SU363926A1 - UIBLIE'EKA - Google Patents

Description

one

The invention relates to the field of radio engineering and can serve, in particular, for measuring the power of high-frequency signal sources in continuous generation and pulse modulation modes.

The known devices for measuring the power of a microwave signal, containing a load resistance matched with a source of measured power, a communication probe and a measuring path consisting of a detector section, a niche voltmeter, a DC amplifier and an indicator device, have poor measurement accuracy.

In order to improve the measurement accuracy in the proposed device, the communication probe is located in the zone bounded by the conductive surface of the matched coincidence.

The drawing shows a diagram of the proposed device.

A load resistor 1, for example, a tubular type of a CNI, is enclosed in a matching screen 2. Probe 3 is a communication, formed as a coius with an aspect ratio of 3: 1, located in zone 4, limited by the conductive surface of the load resistor /, and fixed movable along its own axis (for the purpose of adjustment) in the dielectric body 5. The probe 3 is made of brass, followed by silvering. The axis of the probe 3 connection, passage and .I.a through

the apex of the cone and the middle of its base coincides with the line 6 of the maximum intensity of the high frequency field in zone 4.

The measuring path 7, consisting of the detector section 8, the peak voltmeter 9, the amplifier 10 of the direct current and the indicator device 11, is connected via coaxial line 12 to the probe 3 of the communication.

When the device is connected to a source of high-frequency oscillations in zone 4, an electromagnetic field arises due to the dissipation of the source power at the load resistor.

The magnitude of the electromagnetic field in zone 4 is proportional to the amount of power released by this resistor, and allows you to judge the amount of power emitted by the source of high-frequency oscillations.

Electromagnetic zone 4 excites high-frequency oscillations in the probe 3 communication, which through the coaxial line 12 enters the input of the measuring path 7. The signal of the high-frequency oscillations, the passage through the detector section 8, the peak voltmeter 9, the amplifier 10 DC, converted by known methods to form convenient for reading and fed to the input of the indicator device 11.

Shape and drop of basic dimensions

3

The probe 3 of the communication is experimentally selected by the tataki, which provides the necessary energy transfer coefficient from zone 4 to measuring path 7 with the minimum bypassing of the load resistor 1.

With an increase in the ratio of the height of the cone to the diameter of its base, the effective surface of the communication probe 3 increases and the amplitude of the high-frequency signal induced in it increases. At the same time, the shunting effect of the communication probe 3 and the measuring path 7 connected to it on the load resistor / increases, which leads to an additional measurement error.

A decrease in the ratio of the height of the cone to the diameter of its base reduces the effective surface of the probe 3 of the communication and allows

practically exclude shunting, but at the same time the magnitude of the high-frequency signal induced in the probe 3 of the communication becomes insufficient for normal operation of the measuring path 7.

 1 p I d m with t and 11 about b and e and

A device for measuring the frequency, frequency of the microwave signal, containing its load resistance matched to the source of measured power, a communication probe and a measuring path consisting of a detector section, a voltmeter, a DC amplifier, and an indicator device characterized by that, in order to improve the measurement accuracy, the communication probe is placed in the zone bounded by the conductive surface of the matched resistance.

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