Wideband Jammer Dynamic Frequency Notch Filter for Interference Reduction

This proposal describes the approach that Zeger-Abrams Inc. (ZA) plans to use to implement prototype models (one each) of a Low-Band (designated as 30-600 MHz) and Mid-Band (designated as 400-4,000 MHz) Cosite Notch Filter (CNF). Each CNF will filter out selected narrow spectral portions from the output of a jammer power amplifier while allowing it to pass the rest of its designated frequency range with very low loss. Each CNF will produce four such notches that are independently tunable with center frequency accurately located at the frequencies of friendly force receivers and with accurately selectable notch widths. The Low-Band notch width will be selectable from 45 kHz to 8 MHz. The Mid-Band notch width will be selectable from 1 MHz to 8 MHz.