Ultra Wide Band Synthetic Aperture Radar Imaging: Radar Movement

This thesis is part of the ”Ultra Wideband Synthetic Aperture Radar Imaging” project of the bachelor Electrical Engineering graduation program in the fourth quarter of the teaching year 2016-2017. Synthetic aperture radar (SAR) is used to make images of the environment of a car. These images are, in combination with GPS, needed to give an...

Enhancement of the Spatial Resolution for the Temperature Sensing System of the 7 Tesla Magnetic Resonance Imaging Scanner

The MRI scanner with an ultrahigh magnetic field of 7T not only increases the image resolution but it also increases the Specific Absorption Rate (SAR) of the patient. In other words, the body temperature of the patient increases due to the absorption of heat produced by the 7T MRI scanner. This is dangerous for the health of the patient. In...

Analysis and Design of a 2.5GS/s 6-bit SAR ADC with a 3-bit/cycle Resolving Scheme

The thesis analyzes the design challenges that arise when developing high-speed ADCs and shows, through an extensive architecture study, that the SAR topology can be used with a sampling rate of 2.5GS/s if asynchronous processing and a multi-bit per cycle approach are adopted. The transistor-level implementation and simulation of a 6-bit SAR ADC...

Towards Real-time SAR

A Capacitance-Based Reference Scheme for a 14b-Linear, 100 MS/s SAR-Assisted Pipeline ADC

Voltage reference buffers have always been the most power-hungry blocks in switched-capacitor SAR ADCs. High frequency dynamic loading of the buffer by the capacitive DAC causes glitches on the reference voltage, and the buffer has to be fast enough to recover such transients to 1/2 LSB precision in every bit cycle. Such stringent requirements...

Integration of 3D tracking systems for Interaction in Spatial Augmented Reality

In this thesis, a projector-based Spatial Augmented Reality (SAR) system designed and developed to be applied to support physical and virtual 3D Rapid Prototyping in the field of Industrial Design Engineering is presented. The main contribution is a 3D scanner to get a virtual model of a physical model and tools to support the design of features...

A Low Power 10-bit SAR ADC in a 45nm CMOS process

In this work a low power SAR ADC with 8.9 ENOB for wireless communication systems is presented. A capacitive charge redistribution DAC with a unit capacitor of 0.5fF is used. The implemented charge-sharing technique, allows the use of 2^(N-1) + 1 unit capacitors, instead of the conventional 2^N , thus decreasing the DAC area and the DAC...

Assessing the MR compatibility of dental retainer wires at 7 tesla

The radio frequent (RF) safety of dental retainer wires during Magnetic Resonance Imaging at 7 tesla has been investigated using electromagnetic simulations and thermal measurements on a phantom model. In the Netherlands up to 40% of the younger adults have such a dental retainer wire, which at the moment is listed as a contraindication for 7 T...

Space-Based FMCW SAR Systems

Monitoring critical structures such as oil pipe lines or dikes is essential for performing in-time and high-quality maintenance. Such structures cover a large area or are in abandoned places. Consequently, performing physical inspections by dedicated personnel is either impossible or very expensive. Alternatively such structures can be inspected...