А.Yu. Grinev1, А.V. Podbereznyy2

1,2 Moscow Aviation Institute (National Research University) (Moscow, Russia)

The article summarizes information published in foreign and domestic literature on possible ways to build flat antenna systems with wide-angle scanning from -75 to +75 degrees by combining metasurfaces. The classification of methods is carried out and the most promising solutions for each of the methods are given.

The methods are divided into three groups. The first group is an extension of the radiation pattern of a single emitter, since the radiation pattern antenna array is the result of multiplying the radiation patterns of a single element and the multiplier of a flat lattice. The first solution is implemented by using a metasurface. The metasurface is a periodic structure of metal patches, with a long patch length of l<<λ0.

The second solution is implemented by using the conclusions of the mirror source theory. According to the conclusion from the theory of a mirror source, the maximum width of the radiation pattern is realized only by two combinations of 8 – JpM (J is parallel to the magnetic wall) and MpE (M is parallel to the electric wall).

The second group is the reconfiguration of the radiation pattern of a single emitter. Unlike the first group, the radiation pattern of a single element is not directed in the direction of 0 degrees, but changes the direction of the main lobe during scanning. A case of using a metasurface is presented. The metasurface is a periodic structure with metal patches, only unlike the first group, a switch is installed between the metal patches. By searching for the optimal configuration, the inclination of the radiation pattern to the desired scanning direction is achieved. The multimode excitation method is also considered in this group. Since the radiation pattern of each mode has its own characteristics, by choosing the right mode, you can get the desired slope of the radiation pattern of a single emitter.

The third group is to improve the alignment of the elements of the antenna array. Improved matching is achieved by using a metasurface with a negative permittivity parameter, which leads to attenuation of the parasitic surface wave during scanning. A solution for using compensating decoupling networks is also presented.

Grinev А.Yu., Podbereznyy А.V. Methods and technical solutions for the design of wide-angle scanning planar antenna systems. Achievements of modern radioelectronics. 2023. V. 77. № 2. P. 58–76. DOI: https://doi.org/10.18127/j20700784-202302-05 [in Russian]

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