Wide-beam quadrifilar helix antenna with equal-flux radiation characteristic

A technology with radiation characteristics and four-armed helix, applied in the field of antennas, can solve the problems of excellent wide beam performance, difficult to achieve, etc., to achieve the effect of stabilizing circular polarization characteristics and reducing the size of the antenna

Active Publication Date: 2020-12-25
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current miniaturized navigation antennas are difficult to achieve better wide beam performance

Method used

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  • Wide-beam quadrifilar helix antenna with equal-flux radiation characteristic
  • Wide-beam quadrifilar helix antenna with equal-flux radiation characteristic
  • Wide-beam quadrifilar helix antenna with equal-flux radiation characteristic

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] Such as figure 1 , figure 2 and image 3 As shown, the present invention discloses a wide-beam four-arm helical antenna with equal flux radiation characteristics, including an antenna dielectric substrate 1, a tapered helical antenna assembly 2, a floor 3, a feed network dielectric substrate 4 and an orthogonal feed network5.

[0020] The technical index that the present invention adopts is as follows:

[0021] Center frequency: 1.575GHz

[0022] Polarization mode: right-handed circular polarization

[0023] Half power beam width: more than 185°

[0024] Height: 141.6mm

[0025] The antenna dielectric substrate 1 is composed of an outer hollow cylindrical thin dielectric plate 11 and an inner solid cylindrical dielectric 12. The thickness of the outer hollow cylindrical thin dielectric plate 11 is 0.2mm; the tapered helical antenna assembly 2 includes a secon...

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PUM

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Abstract

The invention discloses a wide-beam quadrifilar helix antenna with an equal-flux radiation characteristic. The wide-beam quadrifilar helix antenna specifically comprises an antenna dielectric substrate, a gradual change type helix antenna assembly, a floor, a feed network dielectric substrate and an orthogonal feed network, wherein the antenna dielectric substrate comprises an outer-layer hollow cylindrical thin dielectric plate and an inner solid cylindrical dielectric; the gradual change type helix antenna assembly comprises a first helix arm, a second helical arm, a third helix arm and a fourth helix arm. According to the antenna, the three sections of stepped impedance type spiral arms of which the screw pitches are sequentially decreased are adopted, and the open-circuit branch knot is loaded at the tail end, so that a relatively wide half-power wave beam and a 3dB axial ratio wave beam are obtained while the size of the antenna is reduced; and a quadrifilar helix structure is adopted, so that a relatively stable circular polarization characteristic is obtained.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a quadrifilar helical antenna with wide beam characteristics. Background technique [0002] Circularly polarized antennas have experienced rapid development in many applications such as radio frequency identification, global positioning satellite systems, and satellite communication systems. Because circular polarization is not sensitive to physical rotation, circularly polarized links are usually the first choice for point-to-point data transmission and reception, and quadrifilar helical antennas are widely used for their excellent wide-angle circular polarization and other characteristics. [0003] In satellite navigation and satellite communications, wide beamwidths are preferred for precise position control. Assuming that there is a communication link between the satellite and the ground station, the link distance is inversely proportional to the elevation angle of the sate...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50
CPCH01Q1/36H01Q1/38H01Q1/50
Inventor 刘宏梅罗彬闫团圆郭永全房少军王钟葆
Owner DALIAN MARITIME UNIVERSITY
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