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Multilayer quadrifilar helix antenna system

A four-armed helix and antenna system technology, applied in the direction of the connection of the antenna grounding switch structure, the structure of the radiating element, etc., can solve the problem of the difficulty of further reducing the axial size, and achieve the finished product with small size, high reliability and low profile. Effect

Inactive Publication Date: 2015-09-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0008] However, the four-arm helical antennas in the above forms are still typical three-dimensional structures, so it is difficult to further reduce the axial size

Method used

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  • Multilayer quadrifilar helix antenna system
  • Multilayer quadrifilar helix antenna system
  • Multilayer quadrifilar helix antenna system

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Embodiment Construction

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] As a preferred example of the present invention, by figure 1 It can be seen that the multi-layer quadrifilar helical antenna includes: a quasi-two-dimensional quadrifilar helical antenna, and a series stripline feed network. This antenna works at 2.492GHz.

[0026] As a preferred example of the present invention, such as figure 2 As shown, the quasi-two-dimensional quadrifilar helical antenna is composed of four layers of PCB, the material is FR4, the relative dielectric constant is 4.4, and the horizontal dimension of the PCB is 43mm×43mm. The specific structural design of the antenna is that each helical arm is divided into two horizontal arc conduction bands (that is, the angle of each arc is 45°), which are respectively located on the upper surface of the first layer and the upper surface of the fourth layer. image 3 i...

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Abstract

The invention relates to a multilayer quadrifilar helix antenna system, and belongs to microwave technology and the technical field of antennae. A quadrifilar helix three-dimensional structure of a traditional form is transformed to a quasi-two-dimensional structure, a quadrifilar helix antenna and a tandem type feed network are integrated together through a strip line-to-coaxial structure, and the multilayer quadrifilar helix antenna system is formed by machining with a multilayer PCB technology. Thus the height and the volume of a conventional quadrifilar helix antenna are greatly reduced. The axial size of the antenna is reduced by 91.5% compared with the conventional quadrifilar helix antenna, and use of the tandem type feed network ensures high integration of a feed part and an antenna part in size and form, thereby ensuring integration of an antenna feed system. The beneficial effects are that the antenna is small in finished size, low in section, and high in reliability, and has the characteristics of wide-beam circular polarization, low elevation, high gain and the like, and is suitable for a Big Dipper handheld device and other application having a requirement of performance of wide-beam circular polarization and miniaturization for the antenna.

Description

technical field [0001] The invention relates to a multilayer four-arm helical antenna system, which belongs to the field of microwave technology and antenna technology. Background technique [0002] With the rapid development of mobile satellite communication technology and navigation system, mature positioning and navigation technology has penetrated into various fields. Antenna, as one of the key devices in wireless communication, determines whether the satellite navigation system can play its role normally. The Beidou handheld positioning equipment requires antennas to have the characteristics of wide beam circular polarization and miniaturization. Commonly used antenna forms include multi-layer microstrip antennas, high dielectric constant ceramic antennas, and four-arm helical antennas. At present, an important problem that plagues the development of Beidou handheld devices is that the size of the antenna is too large, which hinders the trend of miniaturization of handh...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50
Inventor 李斌刘埇徐文生郭国强吕昕张萌段晓超倪鸿宾
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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