Speakers Bureau

Ultra Low Noise, InP Field Effect Transistors Radio Astronomy Receivers: State -of-the - Art

Dr. Marian W. Pospieszalski

Nat. Radio Astr. Lab., National Radio Astronomy Observatory, 1180 Boxwood Estate Road, Charlottesville, VA 22903,

Tel: 1-434-296-0350

Over the last quarter century progress in the noise performance of FET and HFET amplifiers at cryogenic temperatures was quite dramatic. The achievable noise temperatures at particular frequencies were lowered by an order of magnitude and the useful frequency range of cryogenic HFET receivers...

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Noise and signal properties of heterostructure field effect transistors at cryogenic temperatures

Dr. Marian W. Pospieszalski

Nat. Radio Astr. Lab., National Radio Astronomy Observatory, 1180 Boxwood Estate Road, Charlottesville, VA 22903,

Tel: 1-434-296-0350

Design and examples of realizations of wideband, low-noise, cryogenically-coolable HFET amplifiers in the 3 to 120 GHz range

Examples of realization of receivers for interferometric arrays

Examples of realization of very broadband continuum radiometers

Thoughts on future...

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