Oscillators are constructed using bipolar transistors or Gunn diodes. Ultra-low phase noise is assured without neither cryogenic technique nor any additional radio engineering means. Oscillators could be completed by built-in ferrite insulators and mechanical attenuators. The article itself is the bipolar transistor or Gunn oscillator stabilized by described resonator and complemented with the built-in thermostat. In physical researches, instrumentations and other application areas As ultra-low noise high spectral purity stable microwave sources.
Oscillators are surely suitable for overland, water, air and space vehicle borne equipment.
There is an idea of the way of considerable decreasing the long-term frequency instability.