A deployable helical antenna, communication system, radar, electronic countermeasure system

Abstract

The invention belongs to the technical field of antennas, and discloses an expandable helical antenna, a communication system, a radar, and an electronic countermeasure system, including: a helical radiator, a bottom plate, a top cover, several unfolding support devices, several unfolding slide rail devices and an antenna cover. Several deployment support devices are distributed between the helical radiation arms in the axial direction, and stretch and slide along the axial direction of the slide rail device to realize the expansion and retraction of the helical radiation arms, and simultaneously ensure the stability of the antenna helix diameter during the deployment process. The upper and lower radome is unfolded and folded through the cooperation of several struts, positioning blocks, and slide rails; the invention realizes the unfolding and folding of the large-size three-dimensional helical antenna, making it easy to carry and highly reproducible in assembly; ensuring the stability of the helical antenna With good strength, stability, and airtightness, it can be used in harsh environments. When the helical antenna is in the unfolded state, it can achieve high gain and narrow beam requirements, and when the helical antenna is in the retracted state, it can achieve low gain and wide beam requirements.

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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