Spatial-spectral holographic materials enable the development of microwave photonic devices that can perform a varietyof demanding microwave signal processing functions, including spectrum analysis, signal correlation, time-difference ofarrival measurements, and first pulse signal capture. This paper summarizes the recently published advances in thetechnology, which include demonstration systems with over 20 GHz of instantaneous bandwidth with sub-MHz resolution,over 60 dB of spur free dynamic range, and time-difference-of-arrival geolocation of emitters down to the sub-foot level.
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