FIELD: high frequency electric measurements, possible use for determining complex parameters of a dipole.
SUBSTANCE: in a device for measuring changing parameters of passive dipole, comprising generator of high frequency harmonic electric signal, output of which is connected to first input of differential amplifier and to first gate, output of which is connected to second input of differential amplifier, and also through a filter and cable line to the dipole being researched, parameters of which change under effect of external factors, and detector of electric signal, new feature is that output of generator is connected to first input of differential amplifier through second gate, to output of which standard resistor is connected, also connected to output of generator are inputs of third and fourth gates, outputs of which through phase shifters are connected to first inputs of two mixers, second inputs of which are connected to output of differential amplifier, while shift of phases between phase shifters equals 90°, and outputs of mixers are connected to detector of electric signal, which is made in double-channel form.
EFFECT: increased efficiency.
1 dwg
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