Abstract :
The term ¿transformer¿ is used in the broad sense to include networks consisting of a pair of L-C circuits with either inductive or capacitive coupling. This paper describes a method of designing such transformers to provide uniform transmission of power over a frequency range; the resulting insertion-loss curve is approximately symmetrical when plotted on a linear frequency scale. The frequency variable used in the design equations allows a common representation of both inductively- and capacitively-coupled forms. The extent of the uniform transmission band and the transformation ratios possible with various types of coupling are discussed. Charts are presented which simplify the process of design.
