SAW filters, Surface Acoustic Wave Filters

- summary or tutorial about the basics of the surface acoustic wave filter or SAW filter used in radio receivers and radio communications applications.

Surface Acoustic Wave (SAW) technology is used in many areas of electronics to provide resonators for oscillators, filters and transformers. One of the major uses of these devices is as SAW filters which find widespread use in radio applications. These SAW filters provide good performance filtering solutions while offering a cost effective solution.

SAW filters are widely used in cell phone applications for filtering. Here they provide considerable advantages in terms of cost and size, in an environment where these two aspects are of considerable importance. Additionally their importance in the cellular industry has meant that considerable amounts of research and development have been undertaken on SAW filter s in the last 20 years, and their performance has improved considerably in this period.