DocumentCode :
1520745
Title :
Wideband 3 dB Branch Line Coupler Based on 
Open Circuited Coupled Lines
Author :
Arriola, Werner A. ; Lee, Jae Young ; Kim, Ihn Seok
Author_Institution :
Dept. of Electron. & Radio Eng., Kyung Hee Univ., Seoul, South Korea
Volume :
21
Issue :
9
fYear :
2011
Firstpage :
486
Lastpage :
488
Abstract :
This letter introduces a new 3 dB branch line coupler for wideband applications. The wideband matching property of the coupler with four λ/4 open circuited coupled lines is briefly derived. The coupler with a suspended microstrip and microstrip line structures has been simulated with HFSS and fabricated. Measurement results show insertion loss better than 3.6 dB with a power imbalance of 0.5 dB; return loss and isolation characteristics both better than 20 dB over 49% fractional bandwidth.
Keywords :
band-pass filters; impedance matching; microstrip couplers; transmission line theory; λ-4 open circuited coupled lines; band pass filter; fractional bandwidth; insertion loss; microstrip; microstrip line structures; wideband 3 dB branch line coupler; Broadband communication; Couplers; Couplings; Impedance; Microstrip; Wideband; $lambda/4$
fLanguage :
English
Journal_Title :
Microwave and Wireless Components Letters, IEEE
Publisher :
ieee
ISSN :
1531-1309
Type :
jour
DOI :
10.1109/LMWC.2011.2138687
Filename :
5771073
Link To Document :
