38 research outputs found

    Π‘ΠΏΠ΅ΠΊΡ‚Ρ€ Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… ΡˆΡƒΠΌΠΎΠ² Π³Π΅Π½Π΅Ρ€Π°Ρ‚ΠΎΡ€Π°, управляСмого спин-Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΉ Π»ΠΈΠ½ΠΈΠ΅ΠΉ Π·Π°Π΄Π΅Ρ€ΠΆΠΊΠΈ

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    A phase noise of microwave oscillators having an active ring circuitry with a spin-wave delay line is theoretically and experimentally investigated. The delay line was made with yttrium iron garnet (YIG) film epitaxially grown on gadolinium gallium garnet substrate. Obtained results demonstrate a management of the oscillator phase noise with a variation of the distance between antennas used for excitation and reception of spin waves in the YIG film.Π­ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎ ΠΈ тСорСтичСски исслСдован Π³Π΅Π½Π΅Ρ€Π°Ρ‚ΠΎΡ€ Π½Π° основС Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΠ³ΠΎ ΠΊΠΎΠ»ΡŒΡ†Π°, содСрТащСго спин-Π²ΠΎΠ»Π½ΠΎΠ²ΡƒΡŽ линию Π·Π°Π΄Π΅Ρ€ΠΆΠΊΠΈ. Π­ΠΊΡΠΏΠ΅Ρ€ΠΈΠΌΠ΅Π½Ρ‚Π°Π»ΡŒΠ½ΠΎ ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ значСния уровня Ρ„Π°Π·ΠΎΠ²ΠΎΠ³ΠΎ ΡˆΡƒΠΌΠ°, ΠΈΠ·ΠΌΠ΅Ρ€Π΅Π½Π½Ρ‹Π΅ Π½Π° частотС 5390 ΠœΠ“Ρ†, составили ΠΎΠΊΠΎΠ»ΠΎ 105 Π΄Π‘Π½/Π“Ρ† ΠΏΡ€ΠΈ отстройкС 10 ΠΊΠ“Ρ†. ΠŸΡ€ΠΎΠ΄Π΅ΠΌΠΎΠ½ΡΡ‚Ρ€ΠΈΡ€ΠΎΠ²Π°Π½ способ управлСния ΡƒΡ€ΠΎΠ²Π½Π΅ΠΌ Ρ„Π°Π·ΠΎΠ²Ρ‹Ρ… ΡˆΡƒΠΌΠΎΠ² Π³Π΅Π½Π΅Ρ€ΠΈΡ€ΡƒΠ΅ΠΌΠΎΠ³ΠΎ сигнала Π·Π° счСт ΠΏΠΎΠ΄Π±ΠΎΡ€Π° расстояния ΠΌΠ΅ΠΆΠ΄Ρƒ Π²ΠΎΠ·Π±ΡƒΠΆΠ΄Π°ΡŽΡ‰ΠΈΠΌΠΈ ΠΈ ΠΏΡ€ΠΈΠ΅ΠΌΠ½Ρ‹ΠΌΠΈ элСмСнтами спин-Π²ΠΎΠ»Π½ΠΎΠ²ΠΎΠΉ Π»ΠΈΠ½ΠΈΠΈ Π·Π°Π΄Π΅Ρ€ΠΆΠΊΠΈ

    ΠœΠ΅Ρ‚ΠΎΠ΄ расчСта собствСнных рСзонансных частот оптичСских Ρ€Π΅Π·ΠΎΠ½Π°Ρ‚ΠΎΡ€ΠΎΠ² с ΠΌΠΎΠ΄Π°ΠΌΠΈ ΡˆΠ΅ΠΏΡ‡ΡƒΡ‰Π΅ΠΉ Π³Π°Π»Π΅Ρ€Π΅ΠΈ

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    A method of calculation of resonant frequencies and thus free spectral range of high-Q dielectric disk resonators with whispering gallery modes is proposed. The method is based on application to the dispersion equation derived for a dielectric cylinder with unlimited length, dimensional quantization, due to the requirement of phase balance for the standing waves in the resonator. The simplified expressions suitable for calculation of optical microcavities used in the devices of radio photons are obtained.ΠŸΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΌΠ΅Ρ‚ΠΎΠ΄ расчСта собствСнных рСзонансных частот ΠΈ, ΠΊΠ°ΠΊ слСдствиС, области свободной диспСрсии высокодобротных диэлСктричСских дисковых Ρ€Π΅Π·ΠΎΠ½Π°Ρ‚ΠΎΡ€ΠΎΠ² с ΠΌΠΎΠ΄Π°ΠΌΠΈ ΡˆΠ΅ΠΏΡ‡ΡƒΡ‰Π΅ΠΉ Π³Π°Π»Π΅Ρ€Π΅ΠΈ. ΠœΠ΅Ρ‚ΠΎΠ΄ основан Π½Π° ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠΈ ΠΊ диспСрсионному ΡƒΡ€Π°Π²Π½Π΅Π½ΠΈΡŽ, Π²Ρ‹Π²ΠΎΠ΄ΠΈΠΌΠΎΠΌΡƒ для Π½Π΅ΠΎΠ³Ρ€Π°Π½ΠΈΡ‡Π΅Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎ Π΄Π»ΠΈΠ½Π΅ диэлСктричСского Ρ†ΠΈΠ»ΠΈΠ½Π΄Ρ€Π°, Ρ€Π°Π·ΠΌΠ΅Ρ€Π½ΠΎΠ³ΠΎ квантования, обусловлСнного Ρ‚Ρ€Π΅Π±ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ баланса Ρ„Π°Π· для стоячих Π²ΠΎΠ»Π½ Π² Ρ€Π΅Π·ΠΎΠ½Π°Ρ‚ΠΎΡ€Π΅. ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Ρ‹ ΠΏΡ€ΠΈΠ±Π»ΠΈΠΆΠ΅Π½Π½Ρ‹Π΅ выраТСния, ΠΏΡ€ΠΈΠ³ΠΎΠ΄Π½Ρ‹Π΅ для расчСта оптичСских ΠΌΠΈΠΊΡ€ΠΎΡ€Π΅Π·ΠΎΠ½Π°Ρ‚ΠΎΡ€ΠΎΠ², примСняСмых Π² устройствах Ρ€Π°Π΄ΠΈΠΎΡ„ΠΎΡ‚ΠΎΠ½ΠΈΠΊΠΈ

    The resistance to failure of heavily alloyed steels

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    Phase Noise Spectrum of Microwave Active Ring Oscillators Based on Spin-wave Delay Lines

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    A phase noise of microwave oscillators having an active ring circuitry with a spin-wave delay line is theoretically and experimentally investigated. The delay line was made with yttrium iron garnet (YIG) film epitaxially grown on gadolinium gallium garnet substrate. Obtained results demonstrate a management of the oscillator phase noise with a variation of the distance between antennas used for excitation and reception of spin waves in the YIG film

    Unloading method in experimental fracture mechanics

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    Calculation of the Resonant Frequencies for a Whispering Gallery Mode Optical Resonator

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    A method of calculation of resonant frequencies and thus free spectral range of high-Q dielectric disk resonators with whispering gallery modes is proposed. The method is based on application to the dispersion equation derived for a dielectric cylinder with unlimited length, dimensional quantization, due to the requirement of phase balance for the standing waves in the resonator. The simplified expressions suitable for calculation of optical microcavities used in the devices of radio photons are obtained

    The effect of titanium on the ductility of low-alloy steel

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