A new circuit topology for continuous group delay synthesis

Author

Fredrick, Jonathan D. ; Wang, Yuanxun ; Itoh, Tatsuo

Author_Institution

Microwave Electron. Lab., California Univ., Los Angeles, CA, USA

Volume

12

Issue

3

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

85

Lastpage

87

Abstract

A new circuit topology is realized in order to synthesize group delay continuously. The circuit is based upon a new variable coupling coefficient coupled line section and a microstrip feedback loop. The new variable coupler is designed by periodically loading an edge coupled microstrip coupler. With this new design, coupling variation of more than 10 dB may be achieved. To the best of the authors knowledge, this is the first report of this type of microstrip coupler. The complete circuit consumes no do power and exhibits more than 500 ps of continuous variable true time delay. Insertion loss is better than 3 dB and return loss is better than 15 dB.

Keywords

delay circuits; microstrip couplers; network topology; 15 dB; 3 dB; 500 ps; circuit topology; continuous group delay synthesis; coupling coefficient; edge coupling; feedback loop; insertion loss; periodic loading; return loss; true time delay; variable microstrip coupler; Capacitance; Circuit synthesis; Circuit topology; Coupling circuits; Delay effects; Delay lines; Diodes; Impedance; Microstrip; Varactors;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/7260.989859

Filename

989859