Microwave Sensors for Measuring Permittivity and Permeability of Magnetic Media Materials
A microwave sensor and permittivity technology, applied in the measurement of electrical variables, resistance/reactance/impedance, measurement devices, etc., can solve the problem of single sensor function, cannot measure permittivity and permeability at the same time, etc., to achieve sensitivity High, improve the quality factor, improve the effect of impedance matching
Active Publication Date: 2021-05-07
HANGZHOU DIANZI UNIV
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Therefore, the measurement of the permittivity and permeability of the magnetic medium material is independent of each other, and the sensor has a single function, which can only be aimed at the measurement of a certain parameter, and cannot measure the permittivity and permeability at the same time
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[0029] The present invention will be described in further detail below with specific embodiments in conjunction with the accompanying drawings.
[0030] Such as figure 1 Shown is the structure schematic diagram of the present invention, and the sensor of the present invention comprises the CSRR groove ring 8 that top layer microstrip line, middle layer PCB board 1, bottom metal sheet 7 are etched; Top layer microstrip line includes three section microstrip line I3 and Two sections of microstrip line Ⅱ5, between the first microstrip line Ⅰ and the first microstrip line Ⅱ5, between the third microstrip line Ⅰ and the second microstrip line Ⅱ5 are respectively connected by two 50Ω resistors 4, and the first The microstrip line Ⅰ and the second microstrip line Ⅰ, the second microstrip line Ⅰ and the third microstrip line Ⅰ are respectively connected through the metal patch 2, and the microstrip line Ⅰ 3 extends out of the feed long leg for connecting to the SMA connector 6; Metal...
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Abstract
The invention discloses a microwave sensor for measuring the dielectric constant and magnetic permeability of magnetic medium materials. Including a metal sheet with a pair of CSRR groove rings etched on the bottom layer, a PCB board on the middle layer, and a microstrip line on the top layer; the two ends of the entire microstrip line structure protrude from the feeder long legs to connect to the SMA connector, and the middle section of the microstrip line The line has two metal patches, and the two metal patches are respectively coupled to the two CSRR slot rings at the bottom layer; the slot ring has two sensitive areas, and the area between the outer slot ring opening slots is the area with the highest magnetic field strength. The sample to be tested is used to measure the magnetic permeability of the sample; the area between the grooves that are folded at right angles in the inner and outer groove rings is the area with the highest electric field strength, and the sample to be tested is placed in this area to measure the dielectric constant of the sample. The sensor has the function of measuring the permittivity and permeability of the magnetic medium material at the same time, not only has the excellent performance of high sensitivity and high precision, but also has a simple structure and strong practicability.
Description
technical field [0001] The present invention relates to a microstrip excitation sensor, in particular to a novel microwave sensor for measuring the permittivity and permeability of magnetic medium materials based on a complementary split-ring resonator (CSRR), belonging to field of microwave technology. Background technique [0002] With the rapid development of microwave technology in many industries (such as military, medical, food, chemical and meteorology, etc.), various types of radio frequency microwave devices have been gradually developed and applied. The electromagnetic properties of magnetic media materials greatly affect the performance parameters of equipment devices, so the research on the electromagnetic properties of magnetic media materials is very important. [0003] The electromagnetic properties of magnetic media materials are characterized by three parameters: permittivity ε, magnetic permeability μ, and electrical conductivity σ. Among them, permittivi...
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IPC IPC(8): G01R27/26G01R33/12
CPCG01R27/2623G01R33/1223
Inventor 甘宏祎赵文生王晶胡月王高峰
Owner HANGZHOU DIANZI UNIV