Efficient Waveguide Feeds for Low-Profile Submm-wave Lens Antennas

Conference paper (2022)

Authors

S. van Berkel California Institute of Technology
M. Alonso Del Pino Tera-Hertz Sensing - EEMCS
Cecile Jung-Kubiak California Institute of Technology
Goutam Chattopadhyay California Institute of Technology
Research Group
Tera-Hertz Sensing (EEMCS) (TU Delft)
Copyright: © 2022 Sven van Berkel, M. Alonso Del Pino, Cecile Jung-Kubiak, Goutam Chattopadhyay
DOI: https://doi.org/10.1109/IRMMW-THz50927.2022.9895505
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Published Date

2022

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Tera-Hertz Sensing

Abstract

A small volume and low-mass THz spectroscopy instrument, integrated in a CubeSat platform, enables an accessible and low-cost pathway to earth science. Low-profile lens antennas emerge as a suitable candidate to realize a high gain, 50 dB, over a wide bandwidth, from 450 GHz to 550 GHz. To achieve a high aperture efficiency with a large numerical aperture lens, an advanced waveguide feed is required. In this work a concentric corrugated waveguide feed and multi-layer leaky-wave feed are presented and benchmarked against an open-ended circular waveguide feed. All three feeds are fabricated and will be evaluated in combination with a 7.4 cm diameter silicon lens. It is shown that the two feeds result in a 65% aperture efficiency, i.e. a 13% improvement with respect to the open-ended waveguide.

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