开槽宽带圆极化交叉偶极子天线
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- 英文论文题名：Slit Loaded Wideband Circularly Polarized Cross-Dipole Antenna
- 论文作者：花鹏成 ; 张帅 ; 龚书喜
- 英文论文作者：HUA Peng-cheng ; ZHANG Shuai ; GONG Shu-xi ; College of Electronic Engineering ; Xidian University.
- 年：2016
- 作者机构：西安电子科技大学天线所;
- 论文关键词：圆极化 ; 交叉偶极子 ; 宽带天线
- 英文论文关键词：circularly polarized ; cross-dipole ; wideband antenna
- 会议召开时间：2016-08-17
- 会议录名称：2016年全国军事微波、太赫兹、电磁兼容技术学术会议论文集
- 语种：中文
- 分类号：TN821.4
- 学会代码：WBXB
- 会议名称：2016年全国军事微波、太赫兹、电磁兼容技术学术会议
- 会议地点：中国陕西西安
- 主办单位：中国电子学会微波分会、天线与微波技术重点实验室
- 学会名称：《微波学报》编辑部
- 页数：4
- 文件大小：919k
- 原文格式：D
- 会议级别：全国
摘要
基于双层印刷电路板,设计了一个宽带圆极化交叉偶极子天线,用于2.45GHz ISM频段的无线通信。它与传统的交叉偶极子天线的不同在于它拥有较宽的阻抗匹配带宽和轴比带宽。为了实现圆极化,在两个偶极子单元之间添加了弯曲延迟线以实现正交相位差。通过选择合适的弯曲延迟线的半径,可以实现一个较宽的输入阻抗。天线由50欧姆的同轴线中心馈电。为了增强定向辐射强度,天线下方放置了一个方形的反射板。由于中心馈电的优势,对称圆极化辐射可以在整个工作频带上实现。为了拓宽圆极化带宽,在偶极子壁上开槽和切角。仿真结果显示,此天线拥有良好的圆极化特性。驻波比(VSWR≤2)带宽为41.5%(2.08~3.17 GHz),3d B轴比带宽为32.8%(2.19~3.05 GHz)。天线在工作频带内的最大圆极化增益为6.89 d Bic。天线的尺寸为0.45λ?0.45λ?0.24λ。
This letter introduces a wideband circularly polarized(CP) cross-dipole antenna fabricated on a double-layered printed circuit board(PCB) substrate for 2.45-GHz ISM band wireless communications. Unlike conventional cross-dipole antennas, the proposed cross dipole is designed with wide open ends such that both impedance and axial-ratio(AR) bandwidths are enhanced. In addition, to excite the CP radiation effectively, a curved-delay line providing an orthogonal phase difference among the cross-dipole elements is attached at the corners of the sequentially rotated elements. By choosing a proper radius of the curved-delay line, a wide input impedance of the antenna can be realized. The antenna is center-fed by a 50 ohm coaxial cable and is placed above a square reflector to obtain a directional CP radiation pattern. With the advantage of centered feed, symmetr ic CP radiation patterns can be achieved across the entire operating band width. By meticulously arranging these eight slits, a wide CP bandwidth was achieved. Simulated and measured results confirm the proposed antenna produced good CP characteristics. An impedance band-width(for VSWR ≤ 2) of about 41.5%(2.08~3.17 GHz) and the 3-d B AR bandwidth of about 32.8%(2.19–3.05 GHz). The antenna has the maximum gain of 6.89 d Bic at the operating bandwidth. The size of antenna is 0.45λ?0.45λ?0.24λ.
This letter introduces a wideband circularly polarized(CP) cross-dipole antenna fabricated on a double-layered printed circuit board(PCB) substrate for 2.45-GHz ISM band wireless communications. Unlike conventional cross-dipole antennas, the proposed cross dipole is designed with wide open ends such that both impedance and axial-ratio(AR) bandwidths are enhanced. In addition, to excite the CP radiation effectively, a curved-delay line providing an orthogonal phase difference among the cross-dipole elements is attached at the corners of the sequentially rotated elements. By choosing a proper radius of the curved-delay line, a wide input impedance of the antenna can be realized. The antenna is center-fed by a 50 ohm coaxial cable and is placed above a square reflector to obtain a directional CP radiation pattern. With the advantage of centered feed, symmetr ic CP radiation patterns can be achieved across the entire operating band width. By meticulously arranging these eight slits, a wide CP bandwidth was achieved. Simulated and measured results confirm the proposed antenna produced good CP characteristics. An impedance band-width(for VSWR ≤ 2) of about 41.5%(2.08~3.17 GHz) and the 3-d B AR bandwidth of about 32.8%(2.19–3.05 GHz). The antenna has the maximum gain of 6.89 d Bic at the operating bandwidth. The size of antenna is 0.45λ?0.45λ?0.24λ.
引文
[1]Z.Chen,W.Toh,and X.Qing,“A microstrip patch antenna with broadened beamwidth,”Microw.Opt.Technol.Lett.,vol.50,no.7,pp.1885-1888,Jul.2008.
[2]G.Massie,M.Caillet,M.Clenet,and Y.M.M.Antar,“Anew wide-band circularly polarized hybrid dielectric resonator antenna,”IEEE Antennas Wireless Propag.Lett.,vol.9,pp.347-350,2010.
[3]C.W.Su,S.K.Huang,and C.H.Lee,“CP microstrip antenna with wide beamwidth for GPS band application,”Electron.Lett.,vol.43,no.20,pp.1062-1063,Sep.2007.
[4]C.Wu,L.Han,F.Yang,L.Wang,and P.Yang,“Broad beamwidth circular polarization antenna:Microstrip monopole antenna,”Electron.Lett.,vol.48,no.19,pp.1176-1178,Sep.2012.
[5]T.Kumar and A.R.Harish,“Dipole excited wideband circularly polarized slot antenna,”in IEEE Antennas Propag.Soc.Int.Symp.Dig.,Chicago,IL,USA,Jul.2012,pp.8-14.
[6]Yejun He,Wei He and Hong Wong,“A Wideband Circularly Polarized Cross-Dipole Antenna,”in IEEEAntenna And Wireless Propagation Letters,Vol.13,2014,pp.66-70.
[2]G.Massie,M.Caillet,M.Clenet,and Y.M.M.Antar,“Anew wide-band circularly polarized hybrid dielectric resonator antenna,”IEEE Antennas Wireless Propag.Lett.,vol.9,pp.347-350,2010.
[3]C.W.Su,S.K.Huang,and C.H.Lee,“CP microstrip antenna with wide beamwidth for GPS band application,”Electron.Lett.,vol.43,no.20,pp.1062-1063,Sep.2007.
[4]C.Wu,L.Han,F.Yang,L.Wang,and P.Yang,“Broad beamwidth circular polarization antenna:Microstrip monopole antenna,”Electron.Lett.,vol.48,no.19,pp.1176-1178,Sep.2012.
[5]T.Kumar and A.R.Harish,“Dipole excited wideband circularly polarized slot antenna,”in IEEE Antennas Propag.Soc.Int.Symp.Dig.,Chicago,IL,USA,Jul.2012,pp.8-14.
[6]Yejun He,Wei He and Hong Wong,“A Wideband Circularly Polarized Cross-Dipole Antenna,”in IEEEAntenna And Wireless Propagation Letters,Vol.13,2014,pp.66-70.