A Broadband Low-Profile Circular-Polarized Antenna on an AMC Reflector
A Broadband Low-Profile Circular-Polarized Antenna on an AMC Reflector
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AMC 反射器上的宽带薄型圆极化天线
DOI：
10.1109/lawp.2017.2749246
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发表时间：
2017-01-01
影响因子：
4.2
通讯作者：
Yang, Dong
中科院分区：
文献类型：
--
作者：
Feng, Dan;Zhai, Huiqing;Yang, Dong
本文提出了一种基于人工磁导体（AMC）反射面的宽带低剖面圆极化（CP）天线。该天线通过90°移相器对宽带交叉偶极子馈电，实现了基本的宽带圆极化辐射特性。进一步引入AMC反射器来实现宽带低剖面CP天线。本CP天线的阻抗带宽（VSWR < 2）约为1.19-2.37 GHz（66.3%），轴比（AR）带宽（AR < 3 dB）约为1.25-1.97 GHz（44.7%）。该天线具有20.1 mm的低剖面（在中心频率1.78 GHz处约为0.12 λ0）。仿真和实测结果表明，该圆极化天线在低剖面条件下具有较宽的阻抗和AR带宽。
A broadband low-profile circular-polarized (CP) antenna on an artificial magnetic conductor (AMC) reflector is proposed in this letter. The basic wideband circular polarization radiation characteristic of the antenna is achieved by feeding broadband crossed dipole through a 90° phase shifter. An AMC reflector is further introduced to realize a broadband low-profile CP antenna. The impedance bandwidth (VSWR < 2) of the present CP antenna is about 1.19–2.37 GHz (66.3%), and the axial-ratio (AR) bandwidth (AR < 3 dB) is about 1.25–1.97 GHz (44.7%). The antenna has a low profile of 20.1 mm (about 0.12 λ0 at the center frequency of 1.78 GHz). The simulated and measured results show that the proposed CP antenna has wide impedance and AR bandwidth in the condition of low profile.