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Multi-frequency round Beidou patch antenna with recursive coupled cavities

A patch antenna and coupling cavity technology, which is applied to antennas, devices that make the antennas work in different bands at the same time, and the structure of radiating elements, etc., to achieve the effects of novel structure, less impact from environmental factors, and small size

Inactive Publication Date: 2015-02-04
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the Beidou microstrip antenna with recursive coupling cavity has not been reported

Method used

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  • Multi-frequency round Beidou patch antenna with recursive coupled cavities
  • Multi-frequency round Beidou patch antenna with recursive coupled cavities
  • Multi-frequency round Beidou patch antenna with recursive coupled cavities

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0027] refer to figure 1 and 2 The implementation of the present invention adopts a ceramic dielectric substrate 1 with double-sided copper plating, and its length is 25mm±0.05mm, its width is 25mm±0.05mm, and its height is 2.5mm±0.05mm. Both sides of the ceramic dielectric substrate 1 are covered with copper, and one side of the dielectric substrate is etched into a dual-frequency circular radiation patch 2 with a recursive coupling cavity, and the other side of the metal is used as a ground plane 3 . The dual-frequency circular radiation patch with a recursive coupling cavity etched in the copper clad layer 2 has a circular arc notch at the outer edge of the central axis of the radiation patch, and the centers of the arcs are symmetrically located on the central axis. There is an 8-shaped gap at the center of the shaft, and at the same time, fo...

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Abstract

The invention discloses a multi-frequency round Beidou patch antenna with recursive coupled cavities and relates to a microstrip antenna. The antenna is provided with a substrate, wherein an upper surface conducting layer and a lower surface conducting layer are paved on the two surfaces of the substrate; a multi-frequency round radiation patch with the recursive coupled cavities is machined on the upper surface conducting layer; the outer edge of the central axial line of the patch is arc notch-shaped; an 8-shaped slot is formed in the axial center; the coupled cavities are symmetrically and recursively loaded on the inner side of the arc, wherein the radius ratio between two adjacent coupled cavities is gradually reduced; the central distance between the cavities is the sum of the sum of the radiuses of the adjacent cavities and 0.5 to 1mm; the coupled cavities are positioned on the central axial line of the inner side of the arc; the 8-shaped slot is formed by crossly combining two small circles; the two small circles are symmetrically positioned on the central axial line; and the lower surface conducting layer serves as a grounding plate. The antenna is low in return loss, high in gain and low in receiving and emitting signal interference, and can be applied to a Beidou navigation system sending and receiving frequency band.

Description

technical field [0001] The invention relates to a microstrip antenna, in particular to a multi-frequency circular Beidou patch antenna with a recursive coupling cavity for Beidou satellite and GPS positioning systems. Background technique [0002] Since 2000, China has successfully launched 4 Beidou first-generation navigation and positioning satellites and 11 Beidou second-generation navigation and positioning satellites. It has built a Beidou first-generation navigation test system and is building a global Beidou second-generation satellite positioning system. At present, the navigation system has the functions of positioning, timing, message and GPS wide area difference in China and its surrounding areas, and has been used in surveying and mapping, telecommunications, water conservancy, transportation, fishery, exploration, forest fire prevention and national security, etc. fields gradually play an important role. As an important part of satellite navigation, antenna pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/38H01Q5/00H01Q5/20H01Q5/40
Inventor 游佰强池金燕李立之周建华迟语寒肖振宁蔡龙瑞
Owner XIAMEN UNIV
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