Raltron expands RSF SAW filters for GPS, Wi‑Fi and ISM bands

Raltron has expanded its RSF series of surface acoustic wave filters for GPS, Wi‑Fi and ISM band applications in compact wireless designs. The lineup targets phones, IoT devices, automotive systems and other space-constrained products that need lower loss, better rejection and easier RF integration.

Why it matters: - Raltron’s expanded RSF filter line is aimed at designers trying to fit more RF performance into smaller devices. - The new parts target GPS, Wi‑Fi and ISM band systems that need lower interference, better coexistence and tighter spectral control. - The portfolio is relevant for smartphones, tablets, wireless sensors, automotive systems, IoT devices, wearables, drones and smart appliances.

What happened: - Raltron announced an expanded portfolio of RSF Series surface acoustic wave filters on July 23, 2026. - The company says the filters are optimized for GPS, Wi‑Fi and ISM band applications in space-constrained, high-performance designs. - Raltron said the RSF family is available in miniature chip-scale packages. - The company said product is in stock at DigiKey. - More product information is available for GPS, Wi‑Fi and ISM Band.

The details: - The RSF family is designed to deliver low insertion loss, low amplitude ripple and high out-of-band rejection. - The filters are intended to support higher power levels and can be tuned for customer requirements. - RSF GPS devices come in chip-scale packages as small as 1.1 mm x 0.9 mm. - Raltron says that footprint simplifies integration in compact GNSS receivers, asset-tracking devices, automotive navigation modules and multi-constellation timing solutions. - The 2.4 GHz Wi‑Fi filters are designed to reduce interference from cellular, Bluetooth and other nearby radios. - Those filters are meant to support cleaner RF front ends in access points, routers, gateways, smartphones and consumer electronics. - The compact footprints are intended to help engineers add selective filtering without giving up board space. - The ISM band filters are aimed at LoRa, SIGFOX and other low-power wide-area network applications. - Raltron says the ISM parts help designers meet spectral mask requirements and improve coexistence with other sub-GHz radios. - Target uses include battery-powered IoT nodes, smart meters, industrial sensors, building automation and remote-control systems. - Raltron’s engineering team offers support for SAW filter selection and integration. - That support includes impedance matching, PCB layout guidance and coexistence strategies in multi-band RF front ends. - The company said that support is meant to help customers accelerate time to market.

Between the lines: - The announcement shows Raltron pushing deeper into compact RF front-end design, where size, interference control and integration are increasingly tied together. - The emphasis on tuning, matching and coexistence suggests the company is selling more than parts; it is also offering application support for complex multi-radio systems. - Stock availability through DigiKey signals a distribution strategy that can shorten purchasing and deployment cycles for engineers.

What's next: - Raltron is likely to use the expanded RSF lineup to reach more designs across consumer, industrial and automotive markets. - The company’s support services may become part of the sales pitch as customers evaluate RF performance and integration speed. - Engineers can review the product pages linked above for band-specific details before specifying parts into new designs.

The bottom line: - Raltron is broadening its SAW filter lineup to help wireless products shrink size without sacrificing RF performance.**