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Electromagnetic measurement comprehensive darkroom for electromagnetic compatibility test and antenna measurement

A technology for electromagnetic measurement and antenna measurement, which is applied in the field of electromagnetic measurement comprehensive darkroom and shielded darkroom, which can solve the problem of not combining the two into one.

Active Publication Date: 2010-06-23
NORTHERN ENG DESIGN & RES INST CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

The essence is that they are built and used separately, and they have not been truly combined into one.

Method used

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Embodiment Construction

[0011] The electromagnetic measurement comprehensive anechoic chamber is a cuboid, and the structural size is the union of the space required for the electromagnetic compatibility test and the antenna measurement, so as to meet the requirements of the electromagnetic compatibility test and meet the antenna frequency, caliber and test requirements in the full anechoic chamber. The purpose of the test environment with different requirements caused by the difference in accuracy. The top and four sides of the darkroom are covered with full-band absorbing materials, and the bottom of the darkroom is covered with movable full-band absorbing materials. The shape of the unit body of the full-band wave-absorbing material is a quadrangular pyramid, and the opening angle at the top should be between 17° and 20°. The wave-absorbing material uses non-woven fabric as the carrying base material, and the absorbing material with different resistance values ​​can be obtained by adjusting the di...

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Abstract

The invention discloses an electromagnetic measurement comprehensive darkroom for electromagnetic compatibility test and antenna measurement. The structure is that the top surface and all side surfaces of the darkroom are fully paved with full-frequency-band wave-absorbing materials, and the bottom surface of the darkroom is fully paved with movable full-frequency-band wave-absorbing material; the full-frequency-band wave-absorbing material unit is of the tetraquetrous cone shape, the top opening angle is 17-20 degrees, the surface resistance is 50-100ohm, and non-woven fabrics serve as the bearing base material. The electromagnetic measurement comprehensive darkroom can meet the test environment required by the electromagnetic compatibility test and the antenna measurement at the same time, one room has two functions, and the cost can be saved compared with constructing an electromagnetic compatibility darkroom and a full-anechoic darkroom respectively; meanwhile, the relevant costs of land utilization, subsequent maintenance and the like can be saved.

Description

technical field [0001] The invention relates to a shielding darkroom in the field of electromagnetic measurement, in particular to an electromagnetic measurement comprehensive darkroom capable of electromagnetic compatibility testing and antenna measurement. Background technique [0002] At present, the general electromagnetic compatibility chamber (EMC) is used to test the radiation and immunity of electrical products. Its operating frequency range is 30MHz-1GHz, and it is required to meet the requirement that the field uniformity deviation is less than 0-6dB, the normalized site attenuation deviation is between ±4dB, and the background noise level of the measurement space should be less than the standard limit of 6dB or more. The main point of its design is to simulate the propagation of the open test field. Since the frequency band used in the EMC test area is 30MHz-1GHz, its antenna has poor directivity and strong diffraction ability. The main considerations in the desi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R29/08H04B17/00
Inventor 李自强赵天良胡细春贾永杰郑彤芳
Owner NORTHERN ENG DESIGN & RES INST CO LTD
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