08993A - Impedance Transformation and Impedance Matching July 2004 2003 Fabian Kung Wai Lee 1 References [1] R. Ludwig, P. Bretchko, “RF circuit design - Theory and applications”, 2000 Prentice-Hall. [2] D.M. Pozar, “Microwave engineering”, 2nd edition, 1998 John-Wiley & Sons. [3] R.E. Collin, “Foundation for microwave engineering”, 2nd edition, 1992, McGraw-Hill. July 2004 2003 Fabian Kung Wai Lee 2 1 Impedance Transformation An impedance transformation network is a two-port network that when connected in series with an impedance ZL at one port, will result in Zs being seen on another port. ZL is usually not equal to Zs (otherwise there will be no need for transformation). Zs is known as the image impedance of ZL. We immediately notice that the transformation network is a 2-……