Analysis of a Leaky-wave Antenna with High Scanning Rate Using Microstrip Phase Delay Lines

2023 Photonics & Electromagnetics Research Symposium (PIERS) Pub Date : 2023-07-03 DOI:10.1109/PIERS59004.2023.10221280

Yiming Zhang, Wei Wu, Yuxi Liu, Sailing He

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Abstract

In this paper, we analyze the microstrip phase delay (PD) lines of different lengths are applied between the unit-cells (UCs) of leaky-wave antenna (LWA). The employment of PD lines can offer the phase compensations (PCs) for each UC, the simulation experiments observed that the PD lines can significantly improve the realized gain of LWA and reduce the operating bandwidth due to longer PD lines exciting the higher order modes of phase constant. Therefore, the scanning rates (SRs), i.e., scanning range divided by operating bandwidth (%), can remarkably increase. Besides, in order to maintain the beam scanning ability of LWA in travelling-wave direction (or longitudinal direction), the PD lines are placed and varied in the lateral direction. The phase constants in the lateral direction component are also proven to be able to excite higher order modes. Benefit from this, the multi-beam LWAs in the lateral direction can be obtained by the PD lines with optimal lengths, and patterns of multi-beam are fixed with the operating frequency changing.

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基于微带相位延迟线的高扫描速率漏波天线分析

本文分析了漏波天线单元间不同长度的微带相位延迟线。利用PD线可以对每个UC进行相位补偿，仿真实验发现，由于较长的PD线可以激励相位常数的高阶模式，因此可以显著提高LWA的实现增益，降低工作带宽。因此，扫描速率(SRs)，即扫描范围除以工作带宽(%)，可以显著增加。此外，为了保持LWA在行波方向(或纵波方向)的波束扫描能力，PD线在横向放置和变化。横向分量中的相位常数也被证明能够激发高阶模。利用这一点，可以通过最优长度的PD线获得横向多波束LWAs，并且随着工作频率的变化，多波束的模式是固定的。

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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2023 Photonics & Electromagnetics Research Symposium (PIERS)

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