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:
Mar. 27, 2012
Filed:
Apr. 21, 2009
Steven C. Tidrow, Edinburg, TX (US);
Frank Crowne, Laurel, MD (US);
Daniel Potrepka, Silver Spring, MD (US);
Bernard J. Rod, Potomac, MD (US);
Steven C. Tidrow, Edinburg, TX (US);
Frank Crowne, Laurel, MD (US);
Daniel Potrepka, Silver Spring, MD (US);
Bernard J. Rod, Potomac, MD (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
A detector for electromagnetic radiation such as millimeter wave and infrared employs a ring-shaped ferroelectric element having a temperature affected by an absorber for the radiation. The dielectric constant of the ferroelectric material is a strong function of the temperature near its Curie temperature. The resonant frequency of the ferroelectric element is detected by applying a swept-frequency signal to the circuit and detecting the frequency which enhances the energy of the pulse. A two-dimensional camera for the radiation employs a two-dimensional array of these ferroelectric resonant circuits and a system for rapidly interrogating their resonant frequencies on a sequential basis.