Tunable Directional Coupler

Thomas Zelder, Elena Vallés Lluch, Bernd Geck, Ilona Rolfes, Hermann Eul

German Microwave Conference (GeMiC 2008), pp. 1-4, Hamburg, March 10-12, 2008


In many applications a directional coupler with a high directivity is needed. Therefore, a tunable directional coupler will be presented in this paper. The tunable coupler consists of a conventional directional coupler and a tuning network. By tuning the network, it is possible to increase the directivity of the conventional coupler. The tuning network can either be realized in software or hardware. In this paper the theoretical derivation and an example for a practical realization of the tunable coupler will be presented.

[IEEE Library]