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Multi-channel synthetic aperture transmitting and receiving antennas

Keywords:

A.V. Ivankin – Ph. D. (Eng.), Senior Lecturer, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
E-mail: alex3707@mail.ru
N.S. Korda – Junior Research Scientist, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
E-mail: urtica84@mail.ru
V.A. Ponkin – Honored Scientist of RF, Dr. Sc. (Eng.), Professor, Main Research Scientist, MESC «Zhukovsky–Gagarin Air Force Academy» (Voronezh)
E-mail: ponkvikarch@mail.ru


Multi-channel synthetic aperture transmitting and receiving antennas.
The models and algorithms for processing multichannel coherent (in space, time and frequency) signals, providing the aperture syn-thesizing the transmitting and receiving antennas.
The algorithms are based on the methods of the theory of optimum detection of orthogonal vector signal.
It is shown that under the conditions of a linear process of multi-channel sensing and the use of multi-channel (in space, frequency, time) quasi-harmonic signals (which are eigenfunctions of linear systems), synthetic aperture algorithm can be implemented by computational methods by digital processing parameters measurement results of radiated and received signals.
From a physical point of view, the algorithm implements the so-called method of «frozen waves», in which the amplitude and phase of the registration signal corresponds to the «freezing» of the waves, and the multiplication in the processing of the measurement results on the complex coefficients provides a posteriori shear waves in space (in the aisles of the period).Such way when multiplied by the specially selected coefficients achieved effect coherent summation of the emitted waves (including different frequencies) at an arbitrarily chosen point in space, i.e. synthetic aperture effect transmit antenna.
When receiving multichannel synthetic aperture receiving antenna at the same time it is carried out independently.
The practical significance of the results is to determine the prospects for a high information transceiver systems in which without the use of any physical controls phases radiated and received signals is achieved by formation and management NAM transmitting and receiving antennas with no restrictions on the frequency and bandwidth of the signals used. It should be noted that the multi-aperture synthesizing antenna requires a large amount of computation. Therefore, only the constant growth of computer technology capabilities, ensure the relevance of the issue.
The article contains 4 figures and 20 references to sources of information.

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June 24, 2020
May 29, 2020

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