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A dual-frequency quadrifilar helical antenna with wide beam characteristics

A four-armed helix and helical antenna technology, applied in the field of antennas, can solve the problems of large volume and weight, excellent wide beam performance, difficult realization of navigation antennas, etc., and achieve the effect of reducing the size of the antenna and stabilizing the circular polarization characteristics.

Active Publication Date: 2020-07-28
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the current high-precision navigation antennas have the disadvantages of large volume and weight, and are not suitable for drones and portable devices
However, small and lightweight navigation antennas are difficult to achieve better wide beam performance

Method used

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  • A dual-frequency quadrifilar helical antenna with wide beam characteristics
  • A dual-frequency quadrifilar helical antenna with wide beam characteristics
  • A dual-frequency quadrifilar helical antenna with wide beam characteristics

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Embodiment Construction

[0020] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0021] Such as figure 1 As shown, the present invention discloses a satellite navigation antenna with a dual-bandwidth beam width-to-axis ratio, which includes a flexible dielectric plate 1 , a helical antenna assembly 2 , a floor 3 and a feed structure 4 .

[0022] The technical index that the present invention adopts is as follows:

[0023] Operating frequency: 1.227GHz, 1.575GHz

[0024] Polarization mode: right-handed circular polarization

[0025] Antenna gain: ≥4dB

[0026] Half power beam width: ≥115°

[0027] Axial Ratio Beamwidth: 1.227GHz, ≥160°; 1.575GHz, ≥120°

[0028] The flexible dielectric plate 1 has a thickness of 0.2 mm and is composed of a hollow circular flexible pla...

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Abstract

The invention discloses a double-frequency four-arm helical antenna with a wide beam characteristic. The double-frequency four-arm helical antenna specifically comprises a flexible dielectric plate, a helical antenna assembly, a floor and four feed structures. The flexible dielectric plate comprises a hollow annular flexible plate and a hollow cylindrical flexible plate. The spiral antenna assembly comprises four pairs of metal strip strips printed on the inner wall of the hollow annular flexible plate, four pairs of double-strip spiral arms printed on the outer wall of the hollow cylindrical flexible plate and four pairs of connecting points printed on the outer wall of the hollow cylindrical flexible plate. The metal strips comprise high-frequency metal strips and low-frequency metal strips. The double-strip spiral arms comprise high-frequency spiral arms and low-frequency spiral arms. The connecting points comprise feed points and grounding points. Each feed structure comprises an inner conductor and an outer conductor.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a dual-frequency quadrifilar helical antenna with wide beam characteristics. Background technique [0002] The Global Navigation Satellite System (GNSS) has the characteristics of all-time, all-weather, high-precision, continuous implementation of ground-to-air navigation, positioning and timing, and plays an increasingly important role in economic development, scientific research, disaster prevention and control, and military fields. increasingly important role. Typically, GNSS terminal antennas consist of helical antennas, microstrip antennas or crossed dipole antennas. Among them, the quadrifilar helical antenna is widely used because of its good circular polarization characteristics. [0003] In recent years, with the rapid development of high-precision unmanned aerial vehicles and mobile measurement equipment, the navigation system is required to have the characteristics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01Q1/38H01Q1/50H01Q9/27H01Q13/08
CPCH01Q1/36H01Q1/38H01Q1/50H01Q9/27H01Q13/08
Inventor 刘宏梅施铭珂房少军牟辰王钟葆傅世强
Owner DALIAN MARITIME UNIVERSITY