Millimetre wave planar antenna and array thereof

Abstract

The invention discloses a millimetre wave planar antenna and an array thereof, wherein the millimetre wave planar antenna includes a metal patch, a medium substrate, a metal floor board and ground poles, the metal patch is placed on an upper surface of the medium substrate, and a lower surface of the medium substrate is fixed with an upper surface of the metal floor board; the metal patch is parallel to the upper surface of the metal floor board; the metal patch is provided with at least one pair of same first bar-shaped channels, each pair of first bar-shaped channels are distributed in bilateral symmetry form, symmetrical centre lines of each pair of bar-shaped channels are superposed, a centre line in a length direction of each first bar-shaped channel is parallel to each other, and length of each first bar-shaped channel is 1 / 2 of an operating wavelength; the ground poles vertically penetrate through the medium substrate, the ground poles are circularly distributed at intervals at the periphery of a region where the first bar-shaped channels are distributed, and two ends of each ground pole are respectively contacted with the metal patch and the metal floor board. The invention can reduce loss of a millimetre wave antenna, improve radiation efficiency of the millimetre wave antenna, simultaneously, guarantee work bandwidth of the antenna, and improve antenna gain.

Description

technical field [0001] The invention relates to a planar antenna and a planar antenna array working in the millimeter wave band. Background technique [0002] Planar antennas, such as microstrip patch antennas and planar slot antennas, are widely used in various modern communication systems due to their light weight, low manufacturing cost, easy integration, and convenient mass production. However, traditional planar antennas have various defects in the millimeter wave band, such as easy excitation of surface waves, uneven pattern, narrow frequency band, and low antenna radiation efficiency. The excitation of surface waves makes planar antennas have defects such as deterioration of pattern, decrease of gain, narrowing of bandwidth, increase of loss and decrease of antenna radiation efficiency. Dielectric loss, conductor loss, and surface wave loss are the main reasons for the low radiation efficiency of planar antennas. For planar antennas with low operating frequency and ...

AI Technical Summary

Problems solved by technology

The biggest disadvantage of the millimeter-wave antenna developed by this method is that it is very bulky, and at the same time, the processing process is complicated and it is not easy to integrate.

Millimeter-wave antennas developed using micromachining technology are often bulky, which is not conducive to integration with microstrip lines, and is not suitable for forming large-scale millimeter-wave planar antenna arrays

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