
Amin Arbabian
Associate Professor of Electrical Engineering
Academic Appointments
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Associate Professor, Electrical Engineering
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Member, Bio-X
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Member, Cardiovascular Institute
Honors & Awards
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Tau Beta Pi Award for Excellence in Undergraduate Teaching, Stanford University (June 2016)
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Best Paper Award, IEEE Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (2016)
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Best Paper Award, Progress in Electromagnetic Research Symposium (PIERS) (2015)
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NSF CAREER Award, National Science Foundation (2015)
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Best Paper Award, IEEE VLSI Circuits Symposium (2014)
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Faculty Research Award, Google (2014)
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Young Faculty Award (YFA), DARPA (2014)
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Best Paper Award, IEEE International Conference in Ultra-Wideband (2013)
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Hellman Faculty Scholar, Hellman Family Faculty Fund; Stanford University (2013)
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School of Engineering Terman Fellow, Stanford University (2012)
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Best Paper Award (2nd Place), IEEE Radio Frequency Integrated Circuits (RFIC) Symposium (2011)
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Jack Kilby Outstanding Student Paper Award, IEEE International Solid-State Circuits Conference (2010)
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Best Paper Award (2nd Place), IEEE Radio Frequency Integrated Circuits (RFIC) Symposium (2008)
Boards, Advisory Committees, Professional Organizations
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Associate Editor, IEEE Solid-State Circuits Letters (2018 - Present)
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Associate Editor, IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology (2017 - Present)
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Member of steering committee, IEEE RFIC Symposium (2017 - Present)
Program Affiliations
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Stanford SystemX Alliance
Professional Education
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BSc, Sharif University of Technology, Electrical Engineering (2005)
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MSc, UC Berkeley, Electrical Engineering and Computer Sciences (2007)
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PhD, UC Berkeley, Electrical Engineering and Computer Sciences (2011)
Current Research and Scholarly Interests
My group's research covers circuit and system design for (1) biomedical, (2) sensing, and (3) Internet of Things (IoT) applications.
On the biomedical front we explore the design of emerging and hybrid medical imaging modalities and investigate new technologies for wireless implants, including ultrasonic power and data links.
Our work in sensing includes methods to enable next-generation interfaces (e.g., radar system design for human-computer interfaces), as well as methods of remote detection and imaging.
In the IoT area, we work on architectural solutions that enable radically miniaturized sensors for a trillion-sensor (tera-scale) future, including wireless power and wake-up radios. On the other end of the IoT space, we also work on next-generation extremely-high-throughput wireless and wireline “pipelines” that facilitate information flow on the network.
2019-20 Courses
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Independent Studies (5)
- Special Studies and Reports in Electrical Engineering
EE 191 (Aut, Win, Spr, Sum) - Special Studies and Reports in Electrical Engineering
EE 391 (Aut, Win, Spr, Sum) - Special Studies and Reports in Electrical Engineering (WIM)
EE 191W (Aut, Win, Spr, Sum) - Special Studies or Projects in Electrical Engineering
EE 190 (Aut, Win, Spr, Sum) - Special Studies or Projects in Electrical Engineering
EE 390 (Aut, Win, Spr, Sum)
- Special Studies and Reports in Electrical Engineering
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Prior Year Courses
2018-19 Courses
- Fundamentals of Analog Integrated Circuit Design
EE 114, EE 214A (Aut)
2017-18 Courses
- RF Integrated Circuit Design
EE 314A (Spr)
2016-17 Courses
- Fundamentals of Analog Integrated Circuit Design
EE 114, EE 214A (Aut) - RF Integrated Circuit Design
EE 314A (Spr)
- Fundamentals of Analog Integrated Circuit Design
Stanford Advisees
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Doctoral Dissertation Reader (AC)
Gabe Buckmaster, Pietro Caragiulo, Charles Chen, Albert Gural, Steven Herbst, Elton Ho, Huseyin Inan, Hamid Partovi, Gerard Touma, Stephen Weinreich, Yinuo Xu -
Postdoctoral Faculty Sponsor
Aslan Etminan, Christopher Sutardja, Pyungwoo Yeon -
Doctoral Dissertation Advisor (AC)
Okan Atalar, Spiros Baltsavias, Jerry Chang, Soheil Hor, Angad Rekhi, Ahmed Sawaby, Mahmoud Sawaby, Miaad Seyed Aliroteh, Ajay Singhvi, Ernest So, Max Wang -
Master's Program Advisor
Ben Babadi, WEI HSU CHAO, Erissa Irani, Talbot Morris-Downing, HITHA REVALLA, Arvind Srivastav, Chengzhe XU -
Doctoral (Program)
Spiros Baltsavias, Kevin Boyle, Samyuktha Challa, Jerry Chang, Cheng Chen, Kevin Chen, Ahmad Ghalayini, Albert Gural, Soheil Hor, Siavash Kananian, Ahmed Sawaby, Mahmoud Sawaby, Arjun Seshadri, Miaad Seyed Aliroteh, Max Wang
All Publications
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MINI-SPECIAL ISSUE ON 2018 INTERNATIONAL WORKSHOP ON INTEGRATED NONLINEAR MICROWAVE AND MILLIMETRE-WAVE CIRCUITS
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
2019; 67 (7): 2521–22
View details for DOI 10.1109/TMTT.2019.2919357
View details for Web of Science ID 000473597700008
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Ultrasonic Wake-Up With Precharged Transducers
IEEE JOURNAL OF SOLID-STATE CIRCUITS
2019; 54 (5): 1475–86
View details for DOI 10.1109/JSSC.2019.2892617
View details for Web of Science ID 000466185400024
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Time-of-flight imaging based on resonant photoelastic modulation
APPLIED OPTICS
2019; 58 (9): 2235–47
View details for DOI 10.1364/AO.58.002235
View details for Web of Science ID 000461903600013
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Beamforming Microwave-Induced Thermoacoustic Imaging for Screening Applications
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
2019; 67 (1): 464–74
View details for DOI 10.1109/TMTT.2018.2880901
View details for Web of Science ID 000455450200043
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End-to-End Design of Efficient Ultrasonic Power Links for Scaling Towards Submillimeter Implantable Receivers
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
2018; 12 (5): 1100–1111
Abstract
We present an analytical framework for optimizing the efficiency of ultrasonic wireless power links for implantable devices scaled down to sub-mm dimensions. Key design insights and tradeoffs are considered for various parameters including the operating frequency, the transmission depth, the size of the transmitter, the impedance and the aperture efficiency of the miniaturized receiver, and the interface between the receiver and the power recovery chain on the implant. The performance of spherically focused transducers as ultrasonic transmitters is analyzed to study the limits and the tradeoffs. Two optimization methods are presented: "Focal Peak" sets the focus of transducers at target depths, and "Global Maximum" maximizes the efficiency globally with off-focus operation. The results are also compared to phased array implementations. To investigate the efficiency of implants, miniaturized receivers made from single crystalline piezoelectric material, PMN-PT, are used as they have resonances in the derived optimal carrier frequency range (∼1-2 MHz). A methodology to achieve an efficient interface to the power electronics is then provided using an optogenetic stimulator as an example platform. The analytical results are verified through both simulations and measurements. Finally, an example ultrasonic link using a spherical transmitter with a radius of 2 cm is demonstrated; link efficiencies of 1.93-0.23% are obtained at 6-10 cm depths with sub-mm receivers for the optogenetic application.
View details for DOI 10.1109/TBCAS.2018.2871470
View details for Web of Science ID 000448529300001
View details for PubMedID 30235147
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Long-term in vivo performance of novel ultrasound powered implantable devices.
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
2018; 2018: 2985–88
Abstract
Neuromodulation devices have been approved for the treatment of epilepsy and seizures, with many other applications currently under research investigation. These devices rely on implanted battery powered pulse generators, that require replacement over time. Miniaturized ultrasound powered implantable devices have the potential to eliminate the need for batteries in neuromodulation devices. While these devices have been assessed in vitro, long-term in vivo assessment is required to determine device safety and performance. In this study, we developed a multi-stage long-term test platform to assess the performance of miniaturized ultrasound powered implantable devices.
View details for DOI 10.1109/EMBC.2018.8512978
View details for PubMedID 30441025
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Thermal analysis of ultrasound-powered miniaturized implants: A tissue-phantom study.
The Journal of the Acoustical Society of America
2018; 143 (6): 3373
Abstract
Neurological implants that harvest ultrasound power have the potential to provide long-term stimulation without complications associated with battery power. An important safety question associated with long-term operation of the implant involves the heat generated by the interaction of the device with the ultrasound field. A study was performed in which the temperature rise generated by this interaction was measured. Informed by temperature data from thermocouples outside the ultrasound beam, a mathematical inverse method was used to determine the volume heat source generated by ultrasound absorption within the implant as well as the surface heat source generated within the viscous boundary layer on the surface of the implant. For the test implant used, it was determined that most of the heat was generated in the boundary layer, giving a maximum temperature rise 5 times that for absorption in an equivalent volume of soft tissue. This result illustrates that thermal safety guidelines based solely on ultrasound absorption of tissue alone are not sufficient. The method presented represents an alternative approach for quantifying ultrasound thermal effects in the presence of implants. The analysis shows a steady temperature rise of about 0.2°C for every 100 mW/cm2 for the presented test implant.
View details for PubMedID 29960486
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A mm-Sized Wireless Implantable Device for Electrical Stimulation of Peripheral Nerves
IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS
2018; 12 (2): 257–70
Abstract
A wireless electrical stimulation implant for peripheral nerves, achieving >10× improvement over state of the art in the depth/volume figure of merit, is presented. The fully integrated implant measures just 2 mm × 3 mm × 6.5 mm (39 mm3, 78 mg), and operates at a large depth of 10.5 cm in a tissue phantom. The implant is powered using ultrasound and includes a miniaturized piezoelectric receiver (piezo), an IC designed in 180 nm HV BCD process, an off-chip energy storage capacitor, and platinum stimulation electrodes. The package also includes an optional blue light-emitting diode for potential applications in optogenetic stimulation in the future. A system-level design strategy for complete operation of the implant during the charging transient of the storage capacitor, as well as a unique downlink command/data transfer protocol, is presented. The implant enables externally programmable current-controlled stimulation of peripheral nerves, with a wide range of stimulation parameters, both for electrical (22 to 5000 μA amplitude, ∼14 to 470 μs pulse-width, 0 to 60 Hz repetition rate) and optical (up to 23 mW/mm2 optical intensity) stimulation. Additionally, the implant achieves 15 V compliance voltage for chronic applications. Full integration of the implant components, end-to-end in vitro system characterizations, and results for the electrical stimulation of a sciatic nerve, demonstrate the feasibility and efficacy of the proposed stimulator for peripheral nerves.
View details for DOI 10.1109/TBCAS.2018.2799623
View details for Web of Science ID 000428547600001
View details for PubMedID 29578414
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A Miniaturized Single-Transducer Implantable Pressure Sensor With Time-Multiplexed Ultrasonic Data and Power Links
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2018: 1089–1101
View details for DOI 10.1109/JSSC.2017.2782086
View details for Web of Science ID 000428676100014
- A mm-sized wireless implantable device for electrical stimulation of peripheral nerves IEEE Trans. Biomedical Circuits and Systems 2018
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A Dual-Element VNA Electronic Calibration in CMOS
IEEE. 2018: 71–74
View details for Web of Science ID 000458440200021
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A Single-Element VNA Electronic Calibration in CMOS
IEEE. 2018: 1304–7
View details for Web of Science ID 000451173600344
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A Programmable RF Transmitter for Wideband Thermoacoustic Spectroscopic Imaging
IEEE. 2018: 1405–8
View details for Web of Science ID 000451173600371
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Array Location Uncertainty in Imaging Radar: SAR vs. MIMO-SAR
IEEE. 2018: 150–53
View details for Web of Science ID 000467992900038
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A 14.5mm(2) 8nW-59.7dBm-Sensitivity Ultrasonic Wake-Up Receiver for Power-, Area-, and Interference-Constrained Applications
IEEE. 2018: 454-+
View details for Web of Science ID 000459205600189
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A 14.5mm(2) 8nW-59.7dBm-Sensitivity Ultrasonic Wake-Up Receiver for Power-, Area-, and Interference-Constrained Applications
IEEE. 2018
View details for Web of Science ID 000432256300188
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Wireless Data Links for Next-Generation Networked Micro-Implantables
IEEE. 2018
View details for Web of Science ID 000434207400090
- Wireless Data Links for Next-Generation Networked Micro-Implantables Proc. 2018 IEEE Custom Integrated Circuits Conference 2018
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Microwave-Induced Thermoacoustic Imaging of Subcutaneous Vasculature With Near-Field RF Excitation
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
2018; 66 (1): 577–88
View details for DOI 10.1109/TMTT.2017.2714664
View details for Web of Science ID 000419544200052
- A miniaturized single-transducer implantable pressure sensor with time-multiplexed ultrasonic data and power links IEEE J. Solid-State Circuits 2018
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Ball Grid Array Module With Integrated Shaped Lens for 5G Backhaul/Fronthaul Communications in F-Band
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
2017; 65 (12): 6380–94
View details for DOI 10.1109/TAP.2017.2755439
View details for Web of Science ID 000417885000019
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Wireless Power Transfer to Millimeter-Sized Nodes Using Airborne Ultrasound
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
2017; 64 (10): 1526–41
Abstract
We propose the use of airborne ultrasound for wireless power transfer to mm-sized nodes, with intended application in the next generation of the Internet of Things (IoT). We show through simulation that ultrasonic power transfer can deliver 50 [Formula: see text] to a mm-sized node 0.88 m away from a ~ 50-kHz, 25-cm2 transmitter array, with the peak pressure remaining below recommended limits in air, and with load power increasing with transmitter area. We report wireless power recovery measurements with a precharged capacitive micromachined ultrasonic transducer, demonstrating a load power of 5 [Formula: see text] at a simulated distance of 1.05 m. We present aperture efficiency, dynamic range, and bias-free operation as key metrics for the comparison of transducers meant for wireless power recovery. We also argue that long-range wireless charging at the watt level is extremely challenging with existing technology and regulations. Finally, we compare our acoustic powering system with cutting edge electromagnetically powered nodes and show that ultrasound has many advantages over RF as a vehicle for power delivery. Our work sets the foundation for further research into ultrasonic wireless power transfer for the IoT.
View details for DOI 10.1109/TUFFC.2017.2737620
View details for Web of Science ID 000412634700010
View details for PubMedID 28796616
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Exploiting spatial degrees of freedom for high data rate ultrasound communication with implantable devices
APPLIED PHYSICS LETTERS
2017; 111 (13)
View details for DOI 10.1063/1.5004967
View details for Web of Science ID 000412074000042
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Remote sub-wavelength focusing of ultrasonically activated Lorentz current
APPLIED PHYSICS LETTERS
2017; 110 (16)
View details for DOI 10.1063/1.4981906
View details for Web of Science ID 000399984200068
- Scaling of Ultrasound-Powered Receivers for Sub-Millimeter Wireless Implants IEEE Biomedical Circuits and Systems Conference (BioCAS) 2017
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Communication with Crystal-Free Radios
IEEE. 2017
View details for Web of Science ID 000428054301151
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Closed-Loop Ultrasonic Power and Communication with Multiple Miniaturized Active Implantable Medical Devices
IEEE. 2017
View details for Web of Science ID 000416948401052
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A High-Precision 36 mm(3) Programmable Implantable Pressure Sensor with Fully Ultrasonic Power-up and Data Link
IEEE. 2017: C104–C105
View details for Web of Science ID 000428759000042
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Capsule Ultrasound Device: Characterization and Testing Results
IEEE. 2017
View details for Web of Science ID 000416948401038
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Sound Technologies, Sound Bodies
IEEE MICROWAVE MAGAZINE
2016; 17 (12): 39-54
View details for DOI 10.1109/MMM.2016.2608638
View details for Web of Science ID 000388892900008
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Design of Tunable Ultrasonic Receivers for Efficient Powering of Implantable Medical Devices With Reconfigurable Power Loads
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
2016; 63 (10): 1554-1562
Abstract
Miniaturized ultrasonic receivers are designed for efficient powering of implantable medical devices with reconfigurable power loads. Design parameters that affect the efficiency of these receivers under highly variable load conditions, including piezoelectric material, geometry, and operation frequency, are investigated. Measurements were performed to characterize electrical impedance and acoustic-to-electrical efficiency of ultrasonic receivers for off-resonance operation. Finally, we propose, analyze, and demonstrate adaptive matching and frequency tuning techniques using two different reconfigurable matching networks for typical implant loads from 10 [Formula: see text] to 1 mW. Both simulations and measurements show a significant increase in total implant efficiency (up to 50 percentage points) over this load power range when operating off-resonance with the proposed matching networks.
View details for DOI 10.1109/TUFFC.2016.2606655
View details for Web of Science ID 000385720000008
View details for PubMedID 27623580
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Loss and Dispersion Limitations in mm-Wave Dielectric Waveguides for High-Speed Links
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
2016; 6 (4): 637-640
View details for DOI 10.1109/TTHZ.2016.2574326
View details for Web of Science ID 000384913500016
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System-Level Analysis of Far-Field Radio Frequency Power Delivery for mm-Sized Sensor Nodes
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
2016; 63 (2): 300-311
View details for DOI 10.1109/TCSI.2015.2512720
View details for Web of Science ID 000372751000013
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Fully packaged millimetre-wave dielectric waveguide with multimodal excitation
ELECTRONICS LETTERS
2015; 51 (17): 1339-1340
View details for DOI 10.1049/el.2015.2306
View details for Web of Science ID 000359725300021
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A mm-Sized Implantable Medical Device (IMD) With Ultrasonic Power Transfer and a Hybrid Bi-Directional Data Link
IEEE JOURNAL OF SOLID-STATE CIRCUITS
2015; 50 (8): 1741-1753
View details for DOI 10.1109/JSSC.2015.2427336
View details for Web of Science ID 000358618500002
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A Power-Harvesting Pad-Less Millimeter-Sized Radio
IEEE JOURNAL OF SOLID-STATE CIRCUITS
2015; 50 (4): 962-977
View details for DOI 10.1109/JSSC.2014.2384034
View details for Web of Science ID 000352156000013
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Non-contact thermoacoustic detection of embedded targets using airborne-capacitive micromachined ultrasonic transducers
APPLIED PHYSICS LETTERS
2015; 106 (8)
View details for DOI 10.1063/1.4909508
View details for Web of Science ID 000350546600091
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Stepped-frequency continuous-wave microwave-induced thermoacoustic imaging
APPLIED PHYSICS LETTERS
2014; 104 (22)
View details for DOI 10.1063/1.4879841
View details for Web of Science ID 000337161700093
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Frequency-modulated magneto-acoustic detection and imaging
ELECTRONICS LETTERS
2014; 50 (11): 790-791
View details for DOI 10.1049/el.2014.0997
View details for Web of Science ID 000337911200006
- mm-Wave Silicon: Smarter, Faster, and Cheaper Communication and Imaging. Frequency References, Power Management for SoC, and Smart Wireless Interfaces Springer International Publishing. 2014: 281–295
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A power-harvesting pad-less mm-sized 24/60GHz passive radio with on-chip antennas
IEEE VLSI Circuits Symposium
2014
View details for DOI 10.1109/VLSIC.2014.6858380
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Segmentation and Artifact Removal in Microwave-Induced Thermoacoustic Imaging
36th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society (EMBC)
IEEE. 2014: 4747–4750
Abstract
Microwave-induced thermoacoustic (TA) imaging combines the soft-tissue dielectric contrast of microwave excitation with the resolution of ultrasound for the goal of a safe, high resolution, and possibly portable imaging technique. However, the hybrid nature of this method introduces new image-reconstruction challenges in enabling sufficient accuracy and segmentation. In this paper, we propose a segmentation technique based on the polarity characteristic of TA signals. A wavelet analysis based method is proposed to identify reflection artifacts as well. The time-frequency feature of the signal is used to assist differentiating artifacts. Ex vivo verification with experimental data is also provided.
View details for Web of Science ID 000350044704184
View details for PubMedID 25571053
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A 135GHz SiGe Transmitter With A Dielectric Rod Antenna-In-Package For High EIRP/Channel Arrays
36th Annual IEEE Custom Integrated Circuits Conference (CICC) - The Showcase for Integrated Circuit Design in the Heart of Silicon Valley
IEEE. 2014
View details for Web of Science ID 000349122300144
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A mm-Sized Implantable Device with Ultrasonic Energy Transfer and RF Data Uplink for High-Power Applications
36th Annual IEEE Custom Integrated Circuits Conference (CICC) - The Showcase for Integrated Circuit Design in the Heart of Silicon Valley
IEEE. 2014
View details for Web of Science ID 000349122300093
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A 94 GHz mm-Wave-to-Baseband Pulsed-Radar Transceiver with Applications in Imaging and Gesture Recognition
Symposium on VLSI Circuits held its 26th Meeting on State-of-the-Art Topics important to VLSI Circuit and System Designers, as well as Device and Process Technology Experts
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC. 2013: 1055–71
View details for DOI 10.1109/JSSC.2013.2239004
View details for Web of Science ID 000316810500017
- Analysis and Design of a Multi-mode Dielectric Waveguide Interconnect with Planar Excitation 2013
- Dielectric Waveguide with Planar Multi-Mode Excitation for High Data-Rate Chip-to-Chip Interconnects 2013
- A Three-Stage Cascaded Distributed Amplifier with GBW Exceeding 1.5THz IEEE Radio Frequency Integrated Circuits Symposium (RFIC) 2012: 211-214
- A 94GHz mm-wave to baseband pulsed-radar for imaging and gesture recognition. In VLSI Circuits (VLSIC) 2012: 56-57
- 60GHz Low-Loss Compact Phase Shifters Using A Lumped Element Hybrid CICC 2011
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Time-Domain Ultra-Wideband Synthetic Imager (TUSI) in Silicon
33rd Annual International Conference of the IEEE Engineering-in-Medicine-and-Biology-Society (EMBS)
IEEE. 2011: 505–511
Abstract
This paper introduces a silicon-based imaging array for remote measurements of complex permittivity of tissue. Using a coherent pulsed measurement approach, this time-frequency resolved technique recovers the three dimensional mapping of electrical properties of the subject in the microwave/millimeter-wave frequency spectrum. Some of the major challenges in the design of the system are described. Initial measurement results from the prototype high-resolution transmitter fabricated in a 0.13 μm SiGe process are described. The transmitter achieves pulse widths suitable for millimeter-level accuracy imaging.
View details for Web of Science ID 000298810000122
View details for PubMedID 22254359
- A 90GHz Pulsed-Transmitter with Near-Field/Far-Field Energy Cancellation using a Dual-Loop Antenna 2011
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A 90 GHz Hybrid Switching Pulsed-Transmitter for Medical Imaging
IEEE JOURNAL OF SOLID-STATE CIRCUITS
2010; 45 (12): 2667-2681
View details for DOI 10.1109/JSSC.2010.2077150
View details for Web of Science ID 000285052300016
- A 90GHz Carrier 30GHz Bandwidth Hybrid Switching Transmitter with Integrated Antenna ISSCC 2010 Digest of Teach. 2010: 420-421
- A 90nm CMOS Low-Power 60GHz Transceiver with Integrated Baseband Circuitry IEEE Journal of Solid State Circuits 2009; 44 (12): 3434-3447
- A 90nm CMOS Low-Power 60GH Transceiver with Integrated Baseband Circuitry ISSCC 2010 Digest of Tech. Papers 2009: 314-315
- Design of a CMOS Tapered Cascaded Multistage Distributed Amplifier IEEE Transactions on Microwave Theory and Techniques 2009; 57 (4): 938-947
- A Tapered Cascaded Multi-Stage Distributed Amplifier with 370GHz GBW in 90nm CMOS 2008
- A Broadband Distributed Amplifier with Internal Feedback Providing 660GHz GBW in 90nm CMOS ISSCC 2008 Digest of Tech. Papers 2008: 196-197
- A 60-GHz 90- nm CMOS Cascode Amplifier with Interstage Matching 2007
- Internal Unilaterization Technique for CMOS mm-Wave Amplifiers 2007
- The Optimizations of PRF Staggering in a MTI Radar 2005
- Rural Telecommunications in Iran: A Hybrid Solution 2005