Спосіб вимірювання мінімально досяжного вхідного активного опору чотириполюсника

Abstract

The proposed method for determining minimal input resistance of a four-pole consists in applying electromagnetic oscillations with constant power and frequency to the input of the unreciprocal four-pole and measuring the electromagnetic oscillation power at the four-pole output. Then the first impedance element with a known active component is connected to the four-pole input, and the output impedance of the electromagnetic oscillator is matched to the input impedance of the four-pole when the said first impedance element is connected. Then the output impedance of the four-pole is matched to the input impedance of the electromagnetic oscillation power meter, and the electromagnetic oscillation power at the four-pole output is measured. Then the first impedance element is disconnected from the four-pole input, the second impedance element with a known active component is connected, and the output impedance of the electromagnetic oscillator is matched to the input impedance of the four-pole when the said second impedance element is connected. The output impedance of the four-pole is matched to the input impedance of the electromagnetic oscillation power meter, and the electromagnetic oscillation power at the four-pole output is measured. Then the electromagnetic oscillator is connected to the four-pole output, and the electromagnetic oscillation power meter is connected to the four-pole input when the said second impedance element is connected. The output impedance of the electromagnetic oscillator is matched to the output impedance of the four-pole, the input impedance of the electromagnetic oscillation power meter is matched to the input impedance of the four-pole when the said second impedance element is connected, and the electromagnetic oscillation power at the four-pole input is measured. The second impedance element is disconnected from the four-pole input, the first impedance element with a known active component is connected, the output impedance of the electromagnetic oscillator is matched to the output impedance of the four-pole, the input impedance of the electromagnetic oscillation power meter is matched to the input impedance of the four-pole when the said first impedance element is connected, and the electromagnetic oscillation power at the four-pole input is measured. The minimal input resistance of a four-pole is determined from a specified equation, using the measurement data.