For given conditions of design there exists an optimum proportioning or configuration which makes the high‐frequency attenuation of a given type of individually shielded circuit a minimum. Determination is made of such optimum proportioning for a wide variety of types of individually shielded circuits including several novel types designed to make the high‐frequency attenuation low in comparison with the cross‐sectional area occupied by the circuit, and the attenuation of different types is compared. The following topics and specific circuit structures are considered:
Coaxial Circuits—Basic Coaxial Circuit; Effect of Dielectric; Effect of Frequency on Optimum Ratio; Thin Walls; Stranded Conductors; Optimum Proportioning as a Function of Conductor Resistance.
Balanced Shielded Circuits—Shielded Pair (Cylindrical Conductors and Shield)—Condition for Minimum Attenuation, Condition for Maximum Characteristic Impedance, Effect of Dielectric, Effect of Frequency; Pair in Space; Shielded Stranded Pair; Pair with Shield Return; Double Coaxial Circuit; Shielded Pair (Round Conductors and Oval Shield); Shielded Pair (Quasi‐Elliptical Conductors); Shielded Quad.
The TD-2 microwave radio relay system at the present time provides six broadband channels in each direction of transmission in the frequency band between 3700 and 4200 me, each channel being capable of transmitting several hundred voice circuits. This paper describes arrangements and some of the technical problems involved whereby the number of broadband channels can be doubled with no significant penalty to the existing channels.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.