Multi-frequency dual-polarized omnidirectional antenna

Abstract

The invention discloses a multi-frequency dual-polarized omnidirectional antenna and relates to the technical field of dual-polarized omnidirectional antennas. The multi-frequency dual-polarized omnidirectional antenna comprises upper and lower two microstrip antenna arrays, an asymmetric bi-conical antenna, a multiplexer, a side feed structure and an antenna radome, wherein the upper and lower two microstrip antenna arrays are parallel to each other and are arranged at the top and the middle of the asymmetric bi-conical antenna separately; the multiplexer is arranged at inner side of the bottom of the asymmetric bi-conical antenna; and the side feed structure is arranged on the side of the whole antenna and connected with upper and lower two microstrip antenna array feed points and two output ports of the multiplexer separately. The multi-frequency dual-polarized omnidirectional antenna covers 2 / 3 / 4G and WLAN and Wi-Fi working bands, and has multi-frequency vertical and horizontal dual-polarized omnidirectional radiation functions. The upper microstrip antenna array is arranged at the top of the asymmetric bi-conical antenna to form orthogonal arrangement; the asymmetric bi-conical antenna is arranged at the center of the lower microstrip antenna array to form cored orthogonal arrangement. According to a structure combination method, the isolation degree between a vertically polarized port and a horizontally polarized port in a full band can be significantly improved and the operation bandwidth of the antenna is improved.

Description

technical field [0001] The invention relates to the technical field of dual-polarized omnidirectional antennas. [0002] technical background [0003] The horizontal polarization mode of traditional dual-polarized omnidirectional antennas can only work in a single frequency range, and cannot cover 2 / 3 / 4G, WLAN, and Wi-Fi operating frequency bands at the same time, and does not meet the technical requirements of dual-band MIMO. Due to the limited size and complex implementation structure of multi-frequency dual-polarized omnidirectional antennas, it is easy to cause the isolation between ports and the out-of-roundness of the pattern to deteriorate, which greatly affects the same-frequency transmission and reception of the antenna and the omnidirectional coverage of signals. [0004] The patent number is CN201420539869.9, which includes a horizontally polarized antenna, a vibrator body and a radome. The horizontally polarized antenna includes a substrate, and the top surface of...

AI Technical Summary

Problems solved by technology

At the same time, it solves the problems of existing solutions such as poor isolation between multiple vertical and horizontal polarization ports, poor radiation pattern out-of-roundness, bloated antenna structure, and complicated installation.

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