Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979phdt........60h&link_type=abstract
Paris XI, Universite, Docteur-Ingenieur Thesis, 1979. 99 p. In French.
Astronomy and Astrophysics
Astronomy
Copper, Low Temperature, Microwave Attenuation, Millimeter Waves, Skin Resistance, Transmission Loss, Waveguides, Cavities, Cooling, Cryogenics, Joule-Thomson Effect, Radio Astronomy
Scientific paper
A theoretical and experimental investigation is made towards realizing low-loss millimeter waveguides and cavities at 35 and 90 GHz, considering their utilization in a weak-noise receiver for radio astronomy. Attention is given to waveguide attenuation, especially to losses by the Joule effect in the walls. The resistance of the copper surface is calculated, taking into account the anomalous skin effect using results of Dingle theory. Single-crystal copper cavities were studied experimentally at 35 and 90 GHz. Calculations of the surface resistance of the copper as a function of temperature shows that the conduction is governed by the classical skin effect at elevated temperatures, but that at low temperatures, the resistance tends toward a limiting value due to the anomalous skin effect.
No associations
LandOfFree
Reduction of millimeter-wave losses in waveguides and cavities of very high purity copper by cooling to very low temperature does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Reduction of millimeter-wave losses in waveguides and cavities of very high purity copper by cooling to very low temperature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reduction of millimeter-wave losses in waveguides and cavities of very high purity copper by cooling to very low temperature will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-830876