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The problem of reducing the side-lobe level of the radiation pattern of the trough waveguide antenna has been considered. To solve this problem, weighting the height of the elements of excitation has been used. For increasing the efficiency of the weighting, it is proposed to use a weight function that takes into account the losses of the exciting wave as it passes through the elements of the exciting...
Characteristics of semiconductor diodes as power indicators are studied. Rigorous electromagnetic model of direct problem of average detection is derived. Approximate models of the inverse problem for detector characteristic are proposed. Maximum errors of approximation for different orders of approximating polynomial and source resistance are calculated.
The time delays of pulses reflected from periodic and non-periodic Bragg layered structures have been investigated. The specific structures such as Bragg reflectors and structures with chirp variation of thickness of the “period” have been considered. The calculation has been carried out under the conditions that carrier frequency is in the vicinity of the Bragg resonance values. The parameters of...
The Prony's method realization in the presence of pulse noise has been examined. The developed method of minimizing the functional of quasi-duration for linear prediction coefficients to determine the frequency and damping factor of the signal distorted with the mixture of impulse and Gaussian noise have demonstrated its advantages over traditional Prony's method even after elimination of pulses.
The method of determining parameters of sum of complex exponentials on the basis of singular value decomposition of data matrix has been developed. Relationship of rows of signal matrix of singular vectors with parameters of complex exponentials has been demonstrated and the problem of their determination has been reduced to eigenvalue problem. The accuracy characteristics of the suggested method...
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