LOADS FOR RADIOMETRIC REFERENCE

LOADS FOR RADIOMETRIC REFERENCE

Pasquali Microwave Systems supplies a wide range of microwave absorbers to support the calibration and test of wireless & satellite antenna systems. Eccosorb large calibrator plates and small targets (loads) have been manufactured for ESA Planck LFI operating at a temperature of 4K.

CYLINDRICAL CRYOGENIC CALIBRATOR (SKY LOAD)

The cylindrical calibrator (diameter = 200 mm; height = 300 mm) has internal walls completely covered by a layer squared base pyramids in ECCOSORB™ (height= 30 mm; base length = 5 mm). The layer of pyramids absorbs the RF power and minimizes reflections, thus reproducing a “blackbody”, i.e. a clear sky. The calibration of a single radiometer is performed when its feed-horn is placed into the cylinder.

CALIBRATOR FOR SATELLITE RADIOTELESCOPE

Developed for on-earth calibration of ESA PLANCK LFI (Low Frequency Instrument).
This calibrator is made of 40 panels of ECCOSORB™ pyramids covering an aluminium plate with diameter 780 mm. The pyramids (height= 20 mm; base length = 10 mm) are sized so that the full layer of ECCOSORB™ behaves as a “blackbody” i.e. absorbing al RF emissions up to Q-Band, thus permitting the on-earth calibration of the radiotelescope instrument.

70 GHZ TARGET

This 70 GHz flight model consists of an aluminum box containing an ECCOSORB™ target (Size: 18 mm x 14 mm x 11 mm). Thermal conduction between Aluminium and Eccosorb in cryogenic environment till 4K is assured.
Each target passed vibration tests, as Flight Specification, and RF tests.

ABSORBING LOAD





ABSORBING LOADCYLINDRICAL CRYOGENIC CALIBRATOR (SKY LOAD)CALIBRATOR FOR SATELLITE RADIOTELESCOPE70 GHZ TARGET