MIL-E-5400 standard | Low & High pass Filters | Tuneable band reject Filter
Filters are (functionally) fairly simpler devices. There are a number of different types but their names indicate the kind of filter:
Pasternack RF filters are passive coaxial components available in three basic varieties: Lowpass, High pass and Bandpass. The basic function of these RF filters is to allow for certain frequencies to pass within a certain range and rejecting frequencies (attenuation) outside that given range. RF filters from Pasternack are available for use in many common frequency bands including WiFi, Bluetooth, Zigbee, GPS L1, GPS L2, GSM, PCS, UMTS, AWS and WIMAX.