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:
Sep. 25, 2012
Filed:
Apr. 09, 2009
Stephen L. Judd, Los Alamos, NM (US);
Clifford M. Fortgang, Los Alamos, NM (US);
David C. Guenther, Los Alamos, NM (US);
Stephen L. Judd, Los Alamos, NM (US);
Clifford M. Fortgang, Los Alamos, NM (US);
David C. Guenther, Los Alamos, NM (US);
Los Alamos National Security, LLC, Los Alamos, NM (US);
Abstract
An apparatus and method for detecting solid-state electronic devices are described. Non-linear junction detection techniques are combined with spread-spectrum encoding and cross correlation to increase the range and sensitivity of the non-linear junction detection and to permit the determination of the distances of the detected electronics. Nonlinear elements are detected by transmitting a signal at a chosen frequency and detecting higher harmonic signals that are returned from responding devices.