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An open-boundary wide-band circularly polarized Vivaldi antenna

A circular polarization and broadband technology, applied in the field of antennas, can solve problems such as the inability to switch between left-handed and right-handed circular polarization, and achieve the effect of stabilizing the phase center

Inactive Publication Date: 2019-01-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a wide-band circularly polarized Vivaldi antenna with an open boundary, which solves the problem that the prior art cannot realize left-handed and right-handed circular polarization switching

Method used

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  • An open-boundary wide-band circularly polarized Vivaldi antenna
  • An open-boundary wide-band circularly polarized Vivaldi antenna
  • An open-boundary wide-band circularly polarized Vivaldi antenna

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Embodiment 1

[0026] combine figure 1 , a broadband circularly polarized Vivaldi antenna with an open boundary, comprising a metal floor 3, four antenna units 1 and two feed structures 2, the four antenna units 1 are placed on the uppermost side to form a centrally symmetrical structure, and the The four antenna units 1, the surface profile of which is composed of a quarter circular curve, a general curve, and an exponential gradient line, the distance between the four antenna units 1 opposite to each other is 8 mm, and the four antenna units 1 for exactly the same structure. The two feeding structures 2 are fed by a 100 ohm coaxial line, and the two feeding structures 2 are mutually orthogonal, have a certain height difference and a phase difference to feed the antenna unit 1 . The metal floor 3 is located at the lowermost side and is a cube with a size of 350mm*350mm*6mm.

[0027] The advantages of the present invention can be further illustrated by the simulation diagram:

[0028] Suc...

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Abstract

The invention discloses an open-boundary wide-band circularly polarized Vivaldi antenna, comprising a metal floor, two feeding structures and four antenna units, wherein the four antenna units are centrally symmetrically arranged on the top surface of the metal floor about the center of the metal floor, the two feeding structures are arranged on the metal floor, the two feeding structures are orthogonal through a bridge, and each feeding structure is connected with two opposing antenna units. The antenna unit adopts a metal radiating sheet, the inner side walls of the four metal radiating sheets face the central axis of the metal floor, the spacing between the inner side walls of the two metal radiating sheets opposed to each other is gradually opened upward in an exponential shape, and abalun is arranged at the root toward the outer side wall, and the balun adopts a knife-like structure. The invention adopts a metal structure and is more reliable; By switching 90 degrees of phase shift leading or lagging, the left-handed circular polarization port and the right-handed circular polarization port can be switched mutually; Phase center stabilization.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a broadband circularly polarized Vivaldi antenna with an open boundary. Background technique [0002] Gradient slot antenna is a typical surface wave end-fire antenna. It relies on the gradual slot line etched on the dielectric plate to achieve the slow wave effect, and radiates energy through the gradually opened slot line during the transmission of electromagnetic waves. Gradient slot antennas are usually several wavelengths long, while the slots open to one wavelength or more in width, and processing errors without resonant structures have little effect on the antenna's operating frequency and radiation performance. Gradient slot antennas have the advantages of stable radiation pattern and radiation gain in a wide frequency band, and are widely used in ultra-wideband communication, ultra-wideband imaging and other fields. [0003] Patent (CN203826551U) discloses ...

Claims

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Application Information

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IPC IPC(8): H01Q1/36H01Q1/48H01Q1/50H01Q15/24
CPCH01Q1/36H01Q1/48H01Q1/50H01Q15/24
Inventor 邢梦飞孙琳琳廖佳
Owner NANJING UNIV OF SCI & TECH
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