Staff Members - Benha University
Compact Cascaded Branch Line Coupler using T-Sections Conversion
2017, 34th NATIONAL RADIO SCIENCE CONFERENCE (NRSC 2017), March 13‐16, 2017, Port Said, Egypt Arab Academy for Science, Technology & Maritime Transpt. • 2017
Publication Information
Authors
Hesham. A. Mohamed and Ashraf S. Mohra
Keywords
Branch line coupler, T- section, small size
Journal
2017, 34th NATIONAL RADIO SCIENCE CONFERENCE (NRSC 2017), March 13‐16, 2017, Port Said, Egypt Arab Academy for Science, Technology & Maritime Transpt.
Publisher
Not Available
Volume
1
Issue
1
Pages
Not Available
publication.type
Local
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
The branch line coupler has many applications such as phase shifters, vector modulators, amplifiers and mixers
and etc. The conventional branch line coupler consists of four arms each have λ/4 length with different impedances.
To broaden the bandwidth, the couplers need to be cascaded, but due to the cascading, the overall size will be very
large. To minimize the overall size, a T-section conversion was used instead of each of the quarter wave length
arms. The new cascaded coupler occupies 33.5% of the area needed for the conventional cascaded coupler. Added
to the size reduction, the new cascaded branch line coupler has nearly the same frequency response and fractional
bandwidth as the conventional cascaded branch line coupler.
and etc. The conventional branch line coupler consists of four arms each have λ/4 length with different impedances.
To broaden the bandwidth, the couplers need to be cascaded, but due to the cascading, the overall size will be very
large. To minimize the overall size, a T-section conversion was used instead of each of the quarter wave length
arms. The new cascaded coupler occupies 33.5% of the area needed for the conventional cascaded coupler. Added
to the size reduction, the new cascaded branch line coupler has nearly the same frequency response and fractional
bandwidth as the conventional cascaded branch line coupler.