Faculty of Engineering
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Fully automated gridding reconstruction for non-Cartesian x-space magnetic particle imaging
(IOP, 2019)Magnetic particle imaging (MPI) is a fast emerging biomedical imaging modality that exploits the nonlinear response of superparamagnetic iron oxide (SPIO) nanoparticles to image their spatial distribution. Previously, ... -
A high gain and high efficiency 15 W X-Band GaN power amplifier MMIC
(IEEE, 2019)An X-band microstrip power amplifier MMIC based on our 0.25 μm AlGaN/GaN on SiC process technology is presented in this work. Fabrication steps, HEMT structure and typical device performance are demonstrated. Design procedure ... -
A 6-18 GHz GaN power amplifier MMIC with high gain and high output power density
(IEEE, 2019)A three-stage reactively-matched 6-18 GHz power amplifier MMIC design is presented. The design effort is focused on obtaining a low-loss output matching network for a high output power density. Active unit cells consist ... -
GaN-on-SiC LNA for UHF and L-Band
(IEEE, 2019)In this paper, we report a broadband GaN HEMT LNA from 100 MHz to 2 GHz, using common source with inductive degeneration and RC feedback topology. Flat gain response of ±1.5 dB variation for 9 V drain voltage with 108 mA ... -
An S-Band high gain AlGaN/GaN HEMT MMIC low noise amplifier
(IEEE, 2019)In this paper design, fabrication and measurement of a GaN HEMT based Monolithic Microwave Integrated Circuit (MMIC) Low Noise Amplifier (LNA) is presented. 12-Term equivalent circuit modeling is exacuted. Inductive source ... -
Realistic channel temperature simulation of AlGaN/GaN high electron mobility transistors
(IEEE, 2019)In this work, the realistic channel temperature of AlGaN/GaN High Electron Mobility Transistors (HEMTs) is investigated by using 2D electrothermal and Finite Element Method (FEM) thermal simulations. By using a special ... -
X-band high power GaN SPDT MMIC RF switches
(IEEE, 2019)This paper describes the design results and measured performance of three different high power, low loss and high isolation GaN high electron mobility transistor (HEMT) based single-pole double-throw (SPDT) RF switches. ... -
Output feedback stabilization by reduced order finite time observers using a trajectory based approach
(IEEE, 2019)We use finite time reduced order continuous-discrete observers to solve an output feedback stabilization problem for a class of nonlinear time-varying systems whose outputs contain uncertainty. Unlike earlier works, our ... -
Stochastic driver modeling and validation with traffic data
(IEEE, 2019)This paper describes a stochastic modeling approach for predicting driver responses in highway traffic. Different from existing approaches in the literature, the proposed modeling framework allows simultaneous decision ... -
Distributed output feedback control of decomposable lpv systems with delay: Application to multi-agent nonholonomic systems
(IEEE, 2019)This paper presents distributed output feedback control of a class of distributed linear parameter varying systems with a parameter-dependent time-varying delay. A delaydependent bounded-real lemma approach, based on ... -
Controller design for delay margin improvement
(IEEE, 2019)Two important design objectives in feedback control are steady-state error minimization and delay margin maximization. In general these two objectives work against each other. This paper starts with an initial controller ... -
Preface
(Idea Group Publishing, 1999) -
Learning bayesian classifiers for scene classification with a visual grammar
(IEEE, 2005-03)A challenging problem in image content extraction and classification is building a system that automatically learns high-level semantic interpretations of images. We describe a Bayesian framework for a visual grammar that ... -
FEM Based design and simulation tool for MRI birdcage coils Including eigenfrequency analysis
(2012)Radio Frequency (RF) birdcage coils are widely used in Magnetic Resonance Imaging (MRI). Before the actual construction of the coil, not only calculating the capacitance value, which is necessary for the coil to resonate ... -
HMM Based behavior recognition of laboratory animals
(ICPR, 2012)In pharmacological experiments, a popular method to discover the effects of psychotherapeutic drugs is to monitor behaviors of laboratory mice subjected to drugs by cameras. Automating behavior analysis of laboratory ... -
Link recommendation in P2P social networks
(WOSS, 2012)Social networks have been mostly based on a centralized infrastructure where the owner hosts all the data and services. This model of “fat server & thin clients” results in many systems and practical problems such as ... -
Localizing the excitation to reduce scan time using nonlinear gradient fields
(ISMRM, 2012)elatively low SAR, but they cannot excite local regions and therefore causes long scan times. Although small volumes can be excited using multi-dimensional excitation pulses, such pulses are long and/or have relatively ...
