A 24 GHz microstrip antenna array with a non-radiative dielectric waveguide (NRD-guide) feeding network

Abstract

A major restriction of high gain microstrip antenna arrays is found in their high losses, mainly due to the feeding network. In this contribution, design and results of a 24GHz microstrip array antenna with low loss, low cost and low profile NRD-guide feeding network are presented. Interconects between planar structures and NRD-guide feeding network are done by slot coupling. The feeding network for this antenna was implemented as NRD-guides, but in a later phase, it might be implemented as substrate integrated (SI) NRD-guides [1] with even lower production cost.