ABSTRACT
This chapter discusses the resonant networks, transmission lines, Smith chart, and impedance matching networks. A transmission line is a distributed-parameter network, where voltages and currents can vary in magnitude and phase over the length of the line. Smith chart is a conformal mapping between the normalized complex impedance plane and the complex reflection coefficient plane. It is a graphical method of displaying impedances and all related parameters using reflection coefficient. It was invented by Phillip Hagar Smith while he was working at Radio Corporation of America. Impedance matching can then be done using a single open-circuited or short-circuited length of transmission line called "stub". Resonators have frequency characteristics that give them the ability to present specific impedance, quality factor, and bandwidth. They can eliminate the reactive component effects and introduce only resistive portion of the impedance at a frequency called resonance frequency.
