Single-feed broadband low-profile circular polarization microstrip antenna

A microstrip antenna, low profile technology, applied in the directions of antennas, antenna components, antenna grounding devices, etc., can solve the problems of large size and complex feeding network, and achieve the effect of simple design, easy integration and low cost

Pending Publication Date: 2018-06-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the feed network is more complicated and the size is larger

Method used

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  • Single-feed broadband low-profile circular polarization microstrip antenna
  • Single-feed broadband low-profile circular polarization microstrip antenna
  • Single-feed broadband low-profile circular polarization microstrip antenna

Examples

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific examples.

[0021] see figure 1 with figure 2 As shown, the single-feed broadband low-profile circularly polarized microstrip antenna described in this embodiment uses a dielectric substrate 1 with a size of 200mm*200mm*3.2mm, the bottom surface is covered with copper as the floor 2, and the top surface is the main patch 3 and parasitic patches 41 and 42. The main patch is a circular patch with slots 51 and 52. The radius of the main patch is 18mm, and the size of the slots is 5mm*3.3mm. The parasitic patch is two fan rings, the inner and outer diameters of which are respectively 30mm and 38mm, the central angle phi=54.5 degrees, and the central position of the parasitic fan ring forms an angle of theta=20 degrees with the Y axis. Use the SMA connector 6 to feed power to the main patch, and the feeding position forms an angle of alpha=45 degrees with the X axis, and the distance from ...

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Abstract

The invention discloses a single-feed broadband low-profile circular polarization microstrip antenna. The single-feed broadband low-profile circular polarization microstrip antenna comprises a dielectric substrate; a bottom layer of the dielectric substrate is coated with copper to serve as a floor; a top layer of the medium substrate is provided with a geometrical perturbation introduced main patch and parasitic patches; the main patch is fed by an SMA joint or a coaxial wire; the parasitic patches are distributed at the periphery of the main patch; the number is at least two; the shape of each parasitic patch is a fan ring shape taking the center of the main patch as a circle center; and the parasitic patches are rotationally symmetrical about the center. The single-feed broadband low-profile circular polarization microstrip antenna can effectively realize circular polarization for satellite communication, and has the advantages of simplicity in design and processing, light weight, one-way radiation and the like.

Description

technical field [0001] The invention relates to the field of wireless communication and antenna technology, in particular to a single-feed broadband low-profile circularly polarized microstrip antenna. Background technique [0002] In recent years, satellite navigation technology has developed rapidly, and China's Beidou satellite navigation system is also expected to provide global services in 2020. Due to the relative movement between the satellite and the ground, in order to allow the satellite signals to be received in different places on the ground, it is the best choice to use a circularly polarized antenna on the satellite. And because the microstrip antenna has the obvious advantage of light weight, the circularly polarized microstrip antenna has become the best choice and has attracted much attention. In addition, since the antenna is installed on the satellite, it is necessary to introduce the floor to achieve unidirectional radiation to the ground. [0003] We k...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q1/28
CPCH01Q1/288H01Q1/38H01Q1/48H01Q1/50
Inventor 褚庆昕林江锋
Owner SOUTH CHINA UNIV OF TECH
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