A new 3 mm band receiver for the Onsala 20 m antenna
Artikel i vetenskaplig tidskrift, 2015

A new receiver for the Onsala 20 m antenna with the possibility of being equipped with 3 mm and 4 mm bands has been built and the 3 mm channel has been commissioned during the Spring 2014. For single-dish operation, the receiver uses an innovative on-source/off-source optical switch. In combination with additional optical components and within the same optical layout, the switch provides two calibration loads (for the 3 mm and 4 mm channels), sideband rejection measurement, and tuning possibilities. The optical layout of the receiver employs all cold (4 K) offset elliptical mirrors for both channels, whereas the on-off switch employs flat mirrors only. The 3 mm channel employs a sideband separation (2SB) dual polarization receiver with orthomode transducer (OMT), 4-8 GHz intermediate frequency (IF), x? 2pol x? upper and lower sidebands (USB? +? LSB). The cryostat has four optical windows made of high density polyethylene (HDPE) with anti-reflection corrugations, two for the signal and two for each frequency band cold load. The cryostat uses a two-stage cryocooler produced by Sumitomo HI? RDK? 408D2 with anti-vibration suspension of the cold-head to minimize impact of the vibrations on the receiver stability. The local oscillator (LO) system is based on a Gunn oscillator with aphase lock loop (PLL) and four mechanical tuners for broadband operation, providing independently tunable LO power for each polarization. This paper provides a technical description of the receiver and its technology and could be useful for instrumentation engineers and observers using the Onsala 20 m telescope.

Instrumentation: detectors

Telescopes

Författare

Victor Belitsky

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Igor Lapkin

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Mathias Fredrixon

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Erik Sundin

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Leif Helldner

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Lars Pettersson

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Sven-Erik Ferm

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Miroslav Pantaleev

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Bhushan Billade

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Per Bergman

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Henrik Olofsson

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Mikael Lerner

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Magnus Strandberg

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Mark Whale

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Alexey Pavolotskiy

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

Jonas Flygare

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Hans Olofsson

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

John Conway

Chalmers, Rymd- och geovetenskap, Onsala rymdobservatorium

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 580 A29

Infrastruktur

Onsala rymdobservatorium

Ämneskategorier

Fusion, plasma och rymdfysik

DOI

10.1051/0004-6361/201425573