Lawrence Drabeck

Ph.D. SOLID STATE PHYSICS (1991 - UCLA)M.S. Physics (1987 - UCLA)B.S. Physics (1986 - UCLA)

Published papers

"Weakly Coupled Grain Model of High Frequency Losses in High Tc Superconducting Thin Films", T. L. Hylton, A. Kapitulnik, M. R. Beasley, J. Carini, L. Drabeck, and G. Grüner, Appl. Phys. Lett. 53, 1343 (1988)."Power Law Temperature Dependence of the Electrodynamic Properties in Oriented YBa3Cu3O7 and Y2Ba4Cu8O16 Films", L. Drabeck, J. P. Carini, G. Grüner, T. Hylton, K. Char, and M. R. Beasley, Phys. Rev B39, 785 (1989)."The Surface Impedance of High Tc Superconductors", J. Carini, L. Drabeck, and G. Grüner, Modern Physics Letters B, Vol. 3, 5 (1989)."Surface Impedance Studies of the High-Tc Oxide Superconductors", T. L. Hylton, M. R. Beasley, A. Kapitulnik, J. P. Carini, L. Drabeck, and G. Grüner, IEEE Transactions on Magnetics, Vol. 25, 810 (1989)."Microwave Surface Resistance in Tl-based Superconducting Thin Films", L. D. Chang, M. J. Moskowitz, R. B. Hammond, M. M. Eddy, W. L. Olson, D. D. Casavant, E. J. Smith, M. Robinson, L. Drabeck, and G. Grüner, Appl. Phys. Lett. 55, 1357 (1989)."Preparation of Superconducting Tl-Sr-Ba-Cu Thin Films by Chemical Deposition", W. L.  Olson, M. Eddy, T. James, R. Hammond, G. Grüner, and L. Drabeck, Appl. Phys. Lett 55, 188 (1989)."Frequency Dependence of the Surface Resistance in High-Temperature Superconductors", D. W. Cooke, E. R. Gray, H. H. S. Javadi, R. J. Houlton, N. Klien, G. Muller, S. Orbach, H. Piel, L. Drabeck, G. Grüner, J. Y. Josefowicz, D. B. Rensch, and F. Krajenbrink, Solid State Communications 73, 297 (1989)."Surface Resistance of YBa2Cu3O7 Films Deposited on LaGaO3 Substrates", D. W. Cooke, E. R. Gray, R. J. Houlton, H. H. S. Javadi, M. A. Maez, B. L. Bennet, B. Rusnak, E. A. Meyer, P. N. Arendt, J. G. Beery, R. D. Brown, F. H. Garzon, I. D. Raistrick, A. D. Rollet, B. Bolmaro, N. E. Elliott, L. Drabeck, and G. Grüner, Physica C 162-164, 1537 (1989)."Millimeter-Wave Surface Impedance of YBa2Cu3O7 Thin Films", L. Drabeck, G. Grüner, J. J. Chang, A. Inam, X. D. Wu, L. Nazer, T. Venkatesan, and D. J. Scalipino, Phys. Rev. B40, 7350 (1989)."Microwave Properties of Highly Oriented YBa2Cu3O7 Thin Films", A. Inam, X. D. Wu, L. Nazer, M. S. Hedge, C. T. Rogers, T. Venkatesan, R. W. Simon, K. Daly, H. Padamsee, J. Kirchgessner, D. Moffat, D. Rubin, Q. S. Shu, D. Kalokitis, A. Fathy, V. Pendrick, R. Brown, B. Brycki, E. Belohoubek, L. Drabeck, G. Grüner, R. Hammond, F. Gamble, B. M. Lairson, and J. C. Bravman, Appl. Phys. Lett. 56, 1178 (1990)."Ohmic and Radiation Losses in Superconducting Films", L. Drabeck, K. Holczer, G. Grüner, and D. J. Scalapino, J. Appl. Phys. 68, 892 (1990)."Surface Resistance of Laser Deposited YBa2Cu3O7 Films", L. Drabeck, K. Holczer, G. Grüner, J. J. Chang, D. J. Scalapino, A. Inam, X. D. Wu, L. Nazar, and T. Venkatesan,  Phys. Rev. B42, 10020 (1990)."An Experimental Investigation of YBa2Cu3O7 Films at Millimeter Wave Frequencies", L. Drabeck, K. Holczer, G. Grüner, J. J. Chang, D. J. Scalapino, and T. Venkatesan,  J. of Superconductivity 3, 317 (1990)."Surface Resistance Studies of Laser Deposited Tl2Ba2CaCu2O8 Films", M. M. Eddy, J. Z. Sun, R. D. Hammond, L. Drabeck, I. B. Ferreira, K. Holczer, and G. Grüner, J. Appl. Phys. 70, 496 (1991).“Microstructure and Microwave Properties of YBCO Thin Films Grown on MGO and SrTiO3 by CVD” K Young, M Robinson, G Negrete, T Yamashita, T Hirai, H Suzuki, H Kurosawa, L Drabeck, G Gruner, J. of Matterials Research, Vol. 6, Issue 11, pp 2259-2263, 1991. "A Correlation Between Orthorhombic Strain and Tc in In-situ Coevaporated YBa2Cu3O7- Thin Films", S. J. Berkowitz, E. De Obaldia, K. F. Ludwig, Jr., P. M. Mankiewich, W. J. Skocpol, R. H. Ono, J. A. Beall, L. R. Vale, D. A. Rudman, M. L. O'Malley, L. M. Drabeck, and P. A. Polakos (submitted to Appl. Phys. Lett. 4/93)."Fabrication of Low Rs, Large Area, YBa2Cu3Ox Thin Films by In-situ Coevaporation", E. De Obaldia, P. M. Mankiewich, S. J. Berkowitz, K. F. Ludwig, W. J. Skocpol, M. O'Malley, L. M. Drabeck, and P. A. Polakos (in preparation). “High Temeprature Superconductor Subharmonically Pumped Digital Phase Modulator Demodulator” L Drabeck, P Polakos,  M Omalley, M Schneider, R Trambarulo, P Mankiewich, IEEE Trans. Elec. Devices, Vol. 40, Issue 11, pp 2140-2141, 1993.“Increased Transition Temperature in In-Situ Coevaporated YBa2Cu307-d Thin Films by Low Temperature Postannealing” s Berkowitz, E DeObaldia, K Ludwig, W Shocpol, P Mankiewich, R Ono, J Beall, L Vale, D Rudman, M Omalley, L Drabeck, P Polakos, App. Phys. Lett. Vol. 65, Issue 12, pp 1587-1589, 1994."Network Optimization Trials of a Vendor-Independent Methodology Using Ocelot", L. M. Drabeck, M. J. Flanagan, J. Srinivasan, W. M. MacDonald, G. Hampel, and A. Diaz, Bell Labs Technical Journal, vol. 9, No. 4, 2004.“The New Paradigm for WirelessNetwork Optimzation: A Synergy of Automated Processes and Human Intervention” G Hampel, D. Abush-Magder, A Diaz, L. Drabeck, M Flanagan, J Graybeal, J Hobby, M MacDonald, P Polakos, J Srinivasan, H Trickey, L Zhang, G Rittenhouse, IEEE Comm Magazine Suppliment S, pp S14-S21, Mar. 2005.“Dynamic Optimization in Future Cellular Networks”, Simon Borst, Arumugam Buvaneswari, Lawrence Drabeck, Micheal Flanagan, John Graybeal, Georg Hampel, Mark Haner, William McDonald, Paul Polakos, Gee Rittenhouse, Iraj Saniee, Alan Weiss, Bell Labs Technical Journal, vol. 10, No 2, Summer 2005.“Wireless Network Analysis Using Per Call Measurement Data” Micheal Flanagan, Lawrence Drabeck, Larry Cohen, Alvaro Diaz, Jayanthi Srinivasan, Bell Labs Technical Journal, vol. 11, No 4, Winter 2007.“Propagation over Parabolic Terrain: Asymptotics and Comparison to Data”, Dmitry Chizhik, Larry Drabeck, W. Michael MacDonald,  IEEE Trans. on Ant and Propag, Vol. 58, No. 6, pp 2012-2020, June, 2010.“Self-Optimization of LTE Networks Utilizing Celnet Xplorer”, Arumugam Buvaneswari, Lawrence Drabeck, Nachi Nithi, Mark Haner, Paul Polakos and Chitra Sawkar,  Bell Labs Technical Journal, vol. 15, No 3, Summer 2010.

Conference papers/posters

"Surface Impedance of High Tc Superconductors" L. Drabeck, J. Carini, G. Grüner, T. L. Hylton, A. Kapitulnik, and M. R. Beasley, IEEE Microwave Symposium, Long Beach, California (1989)"In-Situ Deposited Superconducting Laser-Ablated Thin Films of YBa2Cu3O7 and Bi0.8Pb0.2Sr0.8CaCu1.6Ox " T. Frey, St. Siegmann, H. J. Guntherodt, L. Drabeck, and G. Grüner,  Science and Technology of Thin Film Superconductors, Denver, Colorado (1990)"A Comparative X-Ray Study of YBa2Cu3O7 Growth Methods on LaAlO3", S. J. Berkowitz, E. DeObaldia, K. F Ludwig, P. M. Mankiewich, J. Skocpol, R. H. Ono, J. A. Beall, L. R. Vale, D. Rudman, M. L. O'Malley, L. M. Drabeck, P. A. Polakos, Materials Research Society Fall Meeting, Boston, Massachusetts (1992)"Fabrication of Very Low Rs, Smooth Large Area YBa2Cu3O7 Thin Films by In-Situ Co-Evaporation" E. DeObaldia, P. M. Mankiewich, S. J. Berkowitz, K. F. Ludwig, W. J. Skocpol, M. L. O'Malley, L. M. Drabeck, and P. A. Polakos, Materials Research Society Fall Meeting, Boston, Massachusetts (1992)"High Temperature Superconductor Subharmonically-Pumped Digital Phase Modulator/Demodulator" L. M. Drabeck, P. Polakos, M. O'Malley, M. V. Schneider, R. Trambraulo, and P. Mankiewich, IEEE Device Research Conference, Santa Barbara, CA  (1993)"High Temperature Superconductor GBit/s Subharmonically-Pumped Modulator/Demodulator" L. M. Drabeck, P. Polakos, M. O'Malley, M. V. Schneider, R. Trambraulo, and P. Mankiewich, 23rd European Microwave Conference, Madrid, Spain  (1993)“Wireless Services, Systems and Network Confiuration”, L. Drabeck, IEEE MTT Wireless Conference, Baltimore (1998)“Network Optimization and Capacity Increases in Cellular Systems”, Larry Drabeck, Georg Hampel, Paul Polakos, Ming-Ju Tsai, Bill Hammerle, Bert Johnson Gary Hojell, Li Chung Chang, J. Ned Hines, Craig Maitz, Ajay Rajkumar, Anthony Triolo, Norm Ziesse, IEEE MTT-S International Topical Symposium on Technologies for Wireless Applications (INTER COMM 99), Vancouver, BC (1999)“Pathloss and Scattering with Antenna Downtilt” L. Drabeck, Gary Hojell and Max Solondz IEEE AP2000 Millennium Conference on Antennas and Propagation, Davos, Swizterland (2000)“Capacity Estimation for Growth Planning of Cellular networks in the Presence of temporal and spatial Traffic Fluctuations” G Hampel, M Flanagan, L Drabeck, J Srinivasan, P Polakos, G Rittenhouse, VTC 2005 – Spring.“Propagation over a valley: asymptotic results”,  Dmitry Chizhik, Larry Drabeck, W. Michael  MacDonald,  Proc of Eur. Conf on Ant and Propag, (EUCAP), March, 2009”Asymptotic Analysis of Propagation over Cluttered Parabolic Ridges”, Dmitry Chizhik, Larry Drabeck, W. Michael MacDonald, IEEE COMCAS, September, 2009“Cacheability Analysis of HTTP traffic in an Operational LTE Network”,   Buvaneswari A. Ramanan,  Lawrence M.Drabeck, Mark Haner, Karun Nithi, Thierry E.Klein, Chitra Sawkar, Wireless Telecomunications Symposium, April, 2013

Detector and Modulator Circuits for Passive Microwave Links, L. Drabeck, M. Schneider, C. Tran, US Patent #5598169

Notch-Enhancement in Band-Reject Filters, L. Drabeck, M. Schneider, C. Tran, US Patent #5721521

System and Method for Controlling Antenna Downtilt/Uptilt in a Wireless Communication Network, L. Drabeck, P. Gammel, G. Hampel, P. Polakos, A. Rajkumar, T. Triolo, N. Ziesse, US Patent #6549529

Methods and Apparatus for Design, Adjustment or Operation of Wireless Networks Using Multistage Optimization, C. Chekuri, L. Drabeck, K. Hampel, P. Polakos, Y. Zhang, US Patent #6925066

Methods and Apparatus for Design, Adjustment or Operation of Wireless Networks Using Pre-Frequency Assignment Optimization, C. Chekuri, L. Drabeck, Y. Zhang, US Patent #7142523

Radio Front End Design using Monte Carlo Models for Intermodulation Distortion Calculation, Lawrence Drabeck, Paul Polakos, US Patenet #7873323

Virtualization of  Control Plane Functions of a Wireless Core Packet Network, Tian Bu, Lawrence Drabeck, Karl Hampel, Buvaneswari Ramanan, Moritz Steiner, Filed 6/6/2013

LTE User Presence Detection for Small Cell Placement, Lawrence Drabeck, Buvaneswari Ramanan, Theodore Sizer II, Filed 3/13/2013