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:
Feb. 12, 2013
Filed:
Dec. 22, 2009
Karl D. Brommer, Exeter, NH (US);
Candice L. Brittain, Nashua, NH (US);
Eldon M. Sutphin, Merrimack, NH (US);
Karl D. Brommer, Exeter, NH (US);
Candice L. Brittain, Nashua, NH (US);
Eldon M. Sutphin, Merrimack, NH (US);
BAE Systems Information and Electronic Systems Integrations Inc., Nashua, NH (US);
Abstract
A tag operates in an environment where transmitted interrogators are not possible or desired. High-efficiency diode rectifiers and low-power oscillators are used in combination with an energy storage element and hysteretic switch. The combination of multi-diode rectifier, low power tunnel diode oscillator, energy storage element and hysteretic switch allow for nanowatt levels of received RF power to be stored to produce micro-watts of RF transmit power. The device trickle charges off of ambient RF radiation until enough energy is stored for transmission.