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Metamaterial mode converter

A mode converter and mode conversion technology, applied in waveguide devices, electrical components, circuits, etc., can solve the problems of mode converter length reduction, long system structure, limited electromagnetic wave phase velocity difference, etc., and achieve high power capacity , compact structure, light weight effect

Active Publication Date: 2013-07-24
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limited phase velocity difference between electromagnetic waves in each partition, it is necessary to realize TEM-TE 11 The mode conversion requires a long system structure
In order to shorten the length of the plug-in structure, the article titled "L-band Magnetic Insulated Wire Oscillator Integrated Radiation Antenna" (Strong Laser and Particle Beam, Volume 20, No. 3, 2008, p435) proposed a plug-in and The structure of the combination of medium and phase shifting, the introduction of the phase shifting medium greatly reduces the length of the mode converter, but the power capacity problem is still the bottleneck of this type of structure

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Such as figure 2 As shown, each row of metal elements in the converter is composed of two semicircular metal rods and seven straight metal rods along the radial direction to form twelve fan-shaped grids arranged periodically along the circumferential direction; in this embodiment , the radius of the inner conductor is 68mm, and the radius of the outer conductor is 106mm; the axial period of the metal array elements is 20mm; in the mode conversion area, the grid opening angles in each row of metal array elements are equal to 30 degrees; each row of array elements is distributed at an angle Within the range of 180 degrees; the cross-section of the semicircle-arc metal rod and the straight metal rod are square, with a side length of 4mm; the center radii of the two semi-arc-shaped metal rods are 85mm and 94.5mm respectively. In the simulation calculation, the conversion efficiency of the mode converter is 97% at the center frequency of 1.53GHz, the power capacity is 2.5GW...

Embodiment 2

[0034] Such as image 3 As shown, the basic structure of this embodiment is the same as that of Embodiment 1, the difference is that the output port has no inner conductor, which is used to match and connect the hollow waveguide transmission structure.

[0035] In this embodiment, the radius of the inner conductor is 68 mm, and the radius of the outer conductor is 106 mm; in the mode conversion zone, the axial period of the metal array elements is 20 mm; the grid opening angles in each row of metal array elements are equal to 30 degrees; The elements are distributed within the range of 180 degrees in the angular direction; the cross-section of the semicircular metal rod and the straight metal rod are square, and the side length is 4mm; the center radii of the two semicircular metal rods are 85mm and 94.5mm respectively; the mode conversion area The rear inner conductor is a tapered structure with a top radius of 40mm and a length of 20mm. The mode converter has a conversion ef...

Embodiment 3

[0037] Such as Figure 4 As shown, the basic structure of this embodiment is the same as that of Embodiment 1, the difference is that there is no inner conductor at the input port, which is used to match and connect the transmission structure of the hollow waveguide.

[0038]In this embodiment, the radius of the inner conductor is 68 mm, and the radius of the outer conductor is 106 mm; the inner conductor in front of the mode conversion zone is a tapered structure, its top radius is 40 mm, and the length is 20 mm; in the mode conversion zone, the axial period of the metal array element is 20 mm ; The grid opening angles in each row of metal array elements are equal to 30 degrees; each row of array elements is distributed within the range of 180 degrees in the angular direction; the cross-section of the semicircular metal rods and straight metal rods is square, and the side length is 4mm; the center radii of the two semicircular metal rods are 85mm and 94.5mm respectively. The...

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Abstract

The invention discloses a metamaterial mode converter and belongs to the field of microwave transmission. The metamaterial mode converter comprises an inner conductor, an outer conductor and a metamaterial, wherein the inner conductor is cylindrical, the outer conductor is barrel-shaped, and the inner conductor is inserted into the outer conductor, and is coaxial with the outer conductor; the metamaterial is constituted by metal array elements cyclically distributed along the axial direction and is connected to the inner wall of the outer conductor; the sizes of the inner and outer conductors are adjustable, the number of cycles and the size of the metal array elements of the metamaterial are adjustable; and the mode converter disclosed by the invention has a compact structure, higher power capacity and can finish the mode conversion within the length of about one third of the wavelength on the premise that the lateral dimension of the system is not increased, so that the metamaterial mode converter can be well applicable to compact type narrow band high-power microwave transmission and emitting systems with small sizes and light weights.

Description

technical field [0001] The invention belongs to the technical field of microwave transmission and microwave antenna, and in particular relates to a metamaterial mode converter. The invention can be applied to transmission and emission systems in the high-power microwave technical field. Background technique [0002] Metamaterials refer to materials constructed by artificial engineering methods with extraordinary properties that ordinary natural materials do not have. Generally, metal, dielectric material or a special structure combining the two is used as the array element, and the physical properties that cannot be obtained by general traditional materials can be obtained by carefully designing and arranging each array element. Different from general materials, the properties of metamaterials are not determined by its chemical composition, but by its geometric structure; the shape, size, orientation and arrangement of its array elements will affect the electromagnetic waves...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P1/16
Inventor 秦奋王冬
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS