Ceramic filters use piezoelectric ceramic resonators to pass or block specific RF frequencies, providing a low-cost, compact bandpass filtering solution for IF (intermediate frequency) stages in AM/FM radios, two-way radios, remote control receivers, and narrowband data communication modules. Our ceramic filter inventory covers 455kHz (AM IF), 10.7MHz (FM IF), and custom-frequency bandpass filters from Murata (SFECF/SFCF series), TDK (CF series), Panasonic, and Johnson — with bandwidth options from ±3kHz to ±280kHz, insertion loss from 2dB to 10dB, and attenuation greater than 60dB at adjacent channels.
Specific ceramic filter frequencies and bandwidths for two-way radio (narrowband 12.5kHz) and remote control applications are frequently subject to long lead times or have been discontinued. Welllinkchips stocks common ceramic filter types and can source hard-to-find or obsolete frequencies needed for legacy radio and communication equipment repair.
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