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T-type folded SIW-based leaky-wave antennas with wide scanning angle and low cross-polarization

Published online by Cambridge University Press:  20 September 2021

Shixiao Xiao  and
Lianwu Yang
Shixiao Xiao
Affiliation:
Chengyi College, Jimei University, Xiamen, Fujian 361021, China
Lianwu Yang*
Affiliation:
Mathematical and Computer Science College, Yichun University, Yichun 336000, China
*
Author for correspondence: Lianwu Yang, E-mail: ycumath@163.com
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Abstract

In this paper, a leaky-wave antenna (LWA) with wide scanning angle and low cross-polarization is proposed based on a T-type folded substrate-integrated waveguide (FSIW). Transverse slots with a sinusoidal distribution pattern are etched on the surface of the FSIW so that transmission lines with slow-wave characteristics can excite and radiate −1 order harmonics. The length of the transverse slot affects the dispersion characteristics of the transmission line, and the sinusoidal modulation period controls the operating range of the LWA. In the frequency range of 8.3–15 GHz, the proposed LWA achieves a wide scanning ranging from backward −42° to forward +68° continuously. The cross-polarization of the beam is also kept at less than −30 dB during this scanning. A prototype is fabricated and measured to confirm the design, and the measured results show an agreement with the simulated one.

Keywords

Folded substrate-integrated waveguideleaky-wave antennalow cross-polarizationwide scanning angle
Type
Antenna Design, Modelling and Measurements
Information
International Journal of Microwave and Wireless Technologies , Volume 14 , Issue 8 , October 2022 , pp. 949 - 954
Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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