A novel compact dual-band branch-line coupler

Author

Lin, Feng ; Chu, Qing-Xin

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

2595

Lastpage

2597

Abstract

A novel compact dual-band branch-line coupler is proposed, which consists of four E-shaped dual-band transmission lines. The even-odd mode method is adopted to obtain the input admittance of the E-shaped transmission line. Letting the admittance matrix of the E-shaped transmission line and the conventional quarter-wavelength transmission line be identical in two frequencies, then the dual-band coupler is obtained. For verification, a 3-dB microstrip coupler operating at 900 and 2000 MHz is fabricated and measured. Simulated and measured results are in good agreement.

Keywords

UHF couplers; microstrip couplers; E-shaped dual-band transmission lines; admittance matrix; compact dual-band branch-line coupler; conventional quarter-wavelength transmission line; even-odd mode method; frequency 2000 MHz; frequency 900 MHz; microstrip coupler; Admittance; Coupling circuits; Dual band; Equations; Frequency; Impedance; Microstrip; Phase transformers; Transmission line matrix methods; Transmission lines; Couplers; compact; dual-band;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. APMC 2009. Asia Pacific

Conference_Location

Singapore

Print_ISBN

978-1-4244-2801-4

Electronic_ISBN

978-1-4244-2802-1

Type

conf

DOI

10.1109/APMC.2009.5385240

Filename

5385240