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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-band transmission notch at a certain resonant frequency from

Method used

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

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Embodiment

[0030] Example: such as Figure 1 to Figure 3 As shown, the high-sensitivity microwave microfluidic sensor based on the improved split resonant ring is a dual-port device; it has a three-layer structure with a top layer, a middle layer and a bottom layer; the SMA connector 2 on the top layer is welded to the main microstrip line 3 two Side, the side microstrip line 4 and the IDC-SRR structure 7 are coupled next to the main microstrip line 3 with a distance of 0.2 mm. The middle layer is a Rogers 4350 dielectric board 1 and four metal vias 6 . A rectangular area is etched in the metal sheet 8 at the bottom layer, and there are two microstrip lines in the area, each connecting two via holes to the side microstrip line 4 and the IDC-SRR structure 7 at the top layer. Place a PDMS on the area 5 with the maximum electric field strength, and a microfluidic channel is dug inside, and slowly inject 0%-100% ethanol in 10 times through a 100mL syringe at the water inlet of the channel w...

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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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