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Journal Achievements of Modern Radioelectronics №11 for 2009 г.
Article in number:
Formation of an Operated Minimum in the Diagram of an Orientation Transferring RPAM a Short-Wave Range
Authors:
A.N. Sysoev
Abstract:
The problem of formation and management of minimum DO for transferring RPAM, with use of a method of separate diagrams of orientations (DO) is solved. Required form DO can be approximated the sum of functions which refer to elementary. As them it is used initial DO with a maximum on the correspondent, and also compensatory  with a direction aside suppression and a level equal initial DO. Initial DO transferring RPAM it is set it is peak  phase distribution of currents on its radiating elements. For formation of minimum DO it is necessary to generate additional (compensatory) DO. In this case we normalize amplitude of a current on value initial DO, in the chosen direction of suppression. Using property of superposition of currents of excitation of elements RPAM creating separate DO, it is possible to define the general current of excitation of each element. The given method we shall carry out only in active RPAM where it is possible is adaptive to change both amplitude, and a phase of the currents feeding elements of an antenna lattice. In case there is one transmitter and not adjustable divider of capacity, phase synthesis is made for achievement of a task in view at identical amplitudes of currents. In this case such phase distribution on elements that form DO transferring RPAM satisfied before synthesized is calculated. Correction it is peak - phase distribution in elements RPAM it is possible, but most the simple method is realized on the basis of phase synthesis. Results of modelling show, what even on low frequencies (5 MHz) where initial DO has no lateral petals, it is possible to reach a high degree of suppression of radiation in demanded sector of space.
Pages: 32-36
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