RU2253124C1 - Fluctuations meter in high frequency connecting devices - Google Patents

Abstract

FIELD: electric engineering.

SUBSTANCE: device has setting generator, power divider, modulator, calibrator, amplitude-phase receiver, amplitude receiver, subtracting cascade and indicator. Amplitude and phase fluctuations, formed by the very researched high-frequency device, are separated from each other and from noises of measuring equipment. Sensitivity of device to amplitude and phase fluctuations, formed by researched high-frequency device, is increased due to separation of these fluctuations from amplitude and phase fluctuations resulting from conversion of amplitude and setting generator frequency conversions in researched high-frequency device.

EFFECT: higher efficiency.

1 dwg

Description

The invention relates to the field of measurement technology and is intended to measure amplitude and phase fluctuations in high-frequency (HF) feedthrough devices such as amplifiers, power limiters, phase shifters, arresters and other similar devices, including microwave devices and optical ranges.

We are talking about measuring low-frequency noise (LF) amplitude and phase modulations (fluctuations) created in electromagnetic oscillations by pass-through RF devices (including microwave and optical band devices) designed to work in modern coherent low-noise location and communication systems. It is known that stringent requirements are imposed on the levels of amplitude and phase fluctuations of such devices, the fulfillment of which is not possible without creating reliable and highly sensitive fluctuation meters that separate the amplitude and phase fluctuations of the transmitted RF device from each other, from the intrinsic noise of the measuring equipment, and from the influence of fluctuations of the master oscillator .

A known meter of fluctuations of RF oscillation sources (including microwave oscillation sources and optical ranges) [1], containing a calibrator, indicator and an amplitude receiver (its particular form is used in the meter — the simplest amplitude correlation type receiver consisting of a power divider ^*) ( ^*) Divider power in an explicit form in the description of the meter [1] is not mentioned, but certainly implied, since without a power divider it is impossible to supply a signal from a microwave (or RF) source to two independent microwave (or RF) detectors, as it is not this is necessary for the normal operation of the meter [1].) and two independent microwave detectors with a correlator) and which allows one to measure amplitude fluctuations in any sources of RF oscillations, including in a through-frequency RF device excited by a master oscillator.

In this known meter, the amplitude fluctuations of the feed-through RF device are separated from the intrinsic noise of the measuring device. However, the meter [1] cannot measure the phase fluctuations of the transmitted RF device and has low reliability and sensitivity of measuring amplitude fluctuations, since in it (in the meter) the amplitude fluctuations created by the RF pass-through device are not separated from the influence of the intermodulation components of the fluctuations associated with the conversion of the amplitude and frequency fluctuations of the master oscillator into the components of the amplitude fluctuations of the output oscillation of the transmitted RF device correlated with them.

Therefore, the functionality, reliability and sensitivity of this meter is not sufficient, and this meter is not suitable for measuring amplitude and phase fluctuations created by modern low-noise pass-through RF devices.

Also known is a meter of fluctuations of RF oscillation sources (including microwave oscillation sources and optical ranges) [2], containing a calibrator, indicator and an amplitude-frequency receiver (its particular form is used - a correlation-type amplitude-frequency receiver consisting of a power divider ^*) ( ^*) The term “voltage divider” is used in the description of the meter [2].), A resonant circuit, a carrier level compensator, a key, an RF switch, a phase discriminator, and an amplitude receiver with a sum-difference correlator a torus and with an LF switch, and allowing one to separately separate the amplitude or frequency fluctuations of the studied oscillation under the settings described in [2]).

, где t - текущее время в сек, _t1 - переменная интегрирования, размерность которой определяется пределами интегрирования.) флуктуации в любых источниках ВЧ колебаний, в том числе в проходных ВЧ устройствах типа усилителей, ограничителей мощности, фазовращателей, разрядников и других. Кроме того, в этом измерителе амплитудные и частотные (фазовые) флуктуации проходного ВЧ устройства отделены друг от друга и от собственных шумов измерительной аппаратуры, причем достоверность и чувствительность измерителя [2] по амплитудным флуктуациям выше, чем у известного измерителя [1].This well-known meter can measure not only amplitude, but also frequency (phase) ^**) ( ^**). It is known that the relationship of phase fluctuations φ (t) with equivalent frequency fluctuations f (t) is given by a known relation

, where t is the current time in seconds, _t1 is the integration variable, the dimension of which is determined by the integration limits.) fluctuations in any sources of RF oscillations, including in RF pass-through devices such as amplifiers, power limiters, phase shifters, arresters, and others. In addition, in this meter, the amplitude and frequency (phase) fluctuations of the RF pass-through device are separated from each other and from the intrinsic noise of the measuring equipment, and the reliability and sensitivity of the meter [2] in terms of amplitude fluctuations is higher than that of the known meter [1].

However, in the known meter [2], the amplitude and frequency (phase) fluctuations created by the RF pass-through device are not separated from the influence of the amplitude and frequency fluctuations of the master oscillator exciting the RF pass-through device.

Therefore, the reliability and sensitivity of the known meter [2] in terms of amplitude and frequency (phase) fluctuations in pass-through RF devices is not sufficient, and this known meter, like the well-known meter [1], is not suitable for measuring amplitude and frequency (phase) fluctuations created modern low-noise RF pass-through devices.

Finally, a fluctuation meter in pass-through RF devices (including microwave and optical range devices) is known [3], which we adopted as a prototype and contains a master oscillator (called a “microwave generator” in the description), a power divider (“divider” is called in the description), RF pass-through device (referred to as a “microwave amplifier” in the description), calibrator, indicator, and amplitude-phase receiver (its particular form is used in the meter — a correlation-type amplitude-phase receiver consisting of a carrier level compensator, RF switch, discriminator ^*) ( ^*) This refers to the phase discriminator.), The key and the amplitude receiver with the sum-difference correlator ^**) ( ^**) In the description of the meter [3], the "sum-difference cascade" is called.) And with the LF switch, and allowing the settings described in [3], to separate separately the amplitude or phase fluctuations of the studied RF oscillations), the first output of the power divider through the RF pass-through device and calibrator connected to the first input of the amplitude-phase receiver, the second input of which is connected to the second output of the power divider.

This well-known meter can measure both amplitude and phase fluctuations in RF pass-through devices such as amplifiers, power limiters, phase shifters, arresters, and other similar ones. In addition, in this known meter, the amplitude and phase fluctuations of the RF pass-through device are separated from each other and from the noise of the measuring equipment, and the sensitivity of the known meter [3] in amplitude and phase (frequency) fluctuations is higher than that of the known meter [2].

However, in the known meter [3], the phase and amplitude fluctuations created by the RF pass-through device are not separated from the influence of the intermodulation components of the fluctuations associated with the conversion of the amplitude and frequency fluctuations of the master oscillator into the amplitude and phase components of fluctuations correlated with them in the output oscillation of the RF pass-through device. Therefore, the reliability and sensitivity of a known meter [3] for amplitude and phase fluctuations are not sufficient, and this meter, like well-known meters [1, 2], is not suitable for measuring amplitude and phase fluctuations created by low-noise RF pass-through devices designed to operate in modern coherent systems of location and communication.

The technical problem to which the claimed invention is directed is to eliminate the noted disadvantages of the prototype, namely the creation of a fluctuation meter in RF pass-through devices such as amplifiers, power limiters, phase shifters, surge arresters and other similar devices (including microwave and optical ranges) with increased reliability and sensitivity measuring amplitude and phase fluctuations under conditions when the amplitude and phase fluctuations created by the RF pass-through device are not only separated from each other cursing and the noise-measuring apparatus, as occurs in the prior art, but also separated from the intermodulation products and frequency transformation of the amplitude of fluctuations in the oscillator correlated with their amplitude and phase components of the fluctuations are present in the output flow oscillation RF device.

To solve this technical problem, a known fluctuation meter in pass-through RF devices [3] (prototype) containing a master oscillator, power divider, RF pass-through device, calibrator, indicator and amplitude-phase receiver, where the first output of the power divider through the RF pass-through device and the calibrator is connected to the first input of the amplitude-phase receiver, the second input of which is connected to the second output of the power divider, a modulator, an amplitude receiver, and a frequency receiver are additionally introduced (unlike the prototype) k and the subtracting cascade, while the output of the master oscillator through the modulator is connected to the input of the power divider and the inputs of the subtracting cascade are connected: the first to the output of the amplitude-phase receiver, the second through the amplitude receiver to the third output of the power divider, the third through the frequency receiver to the fourth the output of the power divider, and the output of the subtracting cascade is connected to the indicator.

The inventive meter due to the presence of a modulator, an amplitude receiver, a frequency receiver and a subtracting cascade with their connections and the total combination of the claimed features has increased reliability and sensitivity of measuring amplitude and phase fluctuations belonging to the RF pass-through device, since it (in the inventive meter), having tuned the amplitude receiver for the allocation of amplitude fluctuations and the frequency receiver for the allocation of frequency fluctuations of the master oscillator, you can achieve the following p the results.

1. In the mode of measuring the amplitude fluctuations of the RF pass-through device, configure the amplitude-phase receiver to isolate the amplitude fluctuations of the output oscillation of the RF pass-through device (the tuning procedure is described in [3]) and adjusting the transmission coefficients of the signals in the amplification paths of the amplitude and frequency receivers (such adjustments always available in standard receivers), it is essential to weaken the influence of both amplitude and frequency fluctuations of the master oscillator on the result of registration of the studied amplitude fluxes by the indicator uttuations created by the RF pass-through device and counted by the calibrator.

2. In the measurement mode of phase fluctuations of the transmitted RF device, configure the amplitude-phase receiver to isolate the phase fluctuations of the output oscillation of the transmitted RF device (the tuning procedure is described in [3]) and, again adjusting the transmission coefficients of the signals in the amplification paths of the amplitude and frequency receivers, substantially to weaken the influence of both amplitude and frequency fluctuations of the master oscillator on the result of registration by the indicator of the investigated phase fluctuations created by the RF pass-through device and counted by alibratoru.

In addition to what was said in the inventive meter, due to the presence of a modulator, it is possible to optimize and control the results of these settings. To do this, in the indicated measurement modes, with the help of a modulator, first harmonic amplitude and then harmonic frequency modulations are first introduced into the output oscillation of the master oscillator, the values of which are 30-40 dB higher than the real values of the amplitude and frequency fluctuations of the master oscillator and then by adjusting the transmission coefficients of the signals amplification paths of the amplitude and frequency receivers, separately for each of the mentioned measurement modes, provide the settings of the subtracting cascade to the limit nye suppressing in its output signal, said harmonic modulation in comparison with cases where amplitude and frequency receivers are turned off. The values of the indicated suppressions (attenuations) are counted by the indicator and amount to at least 20 dB. Then the modulator is turned off and with the help of a calibrator, samples of the studied levels of amplitude and phase fluctuations created by the RF pass-through device are performed. Moreover, as follows from what has been said, in the inventive meter of the influence of both amplitude and frequency fluctuations of the master oscillator on the results of measurements of the amplitude and phase fluctuations of the transmitted RF device, they are attenuated by at least 20 dB determined by suppressing harmonic modulations.

In addition, in the inventive meter when using amplitude-phase, amplitude and frequency receivers of the correlation type, similar to those used in the known meters [1, 2, 3], it is also possible, as in the prototype, to separate the amplitude and phase fluctuations of the pass-through RF device from its own noise measuring equipment.

From the foregoing it follows that in the inventive meter due to the presence of a modulator, amplitude, frequency and amplitude-phase receivers with their connections and the total combination of the claimed features, the amplitude and phase fluctuations created by the RF pass-through device are separated from each other from the intrinsic noise of the measuring equipment (at application as an amplitude, frequency and amplitude-phase receivers of the correlation type) and, moreover, from the effects of amplitude and frequency fluctuations of the master oscillator.

At the same time, the reliability and sensitivity of the inventive meter according to the amplitude and phase fluctuations created by the RF pass-through device will be higher than that of the prototype meter [3] by at least 20 dB due to the corresponding attenuation in it (in the inventive meter) of the effects of amplitude and frequency fluctuations of the master oscillator on the measurement results, which is not in the prototype.

Thus, a solution to the technical problem is achieved.

The drawing shows a functional diagram of the inventive meter of fluctuations in the passage of high-frequency devices.

The inventive fluctuation meter in the through-pass RF devices contains: a master oscillator - 1, a modulator - 1, a power divider - 3; RF pass through device - 4, calibrator - 5; the amplitude-phase receiver of the correlation type is 6, the amplitude receiver of the correlation type is 7, the frequency receiver of the correlation type is 8, the subtracting cascade is 9 and the indicator is 10. The output of the master oscillator 1 through modulator 2 is connected to the input of the power divider 3, the outputs of which connected: the first through the RF pass-through device 4 and the calibrator 5, the first input and output of the amplitude-phase receiver 6 to the first input of the subtracting cascade 9, the second to the second input of the amplitude-phase receiver 6, the third through the amplitude receiver 7 to toromu entry subtractor stage 9, the fourth through frequency receiver 8 - the third input of the subtracter stage 9, the output of which is connected to the indicator.

The inventive meter of fluctuations in the through-pass RF devices is used as follows.

Initially, the amplitude receiver 7 and the frequency receiver 8 are turned on, the amplitude-phase receiver 6 is turned off.

In this case, the oscillation of the master oscillator 1 in V equal to

(^*) Здесь и далее чертой сверху помечена операция усреднения по времени.)

( ^*) Hereinafter, the bar on top marks the time averaging operation.)

where t is the time in seconds,

- среднее значение амплитуды колебания задающего генератора в В,

- the average value of the amplitude of oscillation of the master oscillator in,

α (t) - dimensionless fluctuations in the amplitude of the master oscillator,

и f(t₁) - средняя и флуктуационная составляющие частоты колебания задающего генератора в Гц,

and f (t ₁ ) is the average and fluctuation components of the oscillation frequency of the master oscillator in Hz,

t ₁ - integration variable, the dimension of which is determined by the integration limits,

through a modulator 2, which can set harmonic amplitude and frequency modulations into the u (t) oscillation, 30-40 dB higher than the real values of the amplitude and frequency fluctuations of the master oscillator, the input and the third output of the power divider 3 are fed to the input of the amplitude receiver 7, the output signal which in B, cleared of the receiver's own noise and equal

where K ₃ is the dimensionless transmission coefficient of the power divider 3 on the third output,

Kα is the dimensionless transmission coefficient of the amplitude receiver 7, is fed to the second input of the subtracting cascade 9.

At the same time, part of the oscillation of the master oscillator 1 from the fourth output of the power divider 3 is fed to the input of the frequency receiver 8, the output signal of which is B, cleaned from the receiver's own noise and equal

where K ₄ is the dimensionless transmission coefficient of the power divider 3 on the fourth output,

K _f - transmission coefficient of the frequency receiver in Hz ^-1 ,

fed to the third input of the subtracting cascade 9.

At the next stage, the amplitude-phase receiver 6 is turned on. In this case, a part of the oscillation of the master oscillator 1 from the first output of the power divider 3 is fed to the input of the RF pass-through device 4, the output oscillation of which in B is equal to

(^*)Использование в одной формуле выражений f(t) и f(t₁) с позиций математики оправдано, так как в конечном счете

, входящий в аргумент синуса, зависит только от t (т.е. от пределов интегрирования).)

( ^*) The use of the expressions f (t) and f (t ₁ ) in one formula from the standpoint of mathematics is justified, since ultimately

included in the sine argument depends only on t (i.e., on the limits of integration).)

- среднее значение в В амплитуды выходного колебания проходного ВЧ устройства,Where

- the average value in V of the amplitude of the output oscillation of the feed-through RF device,

α ₁ (t) —dimensionless amplitude fluctuations created by the feed-through RF device itself,

aα is the dimensionless transmission coefficient of the amplitude fluctuations of the master oscillator to the output of the RF through-passage device,

a _f is the conversion coefficient in Hz ^{-1 of the} frequency fluctuations of the master oscillator into the intermodulation component of the amplitude fluctuations correlated with them in the output oscillation of the transmitted RF device,

- средний фазовый сдвиг в рад выходного колебания проходного ВЧ устройства, отсчитываемый от фазы сигнала задающего генератора,

- the average phase shift in rad output oscillations of the through-pass RF device, counted from the phase of the signal of the master oscillator,

φ ₁ (t) - phase fluctuations in rad, created by the pass-through RF device itself;

bα is the conversion coefficient in the rad of amplitude fluctuations of the master oscillator into the intermodulation component of phase fluctuations correlated with them in the output oscillation of the transmitted RF device,

b _f is the conversion coefficient in rad / Hz of the frequency fluctuations of the master oscillator into the intermodulation component of the phase fluctuations correlated with them in the output oscillation of the through-pass RF device,

through a calibrator 5, which can set the measured levels of noise amplitude or phase modulation in this mode into the output oscillation of the feed-through RF device, it is fed to the first input of the amplitude-phase receiver 6, the second input of which is connected to the second output of the power divider 3.

1. In the measurement mode of the amplitude fluctuations created by the RF pass-through device, the amplitude-phase receiver of the correlation type 6 is adjusted in a known manner to isolate the amplitude fluctuations of the output oscillation of the RF pass-through device 4. The signal in V from the output of the amplitude-phase receiver 6 is proportional to the amplitude fluctuations output oscillation of the RF through-pass device 4, cleaned from the intrinsic noise of the receiver 6 and equal

where Kα ₁ is the dimensionless transmission coefficient of the amplitude-phase receiver 6 in the mode of separation of amplitude fluctuations,

fed to the first input of the subtracting cascade 9, in which the signals Vα (t) and V _f (t) coming to its second and third inputs from the outputs of the amplitude and frequency receivers 7 and 8 are subtracted from this signal.

The signal in V from the output of the subtracting stage 9, which is equal in the mode of measuring the amplitude fluctuations of the RF through-passage device

далее поступает в индикатор 10, показания которого в В² пропорциональны шумовой мощности сигнала Vα₁(t} и равны:

then it goes to indicator 10, the readings of which in В ^{2 are} proportional to the noise power of the signal Vα ₁ (t} and are equal to:

By adjusting the transmission coefficients K _a and K _{f of the} amplitude and frequency receivers 7 and 8 (such adjustment is always available in standard receivers) in such a way as to fulfill the conditions

where Kαα and K _fα are the optimal values of the transmission coefficients Kα and K _{f of the} amplitude and frequency receivers 7 and 8 in the mode of measuring the amplitude fluctuations of the through-pass RF device,

eliminate the influence of amplitude and frequency fluctuations of the master oscillator 1 on the readings of indicator 10, which in this case will be

The investigated dimensionless amplitude fluctuations created by the RF pass-through device 4 are determined by the relation

and are counted by the calibrator 5, which sets in this mode the noise amplitude modulation, the value of which is equal to the amplitude fluctuations under investigation, into the output oscillation of the through-pass RF device.

In fact, the last three equalities are approximate, since it is impossible to completely eliminate the influence of the amplitude and frequency fluctuations of the master oscillator on the result of measuring the amplitude fluctuations created by the RF pass-through device.

The setting of the inventive meter to maximize the attenuation of the effects of amplitude and frequency fluctuations of the master oscillator on the result of measurements of the amplitude fluctuations created by the RF pass-through device is as follows.

First, with the help of a modulator 2, harmonic amplitude and harmonic frequency modulations are introduced into the oscillation of the master oscillator 1, the values of which are 30-40 dB higher than the real values of the amplitude and frequency fluctuations of the master oscillator 1 and when the amplitude and frequency receivers 7 and 8 are turned off, at least 20-25 dB higher than the readings of indicator 10, corresponding to the supply of a signal V'α ₁ (t} proportional to the amplitude fluctuations of the output oscillation of the transmitted RF device 4.

Then, the amplitude and frequency receivers 7 and 8 are turned on sequentially and, by adjusting the transmission coefficients of the signals in the amplification paths of the amplitude receiver 7 (when amplitude modulation is turned on) and frequency receiver 8 (when frequency modulation is turned on), the indicator 10 decreases every time, at least 20 dB, in comparison with the cases when the amplitude and frequency receivers 7 and 8 were turned off.

Finally, after completing the specified settings, the modulator 2 is turned off and, using the calibrator 5, the value of the amplitude fluctuations created by the RF pass-through device 4, fixed by the indicator 10, is counted out. At the same time (taking into account the settings made), at least 20 dB attenuation, effects and amplitude, are guaranteed, and the frequency fluctuations of the master oscillator 1 to the result of measurements of the amplitude fluctuations created by the RF pass-through device, which is not in the prototype and in other known meters.

2. In the measurement mode of phase fluctuations created by the RF pass-through device, the amplitude-phase receiver (correlation type) 6 is adjusted in a known manner to isolate the phase fluctuations of the output oscillation of the RF pass-through device 4.

In this case, the signal in V from the output of the amplitude-phase receiver 6 is proportional to the phase fluctuations of the output oscillation of the through-pass RF device 4, cleared of the intrinsic noise of the receiver 6 and equal to

where Kφ ₁ is the transfer coefficient in rad ^{-1 of the} amplitude-phase receiver 6 in the mode of separation of phase fluctuations,

fed to the first input of the subtracting cascade 9, in which the signals Vα (t) and V _f (t), which are supplied to its second and third inputs from the outputs of the amplitude and frequency receivers 7 and 8, are subtracted from the signal V'φ ₁ (t).

The signal in V from the output of the subtracting stage 9, which is equal in the measurement mode of phase fluctuations of the through-pass RF device

далее поступает на индикатор 10, показания которого в В² пропорциональны шумовой мощности сигнала Vφ₁(t) и равны

then it goes to indicator 10, the readings of which in V ^{2 are} proportional to the noise power of the signal Vφ ₁ (t) and are equal to

By adjusting the transmission coefficients Kα and K _{f of the} amplitude and frequency receivers 7 and 8 in such a way as to fulfill the conditions

where Кαα and К _fα are the optimal values of the transmission coefficients Кα and К _{f of the} amplitude and frequency receivers 7 and 8 in the measurement mode of phase fluctuations of the RF pass-through device (different from the optimal values of these coefficients Кαα and К _fα selected earlier in the measurement mode of amplitude fluctuations of the RF pass-through devices)

eliminate the influence of amplitude and frequency fluctuations of the master oscillator on the readings of indicator 10, which in this case will be

The investigated phase fluctuations in rad ² , created by the pass-through RF device 4 itself, are determined by the relation

and are counted by the calibrator 5, which in this mode sets the noise phase modulation, the value of which is equal to the investigated phase fluctuations, into the output oscillation of the through-pass RF device.

In fact, the last three equalities are approximate, since it is impossible to completely eliminate the influence of the amplitude and frequency fluctuations of the master oscillator on the result of measuring the phase fluctuations created by the RF pass-through device.

The setting of the inventive meter to the maximum attenuation of the effects of amplitude and frequency fluctuations of the master oscillator on the result of measurements of phase fluctuations created by the through-pass RF device is as follows.

First, with the help of a modulator 2, harmonic amplitude and harmonic frequency modulations are introduced into the oscillation of the master oscillator 1, the values of which are 30-40 dB higher than the real values of the amplitude and frequency fluctuations of the master oscillator 1 and when the amplitude and frequency receivers 7 and 8 are turned off, at least 20-25 dB higher than the readings of indicator 10, corresponding to the supply of a signal V'φ ₁ (t) proportional to the phase fluctuations of the output oscillation of the transmitted RF device 4.

Then, the amplitude and frequency receivers 7 and 8 are turned on sequentially and, by adjusting the transmission coefficients of the signals in the amplification paths of the amplitude receiver 7 (when amplitude modulation is turned on) and frequency receiver 8 (when frequency modulation is turned on), the indicator 10 decreases every time, at least 20 dB, in comparison with the cases when the amplitude and frequency receivers 7 and 8 were turned off.

Finally, after completing the specified settings, the modulator 2 is turned off and, using the calibrator 5, the value of the phase fluctuations created by the RF pass-through device 4, fixed by the indicator 10, is counted out. At the same time (taking into account the settings made), at least 20 dB attenuation, effects and amplitude, are guaranteed, and frequency fluctuations of the master oscillator 1 to the result of measurements of phase fluctuations created by the RF pass-through device, which is not in the prototype and in other known meters.

The processes described above show that, in the inventive meter, with appropriate settings, the amplitude and phase fluctuations created by the RF pass-through device are separated from each other from the noise of the measuring equipment (when using correlation-type devices similar to those used as amplitude-phase, amplitude, and frequency receivers in known meters) and, moreover, from the influence of amplitude and frequency fluctuations of the master oscillator, which is not in the prototype and in other known meters.

Therefore, the reliability and sensitivity of the inventive meter according to the amplitude and phase fluctuations created by RF pass-through devices such as amplifiers, power limiters, phase shifters, arresters, and others, will be, when the above conditions and settings are met, at least 20 dB higher than the traditional solution -prototype, due to the corresponding attenuation of the effects of amplitude and frequency fluctuations of the master oscillator on the results of measurements of amplitude and phase fluctuations created by the RF pass-through device , which is not in the prototype and in other known meters.

Sources of Publication

1. RF patent No. 2088944, G 01 R 23/6, publ. 07/28/1997.

2. A.S. USSR No. 652502, G 01 R 23/6, publ. 03/15/1979.

3. A.S. USSR No. 515999, G 01 R 23/6, publ. 10/27/1972.

Claims (1)

A fluctuation meter in high-frequency devices through passage, comprising a master oscillator, a power divider, a high-frequency device through passage, a calibrator, an amplitude-phase receiver and an indicator, the first output of the power divider through a high-frequency device through passage and a calibrator connected to the first input of the amplitude-phase receiver, the second input of which connected to the second output of the power divider, characterized in that it additionally introduced a modulator, an amplitude receiver, a frequency receiver and subtract cascade, while the output of the master oscillator through the modulator is connected to the input of the power divider, and the inputs of the subtracting cascade are connected: the first to the output of the amplitude-phase receiver, the second through the amplitude receiver to the third output of the power divider, the third through the frequency receiver to the fourth output power divider, and the output of the subtracting cascade is connected to the indicator.