V. I. Chasnyk, D. V. Chasnyk, O. M. Kaidash, I. P. Fesenko, S. A. Kukharenko
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引用次数: 0
Abstract
To improve further the designs and ensure the stable operation of vacuum electronic devices that function in the ultra-high frequency (UHF) range at 1–100 GHz, the characteristics of microwave radiation absorption have been enhanced. We addressed the highly complex task of producing bulk absorbers made from AlN–Mo composites with a high attenuation level of 10–12.3 dB, which corresponds to a microwave radiation absorption coefficient of 37–56 dB/cm. They achieved a good low voltage standing wave ratio (VSWR) value of 1.5–1.6 in the frequency range of 9.3–10 GHz. The study found that chemical treatment of the absorber’s surface, which involves removing molybdenum particles using an acid mixture, improves matching by reducing microwave radiation reflection values, consequently decreasing the VSWR peak by 26–30%.
期刊介绍：
Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.
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