Wideband and compact horizontally polarized omnidirectional antenna using composite dipole elements

Wideband and compact horizontally polarized omnidirectional antenna using composite dipole elements
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使用复合偶极子元件的宽带紧凑型水平极化全向天线

DOI:
10.1002/mmce.21082
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发表时间:
2017-05
影响因子:
1.7
通讯作者:
Chen Xi
Chen Xi
中科院分区:
工程技术4区
文献类型:
--
作者:
Yang Long;Chen Xi

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本文设计并实现了一种宽带水平极化全向天线。该天线由四个复合振子在方位平面上形成圆形阵列和四对平行带状线组成阻抗Transformer网络。复合振子由两种振子组成,实现了宽带工作。通过利用复合偶极子,可以同时激发和操纵四个谐振以增加带宽。制造了一个原型来验证该方法。天线的尺寸仅为0.62λ0 × 0.62λ0 × 0.03λ0(λ0是中心频率处的自由空间波长)。测试结果表明,该天线在驻波小于等于2时,阻抗带宽为58.6%(1.63-2.98 GHz)。在工作频带内,方位面增益变化小于0.6dB。同时,交叉极化小于20 dB,峰值增益达到1.7 dBi。天线的这些优点使其适合于4G移动的通信应用。
A wideband horizontally polarized (HP) omnidirectional antenna is constructed and experimented in this article. The antenna consists of four composite dipoles forming a circular array in the azimuth plane and four pairs of parallel strip lines as impedance transformer networks. Two kinds of dipoles compose the composite dipole to achieve a wideband operation. By utilizing the composite dipole, four resonances can be simultaneously excited and manipulated to increase the bandwidth. A prototype is manufactured to validate the method. The dimensions of the antenna are just 0.62λ0 × 0.62λ0 × 0.03λ0 (λ0 is the free‐space wavelength at center frequency). The measured results show that the presented antenna has a impedance bandwidth of 58.6% (1.63–2.98 GHz) for VSWR ≤2. The gain variations are less than 0.6 dB at the azimuth plane in the operating band. Meanwhile, the cross‐polarization is less than 20 dB and the peak gain reaches 1.7 dBi among in the band. These advantages of the antenna make it suitable for 4G mobile communication applications.
DOI: 10.1002/mmce.20897
发表时间: 2015-09
期刊: International Journal of RF and Microwave Computer‐Aided Engineering
影响因子: --
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