In this work we will expound a new measurement technique of the reflectivity, transmissivity, and shielding effectiveness of flat shields in reverberation chamber (RC), which employ an adeguate absorbing surface. For the measurement of the reflectivity and trasmissivity no restriction will need to such schields; whereas for the measurement of the shielding effectiveness of shields with losses, since is needed also the measurement of the attenuation through the schield, we must limit the application of the technique to reciprocal schields only; therefore such limitation isn’t present in the case of lossless schields. Because of the same measurement technique the parameters of reflectivity, trasmissivity and shielding effectiveness will all be defined in terms of whole (integral) power incident on the schield, trasmitted in the schield and on the other side of it, so the concerning measured values are mean values, and for this reason they are actually very meaningful. Therefore will be fulfilled the experimental part by means of tests in RC, carried out at the frequency of 10GHz, with respective data processing and presentation of the result. The shields used to the tests in RC are whether metallic, at grid, with mesh of various gradations, or of fabric schielding. Moreover one deem opportune to be precise that such new measurements technique has been conceived and carried out by writer during his collaboration to the paper [4] quoted in the bibliography, where it is also summarily mentioned.

METODOLOGIA DI MISURA DELL’EFFICACIA DELLO SCHERMAGGIO ELETTROMAGNETICO

GIFUNI, Angelo
2005-01-01

Abstract

In this work we will expound a new measurement technique of the reflectivity, transmissivity, and shielding effectiveness of flat shields in reverberation chamber (RC), which employ an adeguate absorbing surface. For the measurement of the reflectivity and trasmissivity no restriction will need to such schields; whereas for the measurement of the shielding effectiveness of shields with losses, since is needed also the measurement of the attenuation through the schield, we must limit the application of the technique to reciprocal schields only; therefore such limitation isn’t present in the case of lossless schields. Because of the same measurement technique the parameters of reflectivity, trasmissivity and shielding effectiveness will all be defined in terms of whole (integral) power incident on the schield, trasmitted in the schield and on the other side of it, so the concerning measured values are mean values, and for this reason they are actually very meaningful. Therefore will be fulfilled the experimental part by means of tests in RC, carried out at the frequency of 10GHz, with respective data processing and presentation of the result. The shields used to the tests in RC are whether metallic, at grid, with mesh of various gradations, or of fabric schielding. Moreover one deem opportune to be precise that such new measurements technique has been conceived and carried out by writer during his collaboration to the paper [4] quoted in the bibliography, where it is also summarily mentioned.
2005
88-89677-00-7
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11367/44249
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