Fecha de publicación: 18/10/2023 Fuente: Wipo "IOT" Technologies are generally described for passively powering wireless IoT devices. An actively powered transmitter may transmit a radio frequency (RF) signal over a common channel and information associated with parameters of a reply signal to various passively powered wireless devices. The wireless devices may extract power from the RF signal or other signals in the ambient environment, use the extracted power to perform operations, and backscatter a reply signal over a different channel defined by the RF signal. The reply signal from the passively powered wireless devices may be received by a base station or an actively powered device in the vicinity and forwarded to the base station. Various multiplexing schemes may be employed to prevent collision of reply signals from the passively powered wireless devices.