Háskólinn í ReykjavíkReykjavik UniversityBekasiewicz, AdrianKoziel, Slawomir2018-09-142018-09-142016-12-01Koziel, S., & Bekasiewicz, A. (2016). A Novel Structure and Design Optimization of Compact Spline-Parameterized UWB Slot Antenna, Metrology and Measurement Systems, 23(4), 637-643. doi: https://doi.org/10.1515/mms-2016-00542300-1941 (eISSN)0860-8229https://hdl.handle.net/20.500.11815/839In this paper, a novel structure of a compact UWB slot antenna and its design optimization procedure has been presented. In order to achieve a sufficient number of degrees of freedom necessary to obtain a considerable size reduction rate, the slot is parameterized using spline curves. All antenna dimensions are simultaneously adjusted using numerical optimization procedures. The fundamental bottleneck here is a high cost of the electromagnetic (EM) simulation model of the structure that includes (for reliability) an SMA connector. Another problem is a large number of geometry parameters (nineteen). For the sake of computational efficiency, the optimization process is therefore performed using variable-fidelity EM simulations and surrogate-assisted algorithms. The optimization process is oriented towards explicit reduction of the antenna size and leads to a compact footprint of 199 mm2 as well as acceptable matching within the entire UWB band. The simulation results are validated using physical measurements of the fabricated antenna prototype.637-643eninfo:eu-repo/semantics/openAccessComputational efficiencyComputer aided designSlot antennasDegrees of freedom (mechanics)Structural optimizationSkilvirkniTölvustudd hönnunLoftnetVerkfræðiUltra Wideband (UWB)info:eu-repo/semantics/articleMetrology and Measurement Systems10.1515/mms-2016-0054