On the Impulse Response of Monopulse Radars
AIR FORCE INST OF TECH WRIGHT-PATTERSONAFB OH SCHOOL OF ENGINEERING
Pagination or Media Count:
The purpose of this study was to develop an analytical model to determine the response of an amplitude-amplitude monopulse radar to an impulsive input signal. This study was sponsored by the Air Force Electronic Warfare Center at Kelly AFB and represents a first step for determining if impulsive jamming has any merit against monopulse radar systems. From a literature review, it was determined that the receiver components most affected by an impulsive signal were filters in the receiver channel. Inverse Laplace transform techniques were used to determine the impulse response of a three-pole and a five-pole filter. A model of a logarithmic amplifier was also used. A fortran computer program was written to simulate imbalances between the receiving channels of the radar. The results of the analyses showed that an impulsive signal would not cause a substantial tracking error until four to six seconds after the pulse arrive at the input of the filter, which is well out of the range gate. This signal may produce angle errors in the angle circuits of the radar without being detected by the range circuitry or the operator. It is recommended that experimental results using an impulsive electronic countermeasures signal against a monopulse radar be obtained. Theses.
- Active and Passive Radar Detection and Equipment