Millimeter-wave microstrip oscillators

Physics

Scientific paper

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Avalanche Diodes, Hybrid Circuits, Microstrip Devices, Microwave Oscillators, Millimeter Waves, Power Efficiency, Strip Transmission Lines, Bandwidth, Continuous Radiation, Frequency Control, Integrated Circuits, Ion Impact, Planar Structures, Transit Time, Tuning

Scientific paper

Hybrid-integrated millimeter-wave sources at 30, 60, and 100 GHz have been built using a novel oscillator configuration. The new structure features a planar microstrip circuit in a conducting channel with an IMPATT diode which is inserted into the side wall of the channel. RF efficiencies of 5% at an output power of a quarter-watt CW have been measured both at 30 and 60 GHz. The output power at 100 GHz is 25 mW with an efficiency of 2%. The oscillators can be readily tuned over a 10% bandwidth.

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