| 单词 | frequency band |
| 释义 | > as lemmasfrequency band frequency band n. = band n.2 14. ΘΚΠ society > communication > telecommunication > [noun] > signal > frequency or band of frequencies > band of frequencies sideband1921 frequency band1922 passband1922 waveband1923 S-band1946 baseband1952 guard band1956 vestigial side band1966 1922 Bell Syst. Techn. Jrnl. July 117 The method consists in analyzing the speech waves as impressed on a condenser transmitter, using a tuned circuit to transmit narrow frequency bands of energy. 1929 J. H. Morecroft Elem. Radio Communication iii. 82 The normal frequency band for broadcasting purposes is..from 550 to 1500 kilocycles. 1956 C. E. Tibbs & G. G. Johnstone Frequency Modulation Engin. (ed. 2) v. 106 Of the three major frequency bands, the v.h.f. band has been developed rapidly. < as lemmas |
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