Waveguide matching crossed-slot
Waveguide matching crossed-slot
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波导匹配交叉槽
DOI：
10.1049/ip-map:20030471
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发表时间：
2003
影响因子：
0.7
通讯作者：
M. Ando
中科院分区：
文献类型：
--
作者：
T. Hirano;J. Hirokawa;M. Ando
利用矩量法分析和设计了一种匹配的交叉缝隙，它位于波导交叉缝隙阵列的短接端，将阵列波束方向上的圆极化剩余功率全部辐射出去。本征模函数的交叉槽数值推导的基于边缘的有限元法（FEM）被用作在矩量法的基函数。圆偏振的机制可以用两种模式来解释，每种模式都辐射线偏振。在3.6GHz频率下设计并测试了匹配的十字槽。在3.5 GHz至3.7 GHz的5.6%带宽范围内，测量的反射被抑制在-15 dB以下。在50度方向上的计算和测量的轴比分别为0.32 dB和1.5 dB。
A matching crossed-slot, which is accommodated at the shorted end of a waveguide crossed-slot array and radiates all the residual power with circular polarisation in an array beam direction, is analysed and designed by the method of moments (MoM). The eigenmode functions for a crossed-slot derived numerically by the edge-based finite element method (FEM) are utilised as the basis functions in the MoM. The mechanism of circular polarisation is interpreted in terms of two modes each radiating linear polarisation. A matching crossed-slot is designed and tested at 3.6 GHz. The measured reflection is suppressed below -15 dB over a 5.6% bandwidth from 3.5 GHz to 3.7 GHz. The calculated and measured axial ratios in a direction of 50 degrees are 0.32 dB and 1.5 dB, respectively.