RF SAW FILTERS - Custom RF Saw Filter - SMT Filter - High-Pass RF Saw Filter - Low-Pass Notch Filter - Band-Pass Filter Design

Surface acoustic wave RF Saw Filters, commonly known as SAW filters, are used primarily as band-pass RF Saw Filter and band-stop RF Saw Filter Products. RF Saw Filter Applications are typically commercial, low power electronic filtering. In additions to RF SAW filters single resonators, custom RF SAW Filter, SMT Filter, High-Pass RF Saw Filter, Low-Pass Notch Filter, and Band-Pass Filter resonators are available. These custom RF Saw Filters, Surface Mount Filters and Surface Mount SMT Saw Filter resonators are mainly used for SAW oscillator construction. RF SAW filters have found wide spread use in high volume commercial applications because of their low cost versus performance versus size. Some common RF Saw Filter applications that have adopted Custom RF SAW filters include GPS, PCS, PCN, CDMA, Wireless LAN, GMS, CATV, Bluetooth, and keyless entry.

An RF SAW filter is manufactured on a substrate of quartz or lithium niobate by applying thin layers of metal. What differentiates a RF SAW Filter from a crystal filter or monolithic filter is the mode of resonance. While traditional electronic crystal resonator filters undergo transverse modes of oscillation RF SAW filters create surface waves, or Raleigh waves. Each Raleigh wave is generated by a series of interdigital strips of gold that collectively form an IDT. The wave is launched across the substrate to another IDT that converts the mechanical energy back to electrical. It is the spacing and length of each metal strip on the IDT that determines the band-pass Filter and center frequency of the resulting RF Saw Filter or Surface Mount Filters. While these RF Saw Filters have great commercial appeal custom RF SAW Filters and SMT Filter products require specialized tooling. Thus for Custom RF SAW Filters there is typically a one time RF Saw Filter engineering charge.

Filtronetics, Inc. of Kansas City, Missouri (MO) offers RF Saw Filters in either surface mount Filter (SMD Filter) or through-hole Filter packages. Available RF Saw Filter frequency ranges vary rom High-Pass Saw Filter, Low-Pass Notch Filter, SMD Filter and custom Band-Pass Filter from 20 MHz to over 2.5 GHz. Bandwidths can vary from 100 KHz to about 20 percent of the center frequency. Filtroneics designs and manufactures RF Saw Filter products and can provide from 1 RF Saw Filter piece to over 1 million Custom RF SAW Filters.