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Time and frequency modulated arrays have numerous application areas including radar, navigation, and communications. Specifically, a time modulated array can create a beampattern with low sidelobes via connecting and disconnecting the antenna elements from the feed network, while the frequency modulated frequency diverse array produces a range-dependent pattern. In this paper, we aim to introduce...
Frequency diverse array (FDA) antenna using uniform frequency increments produces a S-shaped range-angle-dependent transmit beampattern, which can provide more degrees of freedom (DOFs) to suppress the interferences with different ranges. However, the S-shaped beampattern is coupled in the range-angle dimension and consequently results in inaccurate target localizations. In this letter, we proposed...
Different from phased-array providing range-independent beampattern, frequency diverse array (FDA) yields range-dependent transmit beampattern. Since ambiguity function is an effective tool to analyze the time-delay (range) and Doppler resolution performance of various radar systems, this paper derives the FDA radar ambiguity function and optimizes the ambiguity function with simulated annealing algorithm,...
This paper proposes an adaptive radio frequency (RF) stealth beamforming for frequency diverse array (FDA) radar using spoiled frequency increments. Since active radars are highly visible to intercept receivers, traditional high-gain phasedarray antenna beam is replaced by a series of low-gain FDA beam with nonlinear frequency increments to reduce the system visibility, and it achieves the same performance...
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