A Broadband Dual-Polarized Base Station Antenna With Anti-Interference Capability

A broadband dual-polarized antenna with antiinterference capability is presented in this letter for base station applications. The proposed antenna contains three parts: main radiator, feed structures, and reflector. Specifically, the main radiator has two crossed dipoles to realize ±45° polarizations; two vertical substrates, which have Γ-shaped feeding lines on the front side and rectangle patches on the back side, are placed between the main radiator and reflector for feeding; the reflector placed below is used to get high gain and unidirectional radiation. In addition, C-shaped stubs are arranged next to the feeding lines in order to filter the unwanted frequency band. A prototype of the antenna was fabricated and tested. The measured results show that it has a bandwidth of 52.6% (VSWR