A Method to Reduce the Back Radiation of the Dual-Polarized Antenna With Vertical Fins

A dual-polarized crossed dipole antenna with high front-to-back ratio is introduced in this paper. The antenna is composed of two orthogonally placed trapezoidal dipoles printed on the bottom side of a substrate. To realize high front-to-back ratio, vertical fins are employed and integrated onto the flat rectangular ground plane. Simulation results demonstrate that the antenna with modified ground-plane has an impedance bandwidth from 674 to 795 MHz (16.4%) and an improved front-to-back ratio of about 20 dB over the entire operating band.