WO2017166354A1 - 圆极化天线的设计方法、圆极化天线及移动终端 - Google Patents

圆极化天线的设计方法、圆极化天线及移动终端 Download PDF

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Publication number
WO2017166354A1
WO2017166354A1 PCT/CN2016/080609 CN2016080609W WO2017166354A1 WO 2017166354 A1 WO2017166354 A1 WO 2017166354A1 CN 2016080609 W CN2016080609 W CN 2016080609W WO 2017166354 A1 WO2017166354 A1 WO 2017166354A1
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metal
circularly polarized
polarized antenna
mobile terminal
metal frames
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PCT/CN2016/080609
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English (en)
French (fr)
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万明
胡建
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宇龙计算机通信科技(深圳)有限公司
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Publication of WO2017166354A1 publication Critical patent/WO2017166354A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction

Definitions

  • the present invention relates to the field of mobile communications, and in particular to a method for designing a circularly polarized antenna, a circularly polarized antenna, and a mobile terminal.
  • the antenna is an integral part, such as GPS, WLAN or BT.
  • most of the current antennas use linearly polarized PIFA antennas. When used, there is always a polarization mismatch when receiving satellite positioning signals, and the moving performance is not as good as that of circularly polarized antennas.
  • the invention provides a design method of a circularly polarized antenna, a circularly polarized antenna and a mobile terminal, so as to at least solve the prior art, the circularly polarized antenna adopts a separately designed structure, and does not fully utilize the structure of the mobile terminal, resulting in movement.
  • the present invention provides a method for designing a circularly polarized antenna, comprising: taking two corners on the two metal frames on the two metal frames adjacent to the mobile terminal, starting from a corner a frame to separate the intercepted portion from the other metal frame by a non-metallic material, wherein the intercepted length of the two metal frames meets a current distribution with a phase difference of 90 degrees; and the PCB antenna is connected at the starting point The feed point and the short circuit point are such that the two metal frames are used as the two radiating arms of the circularly polarized antenna.
  • the length of the first metal frame of the two metal frames is about 30 mm, and the length of the second metal frame of the two metal frames is about 25 mm.
  • the present invention provides a method for designing a circularly polarized antenna, comprising: providing two metal coatings having intersections on two non-metallic frames adjacent to the mobile terminal, wherein the two segments The metal frame is intercepted to be capable of forming a 90 degree quadrature phase difference; at the intersection, a feed point and a short circuit point connected to the PCB antenna are disposed to make the two-stage metal coating as a circularly polarized antenna Two radiation arms.
  • the length of the first metal frame in the two metal frames is 30 mm, and the length of the second metal frame in the two metal frames is 25 mm.
  • the present invention provides a circularly polarized antenna for a mobile terminal, comprising: designed by the design method of the circularly polarized antenna according to any of the above.
  • the present invention provides a mobile terminal, the mobile terminal comprising a circularly polarized antenna, and the circularly polarized antenna is designed by the following design method:
  • two metal frames are respectively cut on the two metal frames to separate the intercepted portion from the other metal frame by a non-metal material, wherein The intercept length of the two metal frames meets a current distribution with a phase difference of 90 degrees;
  • Feeding points and shorting points connected to the PCB antenna are disposed at the starting point such that the two metal frames are used as the two radiating arms of the circularly polarized antenna.
  • intercept lengths of the two metal frames are different.
  • the length of the first metal frame in the two metal frames is 30 mm, and the length of the second metal frame in the two metal frames is 25 mm.
  • the present invention provides a mobile terminal, the mobile terminal comprising a circularly polarized antenna, and the circularly polarized antenna is designed by the following design method:
  • Two intersecting metal coatings are disposed on two adjacent non-metallic frames of the mobile terminal, wherein the two metal frames are cut to a length to form a 90 degree orthogonal phase difference;
  • a feed point and a short point connected to the PCB antenna are disposed at the intersection such that the two sections of metal coating act as two radiating arms of the circularly polarized antenna.
  • intercept lengths of the two metal frames are different.
  • the length of the first metal frame in the two metal frames is 30 mm, and the length of the second metal frame in the two metal frames is 25 mm.
  • the invention utilizes two metal frames adjacent to the mobile terminal, and respectively intercepts two metal frames on the adjacent two metal frames, and sets a feeding point and a short circuit point at the inflection points of the two metal frames intercepted.
  • the two metal frames are used as the two radiating arms of the circularly polarized antenna, and the circularly polarized antenna is realized by using two metal frames adjacent to the mobile terminal, and the structure of the mobile terminal is fully utilized to solve the circular polarization in the prior art.
  • the antenna is a separately designed structure, and the structure of the mobile terminal is not fully utilized, resulting in a problem that the volume of the mobile terminal is limited.
  • FIG. 1 is a flow chart of a method for designing a circularly polarized antenna according to an embodiment of the present invention
  • FIG. 2 is a flow chart showing another method for designing a circularly polarized antenna according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a metal frame on a side of a mobile terminal according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a finished product on a mobile terminal in actual design according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of current distribution calculation with a phase difference of 90 degrees in an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of the principle of an antenna design in an embodiment of the present invention.
  • the present invention provides a design method of the circularly polarized antenna.
  • Circularly polarized antenna and mobile terminal the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • the embodiment of the invention provides a method for designing a circularly polarized antenna.
  • the flow of the method is as shown in FIG. 1 and includes steps S102 to S104:
  • a feeding point and a shorting point connected to the PCB antenna are set at a starting point, so that the two metal frames are used as two radiating arms of the circularly polarized antenna.
  • the embodiment of the invention utilizes two metal frames adjacent to the mobile terminal, and two metal frames are respectively cut on the adjacent two metal frames, and the feeding point and the short circuit point are set at the inflection points of the two metal frames that are intercepted.
  • the two metal frames are used as the two radiating arms of the circularly polarized antenna, and the circularly polarized antenna is realized by using the two metal frames adjacent to the mobile terminal, and the structure of the mobile terminal is fully utilized to solve the circle in the prior art.
  • the polarized antenna is a separately designed structure, and the structure of the mobile terminal is not fully utilized, resulting in a problem that the volume of the mobile terminal is limited.
  • the length of the two metal frames is different.
  • the length of the first metal frame in the two metal frames is 30 mm
  • the length of the second metal frame in the two metal frames is 25 mm.
  • the embodiment of the present invention further provides a method for designing a circularly polarized antenna.
  • the flow of the method is as shown in FIG. 2, and includes steps S202 to S204:
  • two metal coatings having intersections are disposed on two non-metallic frames adjacent to the mobile terminal, wherein the lengths of the two metal frames are capable of forming a 90 degree orthogonal phase difference;
  • a feeding point and a shorting point connected to the PCB board antenna are disposed at the intersection point, so that the two sections of the metal coating are used as the two radiating arms of the circularly polarized antenna.
  • This embodiment is designed for a mobile terminal with a non-metallic frame.
  • the design idea is the same as the above-mentioned metal frame mobile terminal, and the radiation of the circularly polarized antenna is realized by a part of the metal frame.
  • the length of the two metal frames is different.
  • the length of the first metal frame in the two metal frames is 30 mm, and the length of the second metal frame in the two metal frames is 25 mm.
  • FIG. 3 The structure of the designed metal frame on the side of the mobile terminal is shown in FIG. 3, and the side frame in FIG. 3 is shown in an exaggerated manner, FIG. 4 is In the actual design, the schematic diagram of the finished product on the mobile terminal, the two radiating arms are the two metal frames obtained by the interception.
  • the embodiment of the present invention can obtain the circular polarization day of the mobile terminal by using any of the above design methods.
  • a line, and the circularly polarized antenna can be disposed in the mobile terminal, thereby obtaining a mobile terminal having the circularly polarized antenna.
  • a specific example will be described below.
  • the mobile terminal with circularly polarized antenna provided in this example is designed to make the intercepted two-section metal frame form an orthogonal current distribution with a phase difference of 90 degrees as shown in FIG. 5.
  • FIG. 6 is a schematic diagram of the principle of the antenna design, wherein the two radiating arms are the metal borders of the mobile terminal. As can be seen from the figure, the antenna is located in the corner area, and the vertical radiating arms of the antenna are formed on both sides of the mobile phone (each arm phase is an inverted F antenna, and the antenna feeding point and grounding point are set near the top corner) .
  • a current is formed on the two vertical radiating arms. At this time, by adjusting the length of the radiating arm, the current satisfies a certain phase distribution, and a circularly polarized wave is formed.
  • the antenna Since the antenna has two radiating arms and different lengths, it has a widened bandwidth and achieves multi-band radiation. By carefully adjusting the parameters, the antenna can be radiated in the 2.45G band.
  • the embodiment of the invention designs a circularly polarized, multi-band antenna for the GPS/WLAN/BT part of the metal frame or the non-metallic frame mobile terminal, so that the GPS band is a right circularly polarized antenna, which can improve the navigation of the mobile terminal. Performance; at the same time the antenna has multi-band characteristics, which can be applied to the WLAN band in the implementation example.
  • the mobile terminal provided by the embodiment of the present invention has two small elongated metal frames, so that the occupied space is small; the antenna structure is very simple, but circular polarized radiation and multi-band radiation can be realized, thereby making the mobile terminal
  • the antenna is low in cost and easy to process and manufacture.

Abstract

本发明公开了一种圆极化天线的设计方法、圆极化天线及移动终，其中，该方法包括：在移动终端相邻的两个金属边框上，以拐角为起始点，分别向在两个金属边框上截取两段金属边框，以将截取部分与其他金属边框通过非金属材质分离开，其中，两段金属边框的截取长度满足相位差为90度的电流分布；在起始点处设置与PCB板天线连接的馈电点和短路点，以使两段金属边框作为圆极化天线的两个辐射臂。本发明实施例充分利用移动终端的结构，解决了现有技术中圆极化天线是采用单独设计的结构，没有充分利用移动终端的结构，导致移动终端的体积缩小受限的问题。

Description

圆极化天线的设计方法、圆极化天线及移动终端
本申请要求于2016年3月31日提交中国专利局，申请号为201610196717.7、发明名称为“圆极化天线的设计方法、圆极化天线及移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及移动通讯领域，特别是涉及一种圆极化天线的设计方法、圆极化天线及移动终。
背景技术
在移动终端的内部，天线是不可或缺的一部分，例如GPS、WLAN或BT等。然而，现在的天线大都采用线极化的PIFA天线，其在使用时，接收卫星定位信号时总会存在极化失配，移动性能也没有圆极化天线好。
随着手机、平板电脑等便携式设备的不断发展，有一些移动终端已经配置了圆极化天线，然而，其圆极化天线是采用单独设计的结构，没有充分利用移动终端的结构，导致移动终端的体积缩小受限。
发明内容
本发明提供了一种圆极化天线的设计方法、圆极化天线及移动终，以至少解决现有技术中圆极化天线是采用单独设计的结构，没有充分利用移动终端的结构，导致移动终端的体积缩小受限的问题。
一方面，本发明提供一种圆极化天线的设计方法，包括：在移动终端相邻的两个金属边框上，以拐角为起始点，分别向在所述两个金属边框上截取两段金属边框，以将截取部分与其他金属边框通过非金属材质分离开，其中，所述两段金属边框的截取长度满足相位差为90度的电流分布；在所述起始点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属边框作为圆极化天线的两个辐射臂。
进一步，所述两段金属边框的截取长度不同。
进一步，所述两段金属边框中的第一段金属边框的长度约为30毫米，所述两段金属边框中的第二段金属边框的长度约为25毫米。
一方面，本发明提供一种圆极化天线的设计方法，其特征在于，包括：在移动终端相邻的两个非金属边框上设置两段有交点的金属涂层，其中，所述两段金属边框的截取长度以能够形成90度的正交相位差；在所述交点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属涂层作为圆极化天线的两个辐射臂。
进一步，所述两段金属边框的截取长度不同。
进一步，所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
另一方面，本发明提供一种移动终端的圆极化天线，包括：通过上述任一项所述的圆极化天线的设计方法设计得到。
另一方面，本发明提供一种移动终端，所述移动终端包括圆极化天线，所述圆极化天线通过以下设计方法设计得到：
在移动终端相邻的两个金属边框上，以拐角为起始点，分别向在所述两个金属边框上截取两段金属边框，以将截取部分与其他金属边框通过非金属材质分离开，其中，所述两段金属边框的截取长度满足相位差为90度的电流分布；
在所述起始点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属边框作为圆极化天线的两个辐射臂。
进一步的，所述两段金属边框的截取长度不同。
进一步的，所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
另一方面，本发明提供一种移动终端，所述移动终端包括圆极化天线，所述圆极化天线通过以下设计方法设计得到：
在移动终端相邻的两个非金属边框上设置两段有交点的金属涂层，其中，所述两段金属边框的截取长度以能够形成90度的正交相位差；
在所述交点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属涂层作为圆极化天线的两个辐射臂。
进一步的，所述两段金属边框的截取长度不同。
进一步的，所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
本发明利用了移动终端相邻的两个金属边框，在相邻的两个金属边框上分别截取了两段金属边框，在截取的两段金属边框的拐点处设置馈电点和短路点，来使两段金属边框作为圆极化天线的两个辐射臂，进而利用移动终端相邻的两个金属边框实现了圆极化天线，充分利用移动终端的结构，解决了现有技术中圆极化天线是采用单独设计的结构，没有充分利用移动终端的结构，导致移动终端的体积缩小受限的问题。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是本发明实施例中一种圆极化天线的设计方法的流程图；
图2是本发明实施例中另一种圆极化天线的设计方法的流程图；
图3是本发明实施例中移动终端侧边金属边框的结构示意图；
图4是本发明实施例中实际设计时在移动终端上的成品示意图；
图5是本发明实施例中相位差为90度的电流分布计算示意图；
图6是本发明实施例中天线设计的原理示意图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
为了解决现有技术中圆极化天线是采用单独设计的结构，没有充分利用移动终端的结构，导致移动终端的体积缩小受限的问题，本发明提供了一种圆极化天线的设计方法、圆极化天线及移动终，以下结合附图以及实施例，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，并不限定本发明。
本发明实施例提供一种圆极化天线的设计方法，该方法的流程如图1所示，包括步骤S102至S104：
S102，在移动终端相邻的两个金属边框上，以拐角为起始点，分别向在两个金属边框上截取两段金属边框，以将截取部分与其他金属边框通过非金属材质分离开，其中，两段金属边框的截取长度满足相位差为90度的电流分布；
S104，在起始点处设置与PCB板天线连接的馈电点和短路点，以使两段金属边框作为圆极化天线的两个辐射臂。
本发明实施例利用了移动终端相邻的两个金属边框，在相邻的两个金属边框上分别截取了两段金属边框，在截取的两段金属边框的拐点处设置馈电点和短路点，来使两段金属边框作为圆极化天线的两个辐射臂，进而利用移动终端相邻的两个金属边框实现了圆极化天线，充分利用移动终端的结构，解决了现有技术中圆极化天线是采用单独设计的结构，没有充分利用移动终端的结构，导致移动终端的体积缩小受限的问题。
其中，两段金属边框的截取长度不同，例如，两段金属边框中的第一段金属边框的长度为30毫米，两段金属边框中的第二段金属边框的长度为25毫米。
本发明实施例还提供了一种圆极化天线的设计方法，该方法的流程如图2所示，包括步骤S202至S204：
S202，在移动终端相邻的两个非金属边框上设置两段有交点的金属涂层，其中，两段金属边框的截取长度以能够形成90度的正交相位差；
S204，在交点处设置与PCB板天线连接的馈电点和短路点，以使两段金属涂层作为圆极化天线的两个辐射臂。
本实施例是针对非金属边框的移动终端而设计的，其设计思路与上述金属边框移动终端一样，都是通过一部分金属边框来实现圆极化天线的辐射。在设计时，两段金属边框的截取长度不同，两段金属边框中的第一段金属边框的长度为30毫米，两段金属边框中的第二段金属边框的长度为25毫米。
基于上述任一一种设计，都能够得到圆极化天线，设计后的移动终端侧边金属边框的结构示意如图3所示，图3中侧边框以夸张的方式示出的，图4为在实际设计时，在移动终端上的成品示意图，其中的两个辐射臂就是截取得到的两段金属边框。
本发明实施例利用上述任一设计方法，都可以得到移动终端的圆极化天 线，并且可以将该圆极化天线设置在移动终端中，进而得到具备该圆极化天线的移动终端。为了进一步说明上述设计，下面以具体的实例进行说明。
本实例提供的具备圆极化天线的移动终端在设计时，需要使截取的两段金属边框形成如图5所示的正交的具有相位差为90度的电流分布。
图6为天线设计的原理示意图，其中，两个辐射臂就是移动终端的金属边框。从图中可以看出，天线正好位于边角区域，利用手机的两边形成天线的垂直幅射臂(每个臂相为一个倒F天线，天线馈电的点和接地点设置在顶角附近)。
在馈电点馈电时，会在两个垂直的幅射臂上形成电流，这时通过调节幅射臂的长短，从而使得电流满足一定的相位分布，这样就会形成圆极化波。
由于该天线具备两个幅射臂，而且长短不一，所以具有扩宽带宽，取得多频段幅射的效果。通过仔细调节参数，可以使得天线幅射在2.45G频段
本发明实施例针对金属边框或非金属边框的移动终端的GPS/WLAN/BT部分，设计出了圆极化、多频段天线，使得：GPS频段是右圆极化天线，可以提高移动终端的导航性能；同时该天线具有多频段特性，在实施例子中显示可以应用在WLAN频段。
本发明实施例提供的移动终端，由于天线主体是两个细长的金属边框，从而使得占用空间小；天线结构非常简单，但是能够实现圆极化幅射，以及多频段幅射，从而使得该天线的成本低，易于加工与制造。
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (12)

  1. 一种圆极化天线的设计方法，其特征在于，包括：
    在移动终端相邻的两个金属边框上，以拐角为起始点，分别向在所述两个金属边框上截取两段金属边框，以将截取部分与其他金属边框通过非金属材质分离开，其中，所述两段金属边框的截取长度满足相位差为90度的电流分布；
    在所述起始点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属边框作为圆极化天线的两个辐射臂。
  2. 如权利要求1所述的设计方法，其特征在于，
    所述两段金属边框的截取长度不同。
  3. 如权利要求1或2所述的设计方法，其特征在于，
    所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
  4. 一种圆极化天线的设计方法，其特征在于，包括：
    在移动终端相邻的两个非金属边框上设置两段有交点的金属涂层，其中，所述两段金属边框的截取长度以能够形成90度的正交相位差；
    在所述交点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属涂层作为圆极化天线的两个辐射臂。
  5. 如权利要求4所述的设计方法，其特征在于，
    所述两段金属边框的截取长度不同。
  6. 如权利要求4或5所述的设计方法，其特征在于，
    所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
  7. 一种移动终端，其特征在于，所述移动终端包括圆极化天线，所述圆极化天线通过以下设计方法设计得到：
    在移动终端相邻的两个金属边框上，以拐角为起始点，分别向在所述两个 金属边框上截取两段金属边框，以将截取部分与其他金属边框通过非金属材质分离开，其中，所述两段金属边框的截取长度满足相位差为90度的电流分布；
    在所述起始点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属边框作为圆极化天线的两个辐射臂。
  8. 如权利要求7所述的圆极化天线，其特征在于，
    所述两段金属边框的截取长度不同。
  9. 如权利要求7或8所述的圆极化天线，其特征在于，
    所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
  10. 一种移动终端，其特征在于，所述移动终端包括圆极化天线，所述圆极化天线通过以下设计方法设计得到：
    在移动终端相邻的两个非金属边框上设置两段有交点的金属涂层，其中，所述两段金属边框的截取长度以能够形成90度的正交相位差；
    在所述交点处设置与PCB板天线连接的馈电点和短路点，以使所述两段金属涂层作为圆极化天线的两个辐射臂。
  11. 如权利要求10所述的圆极化天线，其特征在于，
    所述两段金属边框的截取长度不同。
  12. 如权利要求10或11所述的圆极化天线，其特征在于，
    所述两段金属边框中的第一段金属边框的长度为30毫米，所述两段金属边框中的第二段金属边框的长度为25毫米。
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