The design of an ultra-wideband directional coupler

Abstract

Couplers are widely used in microwave circuits, and the influence of its capability can not be ignored for the capability of the whole circuit. It is very important to make an ultra-wideband coupler with high performance. According to the special request of the task, a method for designing ultra-wideband(UWB) symmetric multi-section directional coupler is presented in this paper. After a series of analyses and simulations, a satisfying result is finally found out in the broadband 3-12GHz. And the measurement data is good consistent with simulation result.