Fox filters offer excellent features such as sharp cut off characteristics, low loss and high stability over a wide temperature range which are superior to LC Filters and Ceramic Filters. The basic building block for all custom built Fox filters is the twopole monolithic filter available in standard package as shown. Twopole monolithic filters are cascaded to produce four, six and eight pole filter responses with the addition of coupling capacitors between two-pole sections. Standard Fox filters are available with center frequencies from 10.7 MHz to 90 MHz, and from two to eight poles.
For custom made filters, please specify the following: Ripple Holder Size Insertion Loss Terminating Impedance Nominal Frequency Attenuation Pass Bandwidth Spurious Response Operating Temp. Range
Note: 45F Series 45.000 MHz fundamental is a special filter designed for mobile radio and cellular phone applications.
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