Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Parameter related to the reproduction or fidelity of a...
Reexamination Certificate
2006-12-01
2009-06-30
Dole, Timothy J. (Department: 2831)
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Parameter related to the reproduction or fidelity of a...
C324S636000, C324S637000
Reexamination Certificate
active
07554339
ABSTRACT:
The “discrete frequency stir” (DFS) method provides improved mode stir testing of electromagnetic characteristics of an enclosure/cavity. Adequate sampling of the electric field inside the enclosure/cavity is provided by electronic perturbation or “stirring” of the field with a short duration, continuous wave, radiated source where the wave frequency is stepped in small steps across a frequency range of interest. The frequency steps are selected to be at least slightly larger than the resonant mode bandwidth associated with the given enclosure/cavity in order to provide statistically independent measurements. A stirring bandwidth is selected to encompass a statistically significant number of these measurement samples while maintaining adequate frequency resolution. A statistical evaluation of the measured field is then performed over this stirring bandwidth. For example, the average field level at a given frequency is determined by averaging over the samples contained within the stirring bandwidth when centered on that frequency.
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Horton Nathaniel T.
Lewis Dennis M.
Dole Timothy J.
Ostrager Chong & Flaherty & Broitman P.C.
The Boeing Company
Valone Thomas F.
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