Cryogenic Schottky-mixer receiver front-end for 40-50 GHz

Details Cryogenic Schottky-mixer receiver front-end for 40-50 GHz Cryogenic Schottky-mixer receiver front-end for 40-50 GHz

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...9011959l&link_type=abstract

Unknown

Physics

Optics

Beam Switching, Cryogenic Equipment, Mixing Circuits, Radio Telescopes, Electron Optics, Field Effect Transistors, Radio Astronomy

Scientific paper

A cryogenic Schottky-mixer front-end was constructed at the Radio Laboratory for radioastronomical observations with the Metsahoivi 13.7 m telescope. The front-end consists of a corrugated feed-horn, ring-filter, Schottky-mixer and FET amplifier at 1.4 GHz, all cooled down to 20 K by a closed cycle helium refrigerator. The beam from the telescope is fed to the feed-horn through a quasi-optical system consisting of an ellipsoid mirror, a flat mirror/chopper and a meniscus lens. The system allows a beam switching of 3 beam-widths and also focusing of the beam of the horn back to a cold reference load within the dewar. The receiver noise temperature (DSB) was measured to the below 200 K from 40 to 52 GHz and the lowest noise temperature to be 122 K at GHz.

Affiliated with

Also associated with

No associations

Rating

Cryogenic Schottky-mixer receiver front-end for 40-50 GHz 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 Cryogenic Schottky-mixer receiver front-end for 40-50 GHz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryogenic Schottky-mixer receiver front-end for 40-50 GHz will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1529740