We coupled the radiation emitted by arrays of Josephson junctions oscillato
rs to detector arrays of small Josephson junctions. The number of junctions
in the detector array ranges up to 1536, which is typical for a 1V standar
d array operation. Evidence is presented that both uniform coupling of the
emitted radiation over all the small junctions arrays and coherent emission
of the Josephson oscillators can be achieved. PACS numbers: 74.50. + r, 74
.40. + k.