Computer analysis of a crystal filter with four crystal units

In modern communications, particularly digital one, it is very important to implement quality modules for receiver, transmitter and/or repeater units. One of the most significant components of those modules are crystal filters. This paper presents a computer simulation of crystal filter composed by four crystal units. By changing the filter parameters it is possible to tune the pass-band and stop-band filter attenuation. Using computer simulation we can select the best filter parameters assuring the quality of the manufacturing process of the appropriate filter.