Oscillators – Solid state active element oscillator – Significant distributed parameter resonator
Patent
1984-12-10
1986-05-20
La Roche, Eugene
Oscillators
Solid state active element oscillator
Significant distributed parameter resonator
331 96, H03B 536
Patent
active
045904413
ABSTRACT:
A filter reflection image guide oscillator and a line scanning device. The device includes a brass metal heat sink base on which a dielectric waveguide is mounted. A resonant cavity is defined in the dielectric waveguide and an oscillator diode, Gunn or IMPATT, for example, is located in the resonant cavity. The resonant cavity is enclosed by a metal cover with a post which is made to extend into the resonant cavity to contact one electrode of the oscillator diode. The top surface of the waveguide includes a perturbation surface consisting of parallel and spaced metal stripes which are laterally positioned along the length of the waveguide. The spacing of the metal stripes defines the function performed by the device. When the stripes are at 1/2.lambda..sub.z spacings (.lambda..sub.z is the guide's longitudinal wavelength), a filter reflection image guide oscillator is provided and the perturbation surface is non-radiative. Only a small portion of the energy radiates out of the front of the waveguide. When the spacing is in the order of .lambda..sub.z .+-..DELTA..lambda..sub.z, the perturbation surface becomes a radiating antenna and the radiation front leaves the pertubation surface at an angle with respect to the top surface. By changing the bias voltage of the oscillator diode or with the addition of a varactor with a separate DC bias source, the frequency in the waveguide can be changed and thus line scanning or beam steering is made possible.
REFERENCES:
patent: 3986153 (1976-10-01), Kuno
IEEE Transaction on Microwave Theory and Techniques, vol. MTT-30, No. 5, 1982, R. E. Horn et al., "Single Frequency Electronic-Modulated Analog Lines Scanning Using a Dielectric Antenna", pp. 816-882.
IEEE Transactions on Microwave Theory and Techniques, vol. MTT-27, No. 5, May 1979, Tatsuo Itoh et al., "Distributed Bragg Reflector GUNN Oscillators for Dielectric Millimeter-Wave Integrated Circuits", pp. 514-518.
Horn Robert E.
Jacobs, deceased Harold
La Roche Eugene
Lane Anthony T.
Murray Jeremiah G.
Rehberg John T.
The United States of America as represented by the Secretary of
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