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In present work a wide band and high gain cylindrical dielectric resonator antenna working in X-band has been designed and validated experimentally. First the bandwidth of the antenna has been enhanced by placing the thin dielectric layer between antenna and feed network. Next gain of the antenna has been increased by placing a layer of high dielectric material at nearly λ/2 distance as superstrate. The proposed design with impedance bandwidth of 3 GHz and gain nearly 11dBi could be used in satellite communication and other wideband wireless applications operating in X-band.

The aim of this work is to design a low‐profile Circularly Polarized Dielectric Resonator Antenna for the X‐band frequency applications. With optimized design the proposed Cylindrical DRA (CDRA) fed by off‐centered L shaped slot is showing characteristics of Circular Polarization in the proposed band. Two orthogonal arms of off‐centered L shaped slot having different dimension excite the two TM01δ modes at 9.5 and 10.5 GHz, in addition both slots itself produce resonances nearly at 8.6 GHz. Combination of all these resonances is generating the nature of circular polarization near 9.5 GHz. Parametric study on designed antenna has been done in order to determine the effect of design parameters on the circular polarization. Axial Ratio bandwidth of 10.5% (1 GHz) and impedance bandwidth of 25% (2.3 GHz) at 9.5 GHz has been shown for single and simple feed low‐profile CDRA. Prototype of optimized design has been fabricated for the validation and measured results have shown good agreement with simulated ones. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:996–1000, 2017

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