Deployable helical antenna, communication system, radar and electronic countermeasure system

Abstract

The invention belongs to the technical field of antennas, and discloses a deployable helical antenna, a communication system, a radar and an electronic countermeasure system. The antenna comprises a helical line radiator, a bottom plate, a top cover, a plurality of deployable support devices, a plurality of deployable slide rail devices and an antenna housing. The unfolding supporting devices aredistributed between spiral line radiation arms in the axial direction and slide in a telescopic mode in the axial direction of a sliding rail device to achieve unfolding and folding of the spiral lineradiation arms, and it is synchronously guaranteed that the spiral diameter of the antenna is stable in the unfolding process. An upper radome and a lower radome are unfolded and folded through the synergistic effect of supporting rods, positioning blocks and the sliding rail. According to the invention, unfolding and folding of the large-size three-dimensional helical antenna are realized, so that the large-size three-dimensional helical antenna is convenient to carry and high in assembly repeatability; and the strength and stability of the helical antenna are guaranteed, the leakproofness is good, the helical antenna can be applied to a severe environment, when the helical antenna is in an unfolded state, the high-gain and narrow-beam requirements are met, and when the helical antenna is in a folded state, the low-gain and wide-beam requirements are met.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to an expandable helical antenna, a communication system, a radar, and an electronic countermeasure system. Background technique [0002] At present: the axial mode helical antenna is a kind of circularly polarized antenna with excellent performance, which is widely used in communication, radar, electronic countermeasure and other fields. In ultra-high frequency (UHF), due to the large volume of the required helical antenna, a support structure is required to control the stiffness and pitch of the helical antenna. In order to facilitate portability and reduce the volume of the helical antenna, it is advisable to adopt an expandable structure design. For large-scale helical deployment antennas, flexible deployment support methods have been realized, such as flexible support wires such as metal wires, elastic rods, and ropes. However, the limited stroke of the flexible m...

AI Technical Summary

Problems solved by technology

For large-scale helical deployment antennas, flexible deployment support methods have been realized, such as flexible support wires such as metal wires, elastic rods, and ropes. However, the limited stroke of the flexible member leads to a decrease in stability, and the overall stiffness of the flexible mechanism is poor, and it can withstand stress for a long time Or high-temperature flexible components may experience stress relaxation, so that the flexible support method cannot guarantee strength and stability, and it is difficult to apply to various harsh environments

[0003] Through the above analysis, the existing problems and defects of the existing technology are: the current large-scale helical deployment antenna cannot guarantee its strength and poor stability, and it is difficult to apply to various harsh environments

[0004] The difficulty in solving the above problems and defects is: although the rigid support can enhance the structural stability and strength, it may increase the overall weight and volume, so the designed deployable helical antenna needs to achieve a balance between the two

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