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VHF frequency band satellite-borne four-arm helical antenna

A four-arm helical, space-borne technology, applied in the field of satellite communication antennas, can solve the problems of insufficient structural strength and large volume, and achieve the effects of reduced antenna weight, high structural strength, and uniform free-space radiation

Active Publication Date: 2020-01-31
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a VHF frequency band space-borne four-arm helical antenna, which overcomes the disadvantages of insufficient structural strength and excessive volume when the traditional four-arm helical antenna is used on a satellite.

Method used

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  • VHF frequency band satellite-borne four-arm helical antenna
  • VHF frequency band satellite-borne four-arm helical antenna
  • VHF frequency band satellite-borne four-arm helical antenna

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0017] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for the understanding of those familiar with this technology, and are not used to limit the implementation of the present invention. Conditions, any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope covered by the technical content disclosed in the present invention without affecting the effect and purpose of the present invention. Inside.

[0018] combine figure 1 , figure 2 and image 3 , the VHF frequency band spaceborne four-arm helical antenna described in the present invention includes a radome 1, a four-arm helix 2, a metal cone 3, a short-circuit metal disc 4, a mounting base 5,...

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Abstract

The invention discloses a VHF frequency band satellite-borne four-arm helical antenna. The antenna comprises an antenna cover, a four-arm helix, a metal frustum, a short-circuit metal disc, a mountingbase, a matching network dielectric plate, an LC matching network and a connecting probe. The antenna works in the normal mode of the helical antenna. The radiation pattern of the antenna is equivalent to the radiation pattern of a dipole. The antenna realizes omnidirectional radiation on a horizontal plane. The four-arm helix, the metal frustum and the top short-circuit metal disc of the antennaare integrally designed with no supports designed therebetween. The total height of the four-arm helix is only 0.13 lambda; the total height of the antenna is 0.14 lambda; the size of the mounting base of the antenna is 120mm*120mm; and therefore, the surface space of a satellite can be saved. The LC matching network is placed on the back surface of the mounting base. A groove is formed in the corresponding mounting position of the satellite, so that network short circuits can be avoided; and a closed space is formed, so that resonance efficiency can be improved. Compared with the prior art,the antenna is smaller in height and occupies less space.

Description

technical field [0001] The invention belongs to satellite communication antennas, in particular to a space-borne four-arm helical antenna in the VHF frequency band. Background technique [0002] When the helical antenna works in the normal mode, it has an omnidirectional pattern on the horizontal plane, and can be miniaturized, greatly reducing the height and volume of the antenna. In satellite communication, due to the limited volume of the satellite itself, when using the VHF frequency band for communication At this time, the position that the antenna can occupy is more limited. The traditional antenna will be very large at this frequency, and it is difficult to carry it on the satellite. Pole antennas are widely used in satellite communications. [0003] At present, the satellite communication antennas in the VHF frequency band are mostly in the form of spirals, especially the antennas of ground stations, all of which use circularly polarized four-arm helical antennas. F...

Claims

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Application Information

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IPC IPC(8): H01Q1/22H01Q1/36H01Q1/48H01Q1/50H01Q19/10
CPCH01Q1/22H01Q1/36H01Q1/364H01Q1/48H01Q1/50H01Q19/10
Inventor 田智明周曈
Owner NANJING UNIV OF SCI & TECH
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