Millimeter wave microstrip voltage-controlled oscillator with ad

Details Millimeter wave microstrip voltage-controlled oscillator with ad Millimeter wave microstrip voltage-controlled oscillator with ad

1989-03-13

1990-03-06

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Significant distributed parameter resonator

331107G, 331177V, 333204, 333238, 333246, H03B 914

Patent

active

049069470

ABSTRACT:
A voltage-controlled oscillator (VCO) especially designed for use in the millimeter wave frequency band (Ka-band) and which exhibits an adjustable tuning sensitivity. A low tuning sensitivity is easily obtained, making it suitable for narrow-band FMCW applications. It comprises a Gunn diode as a negative resistance device and a voltage variable capacitance diode (varactor) as a tuning element. A fixed capacitance element is coupled in RF series with the varactor and microstrip transmission lines are configured to function as impedance matching, resonating and filtering elements. By incorporating the fixed capacitance in RF series with the varactor, the tuning sensitivity, measured in volts/Hz is markedly reduced. The VCO uses a novel RF structure which puts the fixed capacitance in RF series with the varactor, without introducing the fixed capacitance element in the varactor bias circuitry.

REFERENCES:
patent: 3566315 (1971-02-01), Vinding
patent: 4034313 (1977-07-01), Jones et al.
patent: 4310809 (1982-01-01), Buck et al.
patent: 4574256 (1986-03-01), Singh
patent: 4652836 (1987-03-01), Accatino et al.

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