Common-caliber variable-beam-width waveguide crack array antenna

Abstract

The invention provides a common-caliber variable-beam-width waveguide crack array antenna, comprising a waveguide crack array part and a waveguide switch network, wherein the waveguide crack array part comprises a radiation array, a coupling array and a feed network; the radiation array is divided into a combined body which takes a central radiation array as the center, takes edge radiation arrays as two wings, and respectively adopts the independent coupling array and feed network; two sets of the feed networks are simultaneously communicated with an antenna general port (10) to simultaneously work by a central feed network (5) and an edge feed network (6) through selecting a switch (9) of the waveguide switch network (7), so as to change an effective radiation caliber of the antenna into a full caliber of a narrow wave bundle; when the switch is used for communicating the central feed network with the antenna general port, the edge feed network is cut off, so that only the central radiation array works, the effective radiation caliber of the antenna is one part of the full caliber to form a wide beam bundle. The common-caliber variable-beam-width waveguide crack array antenna solves the problems of the prior art that high-precision searching and rapid large-area imaging searching cannot be simultaneously carried out.

Description

technical field [0001] The invention relates to a common aperture variable beam width waveguide slot array antenna. Background technique [0002] The waveguide slot array antenna has the advantages of small size, light weight, low profile, high efficiency, easy to achieve low sidelobes, and low cost, and is widely used in various radar and seeker systems. In these systems, a narrow beam is desired for high-precision homing, and a wide beam is desired for fast large-area imaging searches. However, due to the fixed beam width of the traditional waveguide slot array antenna, it cannot meet the shortcomings of radar and seeker systems to achieve high-precision homing and fast large-area imaging search at the same time. The new radar and seeker systems hope to achieve high-precision homing and Fast large-area imaging search function, which will greatly enhance system performance, and the key technology to be solved is the common-aperture variable beamwidth antenna technology. F...

AI Technical Summary

Problems solved by technology

However, the phased array antenna needs to use a large number of active devices, which is a very complex system, which is difficult to implement and expensive, and is not suitable for widespread use in engineering.

Therefore, the existing phased array antenna common-aperture variable beamwidth technology has the defects of complex system and high cost.

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