Electric Field Cage

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Security Lab

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Description

The Electric Field (E-field) Cage generates DC and low-frequency AC fields for sensor design, calibration, and evaluation. It is roughly analogous to an anechoic chamber for acoustic or radar measurements, or a Helmholtz coil system for quasi-static magnetic field measurements, in that it attenuates unwanted external fields and generates calibration-quality fields for testing in a laboratory environment. The E-field cage is essentially a large parallel-plate capacitor with guard rings to control fringing fields; however, the size of the cage and the spacing of the guard rings can be modified to accommodate the needs of individual tests. The cage can be run in a single-ended mode, for testing ground-based or aircraft-based sensors, or in a double-sided mode for testing projectile-based and other free-space sensors.

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