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Radio Physics and Radio Astronomy

ISSN Print: 2152-274X
ISSN Online: 2152-2758

Archives: Volume 1, 2010 to Volume 3, 2012

Radio Physics and Radio Astronomy

DOI: 10.1615/RadioPhysicsRadioAstronomy.v3.i2.100
pages 179-185

UNSATURATED MODE AS ALTERNATIVE METHOD TO PROVIDE STABILITY OF LOW-NOISE AMPLIFIERS ON HIGH-ELECTRON-MOBILITY TRANSISTORS

A. M. Korolev
Institute of Radio Astronomy, National Academy of Sciences of Ukraine, 4, Chervonopraporna St., Kharkiv, 61002, Ukraine
Valery M. Shulga
Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, Kharkov, Ukraine

ABSTRACT

A new method to provide the stability of low-noise HEMT-based amplifiers is proposed. The method consists in goal-oriented selection of a DC mode in the unsaturated (ohmic) segment of current-voltage curve. Stability -primarily that out-of-band − rises without noise characteristic degradation. In support of the offered method efficiency, the results of examination of amplifiers designed on different transistors are brought.

KEY WORDS: HEMT, stability, low-noise