Wideband circularly polarized hybrid dielectric resonator antenna with bi‐directional radiation characteristics for various wireless applications. Issue 9 (11th May 2019)

• Record Type: Journal Article
• Authors: Kumar, Rajkishor; Nasimuddin, ; Chaudhary, Raghvendra Kumar
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 29:Issue 9(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-05-11
• Subjects: bi‐directional radiation -- circularly polarized -- coplanar waveguide -- dielectric resonator antenna -- DR‐hybrid antenna -- slot antenna -- wideband; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21826
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: In this article, a wideband circularly polarized (CP) dielectric resonator (DR) over an asymmetric‐slot radiator based hybrid‐DR antenna is proposed with bi‐directional radiation characteristics. Bi‐directional CP radiation of the dual sense is obtained using a rectangular‐DR over asymmetric‐rectangular‐slot radiator with L‐shaped feed line. The asymmetric‐slot radiator feed by L‐shaped stub with the coplanar waveguide is used for generating two orthogonal modes, namely TE x δ 11 and TE y 1 δ 1 in the combined (rectangular‐DR and asymmetric‐slot radiator) hybrid‐DR antenna, which is verified by the distribution of electric field inside the rectangular DRA. The measured reflection coefficient bandwidth ( S 11 < −10 dB) and axial ratio (AR) bandwidth (AR < 3 dB) of the hybrid‐DR antenna are 80.5% (1.87‐4.39 GHz) and 43.8% (1.75‐2.73 GHz), respectively. The antenna radiation is in the broadside ( θ = 0°, ϕ = 0°) direction as well as in the backside ( θ = 180°, φ = 0°) direction with equal magnitudes in both the directions. Right‐handed and left‐handed CP waves are achieved respectively, in the boresight ( +Z ) and the backside ( −Z ) directions. The proposed CP hybrid‐DR antenna gives an average gain of 3.55 dBic and radiation efficiency of 95.0% in both directions. The proposed antenna covers various wireless useful bands such as ISM 2400 band, Wi‐Fi, Bluetooth, and Wi‐MAX (2.5‐2.7 GHz).