Design of compact triple-band branch-line coupler with three arbitrary operating frequencies

Author

Lin, Yuan-Li ; Huang, Ting-Yi ; Shen, Tze-Min ; Chen, Chien-Chia ; Wu, Ruey-Beei

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

fYear

2011

Firstpage

25

Lastpage

28

Abstract

This paper proposes a triple-band branch-line coupler design by substituting the λ/4 transmission lines in the conventional branch-line coupler by II-shaped circuits composing of transmission lines, LC resonators and open stubs. The coupler is designed on a printed circuit board (PCB). Surface mount device (SMD) capacitors are used for the LC shunt resonators. The operated frequencies of this coupler are designed at the 0.9 GHz, 1.575 GHz, and 1.8 GHz. Simulated and measured results by full-wave simulators validate the design concept.

Keywords

UHF couplers; UHF resonators; capacitors; printed circuits; surface mount technology; transmission lines; II-shaped circuits; LC shunt resonators; compact triple-band branch-line coupler; frequency 0.9 GHz; frequency 1.575 GHz; frequency 1.8 GHz; full-wave simulators; open stubs; printed circuit board; surface mount device capacitors; three arbitrary operating frequencies; transmission lines; Bandwidth; Couplers; Dual band; Impedance; Resonant frequency; Shunt (electrical); Transmission line measurements; SMD; branch-line coupler; triple-band;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2011 Asia-Pacific

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4577-2034-5

Type

conf

Filename

6173676