Impact of different Dielectric material on a Tri-band Micro-strip patch antenna for Wireless Applications

Developing low-dielectric materials has opened new paths toward developing highly efficient microstrip Patch antennas for wireless applications. This paper presents the performance of various dielectric materials, having dielectric constants ranging from 2 to 5. The rectangular microstrip patch antennas for WiMAX, WLAN applications have been designed and fabricated. Substrates used to design the antennas are FR4 glass epoxy, RT Duroid, and Rogers with dielectric constants of 4.4, 2.2, and 3 respectively. The thickness of the substrates is fixed at 1.52 mm. A comparative analysis based on return loss, bandwidth, VSWR, efficiency, simulated 3-D radiation pattern, gain, and directivity.