SU1176267A1 - Apparatus for automatic measurement and recording of phase distribution of antenna electromagnetic field - Google Patents

Abstract

DEVICE FOR AUTOMATIC MEASUREMENT AND RECORDING OF PHASE ELECTROMAGNETIC FIELD DISTRIBUTION OF ANTENNA, containing a microwave signal generator connected to an input shoulder of a power divider, one of the output shoulders of which is an input for connecting the antenna under study, and another device has a re-designed card that has a cover that has been inserted. connected to the coordinate sensor, the output of which is connected to the first input of the phase registration unit, the output of the first el is connected to the second input of the phase registration unit an electronic switch, between the output of a tunable calibrated phase shifter and the output of the first electronic switch, a synchronous detector, a maximum detector, a time interval meter and a time converter are sequentially connected — the control input of the tunable calibrated phase shifter is connected to the output of the coordinate sensor via a control voltage generator, the second input of the synchronous detector is connected to the measuring probe, the second input of the time interval meter is connected to the input of the coordinator sensor t, and the control input of the first electronic switch is connected to the output of the maximum detector, characterized in that, in order to extend the functionality by measuring the amplitude distribution (L of the electromagnetic field of the antenna, the device is connected in series with a sample and memory unit, a voltage converter — a code and the second electronic key, as well as the amplitude registration unit, with the output of the synchronous detector of the connection. is connected to the output of the maximum detector, the second control input of the sampling and storage unit and the first input of the amplitude detection unit are connected to the output of the coordinate sensor.

Description

1 The invention relates to the technique of antenna measurements and can be used when measuring the amplitude-phase distribution in the aperture of the antenna. The purpose of the invention is to enhance the functionality by measuring the amplitude distribution of the electromagnetic field of the antenna. The drawing shows the structural electrical circuit of the device for automatically measuring and recording the phase distribution of the electromagnetic field of the antenna. The device for automatic measurement and recording of the phase distribution of the electromagnetic field of the antennas includes a microwave signal generator 1, a power divider 2, the antenna under investigation 3, a tunable calibrated phase shifter 4, a measuring anode 5, a sensor 6 of coordinates, a phase detection unit 7, a synchronous detector 8 , maximum detector 9, time interval detector 10, time converter 11 - code, first electronic switch 12, control voltage generator 13, sampling and memorization unit 14, voltage converter 15 - code, second electro key 16, the amplitude recording unit 17. A device for automatically measuring and detecting the phase distribution of the electromagnetic field of the antenna operates as follows. The signal from the generator 1 The microwave signal is fed to the divider 2, which has two outputs. From one output of the divider 2, the signal is fed to the antenna under study 3, from the other output comes through a tunable calibrated phase shifter 4 to a synchronous detector 8. The tunable calibrated phase shifter 4 is tuned to 27 rad due to the voltage generated by the control voltage generator 13, providing a linear change phases. It is triggered by a command generated by the sensor 6 for moving the coordinates of the measuring probe 5. The electromagnetic energy radiated by the antenna 3 under study is received by the measuring probe 5. The signal received by the measuring probe 5 is fed to the synchronous detector 7.2 The signal at the output of the synchronous detector 8 It looks like: and 005 (4 - Vg), where k is the proportionality coefficient; - the amplitude of the reference signal coming from the power divider 2 through a tunable calibrated Phaser 4; the amplitude of the signal under study coming from the measuring probe 5; %), - phase of the reference signal; Vg is the phase of the signal under study; The signal reaches its maximum value at f fg. When measuring the phase signal from the output of the synchronous detector. 8 with a frequency of 2J7 L0 -, where T - time adjustment TV; a calibrated phase shifter 4, using a control voltage generator 13 in the range from 0 to 2F, is fed to the input of detector 9 of a maximum, which generates a pulse at the moment when the signal reaches its maximum value, i.e. at the moment when. The sensor 6 of the coordinates of the position of the measuring probe 5, associated with the first input of the phase registration unit, generates a measurement start command, which starts the generator 13, providing a linear change in the phase of the tunable calibrated phase shifter 4, and enters the Start of the time interval meter 10. The pulse from the maximum detector 9 is fed to the Stop input of the time interval meter 10, and also opens the first electronic key 12 to skip coded information about the value of the measured time interval from the time converter 11 code to the phase registration unit 7. The magnitude of the time interval between start-up times and the signal reaching its maximum value, with a known dependence of the voltage at the output of the control voltage generator 13 on the time and phase at the output of the tunable calibrated phase shifter 4, on the magnitude of the applied voltage is uniquely related to the magnitude of the phase shift.

Claims (1)

USSR copyright certificate No. 1070492, cl. G 01 R 29/10, 1981. 'DEVICE FOR AUTOMATIC MEASUREMENT AND RECORDING OF PHASE DISTRIBUTION OF AN ELECTROMAGNETIC FIELD OF ANTENNA, containing a microwave signal generator connected to the input arm of the power divider, one of the output arms of which is an input for connecting the antenna under study, and to the other a tunable calibrated phase shifter is connected, as well as a measuring probe connected to a coordinate sensor, the output of which is connected to the first input of the phase registration unit, the output of the first is connected to the second input of the phase registration unit o electronic key, between the output of the tunable calibrated phase shifter and the output of the first electronic key, a synchronous detector, a maximum detector, are sequentially connected .. time interval meter and time converter - code, the control input of a tunable calibrated phase shifter is connected to the output of the coordinate sensor via a control voltage generator, the second input of the synchronous detector is connected to the measuring probe, the second input of the time interval meter is connected to the coordinate sensor input, and the control input of the first electronic key connected to the output of the maximum detector, characterized in that, in order to expand functionality by measuring the amplitude distribution To determine the electromagnetic field of the antenna, a sampling and storing unit, a voltage-code converter and a second electronic key, and an amplitude recording unit are introduced in series with the output of the synchronous detector connected to the input of the sampling and storing unit, whose control input and control the input of the second electronic key is connected to the output of the maximum detector, the second control input of the sampling and storing unit and the first input of the amplitude recording unit are connected to the output of the sensor and coordinates.