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Broadband wide-angle-axial-ratio circularly-polarized patch antenna

A patch antenna and circular polarization technology, which is applied in the direction of antenna, antenna grounding device, antenna grounding switch structure connection, etc., can solve the problems of high cost and complex structure, and achieve the effect of light weight, low profile and wide working bandwidth

Inactive Publication Date: 2019-08-30
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with multi-point feeding, the multi-element method has a simpler feed network, but the structure is more complicated and the cost is high

Method used

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  • Broadband wide-angle-axial-ratio circularly-polarized patch antenna
  • Broadband wide-angle-axial-ratio circularly-polarized patch antenna
  • Broadband wide-angle-axial-ratio circularly-polarized patch antenna

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0035] The invention broadens the impedance bandwidth of the patch antenna by adopting a Y-shaped structure to couple and feed; widens its axial ratio bandwidth by introducing multi-point feeding; and then adds L-shaped parasitic branches around the antenna to widen the beam width of the antenna . The final antenna can be within the frequency band (1.3-4.1GHz), its standing wave VSWR<2, its axial ratio AR<3, and in the case of axial ratio AR<3, the wide angle range is 60°-140°.

[0036]The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[003...

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Abstract

The invention belongs to the technical field of antennas, and discloses a broadband wide-angle-axial-ratio circularly-polarized patch antenna. The antenna comprises a radiator and a one-to-four feed network. The radiator is composed of four Y-shaped coupling structures and circular radiation sheets which are printed on a first dielectric plate and have the same specification, a ground printed on asecond dielectric plate, six L-shaped parasitic branches which are uniformly distributed around the ground and have the same specification, and four dielectric cylinders which play a role in supporting. The feed network is composed of a two-stage cascaded Wilkison power divider and a 90-degree phase shifter which are printed on a third dielectric plate. According to the invention, the circular radiation patch is fed in a coupling mode, the network adopts the Wilkison power divider and the 90-degree phase shifter which are printed on the medium and are in a multi-stage cascade mode, and the antenna is easy to process, low in profile, light in weight and wide in working bandwidth and can be applied to a navigation system and the like.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a circularly polarized patch antenna with wide bandwidth and angular axis ratio. Background technique [0002] At present, the existing technology commonly used in the industry is as follows: the microstrip patch antenna is an antenna composed of one or more layers of conductor sheets printed on a dielectric board, which has the advantages of light weight, small size, low profile, easy processing, and easy It has the characteristics of conformal installation with the carrier, so it is widely used in microwave integrated circuits, antennas and antenna arrays. The radiator is printed on one side of the dielectric board, and the metal floor is printed on the other side. Such an antenna has a simple structure and is easy to process, but its working bandwidth is very narrow, and its performance is greatly affected by the dielectric substrate. At present, military and civi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q15/24
CPCH01Q1/38H01Q1/48H01Q1/50H01Q15/24
Inventor 雷娟孙学平傅光
Owner XIDIAN UNIV
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