Wide-band SIW cavity-backed circular polarized array antennas with sequential rotation technique

D. Guan, C. Ding, Haihan Sun, Feng Yuan
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引用次数: 2

Abstract

A circularly-polarized (CP) array antenna based on the substrate integrated waveguide (SIW) technology is proposed. The 2×2 linearly polarized SIW sub-arrays with 90° sequential rotation are employed as the radiating elements on the top layer. The sequential rotation technique is introduced to design SIW corporate-feed network on the bottom layer to realize wideband circular polarized characteristic. The network and the radiating elements of the array are both designed on close SIW structure with low cost printed circuit board (PCB) technology. The simulated results show that, the proposed 4×4 array has a large axial ratio (AR) bandwidth of 14% from 18.3 GHz to 21.1 GHz with a gain above 13 dBi.
采用顺序旋转技术的宽带SIW腔背圆极化阵列天线
提出了一种基于基片集成波导技术的圆极化(CP)阵列天线。采用90°顺序旋转的2×2线极化SIW子阵列作为顶层的辐射元件。为了实现宽带圆极化特性,在底层采用顺序旋转技术设计SIW企业馈电网络。该阵列的网络和辐射元件均采用低成本印刷电路板(PCB)技术,采用紧凑的SIW结构设计。仿真结果表明,4×4阵列在18.3 GHz ~ 21.1 GHz范围内具有14%的大轴比带宽,增益在13 dBi以上。
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