Publication: IEICE TRANSACTIONS on Electronics Publication Date: 1999/11/25 Vol. E82-CNo. 11pp. 1968-1976 Type of Manuscript: Special Section PAPER (Special Issue on High-Frequency/High-Speed Devices for Information and Communication Systems in the 21st Century) Category: Low Power-Consumption RF ICs Keyword: parameter extraction, HEMT characterization, equivalent-circuit, cold HEMT,