COHERENT SUPERHETERODYNE SPECTROMETER OF ELECTRONIC PARAMAGNETIC RESONANCE Russian patent published in 1995 - IPC

FIELD: technical physics. SUBSTANCE: device has signal microwave generator 1, heterodyne microwave generator 2, measuring attenuator 3, reference channel mixer 4, signal channel mixer 5, circulator 6, measuring resonator 7, reference channel intermediate frequency amplifier 8, signal channel intermediate frequency amplifier 9, phase discriminators 10 and 11, high-stability intermediate frequency reference source 12, synchronous detectors 13 and 14, intermediate frequency phase shifters 15 and 16, third mixer 17, third intermediate frequency amplifier 18, harmonic oscillator 19, mode switch 20, measuring resonator resonant frequency tuning element 21. Reference channel intermediate frequency amplifier 8 is designed as normalizing amplifier generating voltage level, first and second phase shifters have fixed phase shift. EFFECT: simplified tuning, increased stability, increased resolution. 1 dwg