Stepped impedance microstrip couplers with improved directivity

Publikationstyp
Conference Paper
Date Issued
2009-06
Sprache
English
Author(s)
Müller, Johannes  
Friesicke, Christian  
Jacob, Arne F.  
Institut
Hochfrequenztechnik E-3  
TORE-URI
http://hdl.handle.net/11420/8453
Journal
IEEE MTT-S International Microwave Symposium digest  
Volume
2009
Start Page
621
End Page
624
Article Number
5165773
Citation
IEEE MTT-S International Microwave Symposium Digest (2009): 5165773 621-624 (2009)
Contribution to Conference
IEEE MTT-S International Microwave Symposium (IMS) 2009  
Publisher DOI
10.1109/MWSYM.2009.5165773
Scopus ID
2-s2.0-77950017714
Publisher
IEEE
This paper presents the design of microstrip couplers with improved directivity. In order to compensate for the unequal phase velocities of even- and odd-mode in inhomogeneous media, the coupler is subdivided into multiple sections. It is shown that by properly choosing the lengths, the impedances, and the coupling coefficients of the corresponding sections, the coupler's directivity can be optimized. The design procedures can easily be applied using commercially available simulation software. Measurements confirm the design methodology and show good agreement with the simulation results.
Subjects
Couplers
Directivity
Inhomogeneous media
Microstrip
Phase velocity compensation
Stepped impedance
DDC Class
600: Technik
620: Ingenieurwissenschaften