Circularly Polarized Cylindrical Dielectric Resonator Antenna coupled by V-shaped resonating slot

In this paper circularly Polarized Dielectric Resonator Antenna for the Satellite frequency applications has been designed. With proper design the proposed Cylindrical DRA fed by centered V-shaped slot; is showing characteristics of Circular Polarization in the desired band. Two orthogonal arms of symmetrically centered V-shaped slot having same dimension excite the TM_01δ modes at 9.75GHz as well as slots itself are resonating at 8.5 GHz. Crossing of λ/4 long micro strip line between both slots at an angle of 45° is generating the nature of circular polarization near the 8GHz frequency range. Axial Ratio bandwidth (AR ≤ 3 dB) of 9% (720MHz) and impedance bandwidth (S₁₁ ≤ -10 dB) of 28% (2.47GHz) has been shown by the antenna which can be considered large axial ratio bandwidth for single and simple feed CDRA. Proposed antenna has shown average gain of more than 6 dBi in broadside direction with more than 95% radiation efficiency in desired band.