Patent ID: 8053720

Claim:
A multi-frequency millimeter-wave Very Long Baseline Interferometry (VLBI) receiving system comprising: a receiver room; a first mirror configured and positioned to introduce a cosmic radio wave signal beam propagated from a celestial point into the receiver room a plurality of low pass filters having different bandwidths configured for frequency dividing the cosmic radiowave signal beam into a plurality of divided beams according to frequency; a plurality of second mirrors, each second mirror positioned to reflect at least one of the plurality of divided beams from a respective low pass filter; a plurality of receivers having different bandwidths, each receiver receiving at least one beam from the plurality of divided beams reflected by at least one second mirror from the plurality of second mirrors, each receiver having a frequency band corresponding to the bandwidth of a respective low pass filter; and apparatus for simultaneously observing, and compensating for, the phase variations of the divided beams.