Capacitive Cloaking Technique for Antenna Elements in Multi-Band Array Environments

A capacitance-based interference mitigation technique for multi-band dual-polarized base station antenna arrays is presented for microwave frequencies. Improved radiation characteristics such as gain, front-to-back ratio, and cross polarization discrimination can be achieved through utilization of this design technique. Simulation results utilizing this versatile technique applied to dipoles operating from 0.698-0.894 GHz and 1.695-2.180 GHz, and dipole feed stems operating from 1.695-2.700 GHz are demonstrated with VSWR < 1.7 in two different array environments.