ABSTRACT
This chapter discusses on resonant networks, transmission lines, Smith chart, and impedance matching networks. 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 the resistive portion of the impedance at a frequency called resonance frequency. At resonance, the magnitudes of the reactances of the L and C elements are equal. The reactances of the two components have opposite signs so the net reactance is zero for a series circuit or infinity for a parallel circuit. The resonant circuit becomes loaded when it is connected to a load or when fed by a source. The Q of the circuit under these conditions is called loaded Q or simply QL. The quality factor of the network with the addition of loss resistance significantly differs from the original LC parallel resonant network. The original network has an ideally infinite value of quality factor.
