SU930444A1 - Device for simulating aerial beams - Google Patents

Description

one

The invention relates to radio engineering and can be used to study the propagation processes of radio waves, in particular, antenna patterns.

A device for simulating antenna radiation patterns, comprising successively located coherent radiation sources, a first beam-splitting translucent mirror, a collimating lens system, a phototransparent, a transforming lens, a scanning pinhole and a second beam-splitting translucent mirror, as well as a photoreceiver optically associated with a second mirror, and a second beam-splitting semi-transparent mirror, as well as a photoreceiver optically associated with the second waveform, and a second beam-splitting semi-transparent mirror, as well as a photoreceiver optically associated with the second waveform, and a second beam-splitting semi-transparent mirror, as well as a photoreceiver optically associated with the second waveform, and a second beam-splitting semi-transparent mirror, as well as a photoreceiver optically associated with the second waveform, and a second beam-splitting semi-transparent mirror, as well as a photoreceiver optically associated with the second, a second optical mirror, and a second beam-splitting semi-transparent mirror, as well as a photoreceiver optically associated with the second, are known. , and a voltage meter, a phase meter, an intermediate frequency generator, and an ultrasonic light modulator a, while the output of the photodetector is connected to the input of the voltage meter and one of the inputs of the phase meter, one of the outputs of the intermediate frequency generator is connected to the other input of the phase meter, and the other to the input of the ultrasonic light modulator associated with the first and second

Translucent mirrors 1.

However, the known device does not allow the modeling of antenna patterns in the —signal x when the radio signal transmitted by the antenna passes through the hydrometeor zone (rain or fog band).

The purpose of the invention is to enable the modeling of radiation patterns taking into account the influence of hydrometeors.

ten

This goal is achieved by the fact that a block of adjustable and switched nozzles is installed between the phototransparant and the converted lens in the device for modeling antenna patterns.

15 for spraying 1 microparticles, with the opening of the nozzles MAP | 1-1-1 inserted into the optical field of the phototransparant.

In the drawing there is a structural electrical circuit offering; e 10 | -o device.

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The device contains a source of coherent radiation, a collimating lens system 2, foyugransparant 3, b.yuch 4 adjustable and switched ({particle for spraying microparticles, a transforming lens 5, a scanning pinhole 6 / photodetector 7, two mirrors 8, an intermediate frequency generator, ultrasonic light modulator 10, first and second beam-splitting translucent mirror 1 and 12, voltage meter 13 and phase meter 14.

The device works as follows.

The collimating system of lenses 2, the light created by source 1, the light beam, forms an optical field with a flat front. Phototransparent 3 forms an optical field identical to the simulated radio field. The nozzles of unit 4 are sprayed in the optical field of a micropill that scatter part of the optical radiation and distort the antenna pattern. The conversion lens 5 serves to approximate the Fraunhofer zone to the phototransparant 3 and reduce, thereby, the size of the plant for modeling.

Scanning pinhole 6 provides the registration (microphotometry) of the optical field, the photo-prism 7 converts the optical field into an electrical signal. The photocathode of the photodetector 7 simultaneously with the light signal received from the output of the main channel through the scanning pinhole 6 also receives a signal from the output of the reference signal from the second mirror 8, representing a constant intensity light, the frequency of which is modulated by the signal of the 9H generator and the photodiode heterodyne of the light carrier and at the output of the photodetector 7, a signal of the difference frequency of the light of the main and reference channels appears. The amplitude of this signal is proportional to the level of the radiation pattern at the measuring point and is recorded by the meter 13. The intermediate-frequency electric signal phase is equal to the light field phase at the measuring point and recorded by the phase meter 14. The beam-splitting semi-transparent mirrors 11 and 12 perform the function of dividing the light emitted by source 1 to supply its inputs to the main and reference

channels and mixing light from the output of two channels.

Thus, the device allows simulating hydrometeors with different droplet sizes and water content, droplet deposition rate, as well as with different configuration and length of the hydrometeor cloud.

Claims (1)

Invention Formula An apparatus for simulating antenna patterns, comprising in sequence the source of coherent radiation, the first beam splitter semitransparent mirror, a collimating lens system, photographic transparency transforming lens, the scanning micro-hole and the second beam splitter semitransparent mirror, and a photodetector optically coupled to the second beam splitter semitransparent mirror, and a voltage meter, a phase meter, an intermediate frequency generator and an ultrasonic light modulator, while the output of the photodetector is connected to the input of the voltage meter and to one of the inputs of the phase meter, one of the outputs of the intermediate frequency generator is connected to another input of the phase meter, and the other to the input of the ultrasonic light modulator, the other input of which and the output are mirrored respectively with the help of mirrors the first and second semi-transparent beam-splitting mirrors, characterized in that, in order to enable the modeling of radiation patterns, taking into account the influence of hydrometeors, between the phototransparent and transducer A lens mounted a block of adjustable and switched microparticles for spraying microparticles, the nozzle opening being directed into the optical field of the phototransfer. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 425135, cl. G 01 R 29/00, 1974 (prototype). Ss J NX ““ B four V five ts |. i, .