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A Step-Frequency Radar Imaging System for Microwave Nondestructive Evaluation

W. H. Weedon, W. C. Chew P. E. Mayes
2000 Electromagnetic Waves  
To calibrate the antenna array, the scattered field is also computed using a 2-D finite-difference time-domain (FDTD) forward solver.  ...  Figure 6 . 6 Arrangement of transmitters (T), receivers (R) and object grid for new switched antenna array.  ... 
doi:10.2528/pier99062501 fatcat:ozooe7raizdqdcaz3ak47y2atq

2020 Index IEEE Journal of Solid-State Circuits Vol. 55

2020 IEEE Journal of Solid-State Circuits  
IC for Pulsed TOF Solid-State 3-D Imaging; JSSC July 2020 1960-1970, see Qi, L., 2889-2901 Jang, S., see Kim, D., JSSC Jan. 2020 167-177 Jansson, J., see Jahromi, S., JSSC July 2020 1960-1970  ...  133-144 Iwai, T., see Fan, Y., JSSC Feb. 2020 439-451 J Jafarlou, S., see Nazari, P., JSSC Feb. 2020 282-297 Jahromi, S., Jansson, J., Keranen, P., and Kostamovaara, J., A 32 × 128 SPAD-257 TDC Receiver  ...  ., +, JSSC Dec. 2020 3387-3399 Antenna Preprocessing and Element-Pattern Shaping for Multi-Band mmWave Arrays: Multi-Port Receivers and Antennas.  ... 
doi:10.1109/jssc.2021.3054535 fatcat:rfm7shuowvakfgzumgtqzlod5i

2021 Index IEEE Journal of Solid-State Circuits Vol. 56

2021 IEEE Journal of Solid-State Circuits  
The Author Index contains the primary entry for each item, listed under the first author's name.  ...  -that appeared in this periodical during 2021, and items from previous years that were commented upon or corrected in 2021.  ...  ., +, JSSC June 2021 1784-1794 A Fully Dynamic Low-Power Wideband Time-Interleaved Noise-Shaping SAR ADC.  ... 
doi:10.1109/jssc.2021.3137574 fatcat:nfo3y7i5kncsng36fvi5g5hdre

RFIC 2020 Program

2020 2020 IEEE Radio Frequency Integrated Circuits Symposium (RFIC)  
, Korea Abstract: A fully integrated passive true-time-delay (TTD) phase shifter is presented for a wideband phased array antenna using 28-nm CMOS technology.  ...  To mitigate in-band noise degradation in the ΔΣ BB-DPLL, a third-order ΔΣ modulator with a 1b output, a 4b hybrid DTC using a 3b delay line and a 1b phaseinterpolated frequency divider, and a ΔΣ BB-DPLL  ...  RTu1C-2 A 1.3V Wideband RF-PWM Cartesian Transmitter Employing Analog Outphasing and a Switched-Capacitor Class-D Output Stage Heechai Kang, Venkata S.  ... 
doi:10.1109/rfic49505.2020.9218389 fatcat:fqkpw3oau5gzpoi3gscgb7kwhi

Microwave Imaging for Early Breast Cancer Detection [chapter]

Yoshihiko Kuwahara
2017 New Perspectives in Breast Imaging  
We overview the research trend on microwave imaging for early breast cancer detection.  ...  The technologies have two categories: ultra-wide band (UWB) radar that reconstructs the scattering power distribution in the breast and inverse scattering problem that reconstructs the dielectric properties  ...  Delay and sum Microwave imaging via space time In microwave imaging via space time (MIST) beamforming for wideband monostatic radar [16] , the beamformer weights that adjust the array gain at a set  ... 
doi:10.5772/intechopen.69562 fatcat:g4ix2vprk5gn7bbg5ey4y7y4ia

2020 Index IEEE Transactions on Circuits and Systems II: Express Briefs Vol. 67

2020 IEEE Transactions on Circuits and Systems - II - Express Briefs  
., A Compact Substrate Integrated Waveguide Cavity-Backed Self-Triplexing Antenna; TCSII Nov. 2020 2362-2366 Islam, S., see 1464-1468 Ismail, A., and Sandell, M., A Novel Dynamic Detection for Flash  ...  Jacobsson, S., see Castaneda, O., TCSII May 2020 891-895 Jafari, E., and Binazadeh, T., Robust Output Regulation in Discrete-Time Singular Systems With Actuator Saturation and Uncertainties; 340-344  ...  ., +, TCSII April 2020 770-774 Dipole antenna arrays Wideband Planar Phased Array Antenna Based on Artificial Magnetic Con- ductor Surface.  ... 
doi:10.1109/tcsii.2020.3047305 fatcat:ifjzekeyczfrbp5b7wrzandm7e

2020 Index IEEE Transactions on Circuits and Systems I: Regular Papers Vol. 67

2020 IEEE Transactions on Circuits and Systems Part 1: Regular Papers  
Shao, J., +, TCSI Nov. 2020 3790-3803 An Inverted Ring Oscillator Noise-Shaping Time-to-Digital Converter With In-Band Noise Reduction and Coherent Noise Cancellation.  ...  Tapen, T., +, TCSI Jan. 2020 271-283 An Inverted Ring Oscillator Noise-Shaping Time-to-Digital Converter With In-Band Noise Reduction and Coherent Noise Cancellation.  ...  An N-Path Filter Design Methodology With Harmonic Rejection, Power Reduction, Foldback Elimination, and Spectrum Shaping.  ... 
doi:10.1109/tcsi.2021.3055003 fatcat:kbmst5td2bbvtl7vpbj3knnkri

Recent Advances in Neural Recording Microsystems

Benoit Gosselin
2011 Sensors  
These emerging tools have revealed a tremendous potential for the advancement of knowledge in brain research and for the development of useful clinical applications.  ...  The accelerating pace of research in neuroscience has created a considerable demand for neural interfacing microsystems capable of monitoring the activity of large groups of neurons.  ...  A continuous-time current-input second-order ΔΣM is presented in [24] .  ... 
doi:10.3390/s110504572 pmid:22163863 pmcid:PMC3231370 fatcat:vxz7aqtrpvgnhpv6p36uwp5b3m

2021 Index IEEE Transactions on Circuits and Systems II: Express Briefs Vol. 68

2021 IEEE Transactions on Circuits and Systems - II - Express Briefs  
The Author Index contains the primary entry for each item, listed under the first author's name.  ...  -that appeared in this periodical during 2021, and items from previous years that were commented upon or corrected in 2021.  ...  -Step Inverter-Based Continuous-Time Bandpass ΔΣ ADC in 28 nm Using Asynchronous SAR Quantizer. Ghaedrahmati, H., +, TCSII Sept. 2021 3113-3117 Recent Advances and Trends in Noise Shaping SAR ADCs.  ... 
doi:10.1109/tcsii.2022.3144928 fatcat:bm53w7gva5bthholfhhiq4yg3a

Probabilistic Spectrum Sensing based on Feature Detection for 6G Cognitive Radio: A Survey

Antoni Ivanov, Krasimir Tonchev, Vladimir Poulkov, Agata Manolova
2021 IEEE Access  
In spite of this, the provision of accurate and fast spectrum characterization in time, frequency and space has proven to be a non-trivial task.  ...  any application in every location on the ground, underwater, in the air, or in space.  ...  Additionally, utilizing an array of multiple receiving antennas in the SU, the MFD's performance can be improved due to the MA gain which shows that the SNR increases with a factor of 10 lg(N RX ) even  ... 
doi:10.1109/access.2021.3106235 fatcat:b4ojx3l54vcyncjaxu5zio4w6a

Optimal Time-Reversed Wideband Signals for Distributed Sensing [article]

Jerry Kim, Margaret Cheney, Eric Mokole
2015 arXiv   pre-print
We address the problem of finding the space-time transmit waveform that provides the best target detection performance in the sense of maximizing the energy scattered back into the receivers.  ...  In particular, for the case of idealized point-like scatterers in free space, we examine the frequency dependence of the eigenvalues of the TR operator, and we show that their behavior depends on constructive  ...  Shannon Blunt from the University of Kansas for his inputs and relevant references.  ... 
arXiv:1510.03777v1 fatcat:elrniv7dnjfw7czshrarcu2mnq

A comparison of two EIT systems suitable for imaging impedance changes in epilepsy

L Fabrizi, A McEwan, T Oh, E J Woo, D S Holder
2009 Physiological Measurement  
time for the same signal-to-noise ratio.  ...  The carbon-hydrogel electrode was superior to the other two in terms of amounts of boundary shape distortion, artifact and noise.  ...  Acknowledgments This work is supported in part by CenSSIS, the Center for Subsurface Sensing and Imaging Systems, under the Engineering Research Centers Program of the National Science Foundation (Award  ... 
doi:10.1088/0967-3334/30/6/s07 pmid:19491447 fatcat:nzeetw52ofaslcwhd2kxylvlpu

Performance Capabilities of Long-Range UWB-IR TDOA Localization Systems

Richard J. Barton, Divya Rao
2007 EURASIP Journal on Advances in Signal Processing  
on time-difference-of-arrival (TDOA) measurements.  ...  A novel weighted total-least-squares algorithm is introduced that compensates somewhat for errors in sensor positions and reduces the bias in location estimation compared with a widely used weighted least-squares  ...  Hence, for tracking targets in the far field (e.g., at ranges exceeding 100-200 meters for a small sensor array), the signal-to-noise ratio (SNR) for a single received UWB-IR pulse will generally be quite  ... 
doi:10.1155/2008/236791 fatcat:5wanwrubzvcb3le4lqz4yy4oju

A design methodology for 2D sparse NDE arrays using an efficient implementation of refracted-ray TFM

Jerzy Dziewierz, Timothy Lardner, Anthony Gachagan
2013 2013 IEEE International Ultrasonics Symposium (IUS)  
Recent advances in the field of tissue engineering include the engineering of skin, cartilage, and bladder, all of which are relatively thin tissues that can rely on diffusion for the delivery of oxygen  ...  These changes in collagen microstructure were produced using both ultrasound standing wave fields and traveling wave fields.  ...  The authors acknowledge the ANR and DGA for their support under the project Metactif, grant ANR-11-ASTR-015.  ... 
doi:10.1109/ultsym.2013.0035 fatcat:th5znfh7y5bklfdbmhb4u6iq2i

Delta-Sigma Modulator for Wideband and Multi-Band Radio Systems [article]

Sharif Abdur Rahman, University Of Calgary, University Of Calgary, Fadhel M. Ghannouchi
In this thesis, the utilization of delta-sigma modulators for wideband and multi-band applications in both the receiver and transmitter is addressed.  ...  The quantization noise is shaped in this architecture enabling concurrent transmission of two signals with low in-band noise interference.  ...  A digital logic circuit which will govern the signals combining without losing the bi-level signal for driving the SMPA could be developed as a solution to mitigate the number of SMPAs employed.  ... 
doi:10.11575/prism/25547 fatcat:epa2rkbznzdlhezgtks4aiyf2q
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