منابع مشابه
Optically Interconnected Phased Arrays
Phased-array antennas are required for many of NASA's future missions. They will provide agile electronic beam forming for communications and tracking in the range of 1 to 100 GHz. Such phased arrays are expected to use several hundred GaAs monolithic microwave integrated circuits (MMIC's) as transmitting and receiving elements. However, the interLn CO connections of these elements by conventio...
متن کاملExperimental Study of Probe-Sample Contact Influence on Dispersion Curve Measurement with Phased Arrays in Plates
Dispersion curves of guided modes in plate-like structure are used to investigate elastic properties. Laser based ultrasound are conventional contactless techniques to acquire dispersion curves. Measurements are broadband and quite sensitive but time consuming. Linear transducer arrays in contact with the sample can also be used to generate and measure guided modes in plate. Measurements are li...
متن کاملNanophotonic Visible Light Phased Arrays
Previously demonstrated integrated optical phased arrays have primarily been implemented in silicon-based platforms and have therefore been limited to operation at infrared wavelengths, where silicon provides low-loss transmission. Developing integrated optical phased arrays for visible wavelengths would enable the exploration of new applications for this technology, such as autostereoscopic di...
متن کاملOptimization of Ultrasonic Phased Arrays
Ultrasonic phased arrays are an emerging technology in nondestructive evaluation (NDE) applications. A phased array is a multi-element piezo-electric device whose elements are individually excited by electric pulses at programmed delay times [1]. Such a delay scheme allows electronically controlled dynamic beam control. One of the advantages of using phased arrays in NDE applications over conve...
متن کاملAnalysis of Beamforming in Phased Antenna Arrays
294 Abstract — In this paper the beamforming and radiation pattern of various linear and planar phased antenna arrays configurations are presented. They are intended for use in indoor location estimation and wireless process monitoring applications based on the determining of direction-of-arrival (DOA) of radio signals by measuring the angle-of-arrival (AOA). Beamforming and the steering of ant...
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ژورنال
عنوان ژورنال: International Journal of Antennas and Propagation
سال: 2017
ISSN: 1687-5869,1687-5877
DOI: 10.1155/2017/5717641