US 11,700,010 B2
Batteryless wireless sensor device with clock extraction from energy harvesting source and impedance modulated data transmission
Phuong Huynh, Fairfax, VA (US)
Assigned to SIGMASENSE, LLC., Wilmington, DE (US)
Filed by SIGMASENSE, LLC., Wilmington, DE (US)
Filed on Aug. 29, 2022, as Appl. No. 17/897,304.
Application 17/897,304 is a continuation of application No. 17/514,041, filed on Oct. 29, 2021, granted, now 11,476,867.
Application 17/514,041 is a continuation of application No. 17/249,280, filed on Feb. 25, 2021, granted, now 11,374,587, issued on Jun. 28, 2022.
Prior Publication US 2022/0416802 A1, Dec. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 50/20 (2016.01); H03M 1/46 (2006.01); H04B 5/02 (2006.01); H04B 5/00 (2006.01); H02J 50/00 (2016.01)
CPC H03M 1/46 (2013.01) [H02J 50/001 (2020.01); H02J 50/20 (2016.02); H04B 5/0037 (2013.01); H04B 5/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A batteryless wireless sensor device comprising:
an impedance matching network operably coupled to an antenna and configured to receive a radio frequency (RF) signal that is transmitted from another device;
a power rectifier operably coupled to the impedance matching network and configured to harvest energy from the RF signal and generate a DC signal based on the energy harvested from the RF signal; and
a wireless sensor device operably coupled to the power rectifier and the impedance matching network, powered by the DC signal, and configured to:
perform digital sampling of a sensor signal of a sensor thereby generating sensor data; and
facilitate transmission of the sensor data to the another device by facilitating modulation of impedance of the impedance matching network to transmit the sensor data to the another device by facilitating reflection of energy of the RF signal that has been transmitted by the another device.