Broadband Directional Coupler with High Coupling Attenuation
Conference: GeMiC 2014 - German Microwave Conference
03/10/2014 - 03/12/2014 at Aachen, Germany
Proceedings: ITG-Fb. 246: GeMiC 2014
Pages: 3Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
Fackelmeier, A.; Huber, K. (Siemens AG, Corporate Technology, Erlangen, Germany)
Pott, S. (Siemens AG, Healthcare, Erlangen, Germany)
We present a high-power directional coupler for precise amplitude and phase measuring of broadband highfrequency signals. In contrast to conventional directional couplers, a significantly higher attenuation of the coupled forward signal can be achieved with the same high directivity. This results from a new ring coupling structure which corresponds to an almost lossless serial connection of directional couplers. The higher coupling attenuation allows developing directional couplers with strongly reduced losses and thus a smaller design because no heat sink is required. A realization of a micro strip based coupled line coupler with the ring design is shown.