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A new high-precision dielectric constant test system based on microwave sensors

A technology of microwave sensor and dielectric constant, which is applied in the field of microwave and radio frequency, can solve the problems that have not been considered, and achieve the effects of reducing influence, portability, high resolution and processing precision

Active Publication Date: 2021-11-23
HANGZHOU DIANZI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

In addition, the existing microwave sensor measurement basically does not consider the influence of external factors, and environmental factors (temperature, humidity, etc.) are the main factors affecting sensor measurement, and the measurement error caused by environmental factors in some occasions cannot be ignored

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  • A new high-precision dielectric constant test system based on microwave sensors
  • A new high-precision dielectric constant test system based on microwave sensors
  • A new high-precision dielectric constant test system based on microwave sensors

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Embodiment Construction

[0053] The present invention will be described in further detail below with specific embodiments in conjunction with the accompanying drawings.

[0054] like Figure 8 As shown, the new high-precision dielectric constant test system based on microwave sensors includes a wide-bandwidth signal sweep source, a differential sensor, a frequency discrimination phase (data conversion) module, and a data storage module.

[0055] Wide-bandwidth dual-port signal sweeping source (or single-port sweeping source outputs two-way sweeping signals after passing through a power divider) outputs two equal-amplitude 0dBm measurement signals, which are input to differential sensors; differential sensors output two-way power signals to the frequency and phase detection (data conversion) module; the frequency and phase detection (data conversion) module outputs two DC voltage signals, which are finally stored in the data storage module. The data storage module can upload it to the client for data ...

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Abstract

The invention discloses a novel high-precision dielectric constant testing system based on a microwave sensor. The invention includes a wide bandwidth signal frequency sweep source, a differential sensor, a data conversion module and a data storage module. Since the reference resonator and measuring resonator of the differential sensor are placed with measured substances with different dielectric constants, there is a frequency difference between the two output power signals. The output signals of the two resonators are connected to the data conversion module, and finally The quantized relative frequency difference corresponding to the voltage peak offset signal, because the frequency difference corresponds to the quantized voltage peak offset signal one-to-one, and the frequency difference corresponds to the dielectric constant one-to-one, so the medium to be tested is inverted according to the voltage signal the dielectric constant. The invention overcomes the inconvenient feature that the existing sensors need to use a vector network analyzer to measure the sample to be tested, and the system can obtain the dielectric constant of the measured substance more conveniently, quickly and accurately without using the vector network analyzer.

Description

technical field [0001] The invention belongs to the field of microwave and radio frequency technology, and relates to a broadband frequency sweep source, a microwave resonator, a frequency and phase discrimination radio frequency circuit and a digital data storage circuit, in particular to a substrate integrated waveguide (substrate integrated waveguide-SIW) structure-based complementary The open-loop resonator (complementary split-ring resonator—CSRR) is a new type of microwave sensor and a high-precision radio frequency discrimination circuit for measuring the dielectric constant and permeability of magnetic media materials. Background technique [0002] As one of the important physical properties reflecting its electromagnetic properties, the permittivity of matter is an important link between matter and electromagnetic fields. Therefore, the study of permittivity is important in scientific research, industrial applications, biomedicine and national defense security It ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26
CPCG01R27/2623
Inventor 徐魁文姜浩段江波刘洋
Owner HANGZHOU DIANZI UNIV
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