Compact dual polarised CDRA with stimulation of triple radiating mode

Abstract

ABSTRACTIn this communication, compact cylindrical dielectric resonator antenna (CDRA) is designed and examined with diversified polarisation features in twofold frequency ranges. Three significant features of proposed CDRA are: (i) modified circular shaped aperture is used to stimulate the CDRA, which helps to excite triple radiating modes inside it i.e. HEM11δ, HEM12δ, HEM13δ; (ii) proposed CDRA supports two different polarisation features i.e. Linear as well as circular; (iii) modified circular aperture makes the CDRA electrically compact approximately by 14%. Fabricated prototype of proposed CDRA is used to practically authenticate the results. After measurement, it approves that the proposed CDRA is working in twofold frequency bands i.e. 4.83–6.82 GHz and 7.05–7.52 GHz with the percentage bandwidth of 34.19 and 6.45%, respectively. Experimental results also approve that the proposed CDRA support circularly polarised waves during frequency range 5.65–6.25 and 7.2–7.52 GHz, respectively. Stable far-field results confirm its suitability for WLAN (5.0 GHz) and X-band downlink satellite communication band (7.0 GHz).