The invention concerns an ultrahigh frequency emitting device, having:
at least a first and a second microlaser (22, 24), emitting at two
different frequencies .omega..sub.1 and .omega..sub.2,
means of slaving the first and the second microlaser frequency-wise,
an array of N elements (N.gtoreq.2) (52, 54, 56, 58) placed on the path of
the beam of the second laser, each element making it possible to impose a
phase delay on the beam which passes through it,
N means (26, 28, 30, 32) for mixing the beam emitted by the first laser and
each of the N delayed beams, and for producing N signals of frequency
.omega..sub.1 -.omega..sub.2,
N antenna-forming means (34, 36, 38, 40) for emitting radiation at the
frequency .omega..sub.1 -.omega..sub.2.
