A Calibration Method for Concentric Cone TEM Chamber Field Uniformity

A calibration method and uniformity technology, applied in the field of concentric cone TEM chamber field uniformity calibration, can solve the problems of slow speed and low accuracy

Active Publication Date: 2021-11-26
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Application Information

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Problems solved by technology

[0007] In view of this, this application provides a concentric cone TEM chamber field uniformity calibration method to solve the problems of low accuracy and slow speed of existing calibration methods

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  • A Calibration Method for Concentric Cone TEM Chamber Field Uniformity
  • A Calibration Method for Concentric Cone TEM Chamber Field Uniformity
  • A Calibration Method for Concentric Cone TEM Chamber Field Uniformity

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Embodiment Construction

[0024] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0025] The technical solutions provided by various embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0026] figure 1 Schematic diagram of field uniformity calibration for the GTEM chamber.

[0027] According to the method described in the international standard IEC61000-4-20, th...

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Abstract

This application discloses a method for calibrating the field uniformity of a concentric cone TEM chamber, which includes: placing a field strength probe in the center of the field uniformity area of ​​the concentric cone TEM chamber, which is recorded as the initial position; adjusting the input frequency of the TEM chamber to the lower limit test frequency, feeding A constant forward power capable of producing a standard field strength, recording the field strength readings and forward power at the initial position; keeping the forward power constant, determining the first position, the second position, The third position and the fourth position, the size of the area formed by the four positions can surround the field strength probe, and the absolute value of the field strength difference from the initial position is not greater than the set range; adjust the input frequency step by step to the upper limit of the test frequency, repeat Through the above steps, a homogeneous area of ​​the field in the concentric cone TEM chamber is obtained. This application fills in the blank of field uniformity calibration method for concentric cone TEM chamber, and can quickly and accurately perform field uniformity calibration.

Description

technical field [0001] The present application relates to the field of field uniformity calibration, in particular to a field uniformity calibration method for a concentric cone TEM chamber. Background technique [0002] According to the IEC61000-4-20 standard, the field uniformity of the TEM chamber is calibrated by the constant power method and the constant field strength method. The constant power calibration method is to input a constant forward power to the port of the TEM chamber, and then use a calibrated field strength probe to measure each position point in each frequency band with a specified step size. [0003] The calibration procedure is: place the field probe at a measurement point in the TEM room, adjust the frequency of the signal generator to the lower limit frequency of the test frequency range; input a constant forward power to the port of the TEM to make the field strength of the field probe spindle When the reading is within the field strength range all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/08G01R35/00
CPCG01R29/0828G01R35/007
Inventor 彭博黄承祖刘星汛齐万泉
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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