Broadband coplanar waveguide-coplanar strip-fed spiral antenna

Abstract
A novel broadband coaxial-coplanar waveguide-coplanar strip-fed spiral antenna is presented. The antenna has good radiation patterns and a return loss of better than 10 dB over a wide bandwidth from 0.4 to 3.6 GHz. A DC–3.7 GHz broadband balun was developed for the antenna feed.

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