| 单词 | coaxial cable |
| 释义 | > as lemmascoaxial cable c. coaxial cable, a cable containing several coaxial lines and usually also conductors to supply repeaters and other associated equipment; also, a coaxial line; coaxial line, a transmission line made up of two concentric circular conductors separated by an insulating medium, used esp. for medium and high frequency signals in television and multiplex telephony. Also elliptical as n. ΘΚΠ society > communication > telecommunication > telegraphy or telephony > [noun] > line wire1813 line1847 wire line1848 loop1863 landline1865 saddle wire1876 telephone line1877 concentric cable1888 Pupin cable1904 multiple twin1922 quad1922 twisted pair1923 star quad1927 music line1929 coaxial cable1934 coax1945 1934 Electr. Comm. XIII. ii. 159 Frequency bands of the order of 1,000 kc. or more may be transmitted for long distances over coaxial lines and utilised for purposes of multiplex telephony or television. A coaxial line is a metal tube surrounding a central conductor and separated from it by insulating supports. 1935 Electr. Comm. XIII. iv. 351/2 If similar conducting and insulating materials are used, shielded balanced pairs and coaxials have similar transmission-frequency characteristics. 1936 Electr. Comm. XIV. iii. 175/1 The coaxial cable systems where all channels are carried over a single coaxial line. 1938 Times 7 Jan. 14/1 The alternative..is to feed the provinces from London by a special land-line, known as a co-axial cable. 1940 Chambers's Techn. Dict. 172/1 Co-axial cable, a type of cable in which a central conductor is surrounded by an outer tubular conductor... Its low attenuation makes it suitable for the transmission of video-frequency currents in television. 1943 Electronic Engin. 16 64 The distribution of the signal via video frequency local co-axial cable networks. 1955 Sci. Amer. Apr. 48/3 A coaxial cable can handle only 600 phone calls and two TV shows. 1959 Ann. Reg. 1958 521 It was agreed..that a round-the-world Commonwealth coaxial-cable telephone system should be constructed. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) III. 245/2 In a typical cable each coaxial line has an outer conductor with an inside diameter of o·375 in. < as lemmas |
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