QuinStar Technology’s series QTV varactor-tunable Gunn oscillators cover the frequency range of 18 to 110 GHz in seven waveguide bands. These oscillators combine proprietary cavity design, abrupt or hyper-abrupt tuning varactor diodes and high performance Gunn diodes to produce power in the millimeter wave frequency range. Tuning voltages range from 0 to +20 VDC. The electrical tuning rate may be as high as 50 MHz (20ns per sweep).
Each oscillator has an internal low frequency suppression circuit to ensure stable RF oscillation and over-voltage protection. Mechanical tuning in addition to voltage tuning can be offered as an option. Gunn oscillators can be provided with broader tuning ranges, higher power levels, temperature controlled heaters, integral isolators and voltage regulators.
These varactor-tunable Gunn oscillators exhibit low AM and FM noise, moderately high output power and wide tuning bandwidth, as well as monotonic tuning characteristics. These characteristics make the oscillator a unique low cost solution for most FM transmitter, local oscillator, AFC loops and phase locked subsystem applications.
For many applications, a bias tuned Gunn oscillator is adequate. Please see mechanically-tunable Gunn oscillators (series QTM) and contact QuinStar for more information.