Sum-difference circuits using 0 dB and -3 dB co-directional couplers for hybrid microwave and MIMIC circuit applications

Author

Uysal, S. ; Watkins, J. ; Turner, C.W.

Author_Institution

Dept. of Electr. & Electron. Eng., Kings Coll., London Univ., UK

fYear

1992

fDate

1-5 June 1992

Firstpage

937

Abstract

A new design approach for microstrip sum-difference ( Sigma - Delta ) Magic-T circuits is described. The technique employs entirely planar 0-dB and -3-dB codirectional quadrature couplers. A 17% bandwidth was demonstrated at the X-band from a Magic-T circuit built on a 1-in/sup 2/ alumina substrate. Multioctave 0-dB coupling is also illustrated by a computed example. Any other coupling level can be derived directly from the 0-dB codirectional coupler, thereby simplifying mask layout and significantly reducing design time. Accurate design curves for codirectional couplers on alumina substrate are given.<>

Keywords

directional couplers; hybrid integrated circuits; microstrip components; microwave integrated circuits; 8 to 12 GHz; Al/sub 2/O/sub 3/ substrate; MIMIC circuit; X-band; bandwidth; codirectional quadrature couplers; design curves; hybrid microwave circuits; mask layout; microstrip sum difference Magic-T circuits; multioctave coupling; Bandwidth; Couplers; Coupling circuits; Directive antennas; Educational institutions; Electromagnetic modeling; Microstrip; Microwave circuits; Phased arrays; Scattering parameters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1992., IEEE MTT-S International

Conference_Location

Albuquerque, NM, USA

ISSN

0149-645X

Print_ISBN

0-7803-0611-2

Type

conf

DOI

10.1109/MWSYM.1992.188143

Filename

188143