Design of Compact Circular Microstrip Patch Antenna using Parasitic Patch

In the present study circular microstrip patch antenna is designed for the Ultra High frequency (UHF) band of 470MHz-806MHz. Different studies have been published in this area for the amelioration of the patch antenna. We can choose any antenna application depending upon our requirements. There is a big disadvantage of microstrip antenna i.e. narrow bandwidth, low efficiency and low gain. To enhance antenna gain multilayer are used in the proposed design. In this study circular microstrip patch antenna is designed and the resonant frequency of the proposed antenna is determined for different parasitic patch locations, Feeding Point, Shorting Pin, and Substrate thickness. Main Patch is shorted with the pin from center. Resonant frequencies of the purposed antenna are investigated by changing the antenna parameters like parasitic patch antenna location, Feeding Point, shorting pin location, and substrate height (h). It is observed that the proposed design can reduce size up to 60%.