英语词汇“half-wave antenna”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

half-wave n. one-half of a complete wave, esp. of electricity or radiation; freq. attrib., utilizing only alternate halves of a sequence of waves, as half-wave rectification ( Chambers's Techn. Dict. 1940); half a wave-length long, as half-wave antenna, half-wave dipole, etc.

ΚΠ

1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 278/1 Half wave plate, a plate of doubly refracting crystal, capable of splitting up a plane polarised ray into two portions, one of which is retarded half a wave length with respect to the other.

1912 Motor Man. (ed. 14) ii. 33 When the platinum contacts at the end of the armature touch, one-half of every complete wave flows into the accumulator, and when the contacts separate, the reverse wave of the current is interrupted at the zero or no-voltage line; thus only the half-waves of current flowing in the same direction are used.

1926 R. W. Hutchinson First Course Wireless viii. 145 If the first half-wave is positive the grid will become positive.

1926 R. W. Hutchinson First Course Wireless viii. 145 The next half-wave is negative and this still further lowers the potential of the grid.

1928 Morning Post 6 Feb. 3/4 A half wave rectifier.

1943 Gloss. Terms Telecommunications (B.S.I.) 67 Half-wave dipole, a straight aerial symmetrical in regard to its standing-wave current and usually approximately half a wavelength long.

1962 J. H. Simpson & R. S. Richards Physical Princ. Junction Transistors xii. 276 The same is true of any amplifier, such as the Class AB, whose output is asymmetrical and consists of pulses that are larger than one half-wave.

1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields xiii. 446 After having mastered the electric dipole, we shall be able to study the radiation field of the half~wave antenna—the type commonly used for transmitting radio waves.

单词	half-wave antenna
释义	> as lemmas half-wave antenna half-wave n. one-half of a complete wave, esp. of electricity or radiation; freq. attrib., utilizing only alternate halves of a sequence of waves, as half-wave rectification ( Chambers's Techn. Dict. 1940); half a wave-length long, as half-wave antenna, half-wave dipole, etc. ΚΠ 1904 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 278/1 Half wave plate, a plate of doubly refracting crystal, capable of splitting up a plane polarised ray into two portions, one of which is retarded half a wave length with respect to the other. 1912 Motor Man. (ed. 14) ii. 33 When the platinum contacts at the end of the armature touch, one-half of every complete wave flows into the accumulator, and when the contacts separate, the reverse wave of the current is interrupted at the zero or no-voltage line; thus only the half-waves of current flowing in the same direction are used. 1926 R. W. Hutchinson First Course Wireless viii. 145 If the first half-wave is positive the grid will become positive. 1926 R. W. Hutchinson First Course Wireless viii. 145 The next half-wave is negative and this still further lowers the potential of the grid. 1928 Morning Post 6 Feb. 3/4 A half wave rectifier. 1943 Gloss. Terms Telecommunications (B.S.I.) 67 Half-wave dipole, a straight aerial symmetrical in regard to its standing-wave current and usually approximately half a wavelength long. 1962 J. H. Simpson & R. S. Richards Physical Princ. Junction Transistors xii. 276 The same is true of any amplifier, such as the Class AB, whose output is asymmetrical and consists of pulses that are larger than one half-wave. 1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields xiii. 446 After having mastered the electric dipole, we shall be able to study the radiation field of the half~wave antenna—the type commonly used for transmitting radio waves. extracted from half-comb. form < as lemmas
随便看	prooftheoretic prooftheoretically proofy proopic proopium proos proosteon proostraca proostracal proostracum proot prootic prootics prooxidant prop prop basket prop bomber prop boy prop forward prop game prop girl prop man prop plane prop root prop stay

> as lemmas