SK3030R with SMD,1.1X0.9 SAW Filters ROHS is a surface mount device (SMD) radio frequency (RF) filter with a size of 1.1X0.9 inches. It is manufactured by Suntek and is compliant with the Restriction of Hazardous Substances (RoHS) directive. This filter is designed for use in RF front ends to remove unwanted interference. It is a high-performance, low-cost filter suitable for a wide range of applications including GSM systems, mobile computers, automotive Bluetooth, cordless phones, RFID and others. The filter has excellent linearity, low insertion and return losses, and low group delay variation. This allows for improved system performance and better signal-to-noise ratio.