| 单词 | space wave |
| 释义 | > as lemmasspace wave space wave n. [in sense (b) after German Raumwelle (A. Sommerfeld 1911, in Jahrb. der drahtlosen Telegr. u. Teleph. 4 166)] (a) a wave in three dimension (as opposed to one confined to a plane or a surface); (b) Radio a radio wave that passes from a transmitter to a receiver through space, either directly (without reflection) or with reflection from the ground. ΘΚΠ society > communication > telecommunication > radio communications > [noun] > radio wave > types of space wave1899 surface wave1913 CW1920 beam1924 sky wave1924 ground wave1927 tweek1933 1899 Science 17 Mar. 390/2 The plate now carries all the rear ends of the levers with it, which much facilitates the change from plane to space waves, and vice versa. 1917 Wireless World 5 151 The invention of thoroughly valid methods of measuring the true space wave radiation from transmitting aerials. 1943 F. E. Terman Radio Engineers' Handbk. x. 674 The ground wave can conveniently be divided into two components, a surface wave and a space wave. 1974 P. K. Harvey & K. J. Bohlman Stereo F.M. Radio Handbk. vii. 145 The range of the space-wave is chiefly determined by the height of the transmitting and receiving aerials. 2006 Jrnl. Physics D 39 4436/2 When the particles have periodic arrangement with a certain wave number, then a scattered signal can be detected as a space wave. < as lemmas |
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