公开(公告)号：US20240187986A1

公开(公告)日：2024-06-06

申请号：US18553617

申请日：2022-03-31

Applicant: The Regents of the University of California

Inventor： Manideep Dunna ,  Miao Meng ,  Po-Han Peter Wang ,  Chi Zhang ,  Patrick Mercier ,  Dinesh Bharadia

IPC: H04W52/02

CPC classification number: H04W52/0216 ,  H04W52/0235

Abstract: A method for waking a transceiver for communicating directly with commodity Wi-Fi transceivers (TRXs) via backscatter modulation in an integrated tag device includes sensing an incident Wi-Fi-compliant wake-up signal with a wake-up stage. Upon wake-up, a payload packet is sensed with a sync stage, the sync stage having higher bandwidth and power than the wake-up stage, the sync stage enabling a backscatter transmission circuit in sync with the payload. A backscatter transceiver includes a wake-up receiver having an energy-detection based architecture and having circuitry to conduct a counter-based wake up responsive to two pre-specified WiFi compatible packets. A sync receiver is enabled by the wake-up receiver upon reception of the two pre-specified WiFi compatible packets, the sync receiver including circuitry to detect a payload packet and create a backscatter enable signal synced with a payload of the payload packet. A backscatter transmitter is enabled by the backscatter enable signal.

公开(公告)号：US12267127B2

公开(公告)日：2025-04-01

申请号：US17666198

申请日：2022-02-07

Applicant: The Regents of the University of California

Inventor： Manideep Dunna ,  Miao Meng ,  Patrick P. Mercier ,  Dinesh Bharadia

IPC: H04B5/00 ,  H04B5/72 ,  H04B5/77 ,  H04B5/79 ,  H04W52/02 ,  H04B7/0413

Abstract: Termination circuits for backscatter communication in an integrated wake-up receiver tag device. A reflective termination circuit includes a first branch having an open load and a shorted load with first branch offset reflection coefficients and with a connection to an antenna. A second branch has a capacitive load and an inductive load with second branch offset reflection coefficients and with a connection to an antenna. A MIMO termination circuit includes plurality of transmission lines each providing a unique delay that is offset compared to other ones of the plurality of transmission lines. Switched connections to a corresponding array of antennas introduce a delay between a received and backscattered signal at each antenna in the array of antennas.

公开(公告)号：US20240206996A1

公开(公告)日：2024-06-27

申请号：US18554726

申请日：2022-04-08

Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA

Inventor： Agrim Gupta ,  Cedric Girerd ,  Manideep Dunna ,  Tania Morimoto ,  Dinesh Bharadia ,  Raghav Subbaraman ,  Qiming Zhang

IPC: A61B34/30 ,  A61B90/00 ,  G01L1/10 ,  G01L5/04

CPC classification number: A61B34/30 ,  G01L1/106 ,  G01L5/042 ,  A61B2090/064

Abstract: A wireless force sensor includes a flexible structure supported opposing a rigid structure with a gap between the flexible structure and the rigid structure. Contact traces on opposing surfaces of the flexible structure and the rigid structure form transmission lines. The contract traces are aligned to contact when a force is applied the flexible structure to cause contact between the traces on the opposing surfaces. Radio-frequency switches modulate a reflected signal from the transmission lines. An antenna receives an interrogation signal transmits the reflected signal.

公开(公告)号：US11546022B2

公开(公告)日：2023-01-03

申请号：US17244881

申请日：2021-04-29

Applicant: The Regents of the University of California

Inventor： Manideep Dunna ,  Chi Zhang ,  Dinesh Bharadia ,  Daniel Sievenpiper

IPC: H04B7/0413 ,  H01Q15/14

Abstract: In some example embodiments, there may be provided an apparatus. The apparatus may include a surface including at least one electro-magnetic reflective element programmed to provide a plurality of reflected signals, such that the plurality of reflected signals constructively adds at a location of a receiver of the plurality of reflected signals. Related systems, methods, and articles of manufacture are also described.

公开(公告)号：US20220255587A1

公开(公告)日：2022-08-11

申请号：US17666198

申请日：2022-02-07

Applicant: The Regents of the University of California

Inventor： Manideep Dunna ,  Miao Meng ,  Patrick P. Mercier ,  Dinesh Bharadia

IPC: H04B5/00 ,  H04W52/02

Abstract: termination circuits for backscatter communication in an integrated wake-up receiver tag device. A reflective termination circuit includes a first branch having an open load and a shorted load with first branch offset reflection coefficients and with a connection to an antenna. A second branch has a capacitive load and an inductive load with second branch offset reflection coefficients and with a connection to an antenna. A MIMO termination circuit includes plurality of transmission lines each providing a unique delay that is offset compared to other ones of the plurality of transmission lines. Switched connections to a corresponding array of antennas introduce a delay between a received and backscattered signal at each antenna in the array of antennas.

公开(公告)号：US20240178884A1

公开(公告)日：2024-05-30

申请号：US18387321

申请日：2023-11-06

Applicant: The Regents of the University of California

Inventor： Shih-Kai Kuo ,  Manideep Dunna ,  Dinesh Bharadia ,  Patrick Mercier

IPC: H04B7/04 ,  H04B7/06 ,  H04B7/22

CPC classification number: H04B7/04013 ,  H04B7/0617 ,  H04B7/22

Abstract: A beam-steering backscatter circuit in an integrated tag device. The circuit includes an antenna array and SP4T reflector array configured to receive and transmit through the antenna array. A baseband phase-shifting module modulates an incident signal based upon tag data to create an output signal and re-radiates the output signal with a controllable angle of direction through the SP4T reflector array. A phase locked loop synchronized with a wake-up receiver provides an intermediate frequency (IF) clock to the baseband phase shifting-module.

公开(公告)号：US20210344384A1

公开(公告)日：2021-11-04

申请号：US17244881

申请日：2021-04-29

Applicant: The Regents of the University of California

Inventor： Manideep Dunna ,  Chi Zhang ,  Dinesh Bharadia ,  Daniel Sievenpiper

IPC: H04B7/0413 ,  H01Q15/14

Abstract: In some example embodiments, there may be provided an apparatus. The apparatus may include a surface including at least one electro-magnetic reflective element programmed to provide a plurality of reflected signals, such that the plurality of reflected signals constructively adds at a location of a receiver of the plurality of reflected signals. Related systems, methods, and articles of manufacture are also described.