Branch-Line Coupler Design Operating in Four Arbitrary Frequencies
Journal article, 2012

This letter presents a successful design approach for a branch-line coupler operating in four arbitrary frequencies. An optimized compensation technique is adopted to fulfill satisfactory matching, transmission and isolation properties within each operating band. Based on the simple planar microstrip technology, the proposed quad-band coupler has been realized and tested. A return loss better than 16 dB, together with an amplitude imbalance limited to 0.3 dB and an isolation higher than 17.5 dB, have been experimentally measured on each operating band, validating the proposed design methodology.

branch-line

quad-band

dual-band

Balanced

passive

multi-band

coupler

Author

L. Piazzon

University of Rome Tor Vergata

Paul Saad

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

P. Colantonio

University of Rome Tor Vergata

F. Giannini

University of Rome Tor Vergata

Kristoffer Andersson

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

IEEE Microwave and Wireless Components Letters

1531-1309 (ISSN)

Vol. 22 2 67-69

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/LMWC.2011.2181349

More information

Latest update

3/29/2018