Compact dual band convexo-concave microstrip patch antenna having bow tie slot with Alteration of Dielectric Substrate for remote sensing applications

Microstrip antennas are one of the most widely studied antenna structures, perhaps due to their inherent properties like compact size, light weight and their capability to get integrated with other circuit components. A three dimensional rectangular slot loaded dielectric (Alteration of Dielectric Substrate) of the antenna for dual-band (S & C) operation has been proposed for remote sensing applications. In this paper, first a single layer convexo-concave patch antenna with a concave bow tie slot is designed and analyzed. Then a superstrate layer is introduced with this antenna. A comparative study between the single layer and multilayer convexo-concave patch antenna is done and it is observed that after the application of a superstrate layer with alteration of dielectric substrate the antenna resonates at two different frequencies 3.17 GHz and 5.34 GHz with a bandwidth of 7 % and 17 % respectively.