Patent ID: 9748632
Date: 2017-08-29
CPC Classifications: G06K,H01Q

Claim:
1. A wireless sensor comprises: an antenna operable to receive an inbound radio frequency (RF) signal and to transmit an outbound RF signal; a sensing element proximal to the antenna, wherein the sensing element, when sensing a first environmental condition, changes a characteristic of an RF front-end of the wireless sensor; a tuning circuit operably coupled to adjust the RF front-end to compensation for the change in the characteristic, wherein the RF front-end includes two or more of: the antenna, the sensing element, and the tuning circuit; a reference circuit block operable to generate a signal based on a low voltage low frequency input that corresponds to a second environmental condition; a processing module operably coupled to: a transmitter operable to generate the outbound RF signal, which includes at least one of the first and second digital values.