公开(公告)号：US11387850B2

公开(公告)日：2022-07-12

申请号：US16695758

申请日：2019-11-26

申请人： Board of Trustees of Michigan State University

发明人： Premjeet Chahal ,  Deepak Kumar ,  Saikat Mondal ,  Saranraj Karuppuswami

IPC分类号： H04B1/00 ,  H04B11/00 ,  H04B7/22

摘要： A multiband sensing system includes an active multiband sensing unit configured to transmit a radio frequency (RF) signal in multiple bands and communicate with a network. The active multiband sensing unit includes at least one transmitting antenna configured to transmit the RF signal. The multiband sensing system includes a passive multiband sensing unit including at least one receiving antenna configured to receive the RF signal, an acoustic actuator powered by the received RF signal including an actuating sensor element configured to actuate in response to receiving extracted modulated information of the RF signal, and an acoustic detector. The acoustic detector includes a detector transmitting antenna configured to backscatter a new frequency band signal to the active multiband sensing unit and a detector sensor element configured to sense data. The sensed data is modulated over the received RF signal to produce the new frequency band signal.