A Wideband Dual-Polarized Differential Fed Dipole with Low Profile Based on Square Patch Resonator

In this article, a new design of a wideband dual-polarized (DP) single-layered differential fed dipole antenna with low profile based on square patch resonator is presented. The proposed antenna is composed of a square patch resonator and two polarization channels consisting of dipole antennas. By virtue of TM12- and TM21-mode, the feasibility of excitation of planar dipole antennas and intrinsic polarization isolation can be conceived. Thus, a DP differential fed planar dipole antenna prototype is developed. To further enhance the gain level, extra reflectors are introduced, and significant improvement of gain is achieved as expected. For validation, the proposed DP dipole antenna is simulated. The simulated results exhibit excellent performances in terms of a 10-dB impedance bandwidth of 8.6% from 3.4 to 3.71 GHz, a stable in-band gain of 7.6 dBi, a high channel isolation of over 55 dB and a low profile of 0.015λ0.