SAW FILTERS

Tokenchinas broad SAW filter product offering serves growing and popular markets. The miniaturized packages meet needs for smaller, lighter, and lower-profile products. The SAW filter's superior technical performance provides solutions for new design challenges.

SAW filters are small in size, have excellent selectivity, and have high stop-band rejection. The target applications include: 1.57GHz for GPS applications, 315 and 433.92MHz for remote keyless entry and security applications; as well as RFID, automated meter reading, and wireless data radios.

The FM Series is lead-free and RoHS compliant. Please contact us for details with your specific needs.

SAW Filter General Information

Surface Accoustic Wave (SAW) fundamentals provide for a piezoelectric material that converts an incoming electromagnetic signal into an acoustic signal, and vice versa. In its most basic form, a SAW filter consists of a polished piezoelectric substrate with a deposit of two transducers with interdigital arrays of thin electrodes.

The electrodes making up the arrays alternate polarities so that when an RF signal voltage is applied across them, a surface wave is then generated. In designing a SAW Filter, the overall frequency response characteristics are determined by deriving two impulse responses for the two transducers whose transforms are added together in dB. The surface of a piezoelectric substrate is then etched with the two impulse responses.

Features

• Excellent Rejection.
• Small External Impedance Matching.
• RF Low Loss Filter for Remote Control Receivers.

Applications

• Wireless Keyboards, Wireless Mouse
• Wireless Joysticks, Wireless Lamp Switching
• Wireless Security Systems, Wireless Barcode Reader
• Security, Communications, Tive pressure Monnitoring System
• Automotive Keyless Entry (RKE), In-house Arrest Systems, Data link
• Global Positioning System (GPS), Radio Frequency Identification (RFID)