排序方式： 共有13条查询结果，搜索用时 15 毫秒
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We describe the design, fabrication, testing, and antenna-range demonstration of a photonic wavelengthmultiplexed true-time-delay steering system for use with broadband phased-array antennas. The prototype system is based on a unique hardware-compressive architecture and can drive 16 antenna elements over the 0.35-2.1-GHz band with 6-bit angular resolution over a ±45° scan angle. 相似文献
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We describe the design and development of an eight-element hardware-compressive receive true-time-delay steering system that employs wavelength-division multiplexing. The laboratory system performance and results from the system demonstration at the antenna range are discussed. 相似文献
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We compare the weight, size, and power consumption of conventional and fiberoptic manifolds for a large dual-band (S and UHF) array antenna. The conventional manifold is based on a corporate feed comprised of coaxial cables and stripline combiner circuits. In the fiberoptic manifold, optoelectronic devices are used to convect the signals between the optical and electrical domains at the manifold interfaces, and then the signal distribution and combination are implemented with optical fiber. Both designs meet the same bandwidth, output power, and signal-to-noise ratio requirements 相似文献
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The promise shown by acoustooptic (AO) spectrum analyzers and correlators in field-test prototypes for radar, communications and electronic-warfare surveillance is discussed. The principle of operation of AO devices is explained, and its use for correlation and convolution is examined. Two types of Bragg cell (the basic AO component) are described: surface-acoustic-wave (SAW) and bulk cells. The use of a 2-D AO correlator (i.e. one that moves its output beam over an array of photodetectors rather than a single line) in a spread-spectrum receiver is presented to exemplify the use of AO devices 相似文献
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