SAW Band Pass Filters

SAW Band Pass Filters

Surface acoustic wave (SAW) band pass filters employ the piezoelectric effect to convert an electromagnetic signal into an acoustic signal and vice versa. A SAW bandpass filter provides sharp cut-off, very linear phase characteristics, high stability, and are highly reliable. Electrical signals are converted to a mechanical wave in a device constructed of a piezoelectric crystal or ceramic, and the wave is delayed as it propagates across the device before being converted back to an electrical signal. The delayed outputs are recombined to produce a direct analog implementation of a finite impulse-response filter. Anetech Electronics RF bandpass filters include a very broad range of SAW band pass filters that can be specified for operating frequencies from 4.75 MHz up to 6 GHz. They are extremely compact surface-mount devices and typically measure 2 x 2 x 0.5 mm, and can be as long as 50 mm in length.

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