Active-array beamforming for ultra-wideband impulse radar

TitleActive-array beamforming for ultra-wideband impulse radar
Publication TypeConference Paper
Year of Publication2000
AuthorsHussain, M. G. M., and M. J. Yedlin
Conference NameRadar Conference, 2000. The Record of the IEEE 2000 International
Pagination267 -272
Keywordsactive antenna arrays, active-array beamforming, angular resolution, antenna radiation patterns, array signal processing, automatic beam steering, direction finding, directional distortion, directivity pattern, electromagnetic impulses, energy density spectrum, Gaussian distribution, generalized Gaussian pulse, radar antennas, radar applications, radar resolution, radar theory, radio direction-finding, sidelobe-free pattern, signal representation, spatial frequency bandwidth, ultra-wideband impulse radar
Abstract

Ultra-wideband electromagnetic impulses have found numerous applications for radar and radio communications due to the recent technological advances in electronic and opto-electronic devices. This paper presents the principle of active-array beamforming for ultra-wideband impulse radar. The theory and analysis are based on a realizable signal model representing the impulse-type waveforms used in radar applications. The signal model is referred to as the generalized Gaussian pulse. Impulse waveforms radiated and received by an active-array beamforming system suffer a directional distortion that can be regarded as useful information for direction finding and automatic beam steering. The directional distortion associated with the energy density spectrum of the generalized Gaussian pulse is derived and plotted for different values of the angle of incidence. Also, the directivity pattern of the array beamforming system is expressed in terms of the energy of the radiated and received impulse waveforms. Computer plots of the sidelobe-free directivity-energy pattern are presented too. The energy pattern yields high angular-resolution capability that improves by increasing the spatial frequency bandwidth. The spatial frequency bandwidth is an important design parameter that allows a trade-off between effective bandwidth and array length to achieve a small resolution angle

URLhttp://dx.doi.org/10.1109/RADAR.2000.851844
DOI10.1109/RADAR.2000.851844

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