A broadband 180 degrees hybrid ring coupler using a microstrip-to-slotline inverter

摘要

A broadband 180 degrees 3-dB hybrid coupler with over 118% bandwidth. Excellent agreement between simulated and experimental results was achieved. The coupler requires simple manufacturing techniques and a single layer substrate. (c) 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:2164-2168, 2015