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SUMMARY:Picosecond Radiating Integrated Circuits and Single-Chip EPR Spect
 rometers
DTSTART:20140630T170000
DTSTAMP:20260408T060003Z
UID:574f4d0f0a59dc72ce32bd9ad07d5f74b629326a418de9e0053dd016
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Aydin Babakhani\nHistorically\, research in the fields o
 f circuits and electromagnetics has been conducted within two separate com
 munities. This separation made sense in the past as the speed of transisto
 rs was not high enough to justify the integration of radiating elements. D
 ue to the low operating frequency of transistors\, the chip size was alway
 s much smaller than the wavelength\, hence it was not possible to make eff
 icient on-chip radiators. Today’s silicon process technology allows us t
 o implement silicon chips that are comparable to or even larger than the o
 perating wavelength. This transition creates a new opportunity for researc
 h on implementing Large-Scale Radiating Integrated (LSRI) circuits in the 
 mm-wave and THz regimes.\nIn this talk\, the world’s first picosecond im
 pulse radiating integrated circuit and the first single-chip Electron Para
 magnetic Resonance (EPR) spectrometer will be presented.\nThe picosecond i
 mpulse radiator is based on an oscillator-less direct digital-to-impulse t
 opology that radiates impulses with EIRP of 13dBm and a record pulse-width
  of 8psec. It is shown that the starting time of the radiated impulses can
  be locked to edge of the input trigger with high timing accuracy. It is d
 emonstrated that multiple widely spaced chips can generate coherent impuls
 es in space with timing jitter of better than 300fsec. It is also shown th
 at the frequency stability of the radiated impulses is better than 10Hz at
  220GHz. The chip is fabricated in a 130nm SiGe BiCMOS process and occupie
 s an area of 0.55mm by 0.85mm.\nThe single-chip Electron Paramagnetic Reso
 nance (EPR) spectrometer is implemented in a 0.13μm SiGe BiCMOS process. 
 The chip can operate in both continuous wave (CW) and pulse modes. The fre
 quency is tunable from 770MHz to 970MHz\, corresponding to Zeeman magnetic
  fields from 28mT to 35mT for a free electron. The CW-EPR absorption line 
 of a DPPH powder and various magnetic nanoparticles are acquired.\nBio: Pr
 ofessor Aydin Babakhani does research on mm-wave\, THz\, and photonics int
 egrated circuits and their applications in wireless communications\, radar
 \, imaging\, and spectroscopy. He joined the Faculty of Rice University\, 
 Houston\, in 2011\, where he is an Assistant Professor of Electrical and C
 omputer Engineering and Director of Rice Integrated Systems and Circuits L
 aboratory. He received his B.S. degree in Electrical Engineering from Shar
 if University of Technology\, and his M.S. and Ph.D. degrees in Electrical
  Engineering from Caltech. He was a postdoctoral scholar at Caltech and a 
 research scientist at IBM T. J. Watson Research Center prior to joining Ri
 ce University.\nDr. Babakhani was a co-recipient of IEEE International Mic
 rowave Symposium Best Paper Award in 2014. He received a major THz researc
 h award from Keck Foundation in 2014\, an innovation award from Northrop G
 rumman in 2014\, and a prestigious DARPA Young Faculty Award (YFA) in 2012
 . He is a recipient of AFOSR DURIP award in 2014 and ONR DURIP award in 20
 12. He received the Caltech Electrical Engineering Department's Charles Wi
 lts Best Ph.D. Thesis Prize for his work on Near-Field Direct Antenna Modu
 lation (NFDAM). From 2006 to 2008 he was the Vice Chair of the IEEE Microw
 ave Theory and Techniques Society Metro LA/SFV Joint Sections MTT-S Chapte
 r 17.1. He was the recipient of the Microwave Graduate Fellowship in 2007\
 , the Grand Prize in the Stanford-Berkeley-Caltech Innovators Challenge in
  2006\, Analog Devices Inc. Outstanding Student Designer Award in 2005\, a
 s well as Caltech Special Institute Fellowship and Atwood Fellowship in 20
 03. He was also the Gold Medal winner of the National Physics Competition 
 in 1998\, and the Gold Medal winner of the 30th International Physics Olym
 piad in 1999\, in Padova\, Italy.
LOCATION:MC B1 283  http://plan.epfl.ch/?lang=fr&room=ME+B3+31
STATUS:CONFIRMED
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