Robustness of Arrays with Different Waveforms

This paper examines the robustness of the basic waveform of UWB antenna arrays and Gaussian modulated sinusoidal pulse against failure of element. Simulation for circular arrays shows that pattern of Gaussian pulse is more robust and does not change for failure of elements and there is some condition that radiation of Gaussian pulse in sidelobes is zero. For Gaussian and GMS (T), the direction of maximum radiation never changes. According to tables, circular array for both GMS has better energy radiation percent than Gaussian but for linear array only GMS (T) is better. The results of the previous analysis show that significant improvement in the performance of antenna arrays patterns is possible if one is willing to abandon simple narrow-band sinusoidal signals and instead work with time gated ultra-short pulses and wavelets. The GMS is better than Gaussian in angular resolution in both modes T and 2T and it is suitable for radar applications. GMS pulse in case of element failure generates sidelobes but amplitudes of these sidelobes are smaller than Gaussian´s radiation