Dual-Band Slotted Microstrip Patch Antenna Design for Application in Microwave Communication

A single layer, single feed compact slotted patch antenna suitable for dual-band operations is thoroughly simulated in this paper. Patch antenna is basically a low cost, light weight, medium gain and narrowband antenna and suited for short-range microwave application such as a feeding element for other antennas and in research institutes as a reference antenna, it can also be used at output of signal conducting circuit for receiving signals from MEMS. By loading properly arranged slots on a rectangular microstrip patch, dual frequency and broadband operations of a single feed rectangular patch is achieved to increase bandwidth performance of the antenna. The impedance bandwidths of 562.85 MHz with return loss -28.64 dB and 1.17 GHz with return loss -43.40 dB are obtained in the proposed design. And simulated antenna size has been reduced by 59.07% with an increased frequency ratio when compared to a conventional microstrip patch antenna. The characteristics of the designed structure are investigated by using MoM based electromagnetic solver, IE3D. The simple configuration and low profile nature of the proposed antenna leads to easy fabrication and make it suitable for the applications in microwave communication system.