Ka-waveband satellite communication radome

Abstract

The invention discloses a Ka-waveband satellite communication radome. The invention relates to the field of satellite communication. The Ka-waveband satellite communication radome comprises dielectriclayers, a metal screen and a filling layer, the dielectric layers comprise a first dielectric layer and a second dielectric layer which are identical, the metal screen is of a periodic unit structureand comprises a first metal screen and a second metal screen which are identical, and the first dielectric layer, the first metal screen, the filling layer, the second metal screen and the second dielectric layer are sequentially cascaded. The radome is composed of the frequency selective surface and has the advantages of being stable in incident angle, insensitive to polarization, dual in passband, large in passband range, small in loss within the passband range and the like. Different shapes can be designed according to the requirements of different application scenes. The radome structurehas good transmission characteristic stability, can protect a radar and a communication system, and has good electromagnetic wave transmission performance.

Description

technical field [0001] The invention relates to the field of satellite communication, in particular to a Ka-band satellite communication radome. Background technique [0002] With the development of satellite communication technology and the change of people's demand for satellite communication, satellite communication is gradually developing in the direction of high capacity, low delay, and large bandwidth. At the same time, the frequency of satellite communication is changing from L, C, K, etc. The band is upgraded to the Ka band, and the Ka band satellite communication has a larger bandwidth, which can better meet the needs of current multimedia transmission services. At present, countries such as the United States, Japan, France and other countries in the world have increased investment in satellite communication research, and my country's Ka-band communication satellites will soon be officially commercialized. [0003] Frequency selective surface (FSS) is a special mat...

AI Technical Summary

Problems solved by technology

[0004] Due to the inherent microwave properties of the wave-transparent material layer, the traditional dielectric radome has the following disadvantages, and it is difficult to meet the special needs of different scenarios in the millimeter wave band

[0005] Narrow passband: the passband range of traditional dielectric radome loss less than 0.5dB will gradually narrow with the increase of frequency, while the absolute bandwidth of Ka-band is 3GHz, it is difficult for general dielectric radome to meet the bandwidth requirements

[0006] Sensitive to polarization, incident angle, and dielectric layer thickness: As the frequency increases, the influence of the dielectric constant of the medium and the size of the loss angle on the transmission curve will also increase. The transmission characteristics of traditional dielectric radomes in the Ka band vary with the incidence angle The change is very fast. Under different polarizations and different dielectric thicknesses, the energy loss of the same incident wave passing through the dielectric radome will be very different. Therefore, the application scenario of the dielectric radome in the Ka band is very single, and it is difficult to meet different performances at the same time. requirements

[0007] Therefore, in view of the fact that it is difficult for traditional radome to meet the requirements of millimeter-wave band scenarios, those skilled in the art need to start from the structure and materials of the radome, and devote themselves to developing a radome whose transmission characteristics do not change rapidly and drastically with the above-mentioned conditions.

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