Wideband Beam-Scanning Circularly Polarized Inclined Slots Using Ridge Gap Waveguide
Wideband Beam-Scanning Circularly Polarized Inclined Slots Using Ridge Gap Waveguide
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DOI：
10.1109/lawp.2014.2331679
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发表时间：
2014-06
影响因子：
4.2
通讯作者：
M. Al Sharkawy;A. Kishk
中科院分区：
文献类型：
--
作者：
M. Al Sharkawy;A. Kishk
利用脊隙波导(RGW)技术设计了一种用于波束扫描的宽带圆极化(CP)频率相关缝隙天线阵列。这里实现了印刷技术和RGW技术的融合，以提供宽带CP天线阵。制作了所设计的共面天线，给出了测试结果，并与全波分析结果进行了比较。在12.5~15.5 GHz频率范围内，测得的天线轴比和阻抗带宽约为21%。该天线在保持3dBAR的CP特性的同时，实现了从后向向的连续波束扫描，包括覆盖+15°~-15°的宽边辐射，平均增益为12.5dBI。
A wideband circularly polarized (CP) frequency-dependent slot antenna array is designed for beam scanning using the ridge gap waveguide (RGW) technology. The merge between both the printed and the RGW technologies for providing a wideband CP antenna array is newly implemented here. The designed CP antenna has been fabricated, and measurement results are provided and compared to the full-wave analysis. A measured antenna axial ratio (AR) and impedance bandwidths of ~ 21% are achieved from 12.5 to 15.5 GHz. The proposed antenna preserves its CP characteristics of AR below 3 dB while achieving continuous frequency beam scanning from backward to forward directions including broadside radiation that covers +15° to -15° with an average gain of 12.5 dBi.