Microwave oscillators and transmitters with frequency stabilizat

Details Microwave oscillators and transmitters with frequency stabilizat Microwave oscillators and transmitters with frequency stabilizat

1992-09-30

1994-03-15

Mis, David

Oscillators

Automatic frequency stabilization using a phase or frequency...

Oscillator with distributed parameter-type discriminator

331 26, 331107DP, 331 96, 331 36C, H03B 714

Patent

active

052948951

ABSTRACT:
In addition to a first opening (11) forming a primary output from a waveguide cavity (10) of a microwave oscillator, a coupling aperture (12) in a reflective wall (32) provides a secondary output which does not degrade the performance or tuning characteristics of the source. Less than -20 dB of the source power may be coupled out via the aperture (12) and is used in a feed-back loop (12,21,23,24,36) with an harmonic mixer (21) and frequency discriminator (24) to stabilize the source. The mixer comprises a further waveguide section (15) separated from the source cavity (10) by the reflective wall (32). An advantageous mixer assembly comprises a circuit substrate which is mounted across the further waveguide cavity (15) and which carries an inductive probe by which the signal from the coupling aperture (12) is fed to an antiparallel pair of mixer diodes on the substrate. The whole assembly may be bolted together through holes (34).

REFERENCES:
patent: 3510800 (1970-05-01), Kaneko et al.
patent: 3626327 (1971-12-01), Luchsinger et al.
patent: 3705364 (1972-12-01), Takeshima
patent: 3737804 (1973-06-01), Sakamoto et al.
patent: 4201956 (1980-05-01), Kienberger et al.

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