The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 28, 2000
Filed:
Dec. 11, 1998
Edward E Aslan, Plainview, NY (US);
L3 Communications Corporation, New York, NY (US);
Abstract
The electromagnetic radiation monitor includes a low frequency surface charge sensor, a high frequency sensor, and a lossy material sandwiched between the two sensors. The surface charge sensor responds to electromagnetic radiation from about 100 KHz to about 1 GHz. The high frequency sensor responds to frequencies from about 300 MHz to about 100 GHz. An output signal from the low frequency sensor is detected, and provided to an adjustable gain amplifier. An output signal from the high frequency sensor is similarly provided to a second adjustable gain amplifier. Output signals from the two amplifiers are summed by a summing circuit, whose output signal is provided to one input of a comparator circuit. The output signal from the comparator circuit triggers an audible or visible alarm from the alarm circuit when electromagnetic radiation detected by either or both of the low and high frequency sensors causes the output signal of the summer circuit to exceed a threshold.