SU1401396A1 - Device for measuring microwave frequencies - Google Patents

Abstract

The invention relates to a measurement technique. The purpose of the invention is to expand the frequency range of measurements and improve the measurement accuracy. The device includes hollow conductive cylinders 1, longitudinal slits 2, detectors 4. To achieve the goal, conductive plates 3 are inserted, between which there is a frequency filter made in the form of two hollow conductive cylinders 1 with longitudinal slots 2 arranged in a linear manner is achieved by placing detectors 4 on the straight, perpendicular axes of hollow conductive cylinders 1. The device is applicable for frequency tolerance control, because it provides tuning for a certain ratio of amplitudes, increase or decrease in which m. Used to signal when the operating frequency range is out of range. In the device by more than the order of pacuJHpeii, the operating frequency range, as well as the total frequency measurement error, is significantly reduced. 2 Il. and (L

Description

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I The invention relates to a technique for measuring; Research institutes, namely, devices for measuring frequency, adapted for measuring in circuits with distributed parameters, are intended for use as a device for measuring ultrahigh frequencies.

The purpose of the invention is to expand the frequency range of measurements and increase; measurement accuracy.

In this case, the resonant frequency can be more than doubled.

The detectors 4, located between the longitudinal bars, of the 2 hollow conductive cylinders 1, are field field sensors.

For accurate operation of the device, it is necessary to place the detectors on the straight perpendicular to the axis of the hollow conductive cylinders 1. Such an arrangement dictates FIG. Figure 1 shows the design of the device with the need for minimal variation to measure the ultrahigh coupling degree of each detector with the sweat; in fig. 2 is a view A of FIG. one.

A device for measuring ultrahigh frequency includes hollow conductive cylinders 1, longitudinal slits 2, conductive plates 3 and detectors 4.

The device works as follows.

The electromagnetic wave propagated by hollow conductive cylinders 1 reaches the area where the conducting plates 3 are located.

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When changing the distance between the hollow conductive cylinders 1, the device is otherwise unbalanced and calibration is required.

The unequivocal dependence of the critical frequency of an electrodynamic system on the distance between hollow conducting cylinders 1 makes it possible to determine its value in a strictly definite way, which makes it possible to reduce the error in determining the critical frequency to errors in measuring the distance between hollow conducting cylinders 1.

Collinearly arranged hollow conductive cylinders 1 are a guide structure that supports the propagation of vibrations of several types. Such a system, which is electrodynamic

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The unequivocal dependence of the critical frequency of an electrodynamic system on the distance between hollow conducting cylinders 1 makes it possible to determine its value in a strictly definite way, which makes it possible to reduce the error in determining the critical frequency to errors in measuring the distance between hollow conducting cylinders 1.

Thus, in the proposed technical solution, the possibility has been obtained by exactly the analogue of a two-wire line, which possesses a null definition of the critical frequency of the rai-left critical frequency.

The closure of hollow conductive cylinders 1 through conductive plates 3 introduces a perturbation into the spectrum of the natural frequencies of such a system and, as a result,

A low-frequency cut-off is provided, and the 30 section, the error of the reading device, the amplitude of the arrangement of the conductive plates of the signal before and after the filter, reduces it in an even way, while achieving a new quality, consisting in the possibility of flexible use of the device.

For example, the choice of the ratio between the measured and critical frequencies is posed by an outlying waveguide.

The frequency of the low-frequency cutoff coincides with the frequency of the transverse resonance of two slit cylinders antiphase in the magnetic field.

A change in the distance between the cylinders, §, leads to a change in the frequency of the 1-transverse resonance and, therefore, the value of the research institute of the frequencies) 1 of the low-frequency cutoff. Thus, the proposed system is an I out-of-limit waveguide with a tunable critical frequency. I - Dependence of the frequency of the transverse resonance I of the parameters of the system has the form:

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 + k + 21p) -;

 + (+ lln (-)) +

(l + T) -l is the wall thickness of hollow conductive cylinders 1;

the linear size of the longitudinal slit 2;

inner diameter of hollow conductive cylinders 1;

v-lr. In this case, the resonant frequency can be more than doubled.

The detectors 4, located between the longitudinal bars, of the 2 hollow conductive cylinders 1, are field field sensors.

For accurate operation of the device, it is necessary to place the detectors on the direct perpendicular axes of the hollow conductive cylinders 1. This arrangement dictates the need for a minimum change in the degree of communication of each detector with

When changing the distance between the hollow conductive cylinders 1, the device is otherwise unbalanced and calibration is required.

The unequivocal dependence of the critical frequency of an electrodynamic system on the distance between hollow conducting cylinders 1 makes it possible to determine its value in a strictly definite way, which makes it possible to reduce the error in determining the critical frequency to errors in measuring the distance between hollow conducting cylinders 1.

Thus, in the proposed technical solution, it is possible to accurately determine the critical frequency, the accuracy of the reading device, the amplitude of the signal before and after the filter, reduces in an even way, while achieving a new quality, consisting in the possibility of flexible use of the device.

For example, by choosing the ratio between the measured and critical frequencies, the system will collapse to a minimum, since the reading device operates in the optimal range of measured values.

In addition, the device is applicable for

5 of the tolerance frequency control, since it allows tuning to a certain amplitude ratio, the excess or reduction of which can be used to signal that the working frequency range is out of range.

Thus, in the invention, the operating frequency range is extended by more than an order of magnitude, and the overall frequency measurement error is significantly reduced.

Claims (1)

Apparatus for measuring ultra-high frequency, which contains a frequency filter and a detector, characterized in that, in order to expand the frequency range of measurements and improve measurement accuracy, conductive plates are inserted, between which a frequency filter is located, made in the form of Collinearly arranged two hollow conductive cylinders with longitudinal slots oriented toward each other, with the possibility of changing the distance between 5 them, and the detectors are located between the longitudinal slots of two hollow conducting cylinders on a straight, perpendicular cylinder axis. five 0 figure 1