Communications: directive radio wave systems and devices (e.g. – With particular circuit
Reexamination Certificate
2007-09-04
2007-09-04
Sotomayor, John B. (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
C342S070000, C342S041000, C342S132000, C342S134000, C331S00100A, C331S1070DP
Reexamination Certificate
active
11169222
ABSTRACT:
A high-frequency oscillator that can tune oscillation characteristics is provided. A high-frequency oscillator includes a Gunn diode serving as a high-frequency oscillation element that generates high-frequency signals, a resonator connected to the Gunn diode, a varactor diode serving as a variable-capacitance element that is disposed on the resonator and changes a resonance frequency, and a bias supply circuit that is connected to the varactor diode and supplies a bias voltage applied in order to change a capacitance. The bias supply circuit includes a trimmable chip resistor serving as a pre-set variable resistor that regulates a bias voltage applied to the varactor diode. By regulating the resistance value of the trimmable chip resistor, it is possible to control the capacitance value of the varactor diode and tune oscillation characteristics to a desired state.
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“Linear crystal controlled FM source for mobile radio application”, Arakelian, R.; Driscoll, M.M. Vehicular Technology, IEEE Transactions on vol. 27, Issue 2, May 1978 pp. 43-50.
Hayata Kazuki
Kishida Yuji
Hogan & Hartson LLP
Kyocera Corporation
Sotomayor John B.
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