Accession Number:

ADP011753

Title:

Performance of the Phonon-Cooled Hot-Electron Bolometric Mixer Between 0.7 THz and 5.2 THz

Descriptive Note:

Corporate Author:

GERMAN AEROSPACE CENTER BERLIN (GERMANY) INST OF SPACE SENSOR TECHNOLOGY ANDPLANETARY EXPLORATION

Personal Author(s):

• Huebers, Heinz
• Semenov, Alexei
• Schubert, Josef
• Gol'tsman, Greogry
• Voronov, Boris

Report Date:

2000-09-29

Pagination or Media Count:

3.0

Abstract:

We report on the phonon cooled NbN hot electron bolometer as mixer in the terahertz frequency range. Its hybrid antenna consists of a hyperhemispheric silicon lens and a logarithmic-spiral feed antenna. Noise temperatures have been measured between 0.7 THz and 5.2 THz. A quarter wavelength layer of Parylene works as antireflection coating for the silicon lens and reduces the noise temperature by about 30. It was found that the antenna pattern at 2.5 THz is determined by the feed antenna and not by the diameter of the lens.

Descriptors:

• *COOLING
• *PHONONS
• *MIXERS(ELECTRONICS)
• *NIOBIUM COMPOUNDS
• SYMPOSIA
• POLYMERS
• ELECTRON ENERGY
• FAR INFRARED RADIATION
• FREQUENCY BANDS
• SILICON
• HYBRID SYSTEMS
• NOISE
• ANTIREFLECTION COATINGS
• TELESCOPES
• ANTENNA FEEDS
• BOLOMETERS

Subject Categories:

• Electrical and Electronic Equipment
• Optics
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE