SU1532888A1 - Arrangement for measuring amplitude-phase distribution of field across aerial aperture - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to improve the accuracy of measuring the amplitude-phase distribution of the field in the aperture of the antenna. The device contains a measuring probe 1, waveguide hinged connections 2,3 and 4, segments 5 and 6 of waveguides, r-7, amplifazometr 8 and the antenna under study 9. The phase error occurring in section 6 during its movement is equal to the running error occurring in 5. Therefore, the phase error is subtracted from the phase difference of the signals from the measuring and reference inputs of the amplifier 8 and the amplitude change equalized by the movement of the probe 1 is equalized. The goal is achieved by reducing the phase errors. 2 Il.

Description

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The invention relates to radio engineering, in particular to the field of antenna measurements of the microwave range, and may find application in radar, navigation and communication technology.

The aim of the invention is to improve the measurement accuracy by reducing phase errors.

FIG. 1 shows a structural electrical circuit diagram of a device for measuring the amplitude-phase distribution of a field in the aperture of an antenna; in fig. 2 shows one of the possible structures for making a swivel in the form of a power divider.

A device for measuring the amplitude-phase distribution in the aperture of the antenna contains a measuring probe 1, first-third volvodavodnye hinged connections 2-4, the first, second segments of the waveguides 5,6, generator 7, amplification indicator 8, a device for measuring the amplitude-phase distribution The open antenna works as follows.

When measuring the amplitude-phase distribution, the field emitting the measuring probe 1 moves along the aperture of the antenna 9 under investigation, the signal from the input of which contains information about the amplitude-phase distribution of the field as a function of the coordinates of the measuring probe 1, goes to the measuring input of the amplifier. 8. A signal coinciding in amplitude and phase with the signal applied to the measuring probe 1 is fed to the reference input of the ampstage meter 8. The phase error occurring in the second segment 6 of the waveguide during its movement is equal to the running error,

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arising in the first segment of the 5 waveguide. Therefore, in the phase difference of the signals from the measuring and reference inputs of the amplifier 8, the phase error is subtracted and the amplitude change equalized by the movement of the probe 1 is equalized. As a result, the amplitude-phase distribution of the field in the opening of the measured antenna has a higher accuracy, since it is identical shoulders of the waveguide line made with a tolerance of up to 0.02 mm provides an uncompensated phase difference when the probe is moved less than 0.24

Claims (1)

Invention Formula A device for measuring the amplitude-phase distribution of the field in the aperture of the antenna, including a generator, a serially connected measuring probe, a first waveguide joint, a first waveguide section, a second waveguide connection, a second waveguide connection forming a pantograph, an amplification meter whose measurement input is an input for connecting the antenna under investigation, characterized in that, in order to increase accuracy by reducing phase errors OK, the first and second waveguide sections are made of the same electrical length, the second waveguide hinge is made in the form of a power divider, the input of which is rigidly connected to the generator output, and the output of the third waveguide hinge connection is connected to the reference input of the amplifier. From the generator u To probe measuring 2. Output to the amplitude-A l Zometer (reference Signal)