1. Microwave radiation sources with precise frequency control (Backward-Wave Oscillator based frequency synthesizers):
   35-400 GHz range
   400-1200 GHz range
2. Spectrometer with frequency synthesizer and Radio Acoustical Detection of absorption (RAD spectrometer)
3. Continuously frequency scanning RAD spectrometer with BWO stabilized against Fabry-Perot cavity (RAD-3)
4. BWO radiation frequency multipliers:
   Multipliers for millimeterwave range sources
   Multipliers for SubMM range sources
   Method of measurements of multiplier conversion losses
5. Resonator spectrometer for atmosphere study and ultralow absorption measurements in dielectrics
6. Subterahertz radiation source stabilized by laser comb

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