Flat waveguide feed two-dimensional beam scanning antenna

Abstract

The invention discloses a flat waveguide feed two-dimensional beam scanning antenna; the antenna is composed of a flat waveguide, N baffles, M*N outer cavities and M*N short spiral antennas; the baffle is a long rectangular plate; the outer cavity is a cuboid of which the center is provided with a radius-variable circular channel; the N baffles are inserted into the flat waveguide in the direction parallel to the x axis, so N+1 rectangular channels are formed in the flat waveguide, and the width of the N-1 rectangular channels in the middle is d; the M*N outer cavities are tightly arranged in a manner that square grids with the side length of d are parallel to the xoy plane, and the lower surfaces of the outer cavities are attached to the upper surface of the flat waveguide; and the M*N short helical antennas respectively pass through the M*N outer cavity circular channels and sequentially pass through the upper waveguide wall of the flat waveguide, the baffle plate and the lower waveguide wall of the flat waveguide. According to the method, defects of high profile, narrow working bandwidth, low power capacity and non-uniform microwave transmission of the existing spiral array antenna are overcome, the spiral antenna can be controlled to rotate in rows and columns, and two-dimensional scanning of wave beams is realized.

Description

technical field [0001] The invention relates to antennas in the technical field of high-power microwaves, in particular to a high-power microwave helical array antenna fed by a flat waveguide and capable of scanning two-dimensional beams. Background technique [0002] The high-power microwave antenna is an important tool to radiate the energy generated by the microwave source to space, and the performance of the antenna directly affects the application effect of the high-power microwave. In the context of the limited development of high-power microwave generation power, it is of great significance to study high-performance high-power microwave antennas. Due to the high power of high-power microwaves, it is difficult for a single antenna to meet the requirements of high gain and high power capacity at the same time, while array antennas can increase the antenna gain by increasing the number of sub-antennas, and can also distribute energy evenly to multiple sub-antennas to inc...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a flat waveguide-fed two-dimensional beam scanning antenna, which overcomes the shortcomings of the existing helical array antennas, such as high profile, narrow working bandwidth, low power capacity, and uneven microwave transmission, and can be integrated into rows and columns Control the rotation of the helical antenna to realize the two-dimensional scanning of the beam

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