Open AccessStructure and EM‐driven design of novel compact UWB slot antenna
Author(s) -
Bekasiewicz Adrian,
Koziel Slawomir
Publication year - 2017
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2016.0467
Subject(s) - antenna (radio) , computer science , electronic engineering , reduction (mathematics) , footprint , radiation pattern , reflection (computer programming) , impedance matching , antenna tuner , reflection coefficient , electrical impedance , antenna efficiency , acoustics , engineering , electrical engineering , telecommunications , physics , mathematics , paleontology , geometry , biology , programming language
In this study, a structure and design optimisation procedure of a novel compact ultra‐wideband (UWB) slot antenna has been presented. In order to achieve small size of the structure and maintain acceptable electrical performance, a sufficiently large number of geometry parameters have been introduced. These include a stepped‐impedance feed line and a meandered slot with all of dimensions being parameterised and subject to optimisation. All parameters are simultaneously adjusted using automated electromagnetic (EM)‐simulation‐driven optimisation algorithm. The design process is oriented towards explicit size reduction of the antenna structure. Penalty function approach is utilised to control the reflection response. In order to reduce the computational cost of the optimisation process, variable‐fidelity EM models are utilised. The footprint of the optimised antenna is only 8.93 × 17.9 mm (160 mm 2 ) while maintaining reflection below the –10 dB threshold in the entire UWB frequency range. The antenna has been favourably compared with the state‐of‐the‐art compact structures in terms of the size. The obtained numerical results are supported by measurements of the fabricated antenna prototype.