Stephen E. Sussman-Fort received the BEE degree from the City College of the City University of New York in 1969, the MSE degree from Princeton University in 1971, and the PhD degree from the University of California, Los Angeles, in 1978. From 1969 to 1973 he was employed by Bell Laboratories, Holmdel, NJ, where he was engaged in the design of RC, thin-film, active filters. During his doctoral studies at UCLA from 1974 to 1978, he had summer and part-time jobs at the Burroughs Corporation, TRW, the Aerospace Corporation, and Hughes Aircraft, where he was involved in the design of current-mode logic circuits, frequency synthesizers, and microwave GaAs FET circuits. He was on the faculty of North Carolina State A & T University during 1978-1979, and was with Rensselaer Polytechnic Institute during 1979-1980. During the summer of 1979, he was with the IBM Corporation, Research Triangle Park, NC, where he developed computer models of radio anechoic chambers. In 1980 he joined the Electrical Engineering Department of the State University of New York at Stony Brook, where he is now associated professor and director of the Microwave-CAD Research Laboratoiy. He is the author of MATCHNET (Artech House, 19911, a program for the automated design of microwave matching networks, and of CIAO, a program for the analysis and optimization of microwave circuits. During the summer of 1992 he was a visiting professor at the Institute de Recherche en Communications Optiques and Microondes, University of Limoges, France, where he performed research on microwave active filters. Dr. Sussman-Fort's research interests encompass the areas of microwave circuits, computer-aided design, and network theory.
An NIC-based negative capacitance circuit for microwave active filters (invited article)
Article first published online: 9 MAR 2007
Copyright © 1995 Wiley Periodicals, Inc., A Wiley Company
International Journal of Microwave and Millimeter-Wave Computer-Aided Engineering
Volume 5, Issue 4, pages 271–277, July 1995
How to Cite
Sussman-Fort, S. E. and Billonnet, L. (1995), An NIC-based negative capacitance circuit for microwave active filters (invited article). Int. J. Microw. Mill.-Wave Comput.-Aided Eng., 5: 271–277. doi: 10.1002/mmce.4570050406
- Issue published online: 9 MAR 2007
- Article first published online: 9 MAR 2007
- Manuscript Revised: 6 FEB 1995
- Manuscript Received: 22 NOV 1994
This article presents a method for synthesizing a negative capacitance in MMIC technology, and extends our earlier work (S. E. Sussman-Fort, Int. J. MIMICAE, Vol. 4, No. 2, April 1994, pp. 130-139) involving the realization of MMIC negative resistance. As before, we employ a classical negative impedance converter (NIC) that has been terminated in an RLC one port specially designed to compensate for the parasitics of the active and passive elements. We argue that, in most cases, this one port will be physically realizable, and we provide numerical results for the synthesis which supports this idea. The procedure is demonstrated in computer simulation for a four-transistor MMIC network which achieves a virtually pure capacitance of -5 pF over 1.5-2.5 GHz. Such NIC-based negative capacitance (and resistance) has potential application in the design of microwave gyrators and active filters. © 1995 John Wiley & Sons, Inc.