Harmonic oscillator using transmission line resonator
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United States of America Patent
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May 26, 2009
Grant Date -
Jul 19, 2007
app pub date -
Jan 17, 2007
filing date -
Jan 18, 2006
priority date (Note) -
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Abstract
A harmonic oscillator comprises a transmission line resonator in which an oscillation frequency depends on an electrical length of a transmission line and both ends of the transmission line are electrical open ends; an active element for oscillation as a negative resistance connecting to the transmission line resonator; an output line connected to a midpoint portion of the transmission line resonator; and electrical and/or physical suppressing means for suppressing a voltage displacement distribution of second harmonic among the even-order harmonics. The suppressing means is provided at a position which is at least a minimum voltage displacement portion for the second harmonic between the midpoint portion and either ends of the transmission line resonator.
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