SU581438A1 - Automatic radiosignal pulse power meter - Google Patents

Description

one

The invention relates to devices for measuring electrical quantities and can be used in the development of RF and microwave pulse power meters, in systems of automatic control and regulation of the pulse power of radio signals.

A digital microwave microwave pulse voltmeter is known, containing a series-connected ms divider, a detector sensor, an amplifier, a ruler, a comparison device, and a thermal power sensor t1.

Such a meter has an increased overall measurement error due to the fact that the characteristics of the thermal power sensor cannot be obtained identical under the conditions of a change in input signal levels, ambient temperature, and pulse shape.

The aim of the invention is to improve the measurement accuracy.

This is achieved by the fact that an automatic pulse power meter of radio signals, containing a series-connected power divider, a detector sensor, an amplifier, and a comparison device with a controller, connected to the amplifier, and also a thermal power sensor connected to

a power converter, a control unit, is additionally equipped with an input switch, a switch, a memory unit and an amplitude / video pulse meter; one of the outputs of the power splitter is connected to the first input of the input switch, the second input of which, combined with the input of the amplitude meter of video pulses, is connected to the output of the amplifier , the output of the input switch is connected to the input of the thermal power sensor, the output of the power converter through the switch is connected to the memory unit, the control inputs of the input circuit the switch, the switch and the storage unit are connected to the control unit, the outputs of the switch and the storage unit are connected to the first and second inputs of the comparator, respectively.

The drawing shows the structural scheme of the proposed meter.

Claims (2)

The automatic radio pulse power meter has an input switch 1, a thermal power sensor 2, a power converter 3, a switch 4, a memory block 5, a power divider 6, a video pulse amplitude meter 7, a control block 8, a comparison device 9, a detection sensor 10, an amplifier 11 and ruler 1 2. The proposed meter works as follows. Measured radioig: pulses through the power divider 6 and the input switch 1 are fed to a thermal power sensor 2 (made, for example, in the form of a coaxial thermoelectric sensor with indirect heating), the resistance of which (or its heater) must be known and not during operation of the meter. From the output of said sensor, the information about the average power of radio pulses is converted in the power converter 3 into a convenient type of signal, which through the switch 4 goes to the memory block 5, the output of which is connected to one of the inputs of the comparison device 9. After converting and storing the information about the average power of the measured radio pulses, the control unit 8 switches the input of the input switch 1 and the output of the switch 4, and also sends a command for storing to the memory block. In this case, part of the power of the measured radio pulses through the second output of the power divider 6 is fed to a detector sensor, which converts radio pulses into an envelope. The radio pulse envelope is amplified by the amplifier 11, made controlled by the gain, and fed through the input switch 1 to the thermal sensor 2, the design of which must ensure full isolation of the video pulses from the output signal of the sensor 2 carrying information from the average power of the sequence of incoming video pulses. . This information is converted in the power converter 3 and through the switch 4 is fed to the second input of the comparator 9, which generates an error signal with a magnitude and sign proportional to the degree of deviation of the average power information of the measured radio pulses and information about the average power of the video pulse sequence with parameters identical to accuracy envelope selection, i.e., parameters of measured radio pulses (form, duration / repetition period). The error signal through element 12 controls the gain of element 11 so that after adjusting the average power of the radio pulses becomes equal to the average power of the video pulses. In this case, the amplitude of video pulses is measured in the meter 7 of the amplitude of video pulses and the pulsed power Pjf is indicated (on a square scale) in accordance with the formula PX K - where K is the coefficient taking into account the loss of the divider, input switch 1 and the thermal sensor 2) - amplitude of video pulses, noticing the measured pulse power; Rg is the active resistance of the thermal power sensor 2 (or its heater). The proposed meter has an increased measurement accuracy with complex modulation of radio pulses (for example, shape, duration) and with an extended dynamic range, since it does not require the linearity of the output parameter of the power converter from the input power. At the same time, there is no high accuracy requirement for the secondary power converter, since it works as an indicator of average power and requires only stability during the measurement time. The invention includes an automatic pulse power meter for radio signals containing a series-connected power divider, a detector sensor, an amplifier and a comparison device with a controller connected to the amplifier, as well as a thermal power sensor connected to the power converter, a control unit that increase measurement accuracy; it is additionally equipped with an input switch, a switch, a memory unit and an amplitude meter for video pulses, one of the outputs The power body is connected to the per input of the input switch, the second input of which, combined with the input of the video pulse amplitude meter, is connected to the output of the amplifier, the output of the input switch is connected to the input of the thermal power sensor, the output of the power converter is connected to the memory unit through a switch The input inputs of the input switch, the switch and the PS1 unit are connected to the control unit, the outputs of the switch and the memory unit are connected to the first and second inputs of the comparator, respectively. Sources of information taken into account in the examination: 1. Exchange of experience in the radio industry. Tennessee, 1974, I 10, p.32.