Title :
A reduced branch-line coupler with eight stubs
Author :
Sakagami, Iwata ; Teraoka, Ryo ; Munehiro, Takatsugu
Author_Institution :
Muroran Inst. of Technol., Japan
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;
Conference_Titel :
Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific
Print_ISBN :
962-442-117-X
DOI :
10.1109/APMC.1997.656426
