A Surface Acoustic Wave (SAW) filter is a compact and highly efficient frequency-selective device used to process radio frequency (RF) signals by converting electrical energy into acoustic waves that travel along the surface of a piezoelectric material. As these waves propagate, they interact with precisely patterned electrodes that determine which frequencies are allowed to pass and which are attenuated. Known for their excellent stability, low insertion loss, and high selectivity, SAW filters are widely used in wireless communication systems, including smartphones, GPS receivers, Bluetooth devices, and IoT applications.
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