AN ARRAY OF BROADBAND DUAL POLARIZED ELECTROMAGNETICALLY COUPLED MICROSTRIP ANTENNAS

In this paper, design of broadband dual polarized electromagnetically coupled antenna array is proposed to achieve high isolation between two orthogonal ports. A dual polarized electromagnetically coupled microstrip antenna is designed with a suspended radiating element placed in inverted microstrip configuration and excited by two orthogonal microstrip line feeds to achieve broad bandwidth and high isolation. The antenna is designed for 5.8 GHz frequency band. The antenna design is extended to 2× 2 antenna array, with top layer radiating elements electromagnetically coupled to the open microstrip feed line network. The 6 × 6 antenna array is designed using 2 × 2 sub arrays with power divider network. The power divider network is integrated on the back side of the feed network to feed 2× 2 antenna sub arrays. The 6×6 antenna array achieves VSWR 30 dB.