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Tibbiyot va sog‘liqni saqlash
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Adabiyot. Adabiyotshunoslik. Xalq og‘zaki ijodiyoti
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Adabiyot. Adabiyotshunoslik. Xalq og‘zaki ijodiyoti
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Adabiyot. Adabiyotshunoslik. Xalq og‘zaki ijodiyoti
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Aloqa. Kommunikatsiya texnologiyalari
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COVID-19 ўтказган ҳарбий хизматчи беморларда сурункали юрак етишмовчилиги профилактикаси
COVID-19 ўтказган ҳарбий хизматчи беморларда сурункали юрак етишмовчилиги профилактикаси
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Назмшиносӣ
Назмшиносӣ (Дастури таълими барои донишчуёни шўъбаи ғоибонаи факултаҳои филологии коллечҳои омўзгорӣ)
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The ARRL UHF Microwave Projects Manual, Vol. 2
Antenna gain is essential for microwave communication, and since it helps both transmitting and receiving, it is doubly valuable. Practical microwave antennas provide high gain within the range of amateur fabrication skills and budgets. Three types of microwave antennas meet these criteria: horns, lenses and dishes. Homs are simple, foolproof and easy to build; a 10-GHz horn with 17 dB of gain fits in the palm of a hand. Metal-plate lenses are easy to build, light in weight and noncritical to adjust.1 Finally, dishes can provide extremely high gain; a 2-foot dish at 10 GHz has more than 30 dB of gain, and much larger dishes are available.