Parameter Insensitive Matching Circuits for Low Cost Integrated Circuits
Alfy Riddle, Robert J. Trew · 2005
A new theory for increasing the tolerance of matching networks to load variations is presented. This theory is based on matching the angles of the changes in S/sub 11/(f) due to frequency and load variations, and its use can double allowed device tolerances in many cases. As a byproduct, this theory also shows why Chebyshev matching filters have poor tolerances. Examples are given showing as much as an order of magnitude improvement in circuit tolerances.