Enhanced scanning rate for SIW-LWA with continuous beam steering using delay lines

R. Agarwal, Himanshu Kumar, Himanshu Mishra
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Abstract

A backward-to-forward continuous beam scanning leaky wave antenna (LWA) in substrate integrated waveguide (SIW) technology using delay lines is demonstrated in this study. A periodical H-shaped grooves on the top surface of SIW are etched to provide the slow-wave effect. Delay lines is introduced to change the group delay profile, increasing the SR. According to simulations, the presented LWA scans a broad angle in a limited bandwidth. Within the frequency range of 11.6 GHz to 12.3 GHz, scanning angle ranging from -41° to +31° (overall scanning angle of 72°) with scanning rate of 90°/GHz. This antenna has maximum gain of 14.53 dBi at 11.9 GHz and 92.5% efficiency, which is acceptable considering the antenna’s compact size.
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利用延迟线提高 SIW-LWA 连续光束转向的扫描速率
本研究利用延迟线在基底集成波导(SIW)技术中演示了一种从后向前的连续波束扫描漏波天线(LWA)。在 SIW 的顶面蚀刻了周期性的 H 形凹槽,以提供慢波效应。延迟线的引入改变了群延迟曲线,增加了 SR。根据模拟,所提出的 LWA 可在有限的带宽内进行大角度扫描。在 11.6 GHz 至 12.3 GHz 的频率范围内,扫描角度为 -41° 至 +31°(总扫描角度为 72°),扫描速率为 90°/GHz。该天线在 11.9 GHz 时的最大增益为 14.53 dBi,效率为 92.5%。
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