SU1511709A1 - Apparatus for determining q-factor of resonators - Google Patents

Abstract

The invention can be used to determine the quality factor of the resonators. The goal is to improve the accuracy while simplifying the device by the fact that switch 2 is designed as a phase controller 0-180 °, as well as introducing new electrical connections at peak detectors 5, 7, comparator 6, excitation system 1 and directional element 3 connection. The device also contains a signal detector 8, a pulse former 9 and a counter 10. 1 sludge.

Description

315

The invention relates to a technique of radio engineering measurements and can be used to determine the quality factor of the resonators.

The purpose of the invention is to improve accuracy while simplifying the device.

The drawing shows a structural electrical circuit of the device.

The device contains a series-connected excitation system 1, a switch 2, a directional coupling element 3 —and a resonator 4 under investigation, the output of which is connected to the input of the first peak detector 5 through a directional communication element whose output is connected to one of the comparator 6 inputs, the second input of which is connected to the output of the second peak detector 7, connected by its input to the output of the excitation system, the output of the comparator is connected to one of the inputs of the signal selector 8 connected by another input to the output of the resonator through the direction of the communication element, and the output to the input of the imaging unit 9 and the power supply connected to the 10 “

The device works as follows.

When the excitation system 1 is turned on, the input signal through the phase-manipulator 2, which is in the 0 ° state, and through the directional communication element 3 is fed to the resonator 4 under study and energy is accumulated in the resonator to a stationary state.

At the same time, the envelope of the signal reflected from the resonator, which is provided by the peak detector 5, does not exceed the level of the incident wave, selected by the peak detector 7, therefore the comparator 6 does not produce an aperture that unlocks the signal selector 8, and no counting occurs the resonator changes phase by 180 °, the envelope of the reflected signal at the input of the comparator exceeds the level 3J 1

. 7

time, where Q QO / Q au is the parameter of the communication, Qj, Q, "(- intrinsic and externally of good quality, at the output of the comparator a signal appears that unlocks the signal selector 8, the frequency of the input signal oscillates through

wen of incident wave in M

four

shaper 9 and in the form of a meander come to the counter 10, i.e. the counting begins. “With a further decrease in the reflected signal from the resonator, exponentially, the signal at the output of the peak detector 5 decreases to the level of the signal at the output of the peak detector 7 (the level

of the incident wave), the output voltage of the comparator disappears, the signal selector is locked, the count stops. Thus, the count, i.e. determining the number N of damped oscillations, occurs during the time during which the amplitude of the envelope of the signal reflected from the resonator under study in the transition process at the time of comparison with the level of the incident

the signal decreases by a maximum of M times. Loaded Q-factor is determined by simple recalculation, as Q 4.53N.

I.

The proposed device is characterized by hardware simplicity, which was the result of exclusion from the prototype device of a large-scale amplifier, one comparator,

reference voltage source, the element OR, and the measurement error of the measurement by the magnitude of the order of t3, does not require the installation of the level M, the presence of the reference

voltage, and the process of measuring the number N is fully automated.

Claims (1)

Invention Formula Device for determining ext. the cavity of the resonators, containing the excitation system, a switch, a connected element of communication, connected in order of direction by the second arm to the terminal for connecting the resonator under investigation, connected in series by a signal selector, a pulse driver and a counter, connected in series the first peak detector, the output of which is connected to the first input of the comparator, and the input to the first input of the signal selector, and the second peak detector, which means that in order to improve the accuracy while simplifying the device | the switch is designed as a phase-ma- kkpul torus 0-180, the second peak 5 15117096 The detector is connected between the output of the detector and is connected to the third in- turn excitation and the second input of the directivity module by the directional arm, and the input of the first peak coupling element.