XII. Design considerations of high-frequency twin-conductor cable

THERE ARE a large number of cases in which it is required to transfer electric power at high frequencies by means of twin-conductor cable. For example, high-power transmitting dipole antennas require twin-conductor cable capable of operating at high voltage and high frequency with minimum losses. So, too, do the dipole receiving antennas require twin cable, but with somewhat different working characteristics. Measuring circuits also very often require twin cable and, in general, whenever a circuit source of balanced power, neither side of which is at ground potential, must be transmitted by wire, a twin or duplex-conductor cable will be utilized. Conversion of coaxial circuits to balanced twins may also be desirable to obtain better shielding.