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High-Q active resonator used for simultaneously measuring dielectric constant and magnetic conductivity of magnetic medium material

A technology of dielectric constant and source resonator, applied in the microwave field, can solve the problem of low sensor resolution, and achieve the effect of ensuring accuracy, high sensitivity and Q value

Active Publication Date: 2019-08-23
HANGZHOU DIANZI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the no-load Q value of passive SIW resonators is usually limited to a few hundred, and the resolution of the sensor is generally not high

Method used

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  • High-Q active resonator used for simultaneously measuring dielectric constant and magnetic conductivity of magnetic medium material
  • High-Q active resonator used for simultaneously measuring dielectric constant and magnetic conductivity of magnetic medium material
  • High-Q active resonator used for simultaneously measuring dielectric constant and magnetic conductivity of magnetic medium material

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Embodiment Construction

[0029] The present invention will be described in further detail below with specific embodiments in conjunction with the accompanying drawings.

[0030] A high-Q active resonator consists of a passive resonator and a negative resistance circuit;

[0031] Such as figure 1 Shown is the schematic structural view of the passive resonator of the present invention, the passive resonator is a single-port device, including a microstrip line structure, a dielectric layer (i.e. a square PCB board 3), a metal sheet, and a grooved metal CSRR structure from the top layer to the bottom layer ;

[0032] The microstrip line structure is placed on the upper surface of the dielectric layer, and includes an input port, the port is used to connect to the SMA connector 1, and the SMA connector 1 communicates with the vector network analyzer;

[0033] Described input port is connected with microstrip line, and described microstrip line comprises a section of microstrip line I2 and a section of mi...

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Abstract

The invention discloses a high-Q active resonator for simultaneously measuring the dielectric constant and the magnetic conductivity of a magnetic medium material. The high-Q active resonator is composed of a passive resonator and a negative resistance circuit. The passive resonator comprises a microstrip line structure, a dielectric layer, a metal sheet and a notched metal CSRR structure. The notched groove metal CSRR structure is composed of a groove ring with an opening. Two right angles opposite to the opening of the groove ring are bent towards the inside of the ring, and the electric field intensity of the above region is the strongest for measuring the dielectric constant. Two right angles which are bent inwards are formed by a U-shaped structure which is horizontally overturned anda connecting plate. The opening of the groove ring respectively extends towards the inside and the outside of the ring, and the magnetic field intensity of the above region is the strongest for measuring the magnetic conductivity. According to the invention, the dielectric constant and the magnetic conductivity can be measured at the same time in different regions of the same sensor. Meanwhile, the measurement accuracy is ensured due to extremely high sensitivity and Q value. Therefore, the high-Q active resonator is very suitable for measuring magnetic medium materials with high dielectric constants and magnetic conductivity.

Description

technical field [0001] The invention belongs to the field of microwave technology, relates to a sensor for microstrip line excitation and negative resistance coupling, in particular to a substrate integrated waveguide (Substrate integrated waveguide-SIW)-based sensor for measuring the dielectric constant and permeability of magnetic medium materials High-efficiency miniaturized microwave sensors. Background technique [0002] Magnetic media materials play an increasingly important role in the fields of food industry, agricultural medicine, health care, national defense, etc., and the dielectric constant and permeability are two important parameters to describe the electromagnetic properties of magnetic media materials. Therefore, how to quickly and accurately measure the permittivity and permeability of magnetic media materials has become a hot spot of common concern in both academia and industry. [0003] Material characterization methods based on radio frequency and micro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P7/00H01P7/08
CPCH01P7/00H01P7/08
Inventor 赵文生范立超甘宏祎王高峰
Owner HANGZHOU DIANZI UNIV
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