Abstract
This study presents design and analysis of a multi-band hybrid Z-shaped cylindrical dielectric resonator antenna (CDRA) with partial ground plane. The proposed antenna design consists of Z-shaped CDRA along with dual C-shaped patch. Dual C-shaped patch is used to excite TE 01δ mode, which also act as a radiator. Offset between upper and lower CDRAs is responsible for reduction in quality factor and also produce π /2 phase shift between the field lines of the proposed antenna which generates circular polarisation. The archetype of the proposed structure has been fabricated and practically validated. The proposed design operates in five frequency bands, i.e. 1.24-1.36 GHz, 2.56-2.88 GHz, 3.4-4.08 GHz, 5.08-5.72 GHz and 7.2-8.5 GHz with the fractional bandwidth of 9.23, 11.76, 18.18, 11.85 and 16.56%, respectively. Axial ratio bandwidth (AR <; 3 dB) for 7.85-8.35 GHz frequency band is 6.17%. The proposed antenna may be suitable for different wireless applications like WLAN (5.2 GHz), WiMAX (2.6/3.5/5.5 GHz) and satellite communication (7.9-8.39 GHz).
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