Two types of receivers have been developed at Yebes Observatory: The Tri-band receiver and the Broad-band receiver.

    • RAEGE Tri-band receivers

The VGOS RAEGE tri-band receiver work at S/X and Ka bands. They have been developed at Yebes laboratories and constructed for the first RF and VLBI tests.

The main advantages of this world class tri-band cryogenic receiver are the simultaneous S/X/Ka operation with dual circular polarization, the backward compatible with legacy VLBI stations, X/Ka VLBI measurements, the reduced feed size for cooling down to 15 Kelvin, and the easy cal signal injection in front of LNA's. It also allows characterization of radio telescope pointing, tracking and gain at high frequencies (32 GHz).

The average receiver noise temperatures are 21 Kelvin in S-band, 23 Kelvin in X-band, and 25 Kelvin in Ka-band. The antenna efficiency that can be achieved with this feed and a ring focus antenna is between 0.65 and 0.75.

Three of these receivers are currently running at Santa Maria (Azores), Ishioka (Japan) and Ny-Älesund (Norway).

More information can be found here.

Triband cryostat



Triband receiver ready for VGOS radio telescope installation