Abstract

The question of what concept should be chosen for the case of an active, two-dimensional electronically scanning ground-based radar with many elements for jammer suppression in a dense jamming environment is discussed. The nonadaptive low sidelobe antenna is compared with the adaptive antenna. Although both antennas have the same performance for sidelobe jammers, the low-sidelobe (LS) antenna is vulnerable to main beam jamming. For multiple jammers this prevents radar operation with the LS-antenna, whereas the adaptive antenna is able to look through between the jammers. Practical aspects such as the generation of adaptive channels, channel accuracy, and ground reflections are mentioned. >

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