Dual-Band Dual Circularly Polarized Antenna With a Simple Feeding Network Based on Transmission Line Dispersion

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2025-06-10 DOI:10.1109/LAWP.2025.3578398

Yunfan Deng;Long Li;Shaowei Liao

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Abstract

This letter proposes a new methodology for the feeding network with flexible phase difference of ±90°, while also adapting it to realize a dual-band, dual circularly polarized (CP) antenna. The antenna consists of a dual-fed stacked patch radiator cascaded with a simple dual-band dual-CP feeding network. First, the feeding network consists of a power divider cascaded with two transmission lines (TLs) with different lengths. Because of the dispersion characteristics of TLs, the phase differences of the two output ports are −90° and +90° at two bands, respectively. Second, a dual-fed stacked patch radiator operating at these two bands is cascaded with the feeding network, enabling dual-band dual-CP radiation. An S-band prototype is designed, fabricated, and measured. The measured results indicate that the antenna obtains an overlapping operating bandwidth (with S₁₁≤−10 dB and axis ratio ≤ 3 dB) of 5.4% (2.15 GHz to 2.27 GHz) for the lower band with right-hand CP (RHCP) mode and 6.4% (2.74 GHz to 2.92 GHz) for the upper band with left-hand CP (LHCP) mode, respectively.

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基于传输线色散的简单馈电网络双频双圆极化天线

本文提出了一种具有±90°柔性相位差馈电网络的新方法，并将其应用于实现双频双圆极化（CP）天线。该天线由一个双馈叠加贴片辐射器和一个简单的双频双cp馈电网络级联组成。首先，馈电网络由一个功率分配器级联两个不同长度的传输线（TLs）组成。由于TLs的色散特性，两个输出端口在两个波段的相位差分别为- 90°和+90°。其次，在这两个波段工作的双馈堆叠贴片辐射器与馈电网络级联，实现双频双cp辐射。设计、制作并测量了s波段样机。测量结果表明，该天线在右侧CP （RHCP）模式下的下频段获得5.4% （2.15 GHz ~ 2.27 GHz）的重叠工作带宽（S11≤−10 dB，轴比≤3 dB），在左侧CP （LHCP）模式下的上频段获得6.4% （2.74 GHz ~ 2.92 GHz）的重叠工作带宽。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.