The technology of fiber Bragg gratings is used as one of the most applicable technologies for construction of fiber optic sensors and telecommunication systems. Periodic irregular wave resistance located in the guiding waveguide can be regarded as analog of the fiber Bragg grating structure in the field of radio-frequency. Coaxial waveguide can be used as a guide system, so a special case of this structure is the Bragg grating on coaxial cable. Recently, the special structure of sensors were beginning to be used with heterogeneity as a discrete phase π-shift. Based on the properties analysis of the Bragg reflection characteristics of structures with a phase shift in the optical and microwave range shown advantage of using these devices in measuring systems.
The approach to selecting modes in complex systems variable multimode models based on expansion of occurring processes in generalized Fourier series on sequentially following time intervals is considered in that paper. It is showing that concerned approach gives opportunity to stabilize parameters and characteristics of radio-electronics and quantum devices with dynamic chaos by complex adaptive influences.
The complex multimode systems diagnostic approach with examples non-harmonic spectral analysis of
telecommunication systems shapers pseudo-random signals, and deformation properties of polymeric materials are
considered in that paper.
In this paper the problem of compensating of effects of deterioration of a spatial resolution SAR owing to atmospheric
propagation effects in P, VHF bands and errors of knowledge of geometry of relative driving SAR and reflecting surface
is considered. The algorithms of blind reconstruction of SAR images, based on contrast functions method, for cases both
parametrical, and nonparametric indeterminacy are offered.