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F. Mattiocco, M.Carter
Institut de Radio Astronomie Millimétrique,
38406 St. Martin d'Hères, France
Abstract:
Millimeter receivers made for the Radio Astronomy use devices and
materials whose transmission, and reflection properties have to be
known over a 40% bandwidth. We have made a millimeter extension to
an HP8510C vector analyzer, which at present allows magnitude and
phase measurement between 80 and 360 GHz with a sensitivity of 
dB and 
deg rms respectively over 30% instantaneous
bandwidth for the transmission, and 23% for the reflection.
Improvements relative to the first version include new harmonic
mixers, and an active doubler. Dynamic ranges up to 60 dB in
transmission and 50 dB in reflection are obtained up to 280 GHz, with
more than 50 GHz instantaneous bandwidth using waveguide
calibration. Detection with a 30 dB dynamic range is obtained at 320
- 360 GHz. Time domain measurements give spatial resolution down to
2 mm.
To appear in: Digest of the 20th Int. Conf. on
Infrared and Millimeter Waves, Florida, USA, Dec.
1995.
lucas@iram.fr