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Introduction. Introduction. Low-profile effective antenna systems (AS) with maintained directional characteristics in a wide sector of scanning angles are required for satellite communication at mobile objects. This article investigates the directional characteristics of a subarray based on a Fabry–Perot cavity and an antenna array with mechanoelectrical beam steering.Aim. To investigate a Fabry–Perot based antenna array with mechanoelectrical beam steering and to estimate its gain and directivity at different scanning angles.Materials and methods. Computer simulations were carried out using the finite element method (FEM), finite difference time domain (FDTD) method and template based post-processing.Results. A subarray based on a Fabry–Perot cavity for an antenna array with mechanoelectrical beam steering was simulated. The efficiency of the subarray comprised at least 65 % in the 11.9…12.5 GHz frequency band. An antenna array based on a Fabry–Perot cavity with mechanoelectrical beam steering was developed and investigated. The calculated characteristics of the developed antenna array agreed well with those obtained experimentally. The gain degradation did not exceed 2.5 dB in the 0…70° scanning angle range. The advantages of using antenna elements based on a Fabry–Perot cavity and developing on their basis mobile satellite antenna systems with wide-angle scanning are noted.Conclusion. The use of a radiator based on a Fabry–Perot cavity and the development on it basis an antenna array with mechanoelectrical beam steering provides an antenna efficiency of no less than 0.5 with a gain degradation of no more than 2.5 dB in the scanning angle range 0…70° from 11.9 to 12.5 GHz.

Настоящая работа содержит результаты исследования Ð¾Ð¿Ñ‚Ð¸Ñ‡ÐµÑÐºÐ¸Ñ Ð¸ ÑÐ»ÐµÐºÑ‚Ñ€Ð¸Ñ‡ÐµÑÐºÐ¸Ñ ÑÐ²Ð¾Ð¹ÑÑ‚Ð² квантово-ÐºÐ°ÑÐºÐ°Ð´Ð½Ñ‹Ñ Ð»Ð°Ð·ÐµÑ€Ð¾Ð² с различной геометрией резонатора. Были исследованы образцы с Ñ‡ÐµÑ‚Ñ‹Ñ€ÐµÑ ÑÐºÐ¾Ð»Ð¾Ñ‚Ñ‹Ð¼, Фабри-Перо и загнутым резонаторами. Все структуры квантово-ÐºÐ°ÑÐºÐ°Ð´Ð½Ñ‹Ñ Ð»Ð°Ð·ÐµÑ€Ð¾Ð² имели расчетную длину волны излучения 7.5 мкм. Для квантово-ÐºÐ°ÑÐºÐ°Ð´Ð½Ñ‹Ñ Ð»Ð°Ð·ÐµÑ€Ð¾Ð² с Ñ‡ÐµÑ‚Ñ‹Ñ€ÐµÑ ÑÐºÐ¾Ð»Ð¾Ñ‚Ñ‹Ð¼ резонатором и резонатором типа Фабри-Перо обнаружено стимулированное излучение в многомодовом режиме. Образец квантово-каскадного лазера с загнутым резонатором продемонстрировал излучение только в спонтанном режиме. Спектральное положение полос стимулированного и спонтанного излучения в Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð½Ñ‹Ñ ÐºÐ²Ð°Ð½Ñ‚Ð¾Ð²Ð¾-ÐºÐ°ÑÐºÐ°Ð´Ð½Ñ‹Ñ Ð»Ð°Ð·ÐµÑ€Ð°Ñ Ñ Ð¾Ñ€Ð¾ÑˆÐ¾ согласуется с расчетным значением Ð¼ÐµÐ¶Ð¿Ð¾Ð´Ð·Ð¾Ð½Ð½Ñ‹Ñ Ð¿ÐµÑ€ÐµÑ Ð¾Ð´Ð¾Ð² электронов., The results of the experimental investigation of optical and electrical properties of quantum-cascade lasers with different cavity geometry are presented. Quantum-cascade lasers with four-cleaved and Fabry-Perot cavity show stimulated mid-infrared emission, whereas quantum-cascade laser with folded cavity show emission in the spontaneous regime only. Spectral positions of observed emission lines in quantum-cascade lasers are in a good agreement with theoretical calculations.