METHOD OF ESTIMATING EFFICIENCY OF SCREENING DEVICES OF RADIOELECTRONIC EQUIPMENT Russian patent published in 2019 - IPC G01R29/08 G01R31/00 H05K9/00 

FIELD: electricity.

SUBSTANCE: invention relates to the field of development of devices for protection against electromagnetic radiation, namely to methods and devices for evaluation of efficiency of shielding devices, and can be used in development of protective coatings of radioelectronic equipment. Method of evaluating the efficiency of screening devices of radioelectronic equipment consists in the fact that to assess the efficiency of shielding devices of radioelectronic devices, an external electromagnetic field of a certain intensity is exposed to them and a screening coefficient is determined. To estimate the screening coefficient before performing measurements on the protected REE a set of test input signals X is sent, the response of the REE to the test action Y is recorded₀ as reference, after which on the REE, which is not protected by the screen, is exposed to microwave energy, the same set of test actions X is supplied and the responses of the REE to them are compared to Y₁ with reference Y₀, gradually increasing the microwave radiation power until the moment Y₁≠Y₀ (REE failure), microwave radiation power P₁, at which failure occurred in the operation of the radioelectronic device, stored, then placing the REE in the shielding device, the measurement procedure is repeated and the power of the microwave radiation P₂, at which failure of the shielded REE protection device has failed, the screening coefficient calculation corresponding to the specific design of the screening device under study is calculated using the following expression.

EFFECT: technical result is higher efficiency of evaluation of specific structures of screening devices, reduced requirements for measurement conditions and measuring equipment.

1 cl, 3 dwg