A compact wideband series linear dielectric resonator array antenna

Abstract

: This communication presents a miniaturised series linear wideband array of notched rectangular dielectricresonator antennas that operate in the band IEEE 802.11a. Three dielectric resonators (DRs) were excited through theaperture slots coupled with a microstrip feed. To improve the array gain, the aperture slots were placed based on theattributes related to the standing-wave ratio on a short-ended microstrip feeder to obtain optimal joint power for theDRs, while the bandwidth was improved using the notched rectangular DRs. An equivalent impedance model of theproposed array was postulated to provide physical insight into the array resonance behaviour. The impedance model wassimulated using the Agilent Advanced Design System software and optimised to determine the DRs’ dimensions. Thenthe array prototype was simulated and experimentally implemented. The maximum measured gain across a 1.68-GHzbandwidth was found to be 8.28 dBi. The antenna structure measured approximately 60 × 40mm, thereby making it agood component for wireless communication systems.