AUTHOR=Pan Bai Cao , Guo Ben Jian , Yu Ping , Cai Ben Geng , Dai Xi Wang , Luo Guo Qing 

TITLE=Highly Efficient Dual-Beam Frequency Scanning Based on SSPPs With Parasitic Patch Array

JOURNAL=Frontiers in Physics

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2022.851121

DOI=10.3389/fphy.2022.851121

ISSN=2296-424X

ABSTRACT=<p>A leaky-wave antenna (LWA) realizes radiation of travelling wave along guiding structures. Periodic modulation is an effective approach to turn non-radiating modes into radiating modes. A high-efficient LWA based on spoof surface plasmon polaritons (SSPPs) loaded with parasitic patch array is proposed. Sinusoidal modulation is used for the radiation of SSPPs, while parasitic array mitigates the open stopband (OSB) effect. A prototype is fabricated and measured. The measured and simulated results agree well with each other. Such design shows wide angle coverage of 83<inline-formula id="inf1"><mml:math id="m1" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mo>°</mml:mo></mml:math></inline-formula> from backward to forward and stable gain distribution of about 12 dB within the whole operating band.</p>