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Direction of Arrival Estimation in Low-Cost Frequency Scanning Array Antenna Systems

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Figure 2-1: Angular resolution of radars is normally defined by the antenna beamwidth [13]
Figure 2-2: Spatial smoothing scheme in uniform linear arrays
Figure 3-1: Schematic representation of a frequency scanning antenna and the process of  selecting N frequencies for which the main beam is in the
Figure 3-2: Two-way antenna gain pattern.
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