Notched jade ring type circular polarized antenna

A circularly polarized antenna and jade technology, used in satellite communications, radar, and antenna fields, can solve the problems of limited application occasions, the performance of the antenna is greatly affected by the structure, and the volume of the antenna is large, and the effect of simple structure is achieved.

Inactive Publication Date: 2015-05-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] At present, there are many forms of circularly polarized antennas. The most commonly used forms are as follows: (1) Antennas that use different curved surface shapes to achieve circularly polarized performance. The curved surface structure of this type of antenna is relatively complicated, and the antenna performance is greatly affected by the structure. , and difficult to process; (2) Although the circularly polarized antenna composed of an antenna array can broaden the frequency band and increase the gain to a large extent, it requires an additional feed network, the antenna is large in size, and its application is limited; ( 3) Circularly polarized microstrip antennas using orthogonal feeds or multi-point feeds will cause unwanted coupling between feed circuits

Method used

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  • Notched jade ring type circular polarized antenna
  • Notched jade ring type circular polarized antenna
  • Notched jade ring type circular polarized antenna

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0022] The present invention proposes a jade-shaped circularly polarized antenna with broadband characteristics. The jade-shaped circularly polarized antenna adopts single-point feeding and cuts off a fan-shaped area on the antenna surface. The size of the gap is determined by θ 3 decision, it is worth noting that when the gap angle θ 3 In the range of 2° to 6°, the axial ratio of the antenna is better, and circularly polarized waves can be generated. When feeding power to the left end face or the right end face of the slot of the jade-shaped circularly polarized antenna, left-handed circular polarization or right-handed circular polarization will be generated. Three important antenna dimensions that affect the working frequency of the jade-shaped circularly polarized ante...

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Abstract

The invention provides a notched jade ring type circular polarized antenna. The circular polarized antenna comprises an antenna unit and an earth plate, and is characterized in that the antenna unit conducts single feeding through a coaxial feeder; a sector is cut in the surface of the annular antenna unit; the center of the sector and the center of the antenna unit are at a same position; the radius of the sector is equal to the outer diameter of the antenna unit; air dielectric is arranged between the antenna unit and the earth plate. The circular polarized antenna has the advantages that the circular polarized antenna is simple in feeding manner, relatively low in influence of change of feeding point position to aerial performance, and relatively wide in band frequency.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a wide-band, high-gain jade-shaped circularly polarized antenna, which is used in the fields of satellite communication and radar. Background technique [0002] With the development of communication, remote control and telemetry technology, the expansion of radar application range and the need for tracking and measurement of high-speed targets in various polarization modes and weather conditions, the linear polarization mode has been difficult to meet the requirements, and the application of circularly polarized antennas becomes very important. Because, the electromagnetic wave radiated by the circularly polarized antenna can be received by any polarized antenna, and any polarized electromagnetic wave can be received by the circularly polarized antenna. At the same time, the high gain of the antenna can effectively improve the sensitivity of the received signal, that is, the qu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/36H01Q1/50
Inventor 李建瀛杨祎张兆林张凯
Owner NORTHWESTERN POLYTECHNICAL UNIV
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