Multibeam cavity-backed high gain antenna array applicable to millimeter wave communication

Abstract

The invention discloses a multibeam cavity-backed high gain antenna array applicable to millimeter wave communication. The antenna array comprises a radiation patch antenna and a wave beam molding feed network, wherein the radiation patch antenna comprises an upper substrate and a lower substrate, an upper surface of the upper substrate is provided with four antenna units with intervals, multiple metallization through holes are circled at periphery of the four antenna units to form a metal cavity, the lower substrate is provided with four substrate integration waveguides, multiple metallization through holes are circled to form each substrate integration waveguide, the four substrate integration waveguides are provided with four input ends of the radiation patch antenna, and the four input ends of the radiation patch antenna are respectively correspondingly connected with four output ends of the wave beam molding feed network. When the four input ends of the wave beam molding feed network are inputted with four paths of electromagnetic wave beam excitation, and phase differences of the adjacent output ends are respectively 45 DEG, 135 DEG, -135 DEG and -45 DEG. The antenna array is advantaged in that surface electromagnetic waves can be effectively inhibited through the added cavity-backed structure, and antenna gain is further improved.

Description

technical field [0001] The invention relates to the technical field of microwave communication, in particular to a multi-beam cavity-backed high-gain antenna array suitable for millimeter wave communication. Background technique [0002] With the rise of 5G, the millimeter-wave frequency band, especially the 60GHz frequency band, has been widely studied by scholars due to the higher data transmission rate and large transmission capacity of the communication system. However, the 60GHz frequency band is at the absorption peak of the atmosphere, so the path loss is very large. To deal with this problem, high-gain antennas must be used to compensate for the path loss. However, for high-gain antennas, due to their high directivity, the coverage of their beams is limited. In order to obtain high gain and cover a wider range at the same time, multi-beam antennas are a good choice. However, the gain of the traditional 1×4 multi-beam patch antenna array is low. The reason is that o...

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Problems solved by technology

[0003] The main purpose of the present invention is to provide a multi-beam cavity-backed high-gain antenna array suitable for millimeter wave communication, aiming to solve the technical problem of low gain of the existing multi-beam patch antenna array

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