Eight-arm helical antenna

A helical antenna and feeder technology, applied to antennas, devices that enable antennas to work in different bands at the same time, electrical components, etc., can solve problems such as excessive volume, difficult processing of radiators, and inconvenient assembly of antennas, and achieve convenient processing, easy to assemble effects

Active Publication Date: 2020-11-03
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides an eight-arm helical antenna, which solves the need of the helical antenna in the prior art to achieve low elevation angle and high gain of circularly polarized radiation, and meets the needs of dual-frequency operation, and also solves the difficulty in processing the radiator and the difficulty in assembling the antenna. Convenience, bulk issues

Method used

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Embodiment Construction

[0027] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0028] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. Terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not used to limit the present invention. The term "...

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Abstract

The invention discloses an eight-arm helical antenna which comprises a rectangular upright post body formed by splicing four rectangular dielectric plates with the same structure, and a cover plate covered above the rectangular upright post body. An opening in the center of the cover plate is used as an antenna radiation port, and a mounting plate is arranged below the rectangular upright post body; each dielectric plate is covered with two 7-shaped metal radiation arms which are not connected with each other, and a metal feeder line is arranged between the two radiation arms in a covering mode and used for coupling and feeding the two metal radiation arms. According to the eight-arm helical antenna, the two metal radiation arms are coupled through the metal feeder line, the dual-band workis achieved, the metal radiation arms do not need to be wound, machining is convenient, and the whole antenna is easy to assemble.

Description

technical field [0001] The invention relates to the field of antennas, in particular to an eight-arm helical antenna. Background technique [0002] The helical antenna in the prior art is usually a quadrifilar helical antenna, which has a heart-shaped circularly polarized radiation pattern and maintains better circularly polarized characteristics at lower elevation angles, that is, better axial ratio characteristics. At the same time, it has high gain, and has the advantages of simple and compact structure and does not depend on the reference ground. It has been widely used in satellite navigation and communication fields such as GPS, Beidou, and maritime communications. [0003] The four-arm helical antenna can obtain circularly polarized radiation patterns with different shapes by adjusting the pitch radius ratio and the number of winding turns to meet different application requirements. However, the working bandwidth of the four-arm helical antenna is relatively narrow. ...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q5/20
CPCH01Q1/36H01Q1/38H01Q5/20
Inventor 曾鑫黄宏涛楚然
Owner NANJING UNIV OF SCI & TECH
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