Broadband, low-noise, cryogenically-coolable amplifiers in 1 to 40 GHz range

A design technique for very broadband, low-noise amplifiers is described. It is based on a wideband noise model of a MODFET. The computer-aided design and realization of L-, K-, and K¿-band and wideband 8-18-GHz cryogenically coolable amplifiers with optimal noise performance are described. The uniqueness of the results presented rests in the demonstration that a single frequency measurement of noise parameters provides sufficient information for the design of a number of wideband amplifiers in the 1-40-GHz range.