Design and Development of UWB Modified Maltese Shaped Dielectric Resonator Antenna

In this paper, design of a modified Maltese shaped dielectric resonator antenna (DRA) is proposed. Conformal strip feeding of trapezoidal shape is used to feed the DRA. The Maltese shape introduces air gap in the DRA design which helps in reducing the Q-factor and in turn helps in achieving wide bandwidth (BW). Further, circular slots and two orthogonal slits are introduced in a Maltese shaped DRA to achieve ultra-wide bandwidth (UWB). The proposed DRA is fabricated, tested and the measured results are in good agreement with the simulation. Measured return-loss bandwidth of about 111 % covering frequency band from 3.6 to 12.6 GHz is achieved. Various design parameters along with measured and simulated results are discussed in this paper.