SAW Filter Products
2Pages

SAW Filter Products Vectron International Advantages of Vectron International Vectron International has been developing passive electronic components like SAW filters, SAW resonators and monolithic crystal filters (MCF) since the early 1990s. We work closely with our customers to understand their application and by working together, we can offer the highest quality component that meets your cost and performance requirements. Our flexible design capabilities and cost optimized production facilities allow us to offer components for high volume and high performance markets. SAW Filter Products Types of SAW Devices World-Wide Locations • Precision Vectron is and will remain, a world-class supplier to its global market and will apply innovative, forward-looking, ethical principles in complying with the requirements of that market. We are totally committed to recognizing the needs of our customers, and responding to those needs with superior quality, service, responsiveness and specification compliance. All of our employees are dedicated to these principles with total customer satisfaction and continual improvement as their constant goal. Transversely-Coupled Resonator Filter • IEF Impedance Element Filter Single Phase Unidirectional Transducer • Resonator SAW Resonator Longitudinally-Coupled Resonator Filter How Do SAW Filters Work? Highly polished piezoelectric crystal wafer cuts for SAW filters are non-dispersive in frequency, i.e. independent of the frequency of the Surface Acoustic Wave, its velocity is almost constant. The piezoelectric effect allows for the design of transducers that convert electromagnetic energy from an electronic circuit to acoustic energy (and vice-versa) in the form of a traveling wave on the surface of the crystal. VI Cincinnati 4914 Gray Road Cincinnati, OH 45232 Tel: 1.513.542.5555 Fax: 1.513.542.5146 Europe SAW Filter Products VI Neckarbischofsheim Landstrasse, D-74924 Neckarbischofsheim, Germany Tel: +49 (0) 7268.8010 Fax: +49 (0) 7268.801281 VI Teltow Potsdamer Strasse 18 D-14513 Teltow, Germany Tel: +49 (0) 3328.4784.17 Fax: +49 (0) 3328.4784.30 VI Shanghai 1589 Century Avenue, the 19th Floor Chamtime International Financial Center Shanghai, China Tel: +86 21 60812888 Fax: +86 21 61633598 • SAW Resonators • High Performance RF Filters • High Volume Low Cost RF-Filters up to 2.7 GHz VI Singapore 56 Serangoon North Avenue 4, #06-01 Singapore, 555851 Tel: +65 65551926 Fax: +65 65554377 Helping customers Innovate, Improve & Grow Rev# 004 February, 2012 The frequency response of a SAW filter is determined by its properties both transduction and reflection and the interaction of the transducers. SAW Filter Impedance Matching Networks • Some SAW filters, especially IF filters require matching networks These include TCRF, SPUDT, SFIT. • Other SAW filters such as the LCRF may or may not require matching. • The IEF type does not generally require matching . • Precision filters that are narrow bandwidth will quite often require matching to flatten the passband. The wider bandwidth filters seldom require matching. • Whether the filter is driven balanced or single ended, has no effect on whether it should be matched or not. • Impedance matching for single-ended driven SAW filters generally require two components on each input and output. • SAW Filters Asia www.vectron.com Slanted Finger Interdigital Transducer • LCRF VI Mount Holly Springs 100 Watts Street Mount Holly Springs, PA 17065 Tel: 1.717.486.3411 Fax: 1.717.486.5920 Vectron’s Commitment to Quality • SFIT • SPUDT VI Hudson, Corporate Headquarters 267 Lowell Road Hudson, NH 03051 Tel: 1.888.328.7661 Fax: 1.888.329.8328 Bidirectional, High Loss • TCRF United States www.vectron.com INPUT IDT OUTPUT IDT RG RL Vin SAW SAW absorber SAW Piezoelectric substrate SAW absorber Power Handling Capabilities of SAW Filters • The power handling capability depends on the design. • Precision SAW filters can handle more power than resonant SAW filters. • The failure mode is metal migration and then shorting.

IF Filters Vectron SAW designers utilize SFIT (Slanted Finger Interdigital Transducer) filters to provide low insertion loss with a wide bandwidth. SFIT filters are implemented with parallel connections of a high number of narrow band, low-loss filters. This allows an effective generation of SAW for each frequency in the passband. Vectron has generated a set of sophisticated design tools to achieve low group delay ripple, and the suppression of reflections including the triple transit signal. Optimized SPUDT (Single Phase Unidirectional Transducers) filters combine transversal and resonant...