Means and method for performing shielding effectiveness measurem

Details Means and method for performing shielding effectiveness measurem Means and method for performing shielding effectiveness measurem

1990-03-27

1990-09-04

Tarcza, Thomas H.

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

G01R 2700

Patent

active

H00008214

ABSTRACT:
A method of determining radiated shielding effectiveness for a piece of epment under test (EUT) utilizing a mode-stirred chamber. Radio frequency (rf) fields are transmitted from a broad band noise source into the mode-stirred chamber. A first paddle wheel tuner uniformly distributes the rf fields throughout the chamber. The EUT is housed in the chamber such that it is exposed to the transmitted rf fields. A second paddle wheel tuner and receiving antenna are mounted within the EUT to isolate them from the transmitted rf fields. The second paddle wheel uniformly distributes any rf fields that leak into the EUT and the receiving antenna is used to detect the rf leakage.

REFERENCES:
patent: 3581190 (1971-05-01), Brown
patent: 3946308 (1976-03-01), Miura et al.
patent: 4277741 (1981-07-01), Faxvog et al.
patent: 4530024 (1985-07-01), Brady, Jr.
patent: 4733165 (1988-03-01), Richardson et al.
patent: 4829233 (1989-05-01), Flemming et al.
patent: 4841223 (1989-06-01), Baum et al.

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