ISSTT Proceedings

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Phase and Amplitude Antenna Measurements on an SIS Mixer Fitted with a Double Slot Antenna for ALMA Band 9

Authors:
M. Carter, A. Baryshev, R. Hesper, S.J. Wijnholds, W. Jellema, T. Zijlstra
Abstract:
Phase and amplitude antenna measurements are required to give a complete and comprehensive antenna beam pattern of receiver systems. Radio astronomical receivers in the past years have been becoming more complex and/or increasing in frequency. There are a number of multichannel receivers on telescopes now that are either multi-frequency, or multi beam, with or without polarization diversity. These receivers, with the advent of projects like FIRST or ALMA, now go into the terahertz frequency bands. The reason for phase and amplitude measurements over simple amplitude measurements is so that the entire antenna system can be properly measured in the laboratory environment TRAM with its 2 radio astronomical sights at Pico Veleta and The Plateau du Bure have had for many years a phase and amplitude antenna test facility, which has worked up to frequencies of 350 GHz. This system has been upgraded to make measurements to the top of the ALMA frequency bands, of I THz for band 10 In this paper we show the schematic layout of the new system. Then we will proceed to show its properties at frequencies up to 700 GHz. This will be followed by the measurements on crossed slot antenna fitted with an SIS junction in the ALMA band 9 frequency range 600-720 GHz.
Categories:
Circuits, Optics
Year:
2002
Session:
10
Full-text:
Download a PDF of this paper.
Page Number(s):
515-524