The 17-27 GHz dual horn receiver on the NASA 70 m Canberra Antenna

T. B.H. Kuiper, M. Franco, S. Smith, G. Baines, L. J. Greenhill, S. Horiuchi, T. Olin, D. C. Price, D. Shaff, L. P. Teitelbaum, S. Weinreb, L. White, I. Zaw

Research output: Contribution to journalArticle

Abstract

A dual beam, dual polarization, low noise receiver has been installed at a Cassegrain focus of the NASA 70m antenna near Canberra, Australia. It operates in five pairs of 1GHz bands from 17 to 27GHz simultaneously. The receiver temperature measured at the feed is 21-22K at 22GHz and, during dry winter night-time conditions, zenith system temperatures as low as 35K have been observed in the 21-22GHz band. The native polarization is linear but can be converted to circular prior to down-conversion. The downconverters have complex mixers, followed by quadrature hybrids which can be bypassed or used to convert the quadrature phase channels into an upper and lower sideband, each 1000MHz wide. For spectroscopy, four ROACH1 signal processors each currently providing 32K channel spectra across four 1000MHz bands, for 0.4km/s velocity resolution at 22GHz. Using both beam- and position-switching, the receiver achieved a noise level of 5mK r.m.s. in an hour of integration and 31kHz resolution. The NASA 70m antennas have a 45 arcsec beamwidth at 22GHz and an aperture efficiency of 35.5% giving a sensitivity of 0.49K/Jy.

Original languageEnglish (US)
JournalJournal of Astronomical Instrumentation
DOIs
StateAccepted/In press - Jan 1 2019

Fingerprint

NASA
antennas
receivers
Polarization
Antennas
quadratures
Spectroscopy
zenith
linear polarization
sidebands
night
Temperature
low noise
winter
central processing units
apertures
temperature
sensitivity
polarization
spectroscopy

Keywords

  • CDSCC
  • K-band
  • NASA 70 m
  • radio astronomy
  • spectral lines

ASJC Scopus subject areas

  • Instrumentation
  • Astronomy and Astrophysics

Cite this

Kuiper, T. B. H., Franco, M., Smith, S., Baines, G., Greenhill, L. J., Horiuchi, S., ... Zaw, I. (Accepted/In press). The 17-27 GHz dual horn receiver on the NASA 70 m Canberra Antenna. Journal of Astronomical Instrumentation. https://doi.org/10.1142/S2251171719500144

The 17-27 GHz dual horn receiver on the NASA 70 m Canberra Antenna. / Kuiper, T. B.H.; Franco, M.; Smith, S.; Baines, G.; Greenhill, L. J.; Horiuchi, S.; Olin, T.; Price, D. C.; Shaff, D.; Teitelbaum, L. P.; Weinreb, S.; White, L.; Zaw, I.

In: Journal of Astronomical Instrumentation, 01.01.2019.

Research output: Contribution to journalArticle

Kuiper, TBH, Franco, M, Smith, S, Baines, G, Greenhill, LJ, Horiuchi, S, Olin, T, Price, DC, Shaff, D, Teitelbaum, LP, Weinreb, S, White, L & Zaw, I 2019, 'The 17-27 GHz dual horn receiver on the NASA 70 m Canberra Antenna', Journal of Astronomical Instrumentation. https://doi.org/10.1142/S2251171719500144
Kuiper, T. B.H. ; Franco, M. ; Smith, S. ; Baines, G. ; Greenhill, L. J. ; Horiuchi, S. ; Olin, T. ; Price, D. C. ; Shaff, D. ; Teitelbaum, L. P. ; Weinreb, S. ; White, L. ; Zaw, I. / The 17-27 GHz dual horn receiver on the NASA 70 m Canberra Antenna. In: Journal of Astronomical Instrumentation. 2019.
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