The stability and time response of fast-operating closed-loop pulsed radar circuits

The paper deals with the stability and time responses of a sampling servo-system typical of a.g.c., a.f.c., range-measuring and overall-feedback circuits used in pulsed radar equipments in which the loop-response time is not many times greater than the pulse-repetition time. The case of a high-speed radar-controlled missile may be such a system. Conditions under which Nyquist plots can be made are given. Expressions for the output both at and between the sampling times are obtained in terms of the input functions of the system. The operation of the systems in the presence of noise is considered in the Appendix. A short list of transformations suitable for analysis is included.