CN101420063B - Multi-antenna system - Google Patents

Multi-antenna system Download PDF

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Publication number
CN101420063B
CN101420063B CN 200710167909 CN200710167909A CN101420063B CN 101420063 B CN101420063 B CN 101420063B CN 200710167909 CN200710167909 CN 200710167909 CN 200710167909 A CN200710167909 A CN 200710167909A CN 101420063 B CN101420063 B CN 101420063B
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surface
capacitor
multi
antenna system
inductor
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CN 200710167909
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Chinese (zh)
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CN101420063A (en )
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林明达
蔡志鸿
钟世忠
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瑞昱半导体股份有限公司
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Abstract

The invention provides a multiaerial system used for reducing layout limit and element limit, comprising two aerials and an isolation cell. The isolation cell is arranged between the two aerials and comprises an inductance which is a ring formed by coupling and a capacitance; wherein, the inductance and the capacitance are excited for resonance on the resonance frequency which is the same as the operation frequency of the two aerials substantially, so as to increase the isolation of the two aerials.

Description

多天线系统 Multi-antenna system

技术领域 FIELD

[0001] 本发明关于一种多天线系统,特别是一种可以增加天线隔离度的多天线系统。 [0001] The present invention relates to a multi-antenna system, in particular to a multi-antenna system can be increased antenna isolation.

背景技术 Background technique

[0002] 在现今的无线通信系统中,常同时使用多个实质上相同操作频率的天线来传送或接收信号,以在不增加功率或频宽的情况下提高传输效能。 [0002] In today's wireless communication systems, often using multiple antennas substantially the same operating frequency to transmit or receive signals, to improve the transmission performance without increasing the power or bandwidth. 为了达到小型化的目的,这些天线会被紧密设置,从而导致互相干扰。 In order to achieve the purpose of miniaturization, the antennas are closely disposed, thereby causing mutual interference. 因此,如何增加这些天线的隔离度成为一个重要的课题。 Therefore, how to increase the isolation of these antennas become an important issue.

[0003] 然而,传统上增加天线隔离度的方法有许多布局限制。 [0003] However, a method for increasing the antenna isolation many conventional layout constraints. 比如说,若利用狭缝(slit),则只能将狭缝设置在接地面上,且接地面因狭缝所产生的电容及电感并不能以其它的电容及电感来取代,将连带使得元件限制也较多。 For example, when using a slit (Slit), the slit can be disposed on the ground plane, and then ground by capacitors and inductors can not be produced by the slits instead of capacitors and inductors to the other, so that the joint element limit is greater. 除此之外,所产生的电感也由于不容易模型化,亦将难以预估所产生带止(bandstop)效果的频率。 In addition, the inductance is also produced due to easy modeling, it will also be difficult to predict with a stopper (The bandstop) effect generated frequency. 更重要的是由于上述各种布局的限制,传统上增加天线隔离度的方法必将占用较大的面积。 More importantly, due to limitations of the above arrangement, the increased antenna isolation method will occupy large areas traditionally.

发明内容 SUMMARY

[0004] 因此,本发明的目的在于提供一种多天线系统,可以增加天线的隔离度,且减少布局限制及元件限制。 [0004] Accordingly, an object of the present invention to provide a multi-antenna system, the antenna isolation may be increased, and reduces the layout constraints and limitations element.

[0005] 于是,本发明多天线系统包括: [0005] Accordingly, the present invention is a multi-antenna system comprising:

[0006] —介电层,由介电材料制成,包括实质上相互平行的一第一表面及一第二表面; [0006] - a dielectric layer, made of a dielectric material, substantially parallel to each other including a first surface and a second surface;

[0007] —接地面,由导电材料制成,设置在该第一表面上; [0007] - a ground plane made of conductive material disposed on the first surface;

[0008] 二馈送线,由导电材料制成,设置在该第二表面上; [0008] The two feed lines, made of conductive material disposed on the second surface;

[0009] 二辐射元件,设置在该第二表面上,并分别耦接该二馈送线;及 [0009] The second radiation element disposed on the second surface, and are respectively coupled to the two feed lines; and

[0010] 一隔离单元,设置在该二辐射元件之间,包括耦接成环型的一电感及一电容,且该电感或该电容最多一端耦接到该接地面; [0010] an isolation unit disposed between the second radiation element, comprising a ring coupled to an inductor and a capacitor, the inductor and the capacitor or at most one end coupled to the ground plane;

[0011] 其中,该电感及该电容受激发而在与该二辐射元件的操作频率实质上相同的一谐振频率上谐振。 [0011] wherein, the inductor and the capacitor is excited to resonate in the operating frequency of the second radiation element is substantially the same as a resonance frequency.

附图说明 BRIEF DESCRIPTION

[0012] 图I是一组合图,说明本发明多天线系统的一实施例; [0012] Figure I is a composition diagram illustrating a multi-antenna system of the embodiment of the present invention;

[0013] 图2是一分解图,说明图I的实施例; [0013] FIG. 2 is an exploded view of the Figure I embodiment described embodiment;

[0014] 图3是一模拟图,说明图I的实施例及没有一隔离单元时的插入损失; [0014] FIG. 3 is a simulation diagram illustrating the insertion loss of the embodiment of Figure I and is not an isolation unit;

[0015] 图4是一组合图,说明本发明的另一实施例;及 [0015] FIG. 4 is a composition diagram illustrating another embodiment of the present invention; and

[0016] 图5是一模拟图,说明图I的实施例及图4的实施例的插入损失。 [0016] FIG. 5 is a simulation diagram illustrating the insertion loss of the embodiment and the embodiment of FIG. I in FIG. 4.

[0017] 主要元件符号说明 [0017] Main reference numerals DESCRIPTION

[0018] 21介电层 [0018] The dielectric layer 21

[0019] 211 第一表面[0020] 212 第二表面 [0019] The first surface 211 [0020] 212 second surface

[0021] 22接地面 [0021] 22 ground plane

[0022] 23、24 馈送线 [0022] The feed line 23

[0023] 25、26辐射元件 [0023] The radiating element 25, 26

[0024] 27隔离单元 [0024] The isolation unit 27

[0025] 271螺旋电感[0026] 272间隙电容 [0025] The spiral inductor 271 [0026] 272 capacitor gap

[0027] 273连接柱 [0027] Column 273 is connected

[0028] 274连接柱 [0028] The connection post 274

[0029] 275连接线 [0029] 275 cable

[0030] 276连接线 [0030] 276 cable

[0031] 31、32 曲线 [0031] Curve 31

[0032] 51、52 曲线 [0032] Curve 51

具体实施方式 Detailed ways

[0033] 有关本发明的前述及其他技术内容、特点与功效,在以下配合参考附图的二个实施例的详细说明中,将可清楚地呈现。 [0033] For the aforementioned and other technical contents, features and effects of the present invention, the following detailed description with reference to the drawings two embodiments, will be clearly presented.

[0034] 请参阅图I与图2,其示出本发明多天线系统的一实施例,包括一介电层21、一接地面22、二馈送线23、24、二辐射元件25、26及一隔离单元27,以形成二印刷天线。 [0034] Referring to FIGS. I and 2, which shows a multi-antenna system according to an embodiment of the invention, includes a dielectric layer 21, 22, two feed lines 23 and 24, a second radiation element and the ground plane 25, 26 an isolation unit 27 so as to form two printed antenna. 介电层21由介电材料制成,且包括实质上相互平行的第一表面211及第二表面212。 The dielectric layer 21 made of a dielectric material and includes a first surface 211 substantially parallel to one another and the second surface 212. 接地面22由导电材料制成,并印刷在介电层2 I的第一表面211上。 Ground plane 22 made of conductive material, and printed on the first surface 211 of the dielectric layer 2 I. 二馈送线23、24由导电材料制成,并印刷在介电层21的第二表面212上,且与接地面22重叠。 Two feed lines 23, 24 made of conductive material, and printed on the second surface 212 of the dielectric layer 21 and ground plane 22 overlap. 二辐射元件25、26由导电材料制成,并印刷在介电层21的第二表面212上,且与接地面22不重叠,并分别耦接到二馈送线23、24。 Two radiating elements 25, 26 made of conductive material, and printed on the second surface 212 of the dielectric layer 21 and ground plane 22 do not overlap, and are respectively coupled to the two feed lines 23, 24. 在本实施例中,二辐射元件25、26的操作频率实质上相同。 In the present embodiment, the operating frequency of the two radiating elements 25, 26 are substantially the same.

[0035] 隔离单元27由导电材料制成,并设置在介电层21上,且是位于二辐射元件25、26之间。 [0035] The spacer means 27 made of conductive material and disposed on the dielectric layer 21, and is located between the two radiating elements 25,26. 在本实施例中,隔离单元27包括一螺旋电感271、一间隙电容272、二连接柱273、274及二连接线275、276。 In the present embodiment, the isolation unit 27 includes a spiral inductor 271, a capacitor gap 272, two coupling studs 273, 274 and two connecting lines 275, 276. 螺旋电感271、间隙电容272及连接线276印刷在介电层21的第一表面211上,二连接柱273、274贯穿介电层21,而连接线275印刷在介电层21的第二表面212上。 Spiral inductor 271, capacitor 272 and a gap 276 connecting lines printed on the first surface 211 of the dielectric layer 21, two columns 273 and 274 are connected through the dielectric layer 21, and the connecting lines 275 printed on a second surface of the dielectric layer 21 of the 212 on. 螺旋电感271的一端耦接到间隙电容272的一端,且透过连接线276耦接到接地面22,而螺旋电感271的另一端依序透过连接柱273、连接线275及连接柱274耦接到间隙电容272的另一端,因此螺旋电感271及间隙电容272可被视为一环型结构。 One end of the spiral inductor 271 is coupled to one end of the gap of the capacitor 272 and to ground 22 through the connection line 276 is coupled, and the other end of the inductor spiral 271 are connected sequentially through the columns 273, 275 and the connection cable 274 is coupled column gap 272 to the other end of the capacitor, and thus the gap spiral inductor 271 can be considered a capacitor 272 ring structures.

[0036] 螺旋电感271及间隙电容272受二辐射元件25、26的辐射激发而在一与二辐射元件25、26的操作频率实质上相同的谐振频率上谐振,以增加二辐射元件25、26的隔离度。 [0036] The spiral inductor 271 and the second radiation element receiving gap capacitor 272 second radiation element excitation radiation 25, 26 resonate in a frequency of operation of the second radiation element 25, 26 is substantially the same resonant frequency, 25, 26 in order to increase isolation. 如图3所示,曲线31、32分别代表有隔离单元27时及没有隔离单元27时的插入损失(insertion loss)。 3, curves 31 and 32 representing no isolation unit 27 and the insertion loss of 27 (insertion loss) isolation unit.

[0037] 在另一实施例中,隔离单元27也可以不包括连接线276,使得螺旋电感271的二端都没有耦接到接地面22。 [0037] In another embodiment, the isolation unit 27 may not include the connection line 276, so that the spiral inductor ends 271 are not coupled to the ground plane 22. 如图4所示,隔离单元27仍然可以增加二辐射元件25、26的隔离度,只是其频宽会变窄。 4, the isolation unit 27 may be increased still isolation of two radiating elements 25 and 26, except that the bandwidth becomes narrower. 如图5所示,曲线51、52分别代表有连接线276时及没有连接线276时的插入损失。 Shown, the curve 51 and 52 in FIG. 5 represent the insertion loss of connection lines 276 and 276 when the cable is not connected. [0038] 在面积较小的情况下,借由使用螺旋电感271即可获得较大的电感值。 [0038] In the case where a small area, by means of the spiral inductor 271 can be used to obtain a larger inductance value. 除此之外,由于容易模型化,因此也较易预估隔离单元27的谐振频率。 In addition, since it is easy to model, and therefore easier to estimate the resonance frequency of the isolation unit 27.

[0039] 值得注意的是,在上述诸实施例中,螺旋电感271可以替换为其它形状的印刷电感,也可以用集总(lumped)电感来代替。 [0039] It is noted that, in the above embodiments, the spiral inductor 271 may be replaced with a printed inductance other shapes, may be lumped (lumped) inductor in place. 而间隙电容272亦可由其它形状的印刷电容或集总电容来代替。 Capacitor 272 and the gap may be replaced by a printed capacitor or the total capacitance of the set of other shapes. 二辐射元件25、26则可以替换为其它形状的印刷辐射元件,也可以替换为芯片天线(chip antenna)。 Two radiating elements 25, 26 may be replaced with a printed radiating elements of other shapes, may be replaced with a chip antenna (chip antenna). 如此一来,使用元件的限制将因此而变少。 Thus, restrictions on the use of the element therefore decreases. 再者,螺旋电感271及间隙电容272是印刷在介电层21的第一表面211上,但也可以是印刷在介电层21的第二表面212上,且所设置的位置可以根据二辐射元件25、26在各方向上的辐射强度来决定。 Further, the spiral inductor 271 and the capacitance of the gap 272 is printed on the first surface 211 of the dielectric layer 21, but may be a position of the printing on the second surface 21 of the dielectric layer 212, and may be provided according to two radiation elements 25, 26 in each direction of the radiation intensity is determined. 当二辐射元件25、26的辐射强度愈强时,隔离元件27提供的天线隔离效果愈好。 When the radiation intensity of the second radiation elements 25 and 26 stronger, the spacer member 27 to provide better isolation of the antenna.

[0040] 归纳上述,本发明借由在二天线之间设置一包括一电感及一电容的隔离元件,并有一端接地,以达到增加天线隔离度且减少布局限制及元件限制的目的。 [0040] summarized above, by means disposed between the second antenna comprises an inductor and a capacitor of a spacer element, and one end is grounded, to achieve increased antenna isolation and reduces layout restrictive elements and limitations of the present invention.

[0041] 以上所述者,仅为本发明的较佳实施例而已,当不能以此限定本发明实施的范围,即大凡依本发明内容所作的简单的等效变化与修饰,均仍属本发明的范围内。 [0041] The above are merely preferred embodiments of the present invention, only when the simple modifications and equivalent embodiments can thus define the scope of the present invention, i.e., almost all made under this Summary are still present within the scope of the invention. ,

Claims (4)

  1. 1. 一种多天线系统,包括: 一介电层,由介电材料制成,包括实质上相互平行的一第一表面及一第二表面; 一接地面,由导电材料制成,设置在该第一表面上; 二馈送线,由导电材料制成,设置在该第二表面上; 二辐射元件,设置在该第二表面上,并分别耦接该二馈送线'及一隔离单元,设置在该二辐射元件之间,包括耦接成环型的一电感及一电容,且该电感或该电容最多一端耦接到该接地面; 其中,该电感及该电容受激发而在与该二辐射元件的操作频率实质上相同的一谐振频率上谐振。 1. A multi-antenna system, comprising: a dielectric layer made of a dielectric material, substantially parallel to each other including a first surface and a second surface; a ground plane made of conductive material, provided on the first surface; the second feed line made of a conductive material disposed on the second surface; second radiation element disposed on the second surface, and are respectively coupled to the two feed lines', and an isolation unit, disposed between the second radiation element, comprising a ring coupled to an inductor and a capacitor, the inductor and the capacitor or at most one end coupled to the ground plane; wherein the inductor and the capacitor is excited in the operating frequency of the two radiating elements are substantially identical on a resonant frequency.
  2. 2.根据权利要求I所述的多天线系统,其中,该电容及该电感受该二辐射元件的辐射激发。 The multi-antenna system according to claim I, wherein the capacitor and the excitation of the radiation of the electro-competent second radiation element.
  3. 3.根据权利要求2所述的多天线系统,其中,该隔离单元的位置根据该二辐射元件在各方向上的辐射强度来决定。 The multi-antenna system according to claim 2, wherein the position of the isolation unit in the radiation intensity in each direction is determined based on the second radiation element.
  4. 4.根据权利要求I所述的多天线系统,其中,该二辐射元件由导电材料制成,且印刷在该第二表面上,而该电感及该电容设置在该第一表面上。 The multi-antenna system according to claim I, wherein the second radiation element made of conductive material, and printed on the second surface, and the inductor and the capacitor is disposed on the first surface.
CN 200710167909 2007-10-26 2007-10-26 Multi-antenna system CN101420063B (en)

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Publication number Priority date Publication date Assignee Title
CN102157794B (en) * 2010-02-12 2013-08-14 大众电脑股份有限公司 Three-frequency band antenna produced by resonating
CN102918706A (en) * 2010-02-26 2013-02-06 德卡产品有限公司 RFID system with an eddy current trap
CN102104185A (en) * 2010-12-01 2011-06-22 中兴通讯股份有限公司 Multiple input multiple output (MIMO) array antenna
US8922448B2 (en) * 2012-09-26 2014-12-30 Mediatek Singapore Pte. Ltd. Communication device and antennas with high isolation characteristics

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