Low phase-noise device comprising a microstrip-mounted coaxial d

Details Low phase-noise device comprising a microstrip-mounted coaxial d Low phase-noise device comprising a microstrip-mounted coaxial d

1999-07-06

2000-09-05

Lee, Benny

Oscillators

With distributed parameter resonator

331 99, H03B 518

Patent

active

061149187

ABSTRACT:
A low phase-noise device, like e.g. a microstrip-mounted voltage-controlled oscillator (VCO) is described, and also a method of reducing such a noise in such devices or other devices comprising a microstrip-mounted coaxial ceramic resonator. In practice, a recess is made in the metallic support, opening towards the substrate, extending beneath the terminal area of the ceramic resonator or, possibly, even beyond it. Said recess is filled with air and the layer of electrically conducting material between the substrate and the metallic support at said recess is removed.

REFERENCES:
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patent: 5124675 (1992-06-01), Komazaki et al.
patent: 5742091 (1998-04-01), Hebert
patent: 5834981 (1998-11-01), Trier et al.
patent: 6011446 (2000-01-01), Woods
P.C. Kandpal et al, "A Broadband VCO Using Dielectric Resonators", 19888 IEEE MTT International Microwave Symposium Digest, vol. 2, May 25, 1988, pp. 609-612, XP002116907.
D. I. Pollidi, Design Method for a Coxial-Resonator Oscillator, RF Design, vol. 18, No. 10, Oct. 1, 1995 pp. 66, 68 XP000548232.

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