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Since the photonics-based true time delay could significantly broaden the instantaneous bandwidth of a phased antenna array system, solutions utilizing wideband signals could be enabled to considerably enhance the functionality and performance of RF systems. To investigate the features of the wideband beamforming, a comprehensive theoretical model is developed in this paper to analyze the photonics-based...
Narrowband beamforming can't be directly used in broadband system when aperture fill time exceeds the reciprocal of signal bandwidth, otherwise beam pointing deviation, sidelobe raise, even pattern serious distortion will be emerged. Therefore the broadband beamforming and its efficient and reliable realization technique are significantly important. In this paper, Farrow structure variable fractional...
The bandwidth performance of an adaptive two- element array with sensor delay lines (SDLs) attached is studied in terms of the inter-spacing between delay line sensors and the number of delay line sensors added. Compared with adaptive arrays with tapped delay-lines (TDLs) the new SDL structure has a better performance in two aspects: its output SINR drops less as the inter-delay within delay lines...
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