Desfasador diferencial 90º compacto de banda ancha en guía de onda

Abstract

A compact differential phase shifter structure that exhibits a full-band operation and easy mechanical manufacture is presented. It consists of a rectangular waveguide loaded with continuous senoidal ridge section and corrugations. A prototype of 90º differential phase shifter with reference to an empty waveguide of the same length was designed and tested for the WR22 waveguide band. Moreover, manufacturing tolerances have been taken into account in order to analyse the impact in the electrical performance. The differential phase shifter reveals an excellent behaviour with an average phase shift of 88º ± 3°, return losses better than 20 dB and insertion losses better than 0,1 dB over a 50% bandwidth (30-50 GHz).