Box-shaped fan-beam antenna

Abstract

The invention provides a box-shaped fan-beam antenna. The box-shaped fan-bean antenna comprises a feed horn, a main cylindrical reflector, an auxiliary cylindrical reflector, an upper cover plate, a lower cover plate, a left baffle and a right baffle. The Cassegrain antenna geometric form is adopted in a bus of the main cylindrical reflector and a bus of the auxiliary cylindrical reflector, the upper side of the main cylindrical reflector, the lower side of the main cylindrical reflector, the left side of the main cylindrical reflector, the right side of the main cylindrical reflector, the upper side of the auxiliary cylindrical reflector, the lower side of the auxiliary cylindrical reflector, the left side of the auxiliary cylindrical reflector and the right side of the auxiliary cylindrical reflector form a box-shaped cavity through the upper cover plate, the lower cover plate, the left baffle and the right baffle respectively, the horn conducting feed on the box-shaped cavity is hidden inside the box-shaped cavity and a waveguide port in the rear portion of the horn serves as a feed port. The box-shaped fan-beam antenna can provide fan beams with a wide pitch (azimuth) range and a narrow azimuth (pitch) range, and is simple in structural form, easy to process and manufacture and very suitable for being applied to millimeter-wave and over-submillimeter-wave frequency bands.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a box-shaped fan-shaped beam antenna. Background technique [0002] In the field of radar and navigation technology, in order to find the target easily, it is usually required to widen the pattern of the other main plane while maintaining a sharp pattern on one main plane, that is, to obtain a fan beam. With the development of radar and navigation technology, the working frequency band is developing towards the millimeter wave and submillimeter wave frequency bands. The fan beam also requires the wider the pitch ( / azimuth) range and the narrower the azimuth ( / pitch) range, the better to achieve Increase the scanning range, improve the resolution, and find the purpose of the target as soon as possible. [0003] The disclosed antennas for generating fan-shaped beams include parabolic cylindrical antennas, box-shaped short backfiring antennas, array antennas, and lens ...

AI Technical Summary

Problems solved by technology

The fan-shaped beams produced by the current parabolic antennas and box-shaped short backfiring antennas are narrow in width and wide in narrowness, and cannot achieve a large width-to-narrow ratio

When the array antenna works in the lower working frequency band, the current processing and manufacturing level can be realized, but after reaching the millimeter wave and submillimeter wave frequency band, the current processing and manufacturing is basically impossible or the cost is too high

The lens antenna requires special dielectric materials, and there are problems such as dielectric loss, heavy weight, and large volume.

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