Ka-band Gunn-varactor voltage controlled oscillator mode jumping

Nizar Sultan; Tony Pellerin

doi:10.1117/12.224256

13 October 1995 Ka-band Gunn-varactor voltage controlled oscillator mode jumping

Nizar Sultan, Tony Pellerin

Proceedings Volume 2558, Millimeter and Submillimeter Waves II; (1995) https://doi.org/10.1117/12.224256
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Mode jumping, by sudden frequency and power changes in Gunn-varactor voltage controlled oscillators, VCO's, is analyzed theoretically. This uses a double radial line equivalent circuit for VCO with metallized discs on microwave integrated circuit across a reduced height waveguide. Theoretical predictions are demonstrated in numerous experimental verifications. Finally, a simple method is proposed to avoid mode jumping in such a VCO, which is no longer unpredictable: in increasing the length of the short circuit plunger, L_SC, the VCO should only be tuned for L_SC values corresponding to the descending curves of the tuning range versus L_SC graphs. These are identified as the stable VCO operation modes.

Citation Download Citation

Nizar Sultan and Tony Pellerin "Ka-band Gunn-varactor voltage controlled oscillator mode jumping", Proc. SPIE 2558, Millimeter and Submillimeter Waves II, (13 October 1995); https://doi.org/10.1117/12.224256

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