The requirements for true time steering of phased array antennas are reviewed, and the resulting delay line hardware requirements are discussed. Two hardware-compressive fiber optic delay line architectures are then briefly described and quantitatively compared. The basics of phased array antenna partition are then presented. Based on these principles a delay-compressive and element-compressive 2-D fiber optic delay line architecture is described, and its basic characteristics and capabilities are discussed.
Mercurous chloride crystals, recently synthesized in large good optical quality boules by vapor deposition, have been characterized as to their unusual acoustooptic properties. This material offers the potential for superior performance Bragg cells for signal processing and tunable filters. We have developed fabrication techniques to overcome severe problems associated with its high chemical reactivity, designed transducer structures, and built and tested a number of devices.
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