Novel method for testing ferromagnetic resonance line width of microwave ferrite material

A ferrite material, ferromagnetic resonance line technology, applied in the direction of magnetic performance measurement, etc., can solve the problems of reducing test accuracy, increasing the complexity of testers, increasing the uncertainty of measurement results, etc., to improve the accuracy, Improve measurement efficiency and test accuracy, and maintain the effect of stability

Inactive Publication Date: 2014-12-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a variety of devices and measuring instruments not only increase the cumbersome operation of the testers, but also increase the uncertainty of the measurement results and reduce the test accuracy.

Method used

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  • Novel method for testing ferromagnetic resonance line width of microwave ferrite material
  • Novel method for testing ferromagnetic resonance line width of microwave ferrite material
  • Novel method for testing ferromagnetic resonance line width of microwave ferrite material

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Embodiment Construction

[0023] After calibration, the Gauss meter probe is placed in a position where the magnetic field is uniform in the middle of the electromagnet poles. The vector network analyzer (4) is connected to the rectangular resonator (1) through a microwave cable, and the network card interface of the program-controlled computer (5) is connected to the vector The network card interface of the network (4) is connected, and the serial port of the computer (5) is connected with the serial port of the Gauss meter (2) by using an RS232 serial cable. Turn on the power of each instrument.

[0024] 1. The specific steps for testing the linewidth of microwave ferrite ferromagnetic resonance with a vector network analyzer are:

[0025] Step 1: Select the test frequency range and use SOLT to calibrate the vector network analyzer and cable.

[0026] Step 2: Put the sample pellet into the slot at the top of the sample holder, and seal the top with a small amount of vacuum grease to prevent the pell...

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Abstract

The invention discloses a rectangular resonant cavity system for testing parameters of a microwave ferrite material, belongs to the field of ferromagnetic resonance line width testing, and relates to rectangular perturbation resonant cavities. A novel method for testing the ferromagnetic resonance line width of the microwave ferrite material is provided to overcome the defects that according to original systems, operation is complicated, the uncertainty of measurement results is high, and testing accuracy is low. The rectangular resonant cavity system comprises a rectangular resonant cavity, a gauss meter, an electromagnet, a vector network analyzer, a program control computer and a direct-current power supply. After connection and calibration are conducted on the system, a test sample is placed in the rectangular resonant cavity, and then the ferromagnetic resonance line width of the test sample can be calculated simply by obtaining a Q value corresponding to a half-power point or an S21 parameter through testing.

Description

technical field [0001] The invention belongs to the field of microwave ferrite material parameter testing, and relates to ferromagnetic resonance line width parameter testing. Background technique [0002] Microwave ferrite materials can be divided into single crystal and polycrystalline materials according to their structure. Microwave ferrite devices made of single crystal materials are called single crystal devices. Common ones such as YIG electrical tuning filters, limiters, harmonic generators device, etc. The microwave devices using ferrite polycrystalline materials are called polycrystalline devices, such as phase shifters, circulators and isolators. [0003] The operating frequencies of these microwave devices cover the frequency bands from meter wave, centimeter wave to millimeter wave, and are indispensable devices in microwave and millimeter wave communication equipment and electronic systems. It has long been used in radar, electronic countermeasures and high-e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12
Inventor 李恩童超卢宪俊郑虎高源慈陶冰洁
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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