Advanced characterization and design of compensated high directivity quadrature coupler

Author

Müller, Johannes ; Jacob, Arne F.

Author_Institution

Inst. fur Hochfrequenztech., Techn. Univ. Hamburg-Harburg, Hamburg, Germany

fYear

2010

fDate

23-28 May 2010

Firstpage

724

Lastpage

727

Abstract

An efficient design procedure for directional couplers based on the effective even and odd mode characteristic impedances and electrical lengths is presented. These quantities which are extracted from the scattering parameters of the overall coupler structure allow for a systematic optimization. This is useful, for instance, when designing compensated high directivity couplers or when large bandwidth performance is desired. The method is applied to optimize a 2 GHz wiggly line coupler. Measurements yield a directivity of better than 30 dB from DC to 3.5 GHz, confirming the simulation results.

Keywords

S-parameters; directional couplers; compensated high directivity quadrature coupler; design procedure; directional couplers; frequency 2 GHz; frequency 3.5 GHz; odd mode characteristic; scattering parameters; Bandwidth; Coupling circuits; Dielectric substrates; Directional couplers; Frequency; Impedance; Jacobian matrices; Matched filters; Network synthesis; Scattering parameters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International

Conference_Location

Anaheim, CA

ISSN

0149-645X

Print_ISBN

978-1-4244-6056-4

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2010.5517872

Filename

5517872