Eigen Parameters of Bragg Layered Structures
The influence of various types of distortion of periodicity on the eigen parameters of the layered Bragg resonators has been analyzed. The perturbation of parameter of periodical Bragg structure is a flexible tool to obtain the desired reflection and transmission characteristics. Apodization of Bragg reflectors leads to significant reduction of side lobes, while the main maximum is expanding, and its amplitude decreases slightly. The conditions of reduction of the quality factor of unwanted side Bragg oscillations in quasiperiodic apodized resonators have been determined. It has been proposed the construction of periodic and quasiperiodic structures and apodized Bragg resonators with thin contrast layers, which are relatively easy technologically implemented in the microwave range.
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