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All-dielectric transmission-type quasi-optical mode converter for high-power microwave device

A mode conversion and transmission technology, applied in waveguide devices, electrical components, antennas, etc., can solve the problems of inability to use in high-power microwave fields, affecting mode conversion efficiency, prone to breakdown discharge, etc., to avoid ohmic loss, Conducive to collection and application, broadening the effect of application

Pending Publication Date: 2022-07-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, plasmonic metamaterials suffer from ohmic losses, resulting in inefficient wave transmission on such metasurfaces, affecting the mode conversion efficiency
Plasmon metamaterials and metasurfaces are composed of metal periodic structures. In a strong electromagnetic field environment, due to the tip effect of the metal surface, breakdown discharges are prone to occur, and cannot be used in the high-power microwave field.
[0007] To sum up, there are certain deficiencies in several commonly used mode converters at present.

Method used

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  • All-dielectric transmission-type quasi-optical mode converter for high-power microwave device
  • All-dielectric transmission-type quasi-optical mode converter for high-power microwave device
  • All-dielectric transmission-type quasi-optical mode converter for high-power microwave device

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Embodiment 1

[0038] This embodiment provides an all-dielectric transmission type quasi-optical mode converter for a vacuum electronic device, and the converter is used to convert the TE01 mode into a Gaussian beam mode. structure asfigure 1 As shown, the converter consists of 196 units with the same structure, which are closely arranged in a 14*14 square array. The diameter of the front is 128.8mm. figure 2 It is a schematic diagram of the unit structure of this embodiment, such as figure 2 As shown, each unit structure consists of a square substrate and a cuboid. The top and bottom surfaces of the rectangle are both square, and are arranged on the square dielectric substrate in such a manner that the center of the bottom surface and the center of the square substrate overlap, and the side length of the bottom surface is smaller than that of the square dielectric substrate. Each unit period is P=4.2mm, the material of the cuboid is alumina ceramics with a purity of 99% (dielectric cons...

Embodiment 2

[0040] In this embodiment, a TE with an operating frequency of 35 GHz is selected 01 Mode electromagnetic wave, as the input mode of the quasi-optical mode converter. like image 3 As shown, the mode converter is composed of 16*16 units with the same structure closely arranged in a square array, and the array aperture is 128.8mm. Figure 4 (a) the unit structure schematic diagram of the present embodiment, such as Figure 4 As shown in (a), each unit structure consists of a square substrate and an ellipsoid, and the ellipsoid is arranged on the positive substrate, and the center of the bottom surface overlaps with the center of the square substrate. The period of each unit is P=4.2mm, the material of the elliptical cylinder is alumina ceramics with a purity of 99.5% (dielectric constant ε=9.9), the long axis D 1 = 2.61mm, short axis d 1 =1.27mm, height H = 8.8mm, the base is quartz (dielectric constant ε = 4), the thickness is H s =15mm. The specific rotation angle of ea...

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Abstract

The invention discloses a transmission-type quasi-optical mode converter based on all media, and belongs to the technical field of microwave, millimeter wave and terahertz wave transmission. By utilizing the characteristic that the all-dielectric metasurface can effectively regulate and control electromagnetic characteristic parameters such as electromagnetic wave phase, polarization mode and propagation mode, the polarization direction and phase of the incident electromagnetic wave at the position of each unit structure are changed by regulating the parameters of each unit structure in the converter according to the incident condition of the electromagnetic wave; therefore, the whole electromagnetic wave mode is changed, and conversion from a rotating shaft symmetric working mode of the high-power microwave device to a Gaussian beam or a Gaussian-like beam is realized. Compared with the prior art, the mode converter has the advantages that the aspects of performance, compactness, design processing, cost and the like are considered at the same time, and the application range of the mode converter is widened.

Description

technical field [0001] The invention belongs to the technical field of high-power microwave, millimeter wave and terahertz wave transmission, and in particular relates to an all-dielectric transmission type quasi-optical mode converter for high-power microwave devices. Background technique [0002] The high-power microwave system is mainly composed of several subsystems such as high-power microwave source, mode changer, transmission and emission. Its peak power can reach more than 100MW, and its frequency range is between 1GHz and 300GHz. It has important applications in controlled thermonuclear fusion plasma heating, weapon rejection, high-resolution radar, and wireless communications. However, as the frequency increases to the millimeter wave and terahertz band, the size of conventional fundamental mode interaction vacuum electronic devices decreases sharply, and the power capacity decreases, which is not conducive to the generation of high frequency and high power electro...

Claims

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Application Information

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IPC IPC(8): H01P1/16H01P1/18H01Q15/00
CPCH01P1/16H01P1/18H01Q15/0086
Inventor 韩梦傅文杰鲁钝李云吉曾秋雨李召鄢扬
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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