Wideband Two-Section Branch-Line Coupler Using Microstrip Technique

Document Type : Original Article

Authors

dept. of electronics and communication engineering faculty of electronic engineering menofia university Menouf, Egypt

Abstract

This paper introduces a compact quadrature hybrid coupler for wideband applications. Using the conventional technique of cascading two sections in
a quadrature hybrid we designed a broadband coupler at
a central frequency of 1.8 GHz. To improve the performance of this coupler and to reduce its size we used the artificial transmission line concept, microstrip line loaded with shunt open ended stubs, and meandering lines. A size reduction of about 31% was achieved compared to the conventional one. The proposed design has a relative bandwidth of 33.3 %, and return loss and isolation loss are both better than 18 dB on the entire band. The proposed coupler has been simulated using the CST Studio suite, fabricated, and measured. A good agreement has been obtained between the simulated and measured results.

Keywords

References

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Menoufia Journal of Electronic Engineering Research
Volume 28, ICEEM2019-Special Issue
ICEEM2019-Special Issue: 1st International Conference on Electronic Eng., Faculty of Electronic Eng., Menouf, Egypt, 7-8 Dec.
2019
Pages 189-193

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