Title :
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
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;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
