Base station antenna and isolation plate thereof

Abstract

The invention discloses an isolation plate. The isolation plate is a metal sheet; one or more hollow transparent windows and one or more hollow resonant tanks are arranged along the length direction of the metal sheet; each transparent window is formed by one or more vertical slots formed through processing along the height direction of the metal sheet; and each resonant tank is formed by one or more horizontal gaps formed through processing along the length direction of the metal sheet. The invention further discloses a base station antenna. Through the isolation plate, no significant effectis generated on a directional diagram of a high-frequency oscillator while isolation of a low-frequency oscillator can be improved; and rapid deterioration of cross polarization caused by scattering and resonance is avoided while isolation of a port is improved.

Description

technical field [0001] The invention relates to a base station antenna and an isolation board thereof. Background technique [0002] Port isolation and cross-polarization discrimination are important technical indicators of base station antennas. Improving port isolation and cross-polarization discrimination is of great significance for enhancing the anti-interference ability of base station antennas, improving receiving sensitivity, giving full play to channel capacity, and increasing wireless data transmission rates. important meaning. [0003] Due to the limitation of the size of the radome and the reflector of the base station antenna, it is often difficult to achieve a safe isolation distance between the radiation units. The mutual reception and secondary radiation between the oscillators not only deteriorate the port isolation, but more seriously, secondary radiation and scattering pass through The superposition with the incident wave leads to serious deformation of t...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of the size of the radome and the reflector of the base station antenna, it is often difficult to achieve a safe isolation distance between the radiating elements. Superposition with the incident wave leads to serious deformation of the pattern

[0004] In addition, electromagnetic waves scatter and resonate through metal boundaries such as reflectors and partitions. On the one hand, it leads to beam skew, deformation, and grating lobes. On the other hand, the cross-polarized components contained in stray electromagnetic waves seriously reduce the noise immunity of the antenna. and cross-polarization discrimination rate, thus affecting the signal transceiver sensitivity and communication rate

At present, the lack of effective isolation means has become a technical bottleneck that limits the cross-polarization discrimination rate of base station antennas and uses polarization diversity for wireless communication expansion.

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