ABSTRACT
Impedance matching is historically well established and understood. The chapter provides an complimentary picture to the previous chapter and to illustrate the design of impedance matching circuits using L-sections. L-networks are used for impedance matching in RF circuits, transmitters and receivers. L-networks are also useful in matching one amplifier output to the input of a following stage. L-sections come with different configurations, how resistors, capacitors and inductors are arranged in the circuits as we will soon see. In the designs, the types and mix of the L and C components depend on whether the source impedance is less than or greater than the load impedance. The second limitation is that it is possible to find values of inductances and capacitances that are either too large or too small at some frequencies for practical use. If the calculated reactance is practically impossible, the design is useless.
