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dc.contributor.advisor Babakhani, Aydin
dc.creatorAssefzadeh, Mahdi
dc.date.accessioned 2016-01-06T20:24:43Z
dc.date.available 2016-01-06T20:24:43Z
dc.date.created 2014-12
dc.date.issued 2014-11-24
dc.date.submitted December 2014
dc.identifier.citation Assefzadeh, Mahdi. "Picosecond Digital-to-Impulse (D2i) Radiators in Silicon." (2014) Master’s Thesis, Rice University. https://hdl.handle.net/1911/87707.
dc.identifier.urihttps://hdl.handle.net/1911/87707
dc.description.abstract Current techniques for terahertz (THz) time-domain spectroscopy (TDS) are based on femtosecond lasers and photoconductive antennas (PCAs). The PCA is the emitter and the detector of THz pulses and includes a THz antenna which is fabricated on a high mobility semiconductor substrate. THz-TDS techniques are used for 3D imaging and non-destructive evaluation of materials in pharmaceutical, medical and security applications. There are a number of limitations with current THz-TDS systems. Femtosecond lasers are expensive and bulky with high power consumption. They also require optical alignments. The delay line and object scanning are performed mechanically. The repetition rate and the radiated power are also limited. A single-chip impulse radiator in silicon can overcome these limitations. It is a high yield and low cost solution and can provide repetition rates of up to 10 GHz. A low power digital trigger is needed instead of an optical pump, without requiring lasers or optical alignments. In this work, direct digital-to-impulse (D2i) radiators are implemented in silicon technologies that can radiate sub-10psec impulses with on-chip antennas. System architecture, broadband phase-linear antenna design, circuit techniques, simulations and measurement results are discussed in this thesis. Also a full-system on-chip 4 by 4 array of D2i radiators are fabricated in silicon that provide beam-steering and spatial coherent combining of impulses.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectBiCMOS digital integrated circuits
Ge-Si alloys
bow-tie antennas
broadband antennas
frequency stability
slot antennas
timing jitter
BiCMOS process
EIRP digital-to-impulse radiator
SiGe
coherent impulses
direct digital-to-impulse transmitter
frequency 10 Hz
frequency 220 GHz
frequency stability
on-chip slot bow-tie antenna
radiated impulse
size 130 nm
timing jitter
Antenna measurements
BiCMOS integrated circuits
Current measurement
Indexes
Three-dimensional displays
Time-frequency analysis
BiCMOS
Coherent Spatial Combining
Direct Digital-to-Impulse Radiator
Picosecond Impulse Radiation
SiGe
Slot Bow-Tie Antenna
dc.title Picosecond Digital-to-Impulse (D2i) Radiators in Silicon
dc.contributor.committeeMember Kono, Junichiro
dc.contributor.committeeMember Mittleman, Daniel M
dc.date.updated 2016-01-06T20:24:43Z
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Electrical and Computer Engineering
thesis.degree.discipline Engineering
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Science


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