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Novel structure and design of enhanced‐bandwidth hybrid quadrature patch coupler
Author(s) -
Bekasiewicz Adrian,
Koziel Slawomir
Publication year - 2018
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31426
Subject(s) - parameterized complexity , bandwidth (computing) , hybrid coupler , spline (mechanical) , computer science , quadrature (astronomy) , control point , control theory (sociology) , topology (electrical circuits) , electronic engineering , mathematics , algorithm , power dividers and directional couplers , engineering , control (management) , telecommunications , structural engineering , combinatorics , artificial intelligence , computer vision
A novel structure and design optimization procedure of an enhanced‐bandwidth hybrid quadrature patch coupler is proposed. Improved performance of the circuit has been obtained by parameterizing the coupler sections using splines, which introduces additional degrees of freedom. Due to computational complexity of the parameter adjustment problem, a sequential design procedure is applied. In each iteration, a selected number of spline control points is used and their radial coordinates are optimized. The design found this way is then used as a starting point for the next iteration with an increased number of spline control points. The final design parameterized by 20 control points exhibits over 50% bandwidth at the operational frequency of 10 GHz, and acceptable footprint of 13.8 mm × 15.7 mm.