MRF Technologies - About Us

MRF Technologies, LLC

Microwave and RF Technology Solutions

MRF Technologies was formed to address the need for consulting on research and development issues facing high-frequency circuit designs. As an independent consulting and design service company, we can bring our expertise and know-how into your organization at a low cost.

Our goals are not only to accomplish the analysis, modeling, or design tasks, but also to transfer what was learned and discovered to your company. Technology transfer is an important part of our service for the benefit of your company as well as complete satisfaction the service was carried through to the fullest degree.

The principals at MRF Technologies have been involved in research and development in the high-frequency analysis and design industry for over 20 years in many aspects of circuit analysis, modeling, design, parameter extraction, management and more.

Jason Gerber

Education:
M.S. Electrical Engineering, University of Massachusetts, Amherst, MA, 1989
B.S. Electrical Engineering, Drexel University, Philadelphia, PA, 1986

Experience:

Mr. Gerber joined Compact Software (acquired by Ansoft Corporation) in 1988, developing nonlinear harmonic-balance simulation tools and transistor parameter extraction tools. He developed measurement and extraction strategies for general purpose and power microwave devices and commercialized the Scout parameter extraction program. Mr. Gerber has also worked developing harmonic-balance circuit simulation methods, nonlinear device modeling, and led efforts for the commercialization of the tools.

Mr. Gerber became a Product Manager of Ansoft Designer, a CAD tool integrating design capture, circuit, system, and planar EM simulation, and design layout. He has worked extensively modeling, designing, and simulating microwave circuits including amplifiers, mixers, and oscillators. Since 2003 he has been with BAE Systems designing and consulting in many aspects of microwave and RF circuitry. Mr. Gerber has published over 20 technical papers in professional journals and conference proceedings.

Dr. Chao-Ren Chang

Education:
Ph.D., Electrical Engineering, North Carolina State University, N.C. 1990.
M.S., Electrical Engineering, North Carolina State University, N.C. 1980.

Experience:

Dr. Chang joined Compact Software (acquired by Ansoft Corporation) in 1990, researching and developing nonlinear analysis techniques using harmonic balance methods. He was responsible for core development of fast and robust nonlinear solvers, nonlinear noise analysis, oscillator and phase noise analysis, and leading a group of researchers in frequency and time-domain circuit simulation development.

Prior to joining Compact Software, he worked at the Chung-Shan Institute of Science and Technology, Taiwan, R.O.C. and has eight years experience designing airborne radar front-ends, frequency agile RF receivers, slot-array antennas, and altimeters.

Full resumes are available upon request.

Selected publications for Jason Gerber and Dr. Chao-Ren Chang:

"Simulating Multi-Finger Power HBTs", Microwave Journal pp. 96-103, Mar. 2002.

"A Systematic Scheme for Power Amplifier Design Using a Multi-Harmonic Load Pull Simulation Technique," IEEE MTT-S, pp. 161-164, 1998.

"HBT High Frequency Modeling and Integrated Parameter Extraction," IEEE Trans. on MTT, vol. 45, no. 12, pp. 2493-2502, Dec. 1997.

"Application of Harmonic-Balance Analysis to the Stability Analysis of Oscillators," 1997 IEEE MTT-S, pp. 1587-1590, 1997.

"Analysis and optimization of oscillators for low phase noise and low power consumption," RF Design, pp. 70-79, Mar.1995.

"Harmonic-Balance Analysis and Optimization of Oscillator Properties Including Phase Noise," 1994 Asia-Pacific Microwave Conf., pp. 867-870

"A Self-Heating HBT Model for Harmonic-Balance Simulators with Parameter Extraction," 1994 Asia-Pacific Microwave Conf., pp. 1029-1032

"Nonlinear Noise Analysis for Wireless Communication Systems," 1993 RF Expo West Digest, pp. 254-260.

"The Simulation of Temperature Effects in Small-Signal, Linear, and Large-Signal, Nonlinear Circuits," 1993 IEEE MTT-S Workshop on Thermal Aspects of Microwave Device and Circuit CAD.

"State-of-the-Art Nonlinear CAD for Microwave/RF Circuit Design," 1991 RF Expo East Digest, pp. 1-29.

"Computer-aided analysis of free-running microwave oscillators," IEEE Trans. Microwave Theory Tech., vol. MTT-39, pp. 1735-1745, Oct. 1991.

"Computer-aided analysis of nonlinear microwave circuits using frequency-domain nonlinear analysis techniques: the state of the art," (invited), International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering, vol. 1, pp. 181-200, Apr. 1991.

"Simulation and Modeling Techniques Applied to an Optimum 18.5 GHz DRO Design," 1991 RF Expo West, pp. 429-435.

"MESFET Model Extraction and Verification Techniques for Nonlinear Applications," 1990 Asia-Pacific Microwave Conference, pp. 321-324.

"Frequency-domain nonlinear microwave circuit simulation using the arithmetic operator method," IEEE Trans. Microwave Theory Tech., vol. MTT-38, pp. 1139-1143, Aug. 1990.

"Harmonic balance and frequency-domain simulation of nonlinear microwave circuits using the block Newton method," IEEE Trans. Microwave Theory Tech., vol. MTT-38, pp. 431-434, Apr. 1990.

"Frequency-domain spectral balance using the arithmetic operator method," IEEE Trans. Microwave Theory Tech., vol. MTT-37, pp. 1681-1688, Nov. 1989.

"Control of aliasing in the harmonic balance simulation of nonlinear microwave circuits," 1989 IEEE MTT-S Digest, pp. 355-358, June 1989.

"Simulation of nonlinear RF and microwave circuits," 1988 RF Expo East Digest, pp. 333-339, Oct. 1988.

Please note that author names have been removed as many of these publications were co-authored with people not affiliated with MRF Technologies. Further details of any of these papers are available upon request.