High-sensitivity microwave microfluidic sensor based on improved split-ring resonator

A split resonant ring, high-sensitivity technology, applied in the microwave field to reduce equipment sensing costs, avoid errors, and reduce detection accuracy

Pending Publication Date: 2022-04-15
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of these planar sensors are designed to generate a stop

Method used

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  • High-sensitivity microwave microfluidic sensor based on improved split-ring resonator
  • High-sensitivity microwave microfluidic sensor based on improved split-ring resonator
  • High-sensitivity microwave microfluidic sensor based on improved split-ring resonator

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Example Embodiment

[0030] Example: Figure 1 to 3 As shown, based on the high sensitivity microwave microfluidic sensor of improved opening resonant rings, it is a dual port device; it is a three-layer structure having a top layer, an intermediate layer, and a bottom layer; the SMA connecting head 2 located on the top layer is soldered in the main micropipe 3 On the side, the side micropipe lines 4 and the IDC-SRR structure 7 are coupled to the main microproject line 3, and the spacing is 0.2 mm. The intermediate layer is Rogers 4350 dielectric plate 1 and four metal via 6. A rectangular region is etched in the metal sheet 8 of the underlying layer, and there are two microstrip lines in the region, each connected to the two through holes to communicate into the side micropipe 4 and the IDC-SRR structure 7. Place a PDMS on the upper surface of the electric field strength, internal digging with a microfluidic passage, at 10% concentration of 10% by 100 ml of injectors, and is separated from 0% -100% et...

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Abstract

The invention discloses a high-sensitivity microwave microfluidic sensor based on an improved split-ring resonator, which is provided with a three-layer structure, the top layer comprises two microstrip lines, a metal sheet, an IDC-SRR structure and an SMA connector, each microstrip line is provided with an input port and an output port, the input port and the output port are respectively connected with the SMA connector, the SMA connector is communicated with a vector network analyzer, and the vector network analyzer is communicated with the IDC-SRR structure. The IDC-SRR structure is provided with PDMS, and a microfluid channel is formed in the PDMS; the middle layer comprises a dielectric plate with four metal through holes; the bottom layer comprises a metal sheet, two microstrip lines and an SRR structure, and an etching region is formed in the middle of the metal sheet; the four metal through holes are communicated with the top layer and the bottom layer; one end of the SRR structure is connected with the interdigital capacitor of the IDC-SRR on the top layer through two metal through holes, and the other end of the SRR structure is connected with the metal sheet on the top layer through the other two metal through holes. The sensor is high in sensitivity, wide in measurement range and small in detection error, and ensures the detection result.

Description

technical field [0001] The invention relates to the field of microwave technology, in particular to a high-sensitivity microwave microfluidic sensor based on an improved split resonant ring. Background technique [0002] In recent years, metamaterial-based microwave resonators have become an excellent choice for sensor applications in planar technologies due to their small size, light weight, ease of fabrication, and low cost. Most of these planar sensors are designed to generate a stop-band transmission notch at a certain resonant frequency through electrical or magnetic coupling generated by metamaterial elements loaded onto the transmission line. When materials with different dielectric constants are in contact with the resonator, the purpose of detection is achieved by changing the final notch frequency point by changing the nearby electric field. [0003] In recent years, sensors based on split-ring resonator-SRR and complementary split-ring resonator-CSRR have receive...

Claims

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Application Information

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IPC IPC(8): G01N22/00
CPCY02D30/70
Inventor 赵文生叶威王大伟王晶王高峰
Owner HANGZHOU DIANZI UNIV
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