Analysis and behavioral study on insertion loss of an NLTL circuit

A simple method for calculating an NLTL circuit´s loss is presented. This approach is simple and intuitive for understanding and studying the behaviors of insertion loss slopes and spreading effects over frequency at different varactor biasing voltages. Factors that control the insertion loss slope and spreading are identified. In addition, the optimization of insertion loss as a function of circuit interconnection inductance relationship is also reported, with the condition for the existence of optimal range established. The approach and results can be readily applied to different NLTL designs in arriving at optimal NLTL circuits