ТРАНСФОРМАТОРЫ ПОЛЯРИЗАЦИИ ЭЛЕКТРОМАГНИТНЫХ ВОЛН МИКРОВОЛНОВОГО ДИАПАЗОНА НА ОСНОВЕ ПЕЧАТНЫХ ДИФРАКЦИОННЫХ РЕШЕТОК

Abstract

The problem of printed gratings application is considered as converters of electromagneticwaves polarization and polarizing modulators. Two directions in development of antenna engineeringare considered in this paper. In each of them the scattering fields control of an antennaarrays allows essentially to expand functionalities of radio engineering sets. The first direction isthe creation of auxiliary depolarizing reflectors for two-mirror reflector antennas and foldedlenses. In addition, in twist-reflectors based on printed gratings, it is possible to constructivelyrealize the necessary phase distributions of the field on their surfaces. Thus, it becomes possible touse such twist-reflectors to create phase-correcting twist-reflectors. The second direction is connectedto application of antenna arrays for a reduction of a radar cross section of the radartrackingtargets. Transformation of a field polarization by an antenna array allows to achieve boththese purposes. In an aspect of high cost and complexity of arrays experimental researches as a method of the analysis the mathematical simulation is selected. Besides, it is shown that introductionof impedance loads in the construction of the re-radiating elements of the printed gratingopens additional possibilities for controlling the field scattered by it. Thus, twist reflectors withimproved characteristics can be realized on the basis of microstrip-pin gratings. The given resultscan be used for choosing the most of rational electrodynamic structure geometry variant at decisionof particular problems by antennas engineering. The possible flat arrays based on printedcomplicated shape elements application area is also discussed and it's shown these arrays are thevery attractive type for controllable radioelectronic covers designing at microwaves. Some numericalresults presented prove the possibility of a printed reflectarrays application as smart coversmicrowave modules.