Design and Characterization of Series and Corporate Feed Differential Arrays for Broadband 60 GHz Radar Applications

Abstract

This paper provides a comparison between differential broadband series-fed and corporate-fed 4-element arrays at 60 GHz band to equip multi-channel radar. Radiator lengths are perturbed in the series-fed array to widen the bandwidth, while parasitic structures are inserted in the corporate-fed array. Measurement showed beam squinting from 3 degrees to 15 degrees over 61-66 GHz and narrow beam width for the compact series-fed array, while the large corporate-fed array has fixed beam direction but wider beam width. This opens the possibility of inherent beam steering by series-fed arrays for radar applications.