Reduced branch-line coupler using eight two-step stubs

Author

Sakagami, I. ; Haga, M. ; Munehiro, T.

Author_Institution

Dept. of Electr. & Electron. Eng., Muroran Inst. of Technol., Hokkaido, Japan

Volume

146

Issue

6

fYear

1999

fDate

12/1/1999 12:00:00 AM

Firstpage

455

Lastpage

460

Abstract

A branch-line coupler with eight stubs is proposed for size reduction. A two-section stub consisting of high- and low-impedance transmission lines to make interconnection of low-impedance transmission lines easy is presented. According to the transmission-line theory. Almost the same frequency characteristics as those of a normal branch-line coupler can be obtained. Although there are slight differences in the high-frequency region over the centre frequency. The experimental circuit was reduced to 25% in area, and the frequency characteristics showed good agreement with the theoretical results except for the shift in centre frequency

Keywords

electric impedance; interconnections; transmission line theory; transmission lines; waveguide couplers; centre frequency; experimental circuit; frequency characteristics; high-frequency region; high-impedance transmission line; low-impedance transmission line; microwave integrated circuits; power divider/combiner; reduced branch-line coupler; size reduction; transmission line interconnection; transmission-line theory; two-section stub; two-step stubs;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19990785

Filename

817560