This paper has a deal with the frequency range extension of millimeter wave
synthesizers (26-118 GHz) through frequency multiplication to provide a re
liable, relatively inexpensive, acid simple in operation tunable synthesize
d sources up to submillimeter-wave length band. Frequency doublers and trip
lers using planar GaAs Schottky barrier diodes as the non-linear element ha
ve been developed. Description of their waveguide mounts having no any exte
rnal tunings and biasing is given. Harmonic generation conversion loss at v
arious frequencies for several practical multiplier assemblies are presente
d.
Examples of practical application of such source (synthesizer + multiplier)
in microwave spectroscopy are demonstrated.