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Circular polarization broadband helical antenna

A helical antenna and broadband technology, which is applied in the field of broadband quasi-hybrid helical antennas, can solve the problems of performance deterioration at both ends of high and low frequencies, and achieve the effects of improving low-frequency radiation performance, stable gain, and increased frequency bandwidth.

Inactive Publication Date: 2015-06-24
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

[0013] In order to overcome the defects in the prior art, the present invention provides a circularly polarized unidirectional radiation broadband helical antenna, which is used to solve the problem of performance deterioration at both high and low frequency ends in the existing hybrid helical antenna

Method used

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  • Circular polarization broadband helical antenna
  • Circular polarization broadband helical antenna
  • Circular polarization broadband helical antenna

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Embodiment Construction

[0045] In order to make the technical solution of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] refer to image 3 , the technical scheme of the present invention comprises radome 1, antenna radiating device 2, wave-absorbing material 3, reflecting cavity device 4 and balanced feeding device 5; Reflecting cavity device 4 is made of hollow cylindrical reflecting cavity 41 and center set There is an overall structure composed of a base 42 with a first via hole 43. The interior of the reflective cavity 41 is filled with a cylindrical absorbing material 3 with a second via hole 34. At the port on the inner wall of the reflective cavity 41, four holes are evenly arranged. A connecting column 44, the antenna radiating device 2 is fixed with it by screws, and the upper surface of the antenna radiating device 2 is flush with the upper surface of the reflecting cavity 41, this ...

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Abstract

The invention provides a circular polarization broadband helical antenna, and aims at solving the problem that a current helical antenna is degraded at the high and low frequency ends. The circular polarization broadband helical antenna comprises an antenna cover (1), an antenna radiation device (2), wave-absorbing materials (3), a reflection cavity device (4) and a balance-feed device (5). The reflection cavity device (4) is formed by a reflection cavity (41) and a base (42). The reflection cavity (41) is filled with the wave-absorbing materials (3). The antenna radiation device (2) is arranged on the opening face of the reflection cavity (41). A double-arm spiral radiating body (22) is formed by smooth connecting of an inner circular double-arm standard equiangular spiral which is variable in duty ratio and periphery double-arm standard Archimedes spiral. The standard equiangular spiral is on one fifth of the total number of coils. The balance-feed device (5) is arranged on the base (42). The bottom end is connected with an SMA connector. The top end is connected with the start end of the double-arm spiral radiating body (22). The circular polarization broadband helical antenna has the advantages of being stable in performance of full-frequency band, and can be used for the fields of broadband communication and broadband spectral analysis.

Description

technical field [0001] The invention belongs to the technical field of antennas, and relates to a circularly polarized unidirectional radiation broadband quasi-hybrid helical antenna, which can be used in the fields of broadband communication, broadband spectrum analysis, and the like. Background technique [0002] As a radio frequency transmitting and receiving terminal, broadband antenna plays a vital role in systems such as broadband communication and radio spectrum detection. Under the limited installation aperture, ensuring the stability of standing wave, axial ratio and gain performance of the antenna in the whole frequency band is a research hotspot in the field of broadband antenna design engineering. [0003] Planar helical antennas have been paid attention to because of their stable broadband characteristics and easy-to-install appearance. Currently widely used planar helical antennas include Archimedes helical antennas, equiangular helical antennas, and sinuous h...

Claims

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Application Information

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IPC IPC(8): H01Q19/10H01Q1/38
Inventor 张鹏飞王蔚张晓辉徐瑞映张戈
Owner XIDIAN UNIV
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