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VHF ultra-wide-band oval polarized transmitting antenna

An elliptical polarization and transmitting antenna technology, which is applied in the directions of antennas, antenna arrays, antenna supports/mounting devices, etc., can solve the problems of unreusable antennas and waste of resources

Inactive Publication Date: 2018-07-13
NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this distribution method of antennas leads to the inability to reuse the transmitting antennas of ground stations in military airports and civil airports, resulting in a certain degree of waste of resources.

Method used

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  • VHF ultra-wide-band oval polarized transmitting antenna
  • VHF ultra-wide-band oval polarized transmitting antenna
  • VHF ultra-wide-band oval polarized transmitting antenna

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0016] The invention has the characteristics of ultra-wideband and can emit elliptical polarized waves, and can realize the distribution of transmission power in the horizontal direction and vertical direction. It is mainly suitable for the transmission of transmitter signals of airport ground stations, and is one of the important components of ground equipment.

[0017] The invention combines the design advantages of the VHF vertically polarized communication antenna, and proposes a design mode of the ultra-wideband elliptical polarized antenna. This design not only solves the problem of narrow bandwidth of VHF communication antenna, but also completes the problem of vertical and horizontal transmission power distribution, and realizes that an antenna has the ability to tra...

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Abstract

The invention provides a VHF ultra-wide-band oval polarized transmitting antenna. The ultra-wide-band oval polarized transmitting antenna comprises a main antenna, an auxiliary antenna and an antennamast; the main antenna is formed by four folded vibrators in a fixed connection manner; the folded vibrators are bent by stainless steel tubes integrally to form a rectangle to feed in the middle points of the long edges; the four folded vibrators are uniformly distributed on the same circumference, adjacent two folded vibrators are perpendicular mutually, and the axial line of each folded vibrator deviates for 18 degrees from the horizontal direction; a transmission line for connecting each vibrator is 25mm in length; the top end of a feeder line is connected with a transmission line of 56mmin parallel; the feeder line is reversely added with a choke tube of 30mm; the auxiliary antenna and the main antenna are the same in structure; the perpendicular distance between the auxiliary antenna and the main antenna is 60mm; and the auxiliary antenna and the main antenna are coaxially connected with the antenna mast through detachable joints. The ultra-wide-band oval polarized transmittingantenna can transmit perpendicularly and horizontally polarized waves at the same time, and can realize power distribution in two directions, so that the antenna is applicable to signal transmission of a ground station transmitter of civil and military airports for improving airport utilization rate.

Description

technical field [0001] The invention relates to a VHF frequency band transmitting antenna. Background technique [0002] The polarization of a wave describes how the direction of the electric field vector changes with time when an electromagnetic wave propagates in space. As an electromagnetic wave guiding device in free space, the antenna's polarization mode has a crucial impact on its reception and transmission. Antenna polarization can be divided into linear polarization, circular polarization and elliptical polarization, and linear polarization is further divided into horizontal polarization and vertical polarization. According to the propagation characteristics of electromagnetic waves, horizontally polarized antennas can only (receive / transmit) horizontally polarized waves, vertically polarized antennas can only (receive / transmit) vertically polarized waves, and circularly polarized and elliptically polarized antennas can only In addition to receiving or transmitting...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/12H01Q1/36H01Q1/50H01Q15/24H01Q21/00
CPCH01Q1/12H01Q1/36H01Q1/50H01Q15/24H01Q21/00H01Q21/0006
Inventor 李明许奎李斌
Owner NO 20 RES INST OF CHINA ELECTRONICS TECH GRP
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