Results 51 to 60 of about 156,809 (211)
Phased array ultrasonic testing of gear tooth
Cogent EngineeringThis paper proposes a new testing method, phased array ultrasonic testing, for the internal defects of gear teeth, which can be used to inspect the teeth of final products, breaking the limitations of incomplete volume coverage of conventional ultrasonic
Liang Wang, Chenchen Ma
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PIN-PMN-PT Single Crystal 1-3 Composite-based 20 MHz Ultrasound Phased Array
Micromachines, 2020 Based on a modified dice-and-fill technique, a PIN-PMN-PT single crystal 1-3 composite with the kerf of 12 μm and pitch of 50 μm was prepared. The as-made piezoelectric composite material behaved with high piezoelectric constant (d33 = 1500 pC/N), high ...
Wei Zhou +5 more
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Sensors, 2022 This paper presents the application of CORPS (coherently radiating periodic structures) for feeding CRA (concentric rings array) with a reduced number of phase shifters.
Brian Sanchez +4 more
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A Scalable 6-to-18 GHz Concurrent Dual-Band Quad-Beam Phased-Array Receiver in CMOS [PDF]
, 2008 This paper reports a 6-to-18 GHz integrated phased- array receiver implemented in 130-nm CMOS. The receiver is easily scalable to build a very large-scale phased-array system. It concurrently forms four independent beams at two different frequencies from
Babakhani, Aydin +6 more
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Phased array antenna control [PDF]
, 1978 Several new and useful improvements in steering and control of phased array antennas having a small number of elements, typically on the order of 5 to 17 elements are provided.
Doland, G. D.
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Simulations of astronomical imaging phased arrays
, 2007 We describe a theoretical procedure for analyzing astronomical phased arrays with overlapping beams, and apply the procedure to simulate a simple example.
Hobson, Michael P. +2 more
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Metascreen-Based Acoustic Passive Phased Array [PDF]
, 2015 Conventional phased arrays require a large number of sources in forming a complex wave front, resulting in complexity and a high cost to operate the individual sources.
Cheng, Jian-chun +4 more
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Results in Physics, 2019 The selection of element for constructing a phased array antenna was carried out. It provides a relative frequency bandwidth up to 9% for the transmitting or receiving part in wireless communication system.
Lu Guoming +2 more
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Applied Sciences, 2022 Non-destructive testing of the cracks on the in-service bolt’s shank with size M18 is a challenging technical problem. Due to the weak echo energy of cracks with large buried depths, the conventional phased array ultrasonic sector scan imaging has a low ...
Jingxing Huang +5 more
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Coaxial phased array antenna [PDF]
, 1980 A coaxial antenna array for communicating circularly polarized electromagnetic radiation is disclosed. A pair of open ended antenna cavities is coaxially constructed and operates by excitation of linear radiation elements arranged within each of the ...
Ellis, H., Jr.
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