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International Journal of Antennas and Propagation
Volume 2010 (2010), Article ID 126757, 9 pages
http://dx.doi.org/10.1155/2010/126757
Research Article

A Comparison between Standard and Crossfeed Monopulse Radars in Presence of Rough Sea Scattering and Ship Movements

1Antenna development & EMC, Rheinmetall Italia SpA, Via Affile 102, 00131 Rome, Italy
2Department of Electronics and Telecommunications, University of Florence, Via C. Lombroso 6/17, 50134 Florence, Italy
3Astrophysical Observatory of Arcetri, National Institute for Astrophysics, Largo E. Fermi 5, 50125 Florence, Italy

Received 20 May 2010; Accepted 23 July 2010

Academic Editor: Tat Yeo

Copyright © 2010 Giorgio Giunta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Monopulse radars are widely used in tracking systems, due to their relative simplicity and theoretical precision, but the presence of multipath impairs the tracking capabilities of these radars, especially when multipath signals are strong, as in a naval environment. A special monopulse setup, the crossfeed, has been proposed in the past to provide an automatic cancellation from smooth sea multipath. In this contribution, the performances of such a system are analyzed in presence of rough sea scattering and compared with those of a standard monopulse setup. Particular attention is devoted to performance degradations due to possible phase errors in the passive network implementing the comparator and due to ship rolling and pitching. This latter requires a full 3D monopulse simulator for its correct evaluation.