Title: Directivity tuning of microstrip couplers
Language: English
Authors: Müller, Johannes 
Pham, Minh Nhat 
Jacob, Arne F. 
Issue Date: Mar-2012
Source: 7th German Microwave Conference (GeMiC 2012)
Abstract (english): 
A method for tuning the directivity of directional couplers by simultaneously adjusting the phase velocity and the impedance level of the coupler is presented. It is shown that by using three symmetrically positioned capacitors, the solution of the compensation problem is under. Here, the additional degree of freedom is used to compensate the effect of typical manufacturing tolerances. A theory for the compensation with three capacitances is developed. Experimental proof is provided with a conventional mechanical tuning scheme. Measurement results show good performance, thus confirming the approach.
Conference: 7th German Microwave Conference, GeMiC 2012 
URI: http://hdl.handle.net/11420/8362
ISBN: 978-398126684-9
Institute: Hochfrequenztechnik E-3 
Document Type: Chapter/Article (Proceedings)
Project: Kompensation ungleicher Phasengeschwindigkeiten bei verkoppelten Leitungen in inhomogenen Medien - Phasengeschwindigkeiten 
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