Transmission Curves of High-Frequency Networks

The aim of this article is to deduce the design data on frequency transmission, which are necessary in designing the networks for high-frequency modulated waves. In the first section the general laws of current variations in circuits tuned to carrier frequency with and without tube generator are derived; the interdependence of current curves of various circuits forming a given network is also clarified. The second section gives the derivation of the transmission curve equation for a two-circuit system, analyzes the curve shape as dependent upon the parameters of the circuits and the coupling factor between them, and also explains the part the tube generator plays in restricting the field of application of formulas derived. Moreover, the equation of the current curve for inaccurately tuned circuits is given, which shows that inaccurate tuning results in asymmetrical curves and for that reason is not to be recommended. The third section contains the derivation of the transmission curve equation for a three-circuit system and the analysis of the curve shape as dependent on parameters of circuits and coupling factors between them.