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Open AccessArticle

A Dual-Beam Leaky-Wave Antenna Based on Squarely Modulated Reactance Surface

School of Electronic and Information Engineering, Harbin Institute of Technology, Harbin 150001, China
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Appl. Sci. 2020, 10(3), 962; https://doi.org/10.3390/app10030962
Received: 5 January 2020 / Revised: 31 January 2020 / Accepted: 1 February 2020 / Published: 2 February 2020
(This article belongs to the Special Issue Advanced Active and Passive Metasurfaces)
In this paper, a novel dual-beam leaky-wave antenna (LWA) based on squarely modulated reactance surface (SquMRS) is proposed. The equivalent transmission lines model is utilized to characterize the field distributions of surface wave guided by the SquMRS. The calculated dispersion characteristics of SquMRS are verified by the simulated results, and it is demonstrated that SquMRS exhibits a more flexible control of phase constant and attenuation constant compared with traditional sinusoidally modulated reactance surface (SinMRS), which means SquMRS has a great potential for near-field focusing and far-field beam shaping. On this basis, a versatile method, based on a superposition of individual modulation patterns, was used to generated two beams with almost identical gain at 8.5 GHz. The measured results show that the gains are 10 dBi and 8.2 dBi at θ1 = −30° and θ2 = 18°, respectively, and the radiation efficiency is 83%, which shows good agreement with the simulated results. View Full-Text
Keywords: leaky-wave antenna (LWA); squarely modulated reactance surface (SquMRS); surface wave leaky-wave antenna (LWA); squarely modulated reactance surface (SquMRS); surface wave
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MDPI and ACS Style

Yu, H.; Zhang, K.; Ding, X.; Wu, Q. A Dual-Beam Leaky-Wave Antenna Based on Squarely Modulated Reactance Surface. Appl. Sci. 2020, 10, 962.

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