Multi-frequency base station antenna and antenna feed system

Abstract

The invention provides a multi-frequency base station antenna and an antenna feed system, and relates to the technical field of communication. The multi-frequency base station antenna comprises a reflecting plate, at least one high frequency radiation array and at least one low frequency radiation array; the high and low frequency radiation arrays are arranged on the reflecting plate in parallel;each high frequency radiation array comprises high frequency radiation units, and slits exist are arranged between the high frequency radiation units and the reflecting plate; the low frequency radiation array comprise low frequency radiation units, and a radiation arm of each low frequency radiation unit includes a structure whose shape is similar to that of the Chinese character chuan (which means string); and the structure includes two wide end portions and a narrow intermediate portion. According to the multi-frequency base station antenna and antenna feed system, unfavorable coupling between the high and low frequency radiation units can be weakened, high and low radiation performances are maintained, and a radiation directional diagram of the high and low frequency arrays can be improved without increase of the overall size and thickness of the antenna.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a multi-frequency base station antenna and an antenna feeder system. Background technique [0002] Due to the shortage of base station site space resources, the miniaturization, multi-system, and broadband of multi-frequency base station antennas have become the mainstream of development. It is required that a pair of ultra-wideband multi-band base station antennas can work in multiple frequency bands, for example, one low-frequency radiation unit works in the 690-960MHz frequency band, and another or more high-frequency radiation units work in the 1710-2690MHz frequency band. The layout of the internal components of the multi-frequency base station antenna is becoming more and more compact, and two or more groups of radiating oscillator units working at different frequencies are getting closer to reduce the volume of the base station antenna. However, the spatial mutual co...

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Problems solved by technology

For the former method, the overall size of the antenna will become larger; for the latter method, it will only have a significant effect when the size of the medium reaches a certain multiple of the working wavelength of the high and low frequency radiation oscillator. Generally, the size of the medium needs to be high 0.1 to 0.25 times the operating wavelength of the frequency oscillator

For ultra-broadband high-frequency bands, such as 1710-2690MHz, according to the shortest wavelength of 111mm, the thickness of the medium is required to be about 11-27mm. In this way, the thickness of the medium will be larger, resulting in a larger overall thickness and weight of the antenna.

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