Híbrido 180º de banda ancha en tecnología uniplanar para ondas milimétricas

Abstract

This document presents the design, simulation and characterization of a hybrid-ring coupler using uniplanar technology, developed at millimetre-wave frequencies. The hybrid-ring coupler is designed using a combination of coplanar waveguide (CPW) and slotline transmission lines in order to achieve the phase difference response between the transmitted and coupled ports. The use of uniplanar technology makes a straightforward and fast implementation, and also offers an easy integration with other MIC or MMIC applications. The circuit is optimized to get the best phase results by tuning the slotline branch of the ring. Circuit characterization shows a wideband frequency response, around 17 GHz, in terms of phase difference (180º±5º) working up to 40 GHz.