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Zero-refractive index meta-material flat waveguide-coupling whispering-gallery-mode sensor

A zero-refractive index, slab waveguide technology, applied in the analysis of materials, material analysis through electromagnetic means, instruments, etc., to achieve the effect of improving sensitivity and coupling efficiency

Active Publication Date: 2014-08-27
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report on the research on the dielectric ring that produces the whispering gallery mode in the zero-refractive-index metamaterial and its application in sensing technology.

Method used

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  • Zero-refractive index meta-material flat waveguide-coupling whispering-gallery-mode sensor
  • Zero-refractive index meta-material flat waveguide-coupling whispering-gallery-mode sensor
  • Zero-refractive index meta-material flat waveguide-coupling whispering-gallery-mode sensor

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example 1

[0024] figure 2 Among them, the upper and lower plates are perfect electric conductors (PEC, Perfect Electric Conductor), and the area 1 and area 3 filled with air are separated by area 2. Zero-index metamaterials (ε 3 ,μ 3 ) placed in the center with insulating medium (ε 1 ,μ 1 ) of the dielectric ring (ε 2 ,μ 2 ) constitutes area 2, and the inner and outer radii of the ring are a and b respectively;

[0025] In the structure, red copper is selected as the waveguide plate, which can be approximately considered as a perfect electric conductor in the microwave band. The corresponding propagation mode is TM mode, and the waveguide size is 120mm×45mm, a=12mm, b=15mm, ε 1r = 1.5, ε 2r =5,μ 1r =μ 2r = 1, ε 3r =μ 3r = 0.001. According to the literature [Yeh, C., Shimabukuro, F. The Essence of Dielectric Waveguides [M]. Springer: New York, NY, USA, 2008], the theoretical calculation formula of the resonance (characteristic) frequency is

[0026] | ...

example 2

[0028] Example 2: If artificial magnetizers are used to replace figure 2 For medium electric conductors, the corresponding propagation mode is TE mode. The theoretical calculation formula of the characteristic frequency is

[0029] | J m ( k 1 a ) - J m ( k 2 a ) - Y m ( k ...

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Abstract

The invention specifically relates to a zero-refractive index meta-material flat coupling microwave / millimeter wave whispering-gallery-mode sensor, which belongs to the technical field of microwave / millimeter wave detection. The middle part of a metal planar waveguide composed of a pair of red copper metal flats is filled with a zero-refractive index meta-material, a dielectric ring with a high dielectric constant is implanted into the zero-refractive index meta-material, the upper end of the dielectric ring is provided with a material inlet, the lower end of the dielectric ring is provided with a material outlet, the signal feed-in port and output port of the waveguide are located at positions where two sides of the zero-refractive index meta-material in the waveguide are connected with the red copper metal flats. The whispering-gallery-mode sensor provided by the invention is a sensing device with an improved coupling effect, improved sensitivity and capacity of realizing on-line, real-time, automatic and continuous detection.

Description

technical field [0001] The invention belongs to the technical field of microwave / millimeter wave detection, and in particular relates to a sensor for coupling a microwave / millimeter wave echoing gallery mode with a zero-refractive index metamaterial. technical background [0002] Whispering Gallery Mode (WGM, Whispering Gallery Mode) is a resonance mode generated in a medium with a high dielectric constant (relative to the background medium) in a closed shape. The distribution of the electromagnetic field in it depends on the specific shape. The commonly used one is a disc , ring, medium ball, etc. When the wave propagates in the annular medium, it undergoes multiple total reflections on both sides of the inner surface to form a whispering gallery mode. The whispering gallery mode belongs to the high-order angular mode of the ring structure dielectric resonator, and most of the electromagnetic energy is bound in the ring area in the resonant state. Dielectric resonators ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00
Inventor 曹斌照刘欣梁文娟杨毅彪
Owner TAIYUAN UNIV OF TECH