MICROSTRIP ANTENNA ARRAY WITHOUT AND WITH SQUARE EBG STRUCTURE

The microstrip antenna is the most popular for low price and compact design. In this paper, a microstrip antenna (MSA) mounted over a high impedance electromagnetic bandgap (EBG) substrate using square structure, also presents a reduced size of microstrip antenna with Square EBG structure. The combination of the microstrip antenna fabricated on the top of the substrate FR4 with Electromagnetic Band Gap (EBG) structures at radiating edge of patch is proposed is and investigated. A half/quarter/sixth part of patch antenna with microstrip feed is designed as a reference antenna. First, the miniaturization is investigated by reducing the size of the reference antenna through. The high gain behavior with further miniaturization is achieved by using serial feed 4x1 patch array with square EBG technique. The antenna has been designed on FR4 substrate and thickness h=1.6 mm, and has a compact structure with a total size of 60x60mm square is 118.0 mm × 175.0 mm × 1.6 mm. The proposed antenna exhibits 80MHz impedance bandwidth from (2.45-2.53GHz) with around 8.3dB gain. The characteristics of antenna like return loss, VSWR, radiation pattern and gain of the proposed antenna are described and simulated with the help of HFSS. The measurement results are in close agreement with the simulation results. The proposed Square EBG antenna is compact, low profile, and offers very high gain required for long way Communication system.