Design of miniaturized D-band dual-polarized dipole base station antenna based on coupling feeding

This article designs a coupling feeding miniaturized base station antenna. This base station antenna works in D-band (2500-2700 MHz). By introducing a bending structure to increase the current path of the dipole, the overall size of the dipole antenna can be reduced. The final design of antenna element size is only 36.8 x 36.8 mm(2) (0.32 x 0.32 lambda(2)). The simulation results show that the return loss of the two ports is greater than 23 dB, the isolation between the two ports is greater than 29 dB, the half-power beamwidth of the antenna is 63 degrees +/- 1.5 degrees, and the gain is greater than 9 dBi. The physical processing and simulation results are basically consistent, which prove the practicability of the dipole antenna. A broadband dipole antenna and this antenna are selected for array analysis. When it works in D-band, the isolation of the antenna element designed in this article is better than that of the broadband dipole antenna.