A reduced branch-line coupler with eight stubs

Author

Sakagami, Iwata ; Teraoka, Ryo ; Munehiro, Takatsugu

Author_Institution

Muroran Inst. of Technol., Japan

Volume

3

fYear

1997

fDate

2-5 Dec 1997

Firstpage

1137

Abstract

A branch-line coupler using eight stubs is proposed for size reduction. As for the stubs, a structure consisting of two sections of high and low impedance transmission lines is presented in order to connect a low impedance stub to a signal line. According to transmission line theory, no practical differences are found in the frequency characteristics between the normal hybrid and an experimental circuit, except for slight differences in higher frequency region over the center frequency. The experimental circuit was reduced to 25% in area, and showed good agreement with theory

Keywords

equivalent circuits; microwave integrated circuits; strip line couplers; transmission line theory; MIC application; branch-line coupler; frequency characteristics; high impedance transmission lines; low impedance transmission lines; size reduction; stubs; transmission line theory; Coupling circuits; Distributed parameter circuits; Frequency; Impedance; Microwave integrated circuits; Microwave technology; Microwave theory and techniques; National electric code; Power transmission lines; Transmission line theory;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific

Print_ISBN

962-442-117-X

Type

conf

DOI

10.1109/APMC.1997.656426

Filename

656426