Matt Reynolds

Matt Reynolds is an Associate Professor in the Department of Electrical and Computer Engineering at the University of Washington. He is also co-founder of the RFID systems firm ThingMagic Inc (acquired by Trimble Navigation), the energy conservation firm Zensi (acquired by Belkin), and the home sensing company SNUPI Inc (acquired by Sears). He is currently co-founder of the millimeter wave imaging firm ThruWave Inc.

Matt's research interests include millimeter-wave sensing and imaging, RFID, energy efficiency at the physical layer of wireless communication, and the physics of sensing and actuation. Matt received the Ph.D. from the MIT Media Lab in 2003, where he was a Motorola Fellow, as well as S.B. and M.Eng. degrees in Electrical Engineering and Computer Science from MIT. He is a Senior Member of the IEEE, has received five Best Paper awards, the 2018 and 2019 ACM Ubicomp 10-Year Impact Award, and has 76 issued US patents and over 88 pending patent applications.

• Electrical Engineering recognizes invaluable members of department
• Faculty receive Ubicomp's 10-Year Impact Award
• Graduate student team wins best poster award at IEEE conference
• SNUPI named "Technology Alliance Innovation Showcase Company of the Year"
• UW EE Shines in the 2015 CoMotion Presidential Innovation Fellow Awards

• Millimeter-Wave Compressive Imaging with Metamaterial Antennas
• MIMO Wireless Power Transfer for Mobile Devices
• Energy Efficient Modulated Backscatter Communication
• Wearable and Implantable Biomedical Devices

Millimeter Wave Imaging

• A. Pedross-Engel, C. Watts, and M. Reynolds, "A Two-Sided, Reflection-Based K-Band 3-D Millimeter-Wave Imaging System with Image Beat Pattern Mitigation", IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 11, pp. 5045-5056, 2021.
• (Invited Paper) A. Pedross-Engel, C. Watts, and M. Reynolds, "High-Throughput 3-D Millimeter-Wave Imaging of Packaged Goods", in Proceedings IEEE Radar Conference 2020.
• C. Watts, A. Pedross-Engel, and M. Reynolds, “Through-Wall K-Band and V-Band Synthetic Aperture Radar Imaging of Building Structures and Utility Infrastructure”, in Proceedings SPIE Defense and Commercial Sensing, April 14-18, 2019.
• A. Pedross-Engel, D. Arnitz, J. Gollub, O. Yurduseven, K. Trofatter, M. Imani, T. Sleasman, M. Boyarsky, X. Fu, D. Marks, D. Smith, and M. Reynolds, "Orthogonal Coded Active Illumination for Millimeter Wave, Massive-MIMO Computational Imaging With Metasurface Antennas", IEEE Transactions on Computational Imaging, vol. 4, no. 2, pp. 184-193, 2018.
• X. Fu, A. Pedross-Engel, D. Arnitz, C. Watts, A. Sharma, and M. Reynolds, "Simultaneous Imaging, Sensor Tag Localization, and Backscatter Uplink via Synthetic Aperture Radar", IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 3, pp. 1570-1578, 2018.
• A. Sharma, A. Pedross-Engel, D. Arnitz, C. Watts, D. Smith, and M. Reynolds, "A K-band Backscatter Fiducial for Continuous Calibration in Coherent Millimeter-Wave Imaging", IEEE Transactions on Microwave Theory and Techniques, vol. 66, no. 1, pp. 431-438, 2018.
• S. Devadithya, A. Pedross-Engel, C. Watts, and M. Reynolds, "GPU Accelerated Enhanced Resolution 3D SAR Imaging with Dynamic Metasurface Antennas", IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 12, pp. 5096-5103, 2017.
• A. Pedross-Engel, C. Watts, D. Smith, and M. Reynolds, "Enhanced Resolution Stripmap Mode using Dynamic Metamaterial Antennas", IEEE Transactions on Geoscience and Remote Sensing, vol. 55, no. 7, pp. 3764-3772, 2017.
• A. Pedross-Engel, D. Arnitz, and M. Reynolds, "Self-Jamming Mitigation via Coding for Millimeter Wave Imaging with Direct Conversion Receivers", IEEE Microwave and Wireless Components Letters, vol. 27, no. 4, pp. 410-412, 2017.
• J. Gollub, O. Yurduseven, K. Trofatter, D. Arnitz, M. Imani, T. Sleasman, M. Boyarsky, A. Rose, A. Pedross-Engel, H. Odabasi, T. Zvolensky, G. Lipworth, D. Brady, D. Marks, M. Reynolds, and D. Smith, "Large Metasurface Aperture for Millimeter Wave Computational Imaging at the Human-Scale", Scientific Reports, vol. 7, 42650, 2017.
• C. Watts, A. Pedross-Engel, D. Smith, and M. Reynolds, "X-band SAR imaging with a Liquid-Crystal Based Dynamic Metasurface Antenna", Journal of the Optical Society of America- B, vol. 34, pp. 300-306, 2017.
• T. Sleasman, M.F. Imani, W. Xu, J. Hunt, T. Driscoll, M. Reynolds, D.R. Smith, "Waveguide-fed Tunable Metamaterial Element for Dynamic Apertures", IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 606-609, 2016.
• J. Hunt, J. Gollub, T. Driscoll, G. Lipworth, A. Mrozack, M. Reynolds, D. Brady, and D. Smith, "Metamaterial microwave holographic imaging system," Journal of the Optical Society of America-A 31, 2109-2119 (2014).
• J. Hunt, T. Driscoll, A. Mrozack, G. Lipworth, M. Reynolds, D. Brady, D. Smith, "Metamaterial Apertures for Computational Imaging", Science, 18 January 2013: 339 (6117), pp. 310-313.

Wireless Power Transfer (WPT)

• G. Lipworth, D. Arnitz, J. Hagerty, D. Nash, Y. Urzhumov, R. Hannigan, C. Tegreene, and M. Reynolds, "A Large Planar Holographic Reflectarray for Fresnel-Zone Microwave Wireless Power Transfer at 5.8 GHz", in Proc. IEEE International Microwave Symposium (IMS) 2018.
• D. Smith, V. Gowda, O. Yurduseven, S. Larouche, G. Lipworth, Y. Urzhumov, and M. Reynolds, "An analysis of beamed wireless power transfer in the Fresnel zone using a dynamic, metasurface aperture", Journal of Applied Physics, vol. 121, 014901, 2017.
• D. Arnitz and M. Reynolds, "MIMO Wireless Power Transfer (WPT) for Mobile Devices", IEEE Pervasive Computing, vol. 15, no. 4, pp. 36-44, 2016.
• V. Gowda, O. Yurduseven, G. Lipworth, T. Zupan, M. Reynolds, and D. Smith, "Wireless Power Transfer in the Radiative Near Field", IEEE Antennas and Wireless Propagation Letters, vol. 15, pp. 1865-1868, 2016.
• G. Lipworth, J. Ensworth, K. Seetharam, J.S. Lee, P. Schmalenberg, T. Nomura, M. Reynolds, D. R. Smith, Y. Urzhumov, "Quasi-Static Magnetic Field Shielding Using Longitudinal Mu-Near-Zero Metamaterials", Scientific Reports 5, 12764 (2015), doi:10.1038/srep12764.
• G. Lipworth, J. Ensworth, K. Seetharam, D. Huang, J. S. Lee, P. Schmalenberg, M. Reynolds, D. R. Smith, and Y. Urzhumov, "Magnetic Metamaterial Superlens for Increased Range Wireless Power Transfer", Scientific Reports, 10 Jan 2014, doi:10.1038/srep03642
• S. Gollakota, M. Reynolds, J. Smith, D. Wetherall, "The emergence of RF-powered computing", IEEE Computer, vol.47, no.1, pp. 32-39, Jan. 2014
• D. Arnitz and M. Reynolds, "Multi-transmitter Wireless Power Transfer Optimization for Backscatter RFID Transponders", IEEE Antennas and Wireless Propagation Letters, vol. 12, pp. 849-852, 2013.

Backscatter Communication and Ultra-Low Power Sensing

• J. Rosenthal and M. Reynolds, "Hardware-Efficient All-Digital Architectures for OFDM Backscatter Modulators", IEEE Transactions on Microwave Theory and Techniques, vol. 69, no. 1, pp. 803-811, 2021
• J. Rosenthal and M. Reynolds, "A 1.0 Mbps 198 pJ/bit Bluetooth Low Energy (BLE) Compatible Single Sideband Backscatter Uplink for the NeuroDisc Brain-Computer Interface", IEEE Transactions on Microwave Theory and Techniques, 2019
• M. Reynolds, "A 2.4 GHz, Hybrid 10 Mbps BPSK Backscatter and 1 Mbps FSK Bluetooth TX with Hardware Reuse", IEEE Microwave and Wireless Components Letters, vol. 27, no. 12, pp. 1155-1157, 2017.
• J. Ensworth and M. Reynolds, "BLE-Backscatter: Ultra-low-power IoT nodes compatible with Bluetooth 4.0 Low Energy (BLE) smartphones and tablets", IEEE Transactions on Microwave Theory and Techniques, vol. 65, no. 9, pp. 3360-3368, 2017.
• I. Cnaan-On, S. Thomas, J. Krolik, and M. Reynolds, "Multichannel Backscatter Communication and Ranging for Distributed Sensing with an FMCW Radar", IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 7, pp. 2375-2383 (2015).
• S. Thomas, E. Wheeler, J. Teizer, M. Reynolds, "Quadrature Amplitude Modulated Backscatter in Passive and Semipassive UHF RFID Systems", IEEE Transactions on Microwave Theory and Techniques, vol. 60 no. 4, April, 2012, pp. 1175-1182.

Biomedical Applications

• (Invited Paper) G. Moore, J. Rosenthal, J.R. Smith, and M. Reynolds, "Adaptive Wireless Power Transfer and Backscatter Communication for Perpetual Operation of Wireless Brain-Computer Interfaces", Proceedings of the IEEE, vol. 110, no. 1, pp. 89-106, 2022.
• J. Rosenthal, A. Pike, S. Reyes, and M. Reynolds, "Electronic Mode Stirring for Improved Backscatter Communication Link Margin in a Reverberant Cavity Animal Cage Environment", IEEE Transactions on Antennas and Propagation, vol. 70, no. 1, pp. 621-630, 2022.
• J. Rosenthal and M. Reynolds, "A Dual-Band Shared-Hardware 900 MHz 6.25 Mbps DQPSK and 2.4 GHz 1.0 Mbps Bluetooth Low Energy (BLE) Backscatter Uplink for Wireless Brain-Computer Interfaces", in Proceedings IEEE RFID 2020.
• J. Rosenthal, A. Sharma, E. Kampianakis, and M. Reynolds, "A 25 Mbps, 12.4 pJ/bit DQPSK Backscatter Data Uplink for the NeuroDisc Brain Computer Interface", IEEE Transactions on Biomedical Circuits and Systems, 2019
• A. Sharma, E. Kampianakis, J. Rosenthal, A. Pike, A. Dadkhah, and M. Reynolds, "Wideband UHF DQPSK Backscatter Communication in Reverberant Cavity Animal Cage Environments", IEEE Transactions on Antennas and Propagation, vol. 67, no. 8, pp. 5002-5011, 2019.
• E. Kampianakis, A. Sharma, J. Arenas, and M. Reynolds, "A Dual-Band Wireless Power Transfer and Backscatter Communication Approach for Real-Time Neural/EMG Data Acquisition", IEEE Journal of RFID, vol. 1, no. 1, pp. 100-107, 2017.
• A. Sharma, E. Kampianakis, M. Reynolds, "A dual-band HF and UHF antenna system for implanted neural recording and stimulation devices", IEEE Antennas and Wireless Propagation Letters, vol. 16, pp. 493-496, 2016.
• J. Besnoff and M. Reynolds, "Single-Wire Radio Frequency Transmission Lines In Biological Tissue", Applied Physics Letters, vol. 106, 183705 (2015).
• (Invited paper) S. Thomas, R. Harrison, A. Leonardo, and M. Reynolds, "A Battery-Free Multi-Channel Digital Neural/EMG Telemetry System for Flying Insects", IEEE Transactions on Biomedical Circuits and Systems, vol. 6, no. 5, Oct. 2012, pp. 424-436.

Wireless Power Transfer

• US11,133,717. Wireless power systems including determination of channel transfer function from backscatter signals
• US10,958,108. Wireless power transfer management
• US10,938,249. Dynamic rectifier circuits with multiple-order timescale feedback controls
• US10,833,381. Metamaterial phase shifters
• US10,686,236. Systems and methods for phase shifting signals
• US10,622,845. Non-Gaussian beamforming for wireless power transfer optimization
• US10,530,194. System and methods for reducing scattering, reflection, or re-radiation of received RF energy
• US10,425,837. Time reversal beamforming techniques with metamaterial antennas
• US10,416,302. Metamaterial devices and methods of using the same
• US10,389,179. Wireless power transfer management
• US10,386,479. Metamaterial devices and methods of using the same
• US10,249,150. Systems and methods for reduced control inputs in tunable meta-devices
• US10,135,123. Systems and methods for tunable medium rectennas
• US9,800,059. Subscription based MISO and MIMO wireless energy transfer
• US9,754,139. Real-time wireless power transfer control for passive backscattering devices
• US9,618,552. Method and apparatus for measuring radio-frequency energy
• US9,599,605. System for ambient energy harvesting
• US9,397,522. Method and system to control ambient RF energy for wireless devices

Millimeter Wave Imaging

• US10,109,080. Multi-sensor compressive imaging
• US9,411,042. Multi-sensor compressive imaging
• US9,268,016. Metamaterial devices and methods of using the same

Backscatter Communication, RFID, and Ultra-Low Power Sensing

• US10,693,521. Devices and methods for backscatter communication using one or more wireless communication protocols including Bluetooth low energy examples
• US10,461,783. Radio frequency communication devices having backscatter and non-backscatter communication modes and hardware re-use
• US10,147,032. Low power radio frequency communication
• US10,079,616. Devices and methods for backscatter communication using one or more wireless communication protocols including Bluetooth Low Energy examples
• US9,818,273. Secure passive RFID tag with seal
• US9,754,202. Low power radio frequency communication
• US9,747,538. Low power radio frequency communication
• US9,355,545. Secure optionally passive RFID tag or sensor with external power source and data logging
• US9,245,159. Low power radio frequency communication
• US9,245,158. Low power radio frequency communication
• US9,240,823. Receiver, apparatus, and methods for wirelessly receiving data from a power infrastructure.
• US9,158,949. Low power radio frequency communication
• US9,064,396. Receiver, apparatus, and methods for wirelessly receiving data from a power infrastructure
• US8,938,367. Motion detecting device, method of providing the same, and method of detecting movement
• US8,886,489. Motion detecting method and device
• US8,576,075. Methods and apparatus for RFID tag placement
• US8,494,762. Sub room level indoor location system using wideband power line positioning
• US8,392,107. Sub-room-level indoor location system using power line positioning
• US8,330,580. Methods and apparatus for operating a radio device
• US7,999,658. Methods and apparatus for operating a radio device
• US7,961,078. Methods and apparatus for operating a radio device
• US7,898,391. Multi-reader coordination in RFID system
• US7,773,945. RFID Reader Front End
• US7,724,141. Dynamically reconfigurable antennas for RFID label encoders/readers
• US7,763,780. Methods and Apparatus for RFID Tag Placement
• US7,706,764. Systems and Methods for Active Noise Cancellation in an RFID Tag Reader
• US7,453,363. RFID reader system incorporating antenna orientation sensing
• US7,075,412. Methods and apparatus for operating a radio device

Sustainability Sensing: Disaggregation of Electricity, Water, and Gas Usage

• US10,459,012. System for monitoring electrical power usage of a structure and method of same
• US10,371,728. Self-calibrating contactless power consumption sensing
• US10,345,423. System and method for monitoring electrical power usage in an electrical power infrastructure of a building
• US10,247,765. Detecting actuation of electrical devices using electrical noise over a power line
• US9,857,449. System and method for monitoring electrical power usage in an electrical power infrastructure of a building
• US9,766,277. Self-calibrating contactless power consumption sensing
• US9,594,098. Systems and methods for measuring electrical power usage in a structure and systems and methods of calibrating the same
• US9,397,498. Systems and methods to emulate high frequency electrical signatures
• US9,250,275. Detecting actuation of electrical devices using electrical noise over a power line
• US9,222,816. Apparatus configured to detect gas usage, method of providing same, and method of detecting gas usage.
• US9,218,736. Sensor nodes, apparatuses, and methods for wirelessly transmitting data to a power infrastructure
• US8,972,211. System for monitoring electrical power usage of a structure and method of same
• US8,930,152. Whole structure contactless power consumption sensing
• US8,924,604. Systems and methods for data compression and feature extraction for the purpose of disaggregating loads on an electrical network
• US8,805,628. Systems and methods for measuring electrical power usage in a structure and systems and methods of calibrating the same
• US8,712,732. Electrical event detection device and method of detecting and classifying electrical power usage
• US9,618,553. Systems and methods for sensing environmental changes using light sources as sensors
• US8,587,148. Electric power supply and related methods
• US8,334,784. Detecting actuation of electrical devices using electrical noise over a power line
• US8,094,034. Detecting actuation of electrical devices using electrical noise over a power line

Biomedical Applications

• US9,579,036. Sensor for monitoring a condition of a patient