Prokopenko A. Surface wave resonators and microwave devices on its base.

The thesis is devoted to the theoretical research of microwave properties of surface wave resonators (SWR), microwave filters and devices with Josephson junctions (JJ) on the base of SWR. A spectra of eigen resonance frequencies and unloaded quality-factor of half-wave and quarter-wave resonators has been estimated. Optimum conditions of excitation of the oscillations in half-wave and quarter-wave SWR have been found. Conditions of getting maximum value of unloaded quality-factor are theoretically determined. The opportunity of exhaustion of a eigen frequency spectrum of SWR in cutoff waveguide has been shown. It is theoretically analyzed the SWR with topology elements as slits in a conducting film. The change of unloaded quality-factor of the SWR depending on quantity of JJs and their resistance has been estimated. It is shown, that the volt-power sensitivity of a square-law microwave detector on the basis of SWR with JJ array has the order of 104 V/W. Amplitude-frequency characteristics (АFC) of filters, dependence of the central frequency and AFC of filters from position of SWR in a waveguide and its relative each to other are calculated. Frequencies of related waveforms of SWR with an yttrium-iron garnet film located in a standard rectangular waveguide depending on an external dc magnetic field have been estimated. Key words: oscillations, microwave frequencies, surface wave resonator, eigen frequency spectra, quality-factor, surface wave resonator with Josephson junction array, microwave filter, quasi-optic excitation.