CN101908668A - 宽频天线 - Google Patents
宽频天线 Download PDFInfo
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- CN101908668A CN101908668A CN2009103030525A CN200910303052A CN101908668A CN 101908668 A CN101908668 A CN 101908668A CN 2009103030525 A CN2009103030525 A CN 2009103030525A CN 200910303052 A CN200910303052 A CN 200910303052A CN 101908668 A CN101908668 A CN 101908668A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
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Abstract
一种宽频天线，包括一第一辐射体、一第二辐射体、一连接部及一馈入线，该第一辐射体与第二辐射体通过该连接部相连接；该第一辐射体与第二辐射体面面平行设置，该第一辐射体呈一矩形的框体结构，用于调整所述宽频天线前端的阻抗匹配与应用频宽，该第二辐射体为一对称型结构，包括若干第一辐射臂及若干第二辐射臂，通过辐臂间的相互耦合来增加阻抗频宽。
Description
技术领域
本发明涉及一种天线，尤其涉及一种涵盖多个系统频带的宽频天线。
背景技术
随着无线通信技术、信息处理技术的迅速发展以及人们生活水平的日益提高，移动电话、个人数字助理(personal digital assistant，PDA)等便携式无线通信装置竞相涌现，进入到千家万户，使消费者可随时随地享受到高科技带来的种种便利，使得这些便携式无线通信装置已成为现代人日常生活不可缺少的一部分。
在这些无线通信装置中，用来发射、接收无线电波以传递、交换无线电数据信号的天线装置，无疑是无线通信装置中最重要的组件之一。而近年来各种通信系统及应用的不断出现，也使得天线的需求朝向涵盖多个系统频带的宽频天线设计；同时由于这些无线通信的外观亦趋向于轻薄与微型化，使得天线设计除了宽频之外，亦需具备有小型化的特征，如何使天线尺寸缩小并具有宽频的特性，已成为各家天线厂商最大的挑战。
发明内容
有鉴于此，本发明提供一种体积小，且能涵盖多个系统频宽的宽频天线。
一种宽频天线，包括一第一辐射体、一第二辐射体、一连接部及一馈入线，该第一辐射体与第二辐射体通过该连接部相连接；该第一辐射体与第二辐射体面面平行设置，该第一辐射体呈一矩形的框体结构，用于调整所述宽频天线前端的阻抗匹配与应用频宽，该第二辐射体为一对称型结构，包括若干第一辐射臂及若干第二辐射臂，通过辐臂间的相互耦合来增加阻抗频宽。
相较于现有技术，所述宽频天线采用双调节阻抗匹配的结构来增加工作频宽，辐射效率高，体积小，其宽频范围可涵盖全球定位系统(Global Position system，GPS)，手机系统(DCS/PCS/UMTS)及无线局域网络(Wireless Local Area Networks，WLAN)等通信系统。
附图说明
图1为本发明较佳实施例的宽频天线布设于电路板上的立体图。
图2为图1所示宽频天线的主要尺寸标注图。
图3为图1所示宽频天线的最优化回波损耗图。
图4为图1所示宽频天线的辐射效率图。
具体实施方式
请参阅图1，本发明一个较佳实施例的宽频天线10布设于移动电话、个人数字助理(personal digital assistant，PDA)等便携式无线通信装置(图未示)内的一电路板30一侧，并与该电路板30电性连接，用以发射、接收无线电波以传递、交换无线电数据信号。
该宽频天线10包括一第一辐射体11、一第二辐射体13、一连接部15及一馈入线17。所述第一辐射体13通过馈入线11与所述电路板30连接，该第一辐射体11与第二辐射体13通过连接部15相互连接。
所述第一辐射体11呈一平面矩形框体状，包括一第一长边111、一第二长边113及二短边115。所述第一长边111与所述第二长边113相对设置，所述二短边115相对设置。该第一长边111、第二长边113及二短边115宽度大致相等。通过调节第一长边111、第二长边113及二短边115的长度，来调节所述宽频天线10的阻抗匹配与应用频宽。
所述第二辐射体13为一对称的平面框体结构，其包括一第一侧边131、一第二侧边133、一连接边135。所述第一侧边131及第二侧边133相对设置，其形状大小相同且分别垂直连接于所述连接边135两端。所述连接边135的长度略长于所述第一辐射体11的第一长边111及第二长边113的长度。所述第一侧边131朝向第二侧边133的中部延伸有若干第一辐射臂1311。所述若干第一辐射臂1311从第一侧边131远离所述连接边135的端部开始等间隔平行于连接边135设置。所述第一辐射臂131呈长条状，在本实施例中，其数量为4条。所述第二侧边131朝向第一侧边133等间隔延伸有若干第二辐射臂1331。该第二辐射臂1331与所述第一辐射臂1311形状、数量相同且分别相对间隔设置。所述第二辐射体13的对称型结构类似于偶极天线，具有调整阻抗匹配与辐射电磁波的功能，当增加所述第一辐射臂1311与第二辐射臂1331的数量后，在有限的面积里，可以加强彼此耦合，从而增加阻抗频宽。
所述第一辐射体11与所述第二辐射体13面面平行设置，且均与连接部15面面垂直连接设置。第二辐射体13整体位于第一辐射体11的一侧，具体为该第二辐射体13的连接边135的外缘与第一辐射体11的第二长边113的内缘相对准设置，以便连接部15分别与第一辐射体11与所述第二辐射体13面面垂直连接。所述连接部15为一矩形片状体，其一端垂直连接于所述第一辐射体11的第二长边113的内缘的中部，另一端垂直连接于所述第二辐射体13的连接边135外缘的中部。
所述馈入线17一端垂直连接于所述第一辐射体11的第一长边111中部，另一端垂直连接至所述电路板30，且该馈入线17、该第一辐射体11与该电路板30位于同一平面。
请一并参阅图2，所示为本较佳实施例宽频天线10的主要尺寸，其中，第一辐射体11的第一长边111的长度为11mm，短边115的长度为2mm。第二辐射体13的第一侧边131的长度为13mm；连接边135的长度为20mm；第一辐射壁1311的长度为8mm，宽度为0.5mm，且相邻第一辐射臂1311间的间距为2.5mm。
请参阅图3，所示为本较佳实施例宽频天线10在模拟软件检测下获得的最佳化的回波损耗(return loss，RL)示意图。由图3可以看出，在测试过程中，所述宽频天线10在高频-6dB回波损耗频宽可达1300MHz(1400MHz～2700MHz)。因此，所述宽频天线10工作时的频宽范围可涵盖到GPS 1500MHz、DCS 1800MHz、PCS 1900MHz、UMT S2100MHz及WLAN 2400MHz等五个通信系统的频宽。
请参阅图4，所示为本较佳实施例宽频天线10在模拟软件下测得的其工作频段的辐射效率示意图。由图4可以看出，所述宽频天线10在其工作频段的辐射效率平均可达90％以上，具有稳定的辐射性能及应用价值。
相较于现有技术，所述宽频天线10采用双调节阻抗匹配的结构来增加工作频宽，辐射效率高，体积小，其宽频范围可涵盖GPS，DCS/PCS/UMTS及WLAN等通信系统。
另外，本领域技术人员还可在本发明权利要求公开的范围和精神内做其他形式和细节上的各种修改、添加和替换。当然，这些依据本发明精神所做的各种修改、添加和替换等变化，都应包含在本发明所要求保护的范围之内。
Claims (7)
1.一种宽频天线，包括一第一辐射体、一第二辐射体、一连接部及一馈入线，该第一辐射体与第二辐射体通过该连接部相连接；其特征在于：该第一辐射体与第二辐射体面面平行设置，该第一辐射体呈一矩形的框体结构，用于调整所述宽频天线前端的阻抗匹配与应用频宽，该第二辐射体为一对称型结构，包括若干第一辐射臂及若干第二辐射臂，通过辐臂间的相互耦合来增加阻抗频宽。
2.如权利要求1所述的宽频天线，其特征在于：所述第二辐射体还包括一第一侧边、一第二侧边及一连接边，所述第一侧边与第二侧边相对设置，形状大小相同且分别连接于所述连接边两端。
3.如权利要求2所述的宽频天线，其特征在于：所述若干第一辐射臂由所述第一侧边朝向第二侧边延伸而成，且所述若干第一辐射臂从第一侧边远离所述连接边的端部开始平行于连接边等间隔设置。
4.如权利要求3所述的宽频天线，其特征在于：所述若干第一辐射臂为长条状。
5.如权利要求3所述的宽频天线，其特征在于：所述若干第二辐射臂与所述第一辐射臂对称间隔设置，其由所述第二侧边朝向第一侧边平行于连接边等间隔延伸而成。
6.如权利要求1所述的宽频天线，其特征在于：所述第一辐射体包括一第一长边、一第二长边及二短边，所述第一长边与所述第二长边相对设置，所述二短边相对设置，通过调节第一长边、第二长边及二短边的长度，来调节所述宽频天线前端的阻抗匹配与应用频宽。
7.如权利要求6所述的宽频天线，其特征在于：所述第一辐射体通过所述馈入线与一电路板相连接，且三者位于同一平面上。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910303052.5A CN101908668B (zh) | 2009-06-08 | 2009-06-08 | 宽频天线 |
| US12/693,641 US8330666B2 (en) | 2009-06-08 | 2010-01-26 | Multiband antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910303052.5A CN101908668B (zh) | 2009-06-08 | 2009-06-08 | 宽频天线 |
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| Publication Number | Publication Date |
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| CN101908668A true CN101908668A (zh) | 2010-12-08 |
| CN101908668B CN101908668B (zh) | 2013-07-03 |
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| CN200910303052.5A Expired - Fee Related CN101908668B (zh) | 2009-06-08 | 2009-06-08 | 宽频天线 |
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| US (1) | US8330666B2 (zh) |
| CN (1) | CN101908668B (zh) |
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| US7868836B2 (en) * | 2006-07-26 | 2011-01-11 | Lg Electronics Inc. | Antenna and mobile terminal |
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| US20080111757A1 (en) * | 2002-12-13 | 2008-05-15 | Peter John Bisiules | Dipole Antennas and Coaxial to Microstrip Transitions |
| CN1734836A (zh) * | 2004-08-10 | 2006-02-15 | 富士康(昆山)电脑接插件有限公司 | 天线 |
| US20080266191A1 (en) * | 2005-11-10 | 2008-10-30 | Nxp B.V. | Broadband Antenna For a Transponder of a Radio Frequency Identification System |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20100309067A1 (en) | 2010-12-09 |
| CN101908668B (zh) | 2013-07-03 |
| US8330666B2 (en) | 2012-12-11 |
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