Title :
A Millimeter Wave Schottky-Varactor Doubler with a Wide Tunable Frequency Range
Author :
Tolmunen, Timo J. ; Raisanen, Antti V. ; Lehto, Arto O.
Author_Institution :
Helsinki University of Technology, Radio Laboratory, Espoo, Finland
Abstract :
The efficiency of mm-wave doublers with a wide tunable frequency range was studied. The efficiency depends on the varactor parameters and the embedding impedances seen by the diode at fundamental and harmonic frequencies. Mm-wave doublers were simulated with a computer to find optimum embedding impedances for a given diode. A scaled model was constructed in order to search for optimum impedances for wide-band doublers in practice. For experimental verification a doubler from 40-60 GHz to 80-120 GHz was constructed. An efficiency > 30 % was obtained at the output frequency range from 75 to 96 GHz at various input power levels between 2 and 20 mW. The highest efficiency measured was 42 % at 88.6 GHz with 10 mW input power.
Keywords :
Computational modeling; Computer simulation; Frequency; Impedance; Local oscillators; Power generation; Schottky diodes; Tunable circuits and devices; Varactors; Voltage;
Conference_Titel :
Microwave Conference, 1986. 16th European
Conference_Location :
Dublin, Ireland
DOI :
10.1109/EUMA.1986.334200
