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A Compact In-Line Waveguide-to-Microstrip Transition in the Q-Band for Radio Astronomy Applications

Department of Electrical and Electronic Engineering, University of Cagliari, Piazza D’Armi, 09123 Cagliari, Italy
Italian Space Agency, 00133 Rome, Italy
Author to whom correspondence should be addressed.
Electronics 2018, 7(2), 24;
Received: 5 January 2018 / Revised: 13 February 2018 / Accepted: 16 February 2018 / Published: 24 February 2018
PDF [1731 KB, uploaded 24 February 2018]


A microstrip-to-waveguide transition has been realized for radio astronomy applications, designed to operate in the Q-band (33–50 GHz). As part of an array radio frequency (RF) receiver, the main requirement of such a transition is the reduction of transverse space occupation for the integration in the entire receiver chain, so an in-line configuration has been developed. Moreover, the high frequency band implies that an easy fabrication is a critical requirement if a good match between the two guiding structures is to be obtained in the desired band (with a relative bandwidth of 40%). The combination of CAD software and an optimization tool allows the device to achieve a good return loss over the entire band. View Full-Text
Keywords: transition; end-launcher; waveguide; microstrip; optimization; PSO transition; end-launcher; waveguide; microstrip; optimization; PSO

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Simone, M.; Fanti, A.; Valente, G.; Montisci, G.; Ghiani, R.; Mazzarella, G. A Compact In-Line Waveguide-to-Microstrip Transition in the Q-Band for Radio Astronomy Applications. Electronics 2018, 7, 24.

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