Design of Active Integrated GNSS Antenna Based on the Impedance Transforming Quadrature Four-Feed Network

IF 1.2 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Antennas and Propagation Pub Date : 2023-11-06 DOI:10.1155/2023/3828460

Yao Wang, Hongmei Liu, Shuo Li, Zhongbao Wang, Shaojun Fang

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引用次数: 0

Abstract

In the paper, a wideband miniaturized impedance-transforming quadrature four-feed network with a flat output phase difference is presented and applied to the design of an active integrated GNSS antenna where no extra impedance matching circuit is needed. The features of impedance transformation and flat output phase difference are achieved by the proposed miniaturized rat-race coupler. When combining the proposed rat-race coupler with two trans-directional (TRD) couplers, a four-feed network with stable sequential quadrature phase shifts is obtained in the whole GNSS band. Since the quadrature four-feed network has the feature of impedance transformation, integration with a low-noise amplifier (LNA) can be realized without extra impedance matching circuits, which reduce the overall size and losses. For validation, a simple rectangular patch is applied as the radiator, and the active prototype is fabricated. Measurement results show that over the entire GNSS band from 1.164 GHz to 1.610 GHz, the miniaturized integrated antenna exhibits a return loss of more than 10 dB, an axial ratio of less than 3 dB axial ratio, and a gain of greater than 16 dBic.

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基于阻抗变换正交四馈网络的有源集成GNSS天线设计

本文提出了一种具有平坦输出相位差的宽带小型化阻抗变换正交四馈网络，并将其应用于不需要额外阻抗匹配电路的有源集成GNSS天线设计。小型化的大鼠赛跑耦合器具有阻抗变换和输出相位差平坦的特点。将所提出的大鼠式耦合器与两个跨向(TRD)耦合器组合，在整个GNSS频段内获得了一个稳定的顺序正交相移的四馈网络。由于正交四馈网络具有阻抗变换特性，因此无需额外的阻抗匹配电路即可实现与低噪声放大器(LNA)的集成，从而减小了整体尺寸和损耗。为了验证，采用一个简单的矩形贴片作为辐射体，并制作了有源原型。测量结果表明，在1.164 GHz ~ 1.610 GHz的整个GNSS频段内，小型化集成天线回波损耗大于10 dB，轴比小于3 dB，增益大于16 dBic。

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

International Journal of Antennas and Propagation ENGINEERING, ELECTRICAL & ELECTRONIC-TELECOMMUNICATIONS

CiteScore

3.10

自引率

13.30%

发文量

158

审稿时长

3.8 months

期刊介绍： International Journal of Antennas and Propagation publishes papers on the design, analysis, and applications of antennas, along with theoretical and practical studies relating the propagation of electromagnetic waves at all relevant frequencies, through space, air, and other media. As well as original research, the International Journal of Antennas and Propagation also publishes focused review articles that examine the state of the art, identify emerging trends, and suggest future directions for developing fields.