Microwave Networks with Constant Delay

A general class of transfer functions whose delay is constant at all frequencies and capable of realization by commensurate TEM microwave networks is presented. Examples of this class where the transducer power gain has equiripple behavior in the passband, the stopband, or both, are given. Forms suitable for lowpass or bandpass filters or broadband matching transformers are derived. The synthesis of networks to realize all of these functions is given in terms of closed formulas for the necessary roots. In general, microwave Brune, C, and D, sections are required in the realization.