A Wideband Leaky-Wave Lens Antenna with Annular Corrugations in the Ground Plane

Journal article (2022)

Authors

S. Bosma Tera-Hertz Sensing - EEMCS
N. van Rooijen Tera-Hertz Sensing - EEMCS
M. Alonso Del Pino Tera-Hertz Sensing - EEMCS
Nuria Llombart Tera-Hertz Sensing - EEMCS
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
Copyright: © 2022 S. Bosma, N. van Rooijen, M. Alonso Del Pino, Nuria Llombart
DOI: https://doi.org/10.1109/LAWP.2022.3176884
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Published Date

2022

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

We present a resonant leaky-wave lens antenna, fed by a circular waveguide with annular corrugations in the ground plane. The proposed leaky-wave feed reduces the impact of the spurious TM0 leaky-wave mode in all planes over a wide bandwidth while reducing assembly complexity compared to previous methods. The proposed leaky-wave antenna has an aperture efficiency above 80%, a return loss below -15 dB, and a cross-polarization level below -20 dB over a bandwidth from 110-220 GHz (2:1). We have fabricated and measured a WR-5 band (140-220 GHz) antenna prototype with a lens diameter of 3 cm that achieves excellent agreement between measurement and simulation in terms of return loss, directivity, and gain.

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