Novel broadband nonreciprocal 180° phase-shifter

Abstract

In this contribution, a novel broadband 180° phase shifter, realized in 0.5 μm GaN HEMT technology developed by SELEX Sistemi Integrati, is presented. This new topology is based on the combination of two directive three-port elements with a four-port phase-shifting network: the proposed MMIC is featured by an average zero insertion loss, 180°±2° differential phase-shift and good port matching over the 3–7GHz operating bandwidth. The MMIC size is 3.5×3.4 mm2.