A.S. Petrov1, V.A. Chikov2

1,2 JSC «NPO Lavochkina» (Moscow Region, Russia)

The article reveals the practical features and describes in detail some details of the procedure that may complicate the implementation of the algorithm for the synthesis of AP of large linear and planar antenna arrays performed using the iterative FFT method, as well as examples of its application. The content of the algorithm of this method, the step-by-step procedure for forming the target AP template and the features of performing the iterative procedure for synthesizing the amplitude-phase excitation of emitters are described in detail. The results of the synthesis of the DN of a linear array with 64 emitters, performed on an office computer at 500  iterations in 2,5 s. The total level of the side lobes is limited to –30 dB, and in four additionally specified angular regions, the level is  –60 dB. A planar lattice with the number of elements 64×64=4096 is also synthesized. When performing 100 iterations for a time of 110 s, it was possible to lower the overall level of the side lobes to –40 dB and in four additional areas to –55 dB. The results of the application of the combined method for the synthesis of the AP of a planar lattice separately along two orthogonal axes using the iterative FFT algorithm for the synthesis of a linear lattice are presented.

The algorithm developed on the basis of the iterative FFT method and the corresponding software module allow not only to synthesize the AP of the antenna array with a given general level of side lobes, but also to form deeper dips of the AP in pre-prescribed angular directions. The main advantage of the method is the possibility of synthesizing radiation patterns of antenna arrays with thousands of emitters on typical personal computers in a time not exceeding 3…5 min.

Petrov A.S., Chikov V.A. Linear and planar antenna arrays synthesis realization using the iterative fast Fourier transform method.

Achievements of modern radioelectronics. 2021. V. 75. № 12. P. 32–41. DOI: https://doi.org/10.18127/j20700784-202112-03 [in Russian]

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