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用于宽角波束扫描阵列的宽带宽波束圆极化缝隙耦合天线。

Wide-Band Wide-Beam Circularly-Polarized Slot-Coupled Antenna for Wide-Angle Beam Scanning Arrays.

机构信息

ELEDIA Research Center, DICAM-Department of Civil, Environmental, and Mechanical Engineering, ELEDIA@UniTN-University of Trento, Via Mesiano 77, 38123 Trento, Italy.

ELEDIA Research Unit, CNIT-University of Trento, Via Sommarive 9, 38123 Trento, Italy.

出版信息

Sensors (Basel). 2023 Jan 18;23(3):1123. doi: 10.3390/s23031123.

DOI:10.3390/s23031123
PMID:36772162
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9921574/
Abstract

The design of a wide-band wide-beam circularly-polarized slot-coupled (WWCS) radiating element for wide-angle scanning arrays (WASAs) is addressed. The WWCS radiator exploits a simple geometry composed of a primary (driven) and a secondary (passive) element to generate wide-beam patterns with rotational symmetry and high polarization purity. The synthesis was carried out by means of a customized version of the System-by-Design (SbD) method to derive a WWCS radiator with circular polarization (CP) and wide-band impedance matching. The results of the numerical assessment, along with a tolerance analysis, confirm that the synthesized WWCS radiating element is a competitive solution for the implementation of large WASAs. More specifically, a representative design working at f0=2.45 [GHz] is shown having fractional bandwidth FBW≃15%, half-power beam-width HPBWf0≃180 [deg] in all elevation planes, and high polarization purity with broadside axial ratio ARf0=3.2 [dB] and cross-polar discrimination XPDf0=15 [dB]. Finally, the experimental assessment, carried out on a PCB-manufactured prototype, verifies the wide-band and wide-beam features of the designed WWCS radiator.

摘要

一种用于宽角扫描阵列 (WASA) 的宽带宽波束圆极化缝隙耦合 (WWCS) 辐射元件的设计。WWCS 辐射器利用由主 (驱动) 和次 (被动) 元件组成的简单几何形状，产生具有旋转对称性和高极化纯度的宽波束图案。通过定制的系统设计 (SbD) 方法来进行综合，以获得具有圆极化 (CP) 和宽带阻抗匹配的 WWCS 辐射器。数值评估的结果，以及容差分析，证实了所合成的 WWCS 辐射元件是实现大型 WASA 的一种有竞争力的解决方案。具体来说，展示了一个工作在 f0=2.45 [GHz] 的代表性设计，在所有仰角平面中具有分数带宽 FBW≃15%，半功率波束宽度 HPBWf0≃180 [度]，以及宽边轴比 ARf0=3.2 [dB] 和交叉极化鉴别 XPDf0=15 [dB] 的高极化纯度。最后，在 PCB 制造的原型上进行的实验评估验证了所设计的 WWCS 辐射器的宽带和宽波束特性。

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