Influence of an interfering second target on a certain amplitude‐comparison monopulse radar system

This paper examines angular tracking performance in an amplitude-comparison non-pulse tracking radar employing both AGC and phase synchronization (PLL) for the case where an interfering target as well as the main target are present within the beam of the tracking radar. the interfering target causes generation of an incorrect error output signal and the antenna boresight cannot be held on the main target. the effects of the interfering target are quite complex as they are dependent on the difference in Doppler frequencies of the two targets and on the bandwidths of the AGC and PLL systems. In this paper we calculate the error output using both the harmonic balance method and Galerkin's method for an arbitrary PLL bandwidth in combination with a narrowband AGC and a wideband AGC. From these results, we find that when the PLL has a comparatively narrow bandwidth the approximate analysis using the harmonic balance method gives sufficiently accurate results for practical application.