitic element 13 separates mutually with first Department of Radiation 11 and second Department of Radiation 12, and is adjacent to the subregion of first Department of Radiation 11.Thismultiband antenna apparatus 1 goes for double frequency-band, wherein low-frequency band is global system for mobile communications (Global System for Mobile Communications, GSM) frequency band of 880～960MHz, and high frequency band is broadband CDMA system (Wideband Code Division MultipleAccess, the WCDMA) frequency band about 1920MHz to 2170MHz.

Please consult Fig. 1 again,feed side 14 can be fed intomultiband antenna apparatus 1 with the radiofrequency signal of radio circuit (not icon) desire emission, certainly, also can export radio circuit (not icon) to by the radiofrequency signal thatmultiband antenna apparatus 1 is sensed in feed side 14.First Department of Radiation 11 is "] substantially " font, and first Department of Radiation 11 has long path than second Department of Radiation 12, can in lower band, form resonance mode by this, for example transmitting/receiving wireless signal in the frequency band of global system for mobile communications (GSM) 880～960MHz with the transmitting/receiving wireless signal.Second Department of Radiation 12 be substantially "

" font; and second Department of Radiation 12 is not arranged in the gap of two relative straightways of first Department of Radiation 11 with straightway that first Department of Radiation 11 connects; and second Department of Radiation 12 has short path with respect to first Department of Radiation 11; can form resonance mode with the transmitting/receiving wireless signal in high frequency band with this; transmitting/receiving wireless signal in the frequency band about broadband CDMA system (WCDMA) 1920MHz to 2170MHz for example, andparasitic element 13 is then in order to the frequency range of increase high frequency band.

See also Fig. 2, it is the variation diagram of the standing wave ratio of multiband antenna apparatus shown in Figure 1 to frequency.As shown in Figure 2, the longitudinal axis is standing-wave ratio (the Standing Wave Ratio ofmultiband antenna apparatus 1, SWR) value, itself and the yield value linear relationship each other of the loss (Return Loss) of turning back, and can standing wave ratio be scaled the yield value of turning back and losing by calculating.Standing wave ratio is along with the variation meeting of frequency is different, usually standing wave ratio has good effect at for example frequency band representative antennas device below 3 at this frequency band, therefore as shown in Figure 2,multiband antenna apparatus 1 shown in Figure 1 is applicable to the low-frequency band of global system for mobile communications (GSM) 880～960MHz, and the high frequency band about broadband CDMA system (WCDMA) 1920MHz to 2170MHz.

Except aforesaidtraditional antenna device 1, TaiWan, China patent of invention case, application case number No. 092119341, case name " multifrequency antenna " has also disclosed another kind of antenna device arrangement, make it be applicable to double frequency-band, the low-frequency band and personal communication service (Personal Communication Services, PCS) high frequency band of system that comprise global system for mobile communications (GSM).But, communication environment now is except global system for mobile communications (GSM), also comprise code division multiple access system (CDMA), digital communication system (Digital Communication System, DCS), personal communication service system (PCS) and broadband CDMA system communication systems such as (WCDMA), wherein code division multiple access system (CDMA), digital communication system (DCS), the frequency band of personal communication service system (PCS) and broadband CDMA system (WCDMA) can be respectively 824～880MHz roughly, 1710～1880MHz, 1850～1990MHz and 1920～2170MHz.Because traditional antenna assembly is only applicable to single band or double frequency-band, can't increases frequency band significantly it can be suitable at code division multiple access system (CDMA), global system for mobile communications (GSM), digital communication system (DCS), personal communication service system (PCS) and broadband CDMA system (WCDMA) simultaneously.

Therefore, how to develop and a kind ofly improve above-mentioned known technology disappearance, and go for the multiband antenna apparatus of wide frequency range, real problem for the correlative technology field person solution that presses at present.

Summary of the invention

Main purpose of the present invention is to provide a kind of multiband antenna apparatus, configuration by a plurality of Departments of Radiation be connected, cooperate and share feed side and earth terminal, increase the frequency range of antenna assembly, it can be suitable in code division multiple access system (CDMA), global system for mobile communications (GSM), digital communication system (DCS), personal communication service system (PCS) and Wideband Code Division Multiple Access (WCDMA) (WCDMA) simultaneously.

Another object of the present invention is to provide a kind of multiband antenna apparatus, under the condition that is smaller than system biography antenna assembly volume and size, increase the frequency range of antenna assembly, and make this antenna assembly have higher antenna performance (antenna efficiency) and lower power consumption.

For achieving the above object, a preferred embodiment of the present invention provides a kind of multiband antenna apparatus, is applied to a radio communication device, and this multiband antenna apparatus comprises at least: first radiating principal; Link, the one end is connected in first radiating principal, and has feed side and earth terminal; Second radiating principal, the one end is connected in the other end of link, the other end of second radiating principal then stretches out and bends repeatedly, wherein the bearing of trend of second radiating principal is parallel in fact with the bearing of trend of link, and has long path with respect to first radiating principal; Wherein, first radiating principal is realized the wireless signal transmitting-receiving of a plurality of different first frequency bands, and second radiating principal is realized the wireless signal transmitting-receiving of a plurality of different second frequency bands, and the frequency of first frequency band is relatively higher than the frequency of second frequency band.

As above-mentioned multiband antenna apparatus, described a plurality of these different first frequency bands comprise the frequency band of digital communication system, personal communication service system and broadband CDMA system.

As above-mentioned multiband antenna apparatus, described a plurality of these different second frequency bands comprise the frequency band of code division multiple access system and global system for mobile communications.

As above-mentioned multiband antenna apparatus, this multiband antenna apparatus is disposed on the flexible printed wiring board.

As above-mentioned multiband antenna apparatus, the side of this first radiating principal is not held and is connected in this link, and the shape of this first radiating principal and this link formation is essentially " L " font.

As above-mentioned multiband antenna apparatus, the width of this first radiating principal is in fact greater than the width of this link.

As above-mentioned multiband antenna apparatus, this second radiating principal comprises one first extension edge, one first bending edge, one second extension edge, one second bending edge and one the 3rd extension edge that connects in regular turn.

As above-mentioned multiband antenna apparatus, wherein this first extension edge, this second extension edge and the 3rd extension edge are parallel with this link in fact.

As above-mentioned multiband antenna apparatus, this first bending edge and this second bending edge are vertical with this link in fact.

As above-mentioned multiband antenna apparatus, the width of this second radiating principal is in fact less than the width of this link.

As above-mentioned multiband antenna apparatus, this feed side and this earth terminal are arranged at the zone, stage casing of this link with the hole pattern or are arranged at the side of this link with the guide card pattern.

Therefore, the configuration of multiband antenna apparatus provided by the invention by a plurality of Departments of Radiation be connected, cooperate feed side and the earth terminal shared, increase the frequency range of antenna assembly, it can be suitable at code division multiple access system (CDMA), global system for mobile communications (GSM), digital communication system (DCS), personal communication service system (PCS) and broadband CDMA system (WCDMA) simultaneously.On the other hand, multiband antenna apparatus of the present invention can be under the condition of using less antenna assembly volume and size, increase the frequency range of antenna assembly, and make this antenna assembly have higher antenna performance (antenna efficiency) and lower power consumption.

Description of drawings

Fig. 1 is the structural representation of traditional multiband antenna apparatus.

Fig. 2 is the variation diagram of the standing wave ratio of multiband antenna apparatus shown in Figure 1 to frequency.

Fig. 3 (a) is the structural representation of the multiband antenna apparatus of the preferred embodiment of the present invention.

Fig. 3 (b) is the structural representation of the multiband antenna apparatus of another preferred embodiment of the present invention.

Fig. 4 is that the standing wave ratio of the multiband antenna apparatus of the present invention shown in Fig. 3 (a) and (b) is to the standing wave ratio of the variation of frequency and traditional multiband antenna apparatus shown in Figure 1 comparison diagram to the variation of frequency.

Fig. 5 is that the antenna performance of the multiband antenna apparatus of the present invention shown in Fig. 3 (a) and (b) is to the antenna performance of the variation of frequency and traditional multiband antenna apparatus shown in Figure 1 comparison diagram to the variation of frequency.And each description of reference numerals in the above-mentioned accompanying drawing is as follows:

1: 11: the first Departments of Radiation of multiband antenna apparatus

Department of Radiation 13 in 12: the second: parasitic element

14: 15: the first earth terminals in feed side

Earthterminal 3 in 16: the second: multiband antenna apparatus

31: link 311: feed side

312: 32: the first radiating principals of earth terminal

The side of 321: the first radiating principals is not held 33: the second radiating principals

Second end of 332: the second radiating principals of first end of 331: the second radiating principals

334: the first bending edges of 333: the first extension edges

336: the second bending edges of 335: the second extension edges

337: the three extension edges

Embodiment

Some exemplary embodiments that embody feature of the present invention and advantage will be described in detail in the explanation of back segment.Be understood that the present invention can have various variations on different aspects, it does not depart from the scope of the present invention, and explanation wherein and accompanying drawing ought explain use in itself, rather than is used for limiting the present invention.

See also Fig. 3 (a), it is the structural representation of the multiband antenna apparatus of the preferred embodiment of the present invention.Shown in Fig. 3 (a),multiband antenna apparatus 3 of the present invention compriseslink 31, first radiating principal 32 and second radiating principal 33.Multiband antenna apparatus of thepresent invention 3 is configurable in for example flexible printed wiring board (flexible printed circuit board, FPCB) (not icon), because flexible printed wiring board has pliability, make in the accommodation space of the configurable enclosure interior in radio communication device ofmultiband antenna apparatus 3 whether the wall that is not easy to be subjected to accommodation space has the restriction of curved surface.

Please consult Fig. 3 (a) again,link 31 hasfeed side 311 andearth terminal 312, and whereinfeed side 311 andearth terminal 312 are arranged at the zone, stage casing oflink 31 for the hole pattern.In certain embodiments, shown in Fig. 3 (b),feed side 311 andearth terminal 312 can be arranged at arbitrary side oflink 31 with the guide card pattern, and the width oflink 31 can be but be not limited to 4mm (millimeter).In addition, an end oflink 31 is connected in the side of firstradiating principal 32 and does not hold 321, and firstradiating principal 32 is substantially " L " font with the shape thatlink 31 constitutes, and the other end then is connected infirst end 331 of second radiating principal 33.Therefore,link 31 is sent to first radiating principal 32 and secondradiating principal 33 by two ends respectively with the radiofrequency signal (RF signal) of desire emission, or by first radiatingprincipal 32 and second radiating principal 33 radiofrequency signal that the receives two ends bylink 31 is sent tolink 31.

In the present embodiment, the width of firstradiating principal 32 can be but is not limited to 6mm, and the side of firstradiating principal 32 do not hold 321 to be connected withlink 31, and wherein the width oflink 31 is relatively less than the width of first radiating principal 32.Also relatively less than the width oflink 31, in the present embodiment, the width of secondradiating principal 33 can be but is not limited to 2mm the width of second radiating principal 33.In addition,first end 331 of second radiatingprincipal 33 other end that is connected inlink 31, the secondradiating principals 33 then stretches out.In certain embodiments, the bearing of trend of secondradiating principal 33 is parallel with the bearing of trend oflink 31 in fact.In further embodiments, the other end of second radiatingprincipal 33 also at the outer lateral buckling of bearing of trend repeatedly, makesmultiband antenna apparatus 3 entire area of the present invention diminish except that stretching out.In the present embodiment, after the other end of second radiatingprincipal 33 stretches out and for example bends four times, whole second radiatingprincipal 33 is comprisedfirst extension edge 333 that connects in regular turn by first end, 331 tosecond ends 332,first bending edge 334,second extension edge 335,second bending edge 336 and the3rd extension edge 337,first extension edge 333 wherein,second extension edge 335 and the3rd extension edge 337 are parallel withlink 31 in fact, and mutual spacing can be but is not limited to 2mm, andfirst bending edge 334 andsecond bending edge 336 are vertical withlink 31 in fact.

The radiofrequency signal thatmultiband antenna apparatus 3 of the present invention is launched radio circuit (not icon) desire byfeed side 311 is fed intomultiband antenna apparatus 3, certainly, also can export radio circuit (not icon) to by the radiofrequency signal thatmultiband antenna apparatus 3 is sensed in feed side 311.Firstradiating principal 32 has short path than second radiatingprincipal 33, can in first frequency band (high frequency band), form resonance mode with this with the transmitting/receiving wireless signal, this first frequency band comprises the frequency range of a plurality of different communication systems, digital communication system (DCS) for example, personal communication service system (PCS) and broadband CDMA system (WCDMA), wherein digital communication system (DCS), the frequency band of personal communication service system (PCS) and broadband CDMA system (WCDMA) can be respectively 1710～1880MHz roughly, 1850～1990MHz and 1920～2170MHz.Second radiatingprincipal 33 can form resonance mode with the transmitting/receiving wireless signal in second frequency band (lower band), first radiatingprincipal 32 also can make second frequency band range increase in addition, this second frequency band comprises the frequency range of a plurality of differences than the communication system of low communication frequency, for example the frequency band of global system for mobile communications (GSM) 880～960MHz and code division multiple access system (CDMA) 824～880MHz.

See also Fig. 4, it is that the standing wave ratio of the multiband antenna apparatus of the present invention shown in Fig. 3 (a) and (b) is to the standing wave ratio of the variation of frequency and traditional multiband antenna apparatus shown in Figure 1 comparison diagram to the variation of frequency.As shown in Figure 4, the longitudinal axis is standing-wave ratio (the Standing Wave Ratio of multiband antenna apparatus, SWR) value, itself and the yield value linear relationship each other of the loss (Return Loss) of turning back, and can standing wave ratio be scaled the yield value of turning back and losing via calculating.Standing wave ratio is along with the variation meeting of frequency is different, common standing wave ratio is installed on this frequency band in for example frequency band representative antennas below 3 and has good effect, therefore as shown in Figure 3,traditional antenna device 1 shown in Figure 1 only goes for the frequency band of two kinds of particular communications system, the low-frequency band that comprises global system for mobile communications (GSM) 880～960MHz, and the high frequency band of broadband CDMA system (WCDMA) 1920～2170MHz.Yet,multiband antenna apparatus 3 of the present invention is except the low-frequency band that comprises global system for mobile communications (GSM) 880～960MHz and code division multiple access system (CDMA) 824～880MHz, also increase the frequency range of high frequency band, it can be suitable at digital communication system (DCS), personal communication service system (PCS) and broadband CDMA system (WCDMA) simultaneously.

See also Fig. 5, it is that the antenna performance of the multiband antenna apparatus of the present invention shown in Fig. 3 (a) and (b) is to the antenna performance of the variation of frequency and traditional multiband antenna apparatus shown in Figure 1 comparison diagram to the variation of frequency.As shown in Figure 5, in the low-frequency band of global system for mobile communications (GSM) 880～960MHz and code division multiple access system (CDMA) 824～880MHz, the antenna performance ofmultiband antenna apparatus 3 of the present invention is higher than traditionalmultiband antenna apparatus 1, and in the high frequency band zone, comprise digital communication system (DCS), personal communication service system (PCS) and broadband CDMA system (WCDMA),multiband antenna apparatus 3 the same relatively more traditionalmultiband antenna apparatus 1 of the present invention have higher antenna performance, and have lower power consumption.

Table one be displayed map 3 (a) with (b) shown in multiband antenna apparatus of the present invention and the effect and the rerum natura comparison sheet of traditional multiband antenna apparatus shown in Figure 1.Can find out significantly by table one,multiband antenna apparatus 3 of the present invention has wider frequency range, therefore go for the communication system of more different frequency bands, for example all have good effect in the frequency band of code division multiple access system (CDMA), digital communication system (DCS), personal communication service system (PCS) and broadband CDMA system (WCDMA), this is that 1 of traditional multiband antenna apparatus can't be reached.In addition, aspect the rerum natura comparison, the volume ofmultiband antenna apparatus 3 of the present invention and size are smaller than traditionalmultiband antenna apparatus 1 in fact, therefore can make the volume and the size decreases of radio communication device now, help the radio communication device miniaturization.In addition, the feed side that the tradition multiband antenna apparatus need use one or more at least, and plural earth terminal, yet multiband antenna apparatus of the present invention only need use a feed side of sharing and an earth terminal of sharing, so structure is quite simple.

Table one: the effect of multiband antenna apparatus of the present invention and traditional multiband antenna apparatus and rerum natura comparison sheet

In sum, the invention provides a kind of multiband antenna apparatus, configuration by a plurality of Departments of Radiation be connected, cooperate feed side and the earth terminal shared, increase the frequency range of antenna assembly, it can be suitable at code division multiple access system (CDMA), global system for mobile communications (GSM), digital communication system (DCS), personal communication service system (PCS) and broadband CDMA system (WCDMA) simultaneously.On the other hand, multiband antenna apparatus of the present invention can increase the frequency range of antenna assembly, and make this antenna assembly have higher antenna performance (antennaefficiency) and lower power consumption under the condition of using less antenna assembly volume and size.

The present invention can carry out suitable modification by those of ordinary skills, and it does not all break away from as the claimed scope of attached claims.

Claims (11)

Translated fromChinese

1.一种多频带天线装置，应用于一无线通信装置，该多频带天线装置至少包含：1. A multi-band antenna device, applied to a wireless communication device, the multi-band antenna device at least includes:一第一辐射主体；a first radiation body;一连接部件，其一端连接于该第一辐射主体，且具有一馈入端及一接地端；以及a connection component, one end of which is connected to the first radiating body, and has a feeding end and a grounding end; and一第二辐射主体，其一端连接于该连接部件的另一端，该第二辐射主体的另一端则向外延伸且弯折多次，其中该第二辐射主体的延伸方向与该连接部件的延伸方向实质上平行，且相对于该第一辐射主体具有较长的路径长度；A second radiating body, one end of which is connected to the other end of the connecting part, and the other end of the second radiating body extends outward and bends multiple times, wherein the extending direction of the second radiating body is the same as the extending direction of the connecting part directions are substantially parallel and have a longer path length relative to the first radiating body;其中，该第一辐射主体实现多个不同的第一频带的无线信号收发，该第二辐射主体实现多个不同的第二频带的无线信号收发，该第一频带的频率相对高于该第二频带的频率。Wherein, the first radiating subject realizes the wireless signal transceiving of multiple different first frequency bands, and the second radiating subject realizes the wireless signal transceiving of multiple different second frequency bands, and the frequency of the first frequency band is relatively higher than that of the second frequency band. The frequency of the band.2.如权利要求1所述的多频带天线装置，其中所述多个不同的第一频带包含数字通信系统、个人通信服务系统以及宽带码分多址系统的频带。2. The multi-band antenna device as claimed in claim 1, wherein the plurality of different first frequency bands include frequency bands of a digital communication system, a personal communication service system, and a wideband code division multiple access system.3.如权利要求1所述的多频带天线装置，其中所述多个不同的第二频带包括码分多址系统及全球移动通信系统的频带。3. The multi-band antenna device as claimed in claim 1, wherein the plurality of different second frequency bands include CDMA and GSM frequency bands.4.如权利要求1所述的多频带天线装置，其中该多频带天线装置配置于软性印刷电路板上。4. The multi-band antenna device as claimed in claim 1, wherein the multi-band antenna device is configured on a flexible printed circuit board.5.如权利要求1所述的多频带天线装置，其中该第一辐射主体的侧边未端连接于该连接部件，且该第一辐射主体与该连接部件构成的形状实质上为“L”字型。5. The multi-band antenna device as claimed in claim 1, wherein the side ends of the first radiating body are connected to the connecting part, and the shape formed by the first radiating body and the connecting part is substantially "L" font.6.如权利要求1所述的多频带天线装置，其中该第一辐射主体的宽度实质上大于该连接部件的宽度。6. The multi-band antenna device as claimed in claim 1, wherein a width of the first radiating body is substantially larger than a width of the connecting part.7.如权利要求1所述的多频带天线装置，其中该第二辐射主体包含依序连接的一第一延伸边、一第一弯折边、一第二延伸边、一第二弯折边以及一第三延伸边。7. The multi-band antenna device as claimed in claim 1, wherein the second radiating body comprises a first extended side, a first bent side, a second extended side, and a second bent side connected in sequence and a third extended side.8.如权利要求7所述的多频带天线装置，其中该第一延伸边、该第二延伸边以及该第三延伸边实质上与该连接部件平行。8. The multi-band antenna device as claimed in claim 7, wherein the first extending side, the second extending side and the third extending side are substantially parallel to the connecting part.9.如权利要求7所述的多频带天线装置，其中该第一弯折边及该第二弯折边实质上与该连接部件垂直。9. The multi-band antenna device as claimed in claim 7, wherein the first bent edge and the second bent edge are substantially perpendicular to the connecting member.10.如权利要求1所述的多频带天线装置，其中该第二辐射主体的宽度实质上小于该连接部件的宽度。10. The multi-band antenna device as claimed in claim 1, wherein a width of the second radiating body is substantially smaller than a width of the connecting part.11.如权利要求1所述的多频带天线装置，其中该馈入端及该接地端以孔洞型式设置于该连接部件的中段区域或以导片型式设置于该连接部件的侧边。11 . The multi-band antenna device as claimed in claim 1 , wherein the feed-in terminal and the ground terminal are disposed in the middle region of the connecting member in the form of a hole or disposed in the side of the connecting member in the form of a guide piece.

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