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Super-small resonant cavity

A resonant cavity and ultra-small technology, applied in the field of resonant cavity, can solve the problem of resonant cavity miniaturization and resonant cavity cannot be processed and manufactured, and achieve the effect of easy manufacture and wide application field

Inactive Publication Date: 2007-08-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the resonant cavity has a theoretical size limit for miniaturization and the miniaturized resonant cavity based on the three-dimensional heterotropic medium cannot be processed and manufactured under the existing technical level, the present invention proposes an ultra-small resonant cavity

Method used

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specific Embodiment approach 1

[0009] Specific Embodiment 1: Referring to FIG. 1 , in this embodiment, there is a negative magnetic permeability medium 2 occupying the space on the left side in the cavity of the micron-wave or millimeter-wave resonant cavity 1 .

[0010] The theoretical derivation used to determine the above design is as follows:

[0011] According to the electromagnetic field theory, the ultra-small resonant cavity will have the same resonance characteristics as the electromagnetic equivalent diagram shown in Figure 5

[0012] Region II in Fig. 5 describes the resonant cavity filled with common medium, and region I describes the resonant cavity filled with negative permeability medium, and the total thickness of the two regions is much smaller than half the working wavelength. Suppose there is a current source in X direction between I and II (Z=0), and its surface current density is J s (x, y, z) = I 0 δ(z), then the electromagnetic fields generated by the current source in region I and ...

specific Embodiment approach 2

[0026] Specific embodiment 2: With reference to Fig. 2, Fig. 3 and Fig. 4, the difference between this embodiment and specific embodiment 1 is that the negative magnetic permeability medium 2 is embedded between the non-magnetic fillers 4 by multi-layer alternate grids 3 The grid 3 is a sheet-shaped frame made of conductive material with at least two fractures, the fractures of each grid 3 and the fractures of the adjacent grid 3 are arranged in a staggered manner, and the other composition and connection relationship are the same as the specific embodiment One is the same. According to tests, this structure can produce one-dimensional negative magnetic permeability in the front and rear directions, and has a simple structure and is easy to manufacture.

specific Embodiment approach 3

[0027] Specific embodiment three: with reference to Fig. 2 and Fig. 4, the difference between this embodiment and specific embodiment one and two is that the non-magnetic filler 4 is a Teflon material, and other composition and connection relations are the same as those of specific embodiment one and two same. Teflon material has excellent anti-aging properties.

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Abstract

This invention relates to a super-small resonator including a mum or a mm wave resonator with a negative permeability medium occupying the left space, in which, the resonant frequency of a resonator does not rely on the size of the resonator any more and one dimension structure is prior for the applied inverted medium (negative dielectric medium and negative permeability medium) according to the tunnel effect generated at the cross of the media.

Description

technical field [0001] The invention relates to a resonant cavity, in particular to an ultra-small micron-wave and millimeter-wave resonant cavity. Background technique [0002] Anisotropic medium is a new type of artificial electromagnetic medium with periodic structure that appeared in the late 1990s. It has both negative permittivity and negative magnetic permeability, resulting in the electric field E of the electromagnetic wave propagating in the medium, The magnetic field H and the wave vector k form a left-handed system, instead of following the right-handed rule of conventional media, so it is also called an anisotropic medium. At present, with the deepening of people's understanding of heterotropic media, the connotation and extension of the concept of heterotropic media are constantly expanding. Anisotropic media does not only refer to media with negative permittivity and negative magnetic permeability at the same time. Metamedia with negative permittivity alone o...

Claims

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Application Information

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IPC IPC(8): H01P7/00H01P7/10
Inventor 吴群孟繁义傅佳辉杨国辉
Owner HARBIN INST OF TECH
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