Open AccessGround plane modifications for design of miniaturised UWB antennas
Author(s) -
Koziel Slawomir,
Ul Haq Muhammad Aziz
Publication year - 2018
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.2017.1111
Subject(s) - ground plane , wideband , ultra wideband , antenna (radio) , computer science , acoustics , electronic engineering , mathematics , physics , engineering , telecommunications
This study investigates a particular type of ground plane modifications in ultra‐wideband (UWB) antennas and the effect they have on achievable amount of miniaturisation of the structure at hand. The focus is on n ‐section rectangular slits below the feeding line. The authors analyse possible size reduction as a function of the number n of slit sections. In order to ensure that the minimum antenna footprint is obtained in each case, rigorous numerical optimisation of all antenna parameters has been carried out. The optimisation process is constrained to guarantee that the antenna exhibits acceptable in‐band matching at the level of −10 dB. For the sake of generality, the study has been performed using a benchmark set of four representative UWB monopoles. The results clearly indicate a significant advantage of increasing the number of degrees of freedom of the ground plane slit but also the saturation effect, i.e. decreasing advantages of introducing additional slit sections beyond a certain value of n . The average amount of miniaturisation for n = 5 versus n = 1 is around 40%. For selected designs, numerical results have been validated experimentally.