Simplified design technique for high performance microstrip multi-section couplers

Abstract

A new design technique has been developed which improves the design of microstrip multi-section coupler by a simplified version of the non-uniform coupler method. The design is further improved by the use of the "s,aw-tooth" odd and even mode equalisation technique. The measured results demonstrate an irnproved performance over the multi-section coupler in terms of coupling performance and bandwidth, whilst the size and the fabrication tolerarice are better than the nonuniform line coupler.

Reflective phase shifter based on wideband multi‐section hybrid coupler in slot‐coupled structure

“…By using coupled microstrip lines in Lange or tandem coupler configurations , tight coupling can be achieved. Although multi‐section directional couplers are used for phase velocity equalization. In Ref.…”