SU915022A1 - Automatic ultra-high frequency meter - Google Patents

Description

The invention relates to a radiation measuring technique.

Known automatic meter microwave, containing two circuits of series-connected mixer, phase detector and tunable generator, the output of which is connected to the heterodyne input of the mixer, as well as a low-frequency mixer connected between the second outputs of tunable generators, while the inputs of the mixers are the inputs of the investigated microwave signal, and the second inputs of the phase detectors are connected to the output of the reference signal of the electron-counting frequency meter [*.].

However, the known automatic meter of ultra-high frequencies does not provide a direct reading of the measured frequencies on the indicator of the electronic-estimated frequency meter.

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The purpose of the invention is to obtain a direct reading of the measured hours on the indicator of the electron-counting frequency meter.

This goal is achieved by the fact that the automatic microwave meter, containing two circuits of a series-connected mixer, phase detector and tunable generator, the output of which is connected to the heterodyne input of the mixer, as well as a low-frequency mixer connected between the second outputs of tunable generators, while the inputs of the mixers are the inputs of the investigated microwave signal, and the second input of one of the phase detectors is connected to the output of the reference signal electronically etnogo the frequency between a low-frequency output of the mixer and the electron-counting input counting frequency meter administered sequentially formirovz3

915022

The pulse pulse and the switch, the second inputs of which are connected respectively to the third outputs of tunable generators, and the second output of the pulse driver is connected to the input of the time counting base of the electronically counting frequency meter, the output of the reference signal of which is connected to the reference input of another phase detector.

The drawing shows the structural scheme of the automatic measuring device of ultra-high frequencies.

Automatic microwave meter contains two circuits 1 and 2 of the series-connected mixer 3 "phase detector 4 and tunable generator 5" whose output is connected to the heterodyne input of mixer 3, as well as a low-frequency mixer 6 connected between the second outputs of tunable oscillators 5, electron-counting frequency meter 7 and connected between the output of the low-frequency mixer 6 and the counting input of the electron-counting frequency meter 7 serially connected shaper 8 pulses and switch 9 "sec The second inputs of which are connected respectively to the third outputs of tunable oscillators 5 "and the second output of the pulse shaper 8 is connected to the input of the time counting base of the electronic counter frequency meter 7> while the inputs of the mixers 3 are the inputs of the microwave signal under study, and the second input of one of the phase detectors 4 is connected to the output reference signal electron counter frequency meter 7 ·

Automatic meter microwave works as follows.

The measured signal with frequency ί simultaneously arrives at the inputs of mixers 3 · The heterodyne inputs of mixers 3 of circuits 1 and 2 receive voltages of frequencies ί {"and ί ^ from corresponding tunable oscillators 5 · Voltage of difference frequency - ηί}" from the output of mixer 3 of circuits 1 arrives at the phase detector 4, the second input of which receives the reference frequency voltage ί $ taken from the electron-counting frequency meter 7 · The control voltage from the phase detector 4 of the circuit 1 is fed to the tunable generator 5

and adjusts its frequency to 10

chenii "

ί - ίο

(or ί = ηίг + ίφ),

where η is the harmonic number ίρ .. Similarly, circuit 2 also works with the only difference that, if the capture in circuit 1 occurs only with πίρ <ί, then in circuit 2 the capture occurs only with πίρ? ί, i.e.

_£ н _ί + ίφ,,, "

ίρ - -ρ-- ( ^OR = Πίρ - ίφ).

With such work circuits 1 and 2 phase

frequency controllers Gg + ίί

15

20

25

ίφ. Frequencies are tunable

shh

g g

These generators 5 are mixed in a low-frequency mixer 6, and the difference frequency signal ίρ - ίρ from the output of the low-frequency mixer 6 is fed to the input of the pulse shaper 8. In the driver 8, a control signal is generated by the switch 9 and the time base signal счета of the electron-counting frequency meter 7, *

ABOUT

Control signal 'commun30

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With a tator y, it provides, alternating with frequency ί ”- ί,!, the connection of tunable generators 5 circuits 1 and 2 to the counting input of an electron-countable frequency meter 7.

Thus, due to switching with the frequency ίρ - ίρ, the counting input of the electron-counting frequency meter 7 always receives a signal of the frequency ί {1 + ί}. _P

τς _ -. Since the value

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45

50

reference frequency ί ₀ for phase detectors 4 is chosen to be 10 ^x , where '

K is an integer, then the number of pulses Ν, counted by the counter of the electron-counting frequency meter 7 ", is N = Mc = ^τ · θ · = Ν10 ^κ .

The automatic meter of ultra-high frequencies in comparison with the known one provides a direct reading of the measured frequencies on the indicator of the electron-counting frequency meter 7.

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Claims (1)

Claim Automatic microwave meter, containing two circuits from a series-connected mixer, phase detector and tunable generator, the output of which is 5 915022 6 connected to the heterodyne input of the mixer, as well as a low-frequency mixer connected between the second outputs of tunable generators, while the inputs of the mixers are the inputs of the microwave signal under study, and the second input of one of the phase detectors connected to the output of the reference signal of the electron-counting frequency meter, characterized by , in order to obtain a direct reference of the measured frequencies on the indicator of the electron-counting frequency meter, between the output of the low-frequency mixer and the counting input of the electronic - a counting frequency meter is entered in series with a pulse shaper and a switch, the second inputs of which are connected respectively to the third outputs of tunable generators, and the second output of the pulse shaper is connected to the input of the time counting base of the electron-counting frequency meter, the output of the reference Its signal is connected to the reference input of another phase detector.