The Design of a Dual-Polarized Small Base Station Antenna With High Isolation Having Dielectric Feeding Structure

A dual-polarized small base station antenna with a dielectric feeding structure is presented. The proposed antenna is composed of a micro-strip feed line board, eight metallic shorting plates, four dielectric feed substrates, four metallic radiators, a metallic cube, and a radome. A wide impedance bandwidth of 20% (2.45 to 3.0GHz) is achieved. The proposed antenna has an isolation of greater than 50dB over the operating bandwidth. Details of the proposed antenna design, and the simulated and measured results are presented and discussed.