Method for shielding capacity test of shielding dress for preventing electromagnetic radiation

A technology of anti-electromagnetic radiation and shielding effectiveness, applied in the fields of electromagnetic field characteristics, antenna radiation patterns, etc., can solve the problems of expensive anechoic chambers and expensive instruments, and achieve the effects of true and reliable test results, improved uncertainty, and reduced power

Inactive Publication Date: 2009-05-06
上海添香实业有限公司
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  • Abstract
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Problems solved by technology

The traditional method is to test in an anechoic chamber, but the cost of the anechoic chamber is expensive, and the equipment used is also very expensive

Method used

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  • Method for shielding capacity test of shielding dress for preventing electromagnetic radiation
  • Method for shielding capacity test of shielding dress for preventing electromagnetic radiation
  • Method for shielding capacity test of shielding dress for preventing electromagnetic radiation

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0019] The signal generator used is a 9kHz-1GHz RF signal generator with 50Ω impedance, adjustable output level, and the maximum output level is 1 milliwatt (0dB m ), can output sine wave waveform.

[0020] The power amplifier used is a power amplifier with a power of 10W, an impedance of 50Ω, a frequency of 1-1000MHz, and a gain of not less than 43dB.

[0021] The receiver used is a 9kHz~1GHz spectrum analyzer, and the average noise level is ≤—100dB m , a resolution bandwidth of 100Hz or less.

[0022] Several receiving antennas are used to adapt to different frequencies from 1 to 1000 MHz, and electric small dipole antennas can be used. Magnetic field shielding effectiveness at low frequencies can also be tested using a small magnetic dipole ...

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Abstract

The invention relates to a shielding effect testing method of an electromagnetic radiation resistance shielding clothes, which is characterized in that a GTEM small chamber is used for replacing a half electric wave dark chamber or a wide testing field to teat, the method uses a smaller-space gigahertz transverse electromagnetic wave small chamber (the GTEM small chamber) to replace the electric wave dark chamber, and needed instrument devices are cheaper than the original instrument devices. Compared with the traditional method, the shielding effect testing method has lower cost of a testing device of a whole system, which is one fifth to one tenth of the cost of the traditional method.

Description

technical field [0001] The invention relates to a method for testing the shielding effectiveness of electromagnetic radiation shielding clothing. Background technique [0002] The shielding effectiveness of anti-electromagnetic radiation shielding clothing is the most important parameter in shielding clothing testing. The traditional method is to test in an anechoic chamber, but the cost of the anechoic chamber is expensive, and the price of the instruments used is also very expensive. [0003] In some test occasions, attempts have been made to replace anechoic chambers (or open test fields) with gigahertz transverse electromagnetic wave cells (GTEM cells). For example, the authorized announcement date is July 27, 2005, and the authorized announcement number is a Chinese invention patent of CN1212521C, which discloses a linear method for radiated EMI testing using a GTEM chamber, in which the GTEM chamber is used. Contents of the invention [0004] The technical problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/08G01R29/10
Inventor 黎国栋许涛芳
Owner 上海添香实业有限公司
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