METHOD FOR CALIBRATING TWO-CHANNEL SUPERHETERODYNE RECEIVER IN METER OF COMPLEX TRANSMISSION AND REFLECTION COEFFICIENTS OF MICROWAVE DEVICES WITH FREQUENCY CONVERSION

摘要

FIELD: measuring equipment.;SUBSTANCE: invention relates to a radio measuring technique and can be used in the calibration of meters of complex transfer coefficients of microwave devices with frequency conversion. Calibration method of a two-channel superheterodyne receiver in the meter of complex transmission and reflection coefficients of microwave devices with frequency conversion involves measuring the difference Δϕ_OK between the phase angle of the reference microwave device with frequency conversion and the phase of the coherent reference signal from the reference signal generator and the measurement of the difference Δϕ_IR between the phase angle of the microwave device under study with frequency conversion and the phase of the coherent reference signal from the reference signal generator. It is proposed to attach a reference microwave device with frequency conversion in the measuring channel of a two-channel superheterodyne receiver and measure the phase difference ϕ_T between the intermediate frequency signal received from the reference microwave device with frequency conversion in the measuring channel, and the reference signal received from the reference signal generator, then connect the reference microwave device with frequency conversion to the reference channel of a two-channel superheterodyne receiver and measure the phase difference Δϕ_OK between the intermediate frequency signal, received from the reference microwave device with frequency conversion in the reference channel, and the reference signal received from the reference signal generator, then calculate the calibration parameter Δϕ_C=ϕ_T-Δϕ_OK. Further, having attached the studied microwave device with frequency conversion to the measuring channel of a two-channel superheterodyne receiver, measure difference Δϕ_IR between the phase angle of the investigated microwave device with frequency conversion and the phase of the coherent reference signal, which is obtained from the generator of the reference signals. Then the difference is finally calculated Δϕ=Δϕ_IR-Δϕ_K-Δϕ_OK between the phase angle of the investigated microwave device with frequency conversion and the reference microwave device with frequency conversion.;EFFECT: technical result is to increase the measurement accuracy, simplify the measurement process, reduce the number of operations required for calibration.;1 cl, 2 dwg