METHOD TO MEASURE RESONANCE STRUCTURE CHARACTERISTICS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2014 - IPC G01R27/04 

FIELD: measurement equipment.

SUBSTANCE: invention is related to the equipment for resonance radiotechnical measurements. The method involves generation of probing oscillation, its supply to the input and receipt from the output of a resonance structure, tuning of probing oscillation frequency in the measurement range corresponding to the resonance structure frequency band, registration of changes in its parameters according to which resonance frequency, resonance amplitude and Q-factor of the resonance structure are defined. The probing oscillation at the resonance structure is formed as double-frequency one with two components of equal amplitude with average frequency and initial difference frequency being less than or equal to the resonance structure frequency band. The resonance frequency of the resonance structure is measured at the time point when the modulation factor of the waveform envelope for beat signals between the probing oscillation components at the resonance structure output reaches the value 1, the resonance frequency is measured as equal to the value of the average frequency. The resonance amplitude of the resonance structure and the Q-factor of the resonance structure are calculated. Afterwards the initial difference frequency is changed with the average frequency of the probing oscillation remaining the same. Then the amplitude of the waveform envelope for beat signals between the probing oscillation components at the resonance structure output is measured. The device comprises a frequency tuned generator 1, a commutator 2, a detector 3 connected to a controller 4 for control and measurement of resonance structure characteristics, as well as sequentially connected units: the first transmission line 5, a resonance structure 6 and the second transmission line 7; the first commutator 2 output is connected to the input of the first transmission line 5, its second input - to the output of the second transmission line 7, and its second output - to the input of the detector 3. The frequency tuned generator 1, commutator 2 and controller 4 for control and measurement of resonance structure characteristics are fitted by control inputs/outputs combined into a control bus 8. A converter 9 of single-frequency oscillation to a double-frequency one is additionally introduced, the detector 3 is made as a detector of the envelope; the single-to-double frequency oscillation converter 9 is fitted by control inputs/outputs connected to the control bus 8, its input is connected to the output of the frequency tuned generator 1 and its output - to the first input of the commutator 2.

EFFECT: increased sensitivity and accuracy of measurements.

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