单词 | sky wave |
释义 | > as lemmassky wave sky wave n. Radio a radio wave reflected back towards the earth's surface by the ionosphere; cf. ground wave n. at ground n. Compounds 2a.Sky waves can be used to transmit radio signals beyond the horizon and are typically used for long wave transmissions. ΘΚΠ society > communication > telecommunication > radio communications > [noun] > radio wave > types of space wave1899 surface wave1913 CW1920 beam1924 sky wave1924 ground wave1927 tweek1933 1924 Washington Post 5 Jan. (Sports section) 4/1 ‘Ground Wires and Sky Waves,’ one of the ‘Highlights of Modern Radio Broadcasting,’ by Dr. Alfred N. Goldsmith, director of research of the Radio Corporation of America. 1944 Proc. IRE 32 668/1 Design of directional antennas for broadcast stations to prevent skywave interference to another station. 2008 J. A. Richards Radio Wave Propagation iii. 38 Compute the range at which the sky wave will have about the same field strength as the surface wave. < as lemmas |
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