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Simulation‐based optimization for rigorous assessment of ground plane modifications in compact UWB antenna design
Author(s) -
Haq Muhammad Aziz Ul,
Koziel Slawomir
Publication year - 2018
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21204
Subject(s) - ground plane , miniaturization , antenna (radio) , benchmark (surveying) , computer science , electronic engineering , plane (geometry) , range (aeronautics) , acoustics , topology (electrical circuits) , engineering , physics , telecommunications , mathematics , electrical engineering , geometry , aerospace engineering , geodesy , geography
Abstract Introducing ground plane modifications is a popular approach in the design of compact UWB antennas. Yet, specific topological alterations are normally reported on case to case basis without thorough investigations concerning their general suitability for antenna miniaturization. In particular, detailed performance comparison of different ground plane modifications is lacking in the literature. In this article, the effect of selected ground plane modifications on achievable miniaturization rate is considered based on a set of four UWB antennas. EM‐driven optimization is carried out to minimize the antenna footprints while maintaining acceptable matching within the UWB frequency range. In each case, all geometry parameters of the respective structures are utilized in the design process. For the sake of fair comparison, all antennas are implemented on the same dielectric substrate. Our results indicate a clear performance pattern, here, an advantage of the elliptical ground plane slit below the feed line over the rectangular one (average size reduction ratio of 26% versus 19% across the benchmark set). Our conjectures are confirmed by physical measurements of the fabricated antenna prototypes.