20-40-GHz broadband frequency doubler with gallium aresenide varactor.
A crossed waveguide type varactor frequency doubler is described here which gives a conversion efficiency of 39% and a 4-GHz bandwith (-1 dB) around 40 GHz for 100-mW input power. Gallium arsenide varactor diodes in commerical packages are used, permitting great flexibility, in particular in molecular spectroscopy experiments.
Jounet
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Laboratoire de Resonance magnetique, Equipe associee au C.N.R.S., Universite Pierre et Marie Curie, 4 place Jussieu, 75230-Paris, Cedex 05, France.
Fourrier
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