An efficient Schottky-varactor frequency multiplier at millimeter waves. Part II: Tripler |
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Authors: | Timo J Tolmunen and Antti V Räisänen |
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Institution: | (1) Radio Laboratory, Helsinki University of Technology, Otakaari 5 A, 02150 Espoo, Finland |
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Abstract: | The multiplication efficiency of millimeter wave triplers was studied. In the case of a commercially available Schottky-varactor, the tripler efficiency versus pump power, bias voltage, and embedding impedances at the fundamental and harmonic frequencies was simulated using a nonlinear analysis program. A scaled model of a waveguide mount was used to experimentally optimize the impedances. For experimental verification a tripler from 33–39 GHz to 99–117 GHz was constructed. The highest efficiency measured was 28% at 107 GHz with 5 mW input power. The highest efficiency obtained with 30 mW input power was 18%. |
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Keywords: | frequency multiplier tripler millimeter waves Schottky-varactor efficiency scaled model embedding impedance |
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