High-gain vertical polarized all-metal sector antenna

Abstract

The invention discloses a high-gain vertical polarized all-metal sector antenna which adopts the structure that a partially-reflective surface (21) made of metal plates of an etching gap array is arranged at the upper part of a resonant cavity (2) and a ground plate (22) is arranged at the lower part of the resonant cavity (2); the peripheries of the space between the partially-reflective surface (21) and the ground plate (22) are connected through the metal plates (23); a gap (24) is formed between the partially-reflective surface (21) and the ground plate (22); a feed source (1) is arranged in the resonant cavity (2); a rectangular gap array (25) is arranged on the partially-reflective surface (21); the feed source (1) adopts a micro-trip patch or half-wave vibrator or variant structure of the half-wave vibrator; and the polarized direction of the feed source and the long edge direction of the rectangular gap are vertical. The invention has a simple structure and can achieve high gain without forming the array, and lobe maps in the horizontal plane and the vertical plane meet the requirements of the sector antenna.

Description

technical field [0001] The invention relates to a high-gain vertically polarized all-metal sector antenna that can be used for mobile Internet access (especially WiMAX systems). Background technique [0002] At present, most of the medium and high gain sectoral antennas widely used in mobile communication are composed of half-wave oscillators with grounding plates or their modified structures. A sectoral antenna is formed by forming an array, and the horizontal plane lobe is adjusted by adjusting the shape of the grounding plate. Width, so as to achieve the communication coverage of a certain sector, and use multiple sector antennas to complete the communication coverage in the entire area. However, the sector antenna formed by forming an array requires a feeder network to realize the feeding of each unit. Therefore, the feeder network structure of the antenna is complex. Secondly, in order to achieve high gain and compensate for the attenuation caused by the feeder networ...

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Problems solved by technology

Therefore, the feeder network structure of the antenna is complex

Secondly, in order to achieve high gain and compensate for the attenuation caused by the feeder network, more units are usually required to be arrayed vertically, thus making the vertical size of the antenna larger

In addition, in the scheme of forming an array with printed patch units, although the longitudinal dimension of the antenna can be reduced to a certain extent by selecting a dielectric substrate material with a higher dielectric constant, the cost is relatively high

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