Bandreject filters (or notches) are used to pass a large operating band of frequencies, while rejecting a narrow band of frequencies. This band of frequencies may have a 3 dB bandwidth as small as 0.5% or as large as 30 or 40%. The band reject filter is designed for each customer's specific frequency applications.
Trilithic provides bandreject filters in many configurations; in each of these configurations, certain electrical performances may be modified or improved. These may include insertion loss, VSWR, power handling, and/or extended passbands.
Consult the factory for any custom application needs.
Used for wider bandwidth notches - 10% to 30 or 40% - and for frequencies below 150 MHz.
Used for narrow bandwidth notches - 0.5% to 5% - and center frequencies of 30 to 400 MHz.
Used for narrow bandwidth applications - 0.5% to 5% - for center frequencies of 400 to 3,000 MHz.
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