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- W4292387524 abstract "The simulation of nonreciprocal backscattering of microwaves by lithium niobate crystals upon excitation of ultrasonic vibrations in them has been carried out. The model is based on the analysis of the propagation of electromagnetic waves in the system source - crystal - dielectric substrate - metal screen - receiver. The calculation of the spectral components of the reflected waves that proceed in the crystal by excitation of ultrasonic vibrations is carried out. It is theoretically shown that during elastic ultrasonic vibrations in the crystal, the phase and amplitude of the reflected wave are modulated, as a result of which harmonics appear in the spectrum of the original signal with the modulation frequency of the permittivity and multiples of it. It is argued that this can be regarded as the appearance of the effect of nonreciprocity of backscattering, since the spectra of the original and reflected signals do not coincide. Experimental studies that confirmed the theoretical results were carried out at the frequency of the emitted signal of 33 GHz when ultrasonic vibrations with a frequency of 50.3 kHz were excited in crystals and in their absence. The most important physical property revealed as a result of modeling and experimental investigation of crystal backscattering is the possibility of technical execution of the controlled Doppler frequency shift by a fixed cell when determining the speed of the simulated object." @default.
- W4292387524 created "2022-08-20" @default.
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- W4292387524 date "2022-06-30" @default.
- W4292387524 modified "2023-09-25" @default.
- W4292387524 title "A New Reflective-type Element for Metasurface Based on a Bulk Lithium Niobate Crystal" @default.
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- W4292387524 doi "https://doi.org/10.1109/edm55285.2022.9855043" @default.
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