Design of Planar Directional Coupler using 2-Bit Fragment Structures

Automatic design of planar directional coupler can be implemented by multi-objective optimization searching for the optimal planar fragment-type structure (FTS). The 2-bit FTS description scheme may include necessary fine structures in fragments to enhance the FTS design. By coding the coupler desig...

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Bibliographic Details
Published in:Applied Computational Electromagnetics Society journal 2021-12, Vol.36 (12), p.1610
Main Authors: Tao, Yonghui, Zhang, Wenjuan, Sidén, Johan, Wang, Gang
Format: Article
Language:English
Subjects:
Bandwidths
Design
directional coupler
Directional couplers
Directivity
fragment-type
modeling
Multiple objective analysis
Optimization
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Description
Summary:Automatic design of planar directional coupler can be implemented by multi-objective optimization searching for the optimal planar fragment-type structure (FTS). The 2-bit FTS description scheme may include necessary fine structures in fragments to enhance the FTS design. By coding the coupler design space on PCB in 2-bit FTS, defining the FTS design matrix, and searching for the optimal structure, directional coupler can be designed without any structure presetting or artificial intervention. The scheme is demonstrated by designing 10-dB wideband directional coupler with 2-bit FTS scheme. The designed directional couplers are fabricated and tested to show maximum directivity of 58 dB with 36% operation bandwidth.
ISSN:1054-4887
1943-5711
DOI:10.13052/2021.ACES.J.361213