Comments on "Compact Dual-Band Branch-Line Coupler With Dual Transmission Lines"

The synthesis and design method for the dual-band, dual transmission line branch-line coupler in [1] involves equivalent circuit transformations that are single-banded in nature and not suitable for the dual-band operations. The proposed equivalent dual transmission line transform has been applied o...

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Bibliographic Details
Published in:IEEE microwave and wireless components letters 2017-01, Vol.27 (1), p.103-104
Main Author: Park, Myun-Joo
Format: Article
Language:English
Subjects:
Admittance
Branch-line coupler
Circuit design
Couplers
Dual band
dual transmission lines
Electric power lines
Equivalent circuits
Power transmission lines
Resonant frequency
Transforms
Transmission lines
Wireless communication
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Description
Summary:The synthesis and design method for the dual-band, dual transmission line branch-line coupler in [1] involves equivalent circuit transformations that are single-banded in nature and not suitable for the dual-band operations. The proposed equivalent dual transmission line transform has been applied only in the middle of the dual-band operation frequencies and its validity has not been confirmed at the two band frequencies. As the result, the proposed circuit equivalence can be quite poor and the coupler design in [1] based on it can be quite erroneous at the dual-band operation frequencies.
ISSN:1531-1309
2771-957X
1558-1764
2771-9588
DOI:10.1109/LMWC.2016.2629986