AN INTERPOLATIVE TECHNIQUE FOR ON-A-PULSE DIRECTION FINDING.
SYRACUSE UNIV RESEARCH CORP N Y DEFENSE SYSTEMS LAB
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A self-calibrating direction finding DF technique for crystal-video reception of pulsed signals of frequencies from 1 GHz to 12 GHz was developed. Accuracy is plus or minus 2 degrees rms. This inertialess technique operates on-a-pulse, under a concept of interpolative DF by automatic amplitude comparison. The prototype unit comprises a fixed system of matched spiral antennas linked to broadband baluns and multiplexers, and a unique signal processor that is self-calibrating i.e., is independent of detector and amplifier transfer functions and gives direct, digital display of the aspect angle of the intercepted signal. Extension of the frequency range upward or downward is possible by modifying only the RF components of the unit. The unit is reliable and compact, weighing about 15 pounds, and can be adapted for use in a variety of tactical ground and airborne systems. It requires about 8 watts of power and has a sensitivity of about -37 dbm of crystal video reception. Author
- Direction Finding