Terahertz Frequency- and Mode-Insensitive Broadband Quasi-optical Converter Antenna System
| العنوان: | Terahertz Frequency- and Mode-Insensitive Broadband Quasi-optical Converter Antenna System |
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| المؤلفون: | Pu-Kun Liu, Chao-Hai Du, Hui-Qi Bian, Shi Pan |
| المصدر: | Journal of Infrared, Millimeter, and Terahertz Waves. 39:1065-1078 |
| بيانات النشر: | Springer Science and Business Media LLC, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 010302 applied physics, Diffraction, Physics, Radiation, Multi-mode optical fiber, business.industry, Terahertz radiation, Gaussian, Single-mode optical fiber, Physics::Optics, Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, law.invention, symbols.namesake, Optics, law, Gyrotron, 0103 physical sciences, Broadband, symbols, Wavenumber, Electrical and Electronic Engineering, business, Instrumentation |
| الوصف: | Recently emerged multimode gyrotron, a high-power broadband terahertz radiator, encounters the challenge of efficiently converting a series of operating whispering-gallery modes (WGMs) into free-space Gaussian beams. To this demand, we propose a frequency- and mode-insensitive antenna capable of broadband multimode converting. For a single mode, to achieve broadband operation, special reflector configuration and large-radius launcher guarantee the system high robustness to frequency-induced wave number variation. Furthermore, for a series of operating WGMs, in order to achieve multimode operation, high-order mode indices guarantees familiar field patterns and ray trajectories. In particular, high-purity Gaussian beams are simultaneously achieved in different WGMs of broad continuous bands, including 351–361 GHz for TE11,2 mode, 375–385 GHz for TE12,2 mode, and 398–410 GHz for TE13,2 mode. The results are verified by both the vector diffraction theory and the method of momentum. This kind of mode converter will promote the development of multimode gyrotrons and other antenna-feeder systems for high-power terahertz applications. |
| تدمد: | 1866-6906 1866-6892 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::af025a8168df0167bb383f631d2cb76fTest https://doi.org/10.1007/s10762-018-0523-1Test |
| حقوق: | CLOSED |
| رقم الانضمام: | edsair.doi...........af025a8168df0167bb383f631d2cb76f |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18666906 18666892 |
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