Frequency multipliers for extension of frequency range of millimeter wave synthesizers

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.