Robert Harrison, Ph.D. (London)

Professor

Email: rgh@doe.carleton.ca
Voice: +1 613 520-5776
FAX: +1 613 520-5708
Office: 4160 ME

Research Interests

1. Theory of interactions between nonlinear phenomena and electromagnetic signals up to optical frequencies, involving conventional and quantum-mechanical semiconductors; applications to frequency division and multiplication, mixing, radiometry, and millimetre wave WLAN networks. Nonlinear modelling of heterostructure, resonant-tunneling, and quantum-barrier devices. Algebraic and numerical approaches to analyzing the nonlinear interactions.

2. Electro-mechanical biomedical devices.  The current project concerns a novel design for an external knee orthosis that will enable patients suffering from neurolocomotion or muscle-weakness problems to walk with a nearly-normal gait.  This work is being done in cooperation with The Rehabilation Centre, part of the Royal Ottawa Health Care group.  For information see the website of the Institute for Rehabilitation Research and Development: http://www.rohcg.on.ca/irrd/
 

Recent Journal Publications

"A Fully Distributed Heterostructure-Barrier Varactor Nonlinear Transmission-Line Frequency Multiplier and Pulse Sharpener"
IEEE Transactions on Microwave Theory and Techniques, Vol. 46, No. 12, December 1998, pp. 2295-2301 (with M. Li and K. Krishnamurthi).
 
"Millimeter-Wave Frequency Tripling Using Stacked Heterostructure-Barrier Varactors on InP"
IEE Proceedings - Microwaves, Antennas and Propagation, Vol. 143, No. 4, August 1996, pp. 272-276 (with K. Krishnamurthi).
 
"Use of the 2-Dimensional TLM Method in the Electromagnetic Simulation of Thin Semiconductor Samples"
International Journal of Numerical Modelling, Vol. 8, No. 2, March-April 1995 (with S.F. Dindo and M.M. Ney).
 
"GaAs Single-Barrier Varactors for Millimeter-Wave Triplers: Guidelines for Enhanced Performance"
IEEE Transactions on Microwave Theory and Techniques, December 1994, pp. 2512-2516 (with K. Krishnamurthi and S.M. Nilsen).
 
"Non-Squarelaw Behavior of Diode Detectors Analyzed by the Ritz-Galerkin Method"
IEEE Transactions on Microwave Theory and Techniques, Vol. 42, No. 5, May 1994, pp. 840-846 (with X. Le Polozec).
 
"Comments on Millimeter- and Submillimeter-Wave Multipliers Using Quantum-Barrier-Varactor (QBV) Diodes"
IEEE Electron Device Letters, Vol. 13, No. 2, February 1992, pp. 132-133 (with K. Krishnamurthi).
 
"Theoretical and Experimental Investigations of the Distortion in Radiation Spectra Caused by Pulse Pileup",
Nuclear Geophysics, Vol. 5, No.1/2, 1991, pp. 141-186 (with Q. Bristow).
 
"Characterization of the Frequency Stability of Frequency-Hopping Sources"
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 38, No. 5, September 1991, pp. 429-435 (with G.A. Kalivas).

Recent Conference Proceedings

"A Fully-Distributed Heterostructure-Barrier-Varactor Nonlinear-Transmission-Line Frequency Tripler"
IEEE Internatonal Microwave Symposium Digest, Baltimore, MD, June 1998, Digest pp. 1639-1642 (with M. Li).
 
"The Performance of Hybrid MMIC Building Blocks for 38-GHz WLAN Transceiver Applications"
7th International Conference on Wireless Communications, Calgary, Alberta, July 1995  (with E. Boch and D.D. Falconer).
 
"A Ka-Band Planar Tripler Based on a Stacked Symmetric InP Heterostructure-Barrier Varactor"
IEEE Internatonal Microwave Symposium Digest, Orlando, Florida, May 1995, Digest pp. 549-552 (with K. Krishnamurthi and E. Boch).
 
"A Heterostructure Tripler Varactor Device for 40 GHz PCN Radio Source"
Proc. Third Annual Wireless Symposium, Santa Clara, CA, February 1995, Digest pp. 468-470 (with K. Krishnamurthi).
 
"An Investigation into Practical Implementation Trade-Offs for Millimetre-Wave Indoor WLAN Transceivers"
6th International Conference on Wireless Communications, Calgary, Alberta, July 1994, Digest pp. 442-449 (with E. Boch and D.D. Falconer).
 
"A Prototype Millimetre-Wave WLAN MMIC Transceiver for Wide-Band Indoor LOS Applications"
6th International Conference on Wireless Communications, Calgary, Alberta, July 1994, Digest pp. 69-75 (with E. Boch).
 
"Stacked Heterojunction Barrier Varactors on InP for Millimeter Wave Triplers"
24th European Microwave Conference Proceedings, Cannes, France, September 1994, pp. 758-763 (with K. Krishnamurthi, C. Rogers, J. Ovey, S.M. Nilsen and M. Missous).
 
"Transmission-Line Matrix (TLM) formulation of The Non-Stationary Electromagnetic Fields in a Thin GaAs Sample"
IEEE MTT-S International Microwave Symposium Digest, San Diego, CA, May 1994, pp. 325-328 (with S.F. Dindo and M.M. Ney).
 
"Chair-Barrier Varactors on GaAs for Frequency Triplers"
IEEE MTT-S International Microwave Symposium Digest, San Diego, CA, May 1994, pp. 313-316 (with K. Krishnamurthi, H.C. Liu, M. Buchanan, Z.R. Wasilewski, and J.R. Thompson).
 
"Analysis of Symmetric-Varactor Frequency Triplers"
IEEE MTT-S International Microwave Symposium Digest, Atlanta, GA, June 1993, pp. 649-652 (with K. Krishnamurthi).
 
"High Q Quantum-Barrier-Varactor (QBV) Diodes for Millimeter Wave Multipliers"
Proceedings 17th International Conference on Infrared and Millimeter Waves, Pasadena, CA, December 1992, pp. 74-75 (with K. Krishnamurthi, H.G. Liu, A.J. SpringThorpe, and M. Buchanan).

"Full Nonlinear Analysis of Detector Circuits Using Ritz-Galerkin Theory"
IEEE MTT-S International Microwave Symposium Digest, Albuquerque, NM, June 1992.

"Theory of Regenerative Frequency DividersUsing Double-Balanced Mixers"
IEEE MTT-S International Microwave Symposium Digest, Long Beach, CA, June 1989, pp. 459-462.

 "Taper and Forward-Feed in GaAS MMIC Distributed Amplifiers"
IEEE MTT-S International Microwave Symposium Digest, Long Beach, CA, June 1989, pp. 1039-1042 (with M. Ross and R.K. Surridge.

Book Chapters

"Frequency Multipliers and Dividers"
Chapter 13 of Microwave Solid-State Circuit Design (P. Bhartia ans I.J. Bahl, Eds.) , John Wiley, New York 1988, (pp. 676-753).

Section VII of Microwave Transistors (E.D. Graham and C.W. Gwynn, Eds.), Artech House, Dedham, MA, 1975, (pp. 369-378).

"Large Signal Microwave Frequency Transistor Modelling"
Chapter 3 of Semiconductor Device Modelling for Computer-Aided Design (G.J. Herskowitz and R.B. Schilling, Eds.), McGraw-Hill, New York 1972 (pp. 78-133).

Patents

"Microstrip-Slotline Frequency Halver", U.S. Patent No. 4,636,757, issued January 13, 1987 (with G.A. Kalivas).

"Microstrip-Slotline Frequency Halver", Canadian Patent No. 1,225,126, issued August 4, 1987 (with G.A. Kalivas).

"Wveguide Frequency Divider", U.S. Patent No. 4,228,411, issued October 14, 1980.

"Broadband Frequency Divider Using Microwave Varactors", U.S. Patent No. 4,152,680, issued May 1, 1979.

"Broadband Frequency Divider Using Microwave Varactors", Canadian Patent No. 1,041,614, issued October 31, 1978.