Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Microwave sensor for measuring biological sample dielectric property

A technology for microwave sensors and biological samples, which is applied in the measurement of electrical variables, measurement of resistance/reactance/impedance, and material analysis using microwave means. It is difficult to mass-produce, promote and use, and achieve the effects of online real-time broadband detection, low processing difficulty and simple structure

Inactive Publication Date: 2018-05-18
HENAN NORMAL UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Many dielectric measurement methods of biological samples use coplanar waveguide transmission lines and load microfluidic channels in the middle conduction band, but they do not take into account the enhancement of the electric field of the microfluidic channels, nor consider the impedance matching, resulting in the most electromagnetic interference on the entire detection device. The strong part is concentrated in the two transmission gaps of the coplanar waveguide transmission line, and the microfluidic channel needs to be processed by a special process, which greatly increases the processing cost and difficulty of the sensor, and is difficult to be used in mass production and in a large scale. It can only be used to test liquid samples

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Microwave sensor for measuring biological sample dielectric property
  • Microwave sensor for measuring biological sample dielectric property
  • Microwave sensor for measuring biological sample dielectric property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The specific content of the present invention will be described in detail in conjunction with the accompanying drawings. Such as figure 1 As shown, the microwave sensor of the present invention is composed of two layers, the bottom layer is a dielectric substrate 1, the upper layer is a metal layer 2, and a coplanar waveguide transmission line 3 is etched on the metal layer 2, which includes two signal transmission slots 4 , the middle conductive strip 5 and the metal ground 51, on the middle conductive strip 5 and away from the feeders at both ends, there are a plurality of open-circuited slot line branches 6 loaded in parallel, and the open-ended slot line branch 6 is provided with a The test area 7 of the biological sample is tested. If the biological sample to be tested is fluid, the biological sample to be tested can be loaded on the test area 7 by adding the bow-shaped micro-flow tube. If the biological sample to be tested is solid, it can be directly placed on th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
relative permittivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a microwave sensor for measuring the biological sample dielectric property. The microwave sensor comprises a coplanar waveguide transmission line and multiple open-ended slot line stubs which are connected in series and loaded on a conduction band in the middle of the coplanar waveguide transmission line, the open-ended slot line stubs are used for gathering electric fieldsso as to improve the accuracy and sensitivity of detection, the open-ended slot line stubs are provided with test areas used for placing tested biological samples, and an input port and an output port of the coplanar waveguide transmission line are connected with a vector network analyzer through SMA connectors respectively. The testing device is simple in structure and high in sensitivity, the open-ended slot line stubs on the sensor are machined through a traditional etching process, the price is low, the machining difficulty is low, batch production is facilitated, and online real-time wide-band detection can be achieved.

Description

technical field [0001] The invention belongs to the technical field of measuring devices for the dielectric properties of biological samples, and in particular relates to a microwave sensor for measuring the dielectric properties of biological samples. Background technique [0002] In the field of electromagnetic field biomedicine, the electrical measurement of biological samples has won the favor of many researchers because of its non-destructive, real-time online detection, label-free, and high accuracy. Various microwave devices for detecting biological samples have been continuously proposed. However, because the volume of biological samples is very small, and its volume is on the order of nanoliters, high requirements are placed on the sensitivity and accuracy of detection. Otherwise, the weak signals caused by these small volumes will be submerged in the background noise of the test device. Generally speaking, the measurement methods of dielectric properties of biolog...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N22/00G01R27/26
CPCG01N22/00G01R27/2623
Inventor 刘伟娜胥磊
Owner HENAN NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com