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Ultra-broadband Vivaldi circularly polarized phased-array antenna element

A phased array antenna, circular polarization technology, applied in the direction of antenna, antenna array, antenna grounding switch structure connection, etc., can solve the problems of large size, unfavorable miniaturization, large antenna, etc., achieve wide bandwidth, take into account antenna performance and Practicality, effect of reducing resonance frequency

Inactive Publication Date: 2018-11-02
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The multi-arm helical antenna has very good ultra-wideband characteristics, but its large size is not conducive to miniaturization
Although the planar helical antenna meets the requirements of low-profile design, in order to obtain better circular polarization characteristics, the antenna is still relatively large

Method used

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  • Ultra-broadband Vivaldi circularly polarized phased-array antenna element
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  • Ultra-broadband Vivaldi circularly polarized phased-array antenna element

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0027] Please refer to Figure 1 to Figure 2 , the ultra-wideband Vivaldi circularly polarized phased array antenna unit of the present embodiment is composed of four Vivaldi antenna bodies 1 with a three-dimensional structure arranged centrally symmetrically on the metal reflector 2, and the centrally symmetrical structure can make the X and Y axes The directional electric fiel...

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Abstract

The invention provides an ultra-broadband Vivaldi circularly polarized phased-array antenna element, which comprises four same Vivaldi antenna bodies of a stereoscopic structure and a metal reflectingplate, wherein each Vivaldi antenna body comprises a pair of ridge arms, an antenna cavity, a rectangular slot, a rectangular resonant cavity, a cylindrical coaxial outer conductor, a cylindrical coaxial inner conductor and a cylindrical coaxial feed interface; and in each Vivaldi antenna body, the antenna cavity, the rectangular slot, the rectangular resonant cavity, the cylindrical coaxial outer conductor, the cylindrical coaxial inner conductor and the cylindrical coaxial feed interface communicate with the pair of ridge arms, the pair of ridge arms is taken as a radiation area, the rectangular slot is taken as a transmission area, and the cylindrical coaxial outer conductor, the cylindrical coaxial inner conductor and the cylindrical coaxial feed interface are taken as a feeding area,so that energy receiving and transmitting are achieved by using the radiation area, the transmission area and the feeding area. The ultra-broadband Vivaldi circularly polarized phased-array antenna element designed according to the requirements of a modern radar technology on the indexes, such as the working bandwidth and the scanning angle has excellent performance of a broadband and excellent circular polarization property and simultaneously has the advantages of being miniaturized, simple in structure and low in loss, and pitching scanning at + / -35 degrees can be achieved.

Description

technical field [0001] The invention relates to the technical field of ultra-wideband antennas, in particular to an ultra-wideband Vivaldi circularly polarized phased array antenna unit. Background technique [0002] With the advancement of wireless radio frequency technology, linearly polarized antennas are no longer suitable for special equipment requirements. In terms of long-distance transmission and anti-interference, circularly polarized antennas have significant advantages. Circularly polarized waves have little attenuation in rain and snow, can penetrate the ionosphere, and are not affected by the Faraday effect produced by the earth's magnetic field. At the same time, the circularly polarized antenna can effectively suppress multipath interference or multipath fading, and does not require strict azimuth alignment between the antennas of the transmitting and receiving devices. Therefore, circularly polarized antennas are widely used in the field of wireless communic...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q19/10H01Q15/24H01Q1/50H01Q21/00
Inventor 姜兆能税明月乔旭光黄英杨明武宣晓峰刘建赵晓燕刘凡潘俊
Owner HEFEI UNIV OF TECH
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