Ultra-Fast Tunable Microwave Filter. Phase 2, Task 1.
Final rept. 1 Jun 1979-15 May 1980,
RCA LABS PRINCETON NJ
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Varactor-tunable resonant filter elements that use the negative resistance of an FET to overcome the losses of the varactor and the circuitry were used to construct two three-section filters. One filter operates in the tunable frequency range from 8.4 to 9.2 GHz a second filter, in the required 9. 1- to 9.6-GHz frequency range. Midband insertion loss is typically 0 dB 3-dB bandwidth is 100 MHz.
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