A high-directivity microstrip directional coupler with feedback compensation

Author

Jia-Liang Chen ; Sheng-Fuh Chang ; Chain-Tin Wu

Author_Institution

Dept. of Electr. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan

Volume

1

fYear

2002

fDate

2-7 June 2002

Firstpage

101

Abstract

A new directivity-enhancement method for a microstrip directional coupler is presented. The method utilizes feedback elements between the collinear ports of the parallel-line coupler to generate an isolation zero at the desired frequency. The closed-form equations for designing such compensating elements are developed. Experiments are conducted to verify the proposed method. More than 30 dB directivity improvement is achieved, compared to the conventional microstrip parallel coupler.

Keywords

circuit simulation; circuit testing; compensation; feedback; microstrip directional couplers; network synthesis; closed-form equations; collinear ports; compensating elements design; directivity-enhancement method; feedback compensation; feedback elements; high-directivity microstrip directional coupler; isolation zero; microstrip directional coupler; microstrip parallel coupler; parallel line coupler; Circuit simulation; Coupling circuits; Directional couplers; Feedback; Frequency; Inductance; Inductors; Microstrip; Microwave Theory and Techniques Society; Transmission line matrix methods;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2002 IEEE MTT-S International

Conference_Location

Seattle, WA, USA

ISSN

0149-645X

Print_ISBN

0-7803-7239-5

Type

conf

DOI

10.1109/MWSYM.2002.1011569

Filename

1011569