Microwave oscillator

Details Microwave oscillator Microwave oscillator

H - Electricity

03

B

331/12

H03B 9/14 (2006.01) H03B 1/00 (2006.01)

Patent

CA 1206538

14 ABSTRACT "Microwave oscillator" A microwave oscillator suitable for millimeter wavelengths comprises a Gunn diode (3) coupled to a waveguide (1) by a resonant- cap structure (5,6). The diode (3) generates microwave energy both at a fundamental frequency fo which is below the cut-off frequency of the waveguide (1) and at a second harmonic frequency 2fo above cut-off. To control the generation of microwave energy at 2fo, energy at fo may be coupled into the waveguide (1), e.g. from an adjacent further waveguide (9) above its cut-off, by means of an electric probe (8) extending close to the cap (5). The probe (8) may couple in a locking signal at or close to the free-running value of fo from another oscillator having better noise performance and electronic tuning, thereby locking 2fo to twice the frequency of the locking signal, or alternatively may couple to a varactor-tuned cavity resonant at fo.

444066

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