This paper presents an innovative test procedure for the prediction of the shielding effectiveness of small sample materials, consisting of a dielectric substrate coated with thin conducting film, in a wide frequency range up to 8 GHz. The proposed technique overcomes the limitations of the ASTM D4935 test method concerning the upper operating frequency and the required minimum specimen dimensions. A new high-order equivalent circuit model of the test fixture is developed. A correction factor is applied to the measured insertion loss to eliminate both the resonance peak below cutoff appearing in the high-frequency range and the low-frequency errors due to the weak capacitive coupling between the flanges of the coaxial cell. The accurate prediction of the shielding effectiveness of the test material against a plane wave is then derived from the insertion loss measurements.

Innovative test method for the shielding effectiveness measurement of conductive thin films in a wide frequency range / Sarto, Maria Sabrina; Tamburrano, Alessio. - In: IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY. - ISSN 0018-9375. - STAMPA. - 48:2(2006), pp. 331-341. [10.1109/temc.2006.874664]

Innovative test method for the shielding effectiveness measurement of conductive thin films in a wide frequency range

SARTO, Maria Sabrina;TAMBURRANO, Alessio
2006

Abstract

This paper presents an innovative test procedure for the prediction of the shielding effectiveness of small sample materials, consisting of a dielectric substrate coated with thin conducting film, in a wide frequency range up to 8 GHz. The proposed technique overcomes the limitations of the ASTM D4935 test method concerning the upper operating frequency and the required minimum specimen dimensions. A new high-order equivalent circuit model of the test fixture is developed. A correction factor is applied to the measured insertion loss to eliminate both the resonance peak below cutoff appearing in the high-frequency range and the low-frequency errors due to the weak capacitive coupling between the flanges of the coaxial cell. The accurate prediction of the shielding effectiveness of the test material against a plane wave is then derived from the insertion loss measurements.
2006
astm d4935 test method; electromagnetic compatibility; electromagnetic shielding; high-order equivalent circuit; measurement; shielding effectiveness (se); thin films
01 Pubblicazione su rivista::01a Articolo in rivista
Innovative test method for the shielding effectiveness measurement of conductive thin films in a wide frequency range / Sarto, Maria Sabrina; Tamburrano, Alessio. - In: IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY. - ISSN 0018-9375. - STAMPA. - 48:2(2006), pp. 331-341. [10.1109/temc.2006.874664]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/232205
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