A new coupling network topology for mm-Wave biomimetic antenna arrays

Abstract

Biomimetic antenna arrays (BMAAs) are used to improve the angle estimation capabilities of compact antenna systems by mimicking the hearing system of an insect. The key component of the antenna system is the biomimetic coupling network. Recent works propose the use of transformers for this purpose, but these are difficult to realize especially in the mm-wave range. In this paper, a new topology for the biomimetic coupling network based on rat-race couplers is proposed and a straightforward design process is given. A prototype antenna is designed, fabricated, and measured showing an excellent match between theory and measurement.