ID: 206495: 270111
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Surface acoustic wave (SAW) bandpass filters employ the piezoelectric effect to convert an electromagnetic signal into an acoustic signal, and vice versa. SAW bandpass filters provide sharp cut-off, very linear phase characteristics, and high stability, and are highly reliable and extremely stable. Electrical signals are converted to a mechanical wave in a device constructed of a piezoelectric crystal or ceramic. The wave is delayed as it propagates across the device before being converted back to an electrical signal by further electrodes. The delayed outputs are recombined to produce a direct analog implementation of a finite impulse response filter. Anatech offers a very broad range of SAW bandpass filters, which can be specified for operating frequencies up to about 34 GHz. They are extremely compact, surface-mount devices, and typically measure 3 x 3 x 2 mm.
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