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A novel approach to photonic generation of frequency-coded microwave signals based on optical pulse shaping using the cost efficient sampled Bragg grating technique is proposed. The generation of binary frequency-coded microwave pulse signals with center frequency of 23GHz is demonstrated via simulation.
Photonic true time delay (TTD) systems based on optical dispersive devices suffer from RF power degradation induced by dispersion. When the dispersion value is 100 ps/nm, the -3 dB bandwidth are limited to 17.6 GHz and 4.4 GHz for systems using lasers and broadband light sources, respectively. A multichannel chirped fiber grating is used to mitigate the RF power degradation in a dispersion-based TTD...
We propose a photonic beamforming network scheme based on a broadband optical source and chirped fiber grating. The principle and feasibility are proved by both theoretical analysis and experiments. In 1 to 18 GHz microwave band, experimental results show a good delay time consistency and the ratio of signal-to-noise met the practical application demands. The time consistency errors are smaller than...
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