A Sequential-Phase Feed Using a Circularly Polarized Shorted Loop Structure
A Sequential-Phase Feed Using a Circularly Polarized Shorted Loop Structure
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DOI：
10.1109/tap.2012.2227103
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发表时间：
2013-03
影响因子：
5.7
通讯作者：
Yue Li;Zhijun Zhang;Zhenghe Feng
中科院分区：
文献类型：
--
作者：
Yue Li;Zhijun Zhang;Zhenghe Feng
该通信提出了一种新的四端口馈电结构，采用圆极化（CP）短路回路，具有0°、90°、180°和270 °的顺序相位（SP）。环路的四个短路片上连接一个2 × 2单馈圆极化角截贴片阵列，作为四个相位差稳定的馈电口。通过使用建议的SP馈电，阵列的轴比（AR）带宽增加到7%以上，比以前的设计更宽。实验结果表明，该天线的带宽为4.86- 5.12GHz（S11 ≤-10dB，<3dB，增益变化在3dB以内）。
This communication presents a new 4-port feeding structure with sequential phase (SP) of 0°, 90°, 180° and 270 using a circularly polarized (CP) shorted loop. A 2 × 2 single-fed circularly polarized cornertruncated patch array is connected to the loop's four shorting strips, which serve as 4 feeding ports with stable phase difference. By using the proposed SP feed, the axial ratio (AR) bandwidth of the array is increased to more than 7%, wider than the previous design. A prototype of the proposed antenna is built to validate the design experimentally, and a global bandwidth of 4.86-5.12 GHz is achieved (S11 ≤ -10 dB, <;3 dB, and gain variation within 3 dB).