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. 23, 2021
Filed:
May. 23, 2019
Board of Trustees of Michigan State University, East Lansing, MI (US);
Premjeet Chahal, Okemos, MI (US);
Saikat Mondal, East Lansing, MI (US);
Board of Trustees of Michigan State University, East Lansing, MI (US);
Abstract
A harmonic tag system includes a harmonic tag and a first antenna configured to receive a fundamental signal and transmit an identifier of the harmonic tag at a fundamental frequency. The harmonic tag system includes an energy harvesting unit configured to convert the fundamental signal into power. The power activates a sensor. The harmonic tag system also includes a harmonic doubler configured to generate a harmonic signal at a harmonic frequency based on (i) the fundamental signal and (ii) a sequence. The harmonic tag system further includes a digital modulation unit configured to selectively trigger an activation of the harmonic doubler. The harmonic doubler is triggered sequentially in an off state and an on state, and the digital modulation unit produces the sequence. The harmonic tag system also includes a second antenna configured to transmit data of the sensor at the harmonic frequency.