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Gain and Stability Models for HBT Grid Amplifiers

Liu, Cheh-Ming and Sovero, Emilio A. and DeLisio, Michael P. and Moussessian, Alina and Rosenberg, James J. and Rutledge, David B. (1995) Gain and Stability Models for HBT Grid Amplifiers. In: 1995 Digest IEEE Antennas and Propagation Society International Symposium. IEEE , Piscataway, NJ, pp. 1292-1295. ISBN 0-7803-2719-5.

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A 16-element heterojunction bipolar transistor (HBT) grid amplifier has been fabricated with a peak gain of 11 dB at 9.9 GHz with a 3-dB bandwidth of 350 MHz. We report a gain analysis model for the grid and give a comparison of the measurement and theory. The measured patterns show the evidence of a common-mode oscillation. A stability model for the common-mode oscillation is developed. Based on the stability model, a lumped capacitor gives suitable phase shift of the circular function, thus stabilizing the grid. A second 18-element grid was fabricated, using this theory, with improved stability.

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Additional Information:© 1995 IEEE. Date of Current Version: 06 August 2002. The authors would like to appreciate the support of Air Force Material Command/Rome Laboratory and Army Research Office.
Funding AgencyGrant Number
Air Force Material Command/Rome LaboratoryUNSPECIFIED
Army Research Office (ARO)UNSPECIFIED
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INSPEC Accession Number5188807
Record Number:CaltechAUTHORS:20120217-102843662
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Official Citation:Cheh-Ming Liu; Sovero, E.A.; De Lisio, M.P.; Moussessian, A.; Rosenberg, J.J.; Rutledge, D.B.; , "Gain and stability models for HBT grid amplifiers," Antennas and Propagation Society International Symposium, 1995. AP-S. Digest , vol.2, no., pp.1292-1295 vol.2, 18-23 Jun 1995 doi: 10.1109/APS.1995.530256 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29358
Deposited By: Ruth Sustaita
Deposited On:17 Feb 2012 19:04
Last Modified:09 Nov 2021 17:06

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