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Reliable assessment of topological modifications in UWB antennas by means of multi‐objective optimization
Author(s) -
Bekasiewicz Adrian,
Koziel Slawomir
Publication year - 2017
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.30571
Subject(s) - antenna (radio) , topology (electrical circuits) , computer science , electronic engineering , multi objective optimization , identification (biology) , set (abstract data type) , engineering , telecommunications , electrical engineering , machine learning , botany , biology , programming language
In this letter, the problem of systematic and rigorous assessment of effects of topological modifications on the performance of miniaturized UWB antennas has been addressed. The primary assessment tool is fast multi‐objective optimization, here, realized using a recent sequential domain patching algorithm. Identification of the Pareto front for an antenna structure, ie, the set of designs representing the best possible tradeoffs between conflicting objectives (here, reflection characteristic and the antenna footprint) allows for conclusive comparison of antenna performance and suitability for space‐limited applications. Here, we are interested in the effect of seemingly small topological modifications, the importance of which cannot be detected using parameters sweeps because of heavy interactions between such modifications and the remaining parameters of the structure. An UWB monopole case study demonstrates that small topological amendments may lead to considerable improvement of antenna performance and reduction of its size. Numerical results are supported by experimental validation of the fabricated antenna prototypes.