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5 October 2005 Single sideband modulation scheme employing an equivalent phase shifted fiber Bragg grating for a remotely controlled photonic true time-delay beamforming system
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Abstract
A single sideband (SSB) modulation scheme using a fiber-based equivalent phase shifted Bragg grating for a remotely controlled photonic true time-delay (TTD) beamforming module is presented in this paper. Photonic TTD is considered a promising technique for wideband phased array antennas (PAA) as it allows beam steering of the antenna without the beam squint problem. For remotely controlled phased array antennas, the dispersive properties of a single mode fiber induce a power penalty at higher RF frequencies when a double sideband (DSB) modulation scheme is used. The SSB modulation scheme is an effective way to eliminate this power penalty as only one sideband is transmitted and thus there is no cancellation between the two signals generated by beating the upper sideband with the optical carrier and the lower sideband with the optical carrier at a photodetector. This paper presents for the first time experimental results of a SSB modulation scheme using an equivalent phase shifted fiber Bragg grating. The true-time delay system considered utilizes a discrete uniform fiber Bragg grating prism which allows discrete beam steering capabilities for the phased array antenna.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sébastien Blais and Jianping Yao "Single sideband modulation scheme employing an equivalent phase shifted fiber Bragg grating for a remotely controlled photonic true time-delay beamforming system", Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 597124 (5 October 2005); https://doi.org/10.1117/12.628770
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