Results 261 to 270 of about 156,538 (310)
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2012 IEEE International Conference on Wireless Information Technology and Systems (ICWITS), 2012
A new dielectric resonator ESPAR antenna phased array was investigated. The array showed ± 30° scanning capabilities. The array was matched for all the scanning directions and achieved a gain better than 8dBi.
Mohammad Ranjbar Nikkhah +2 more
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A new dielectric resonator ESPAR antenna phased array was investigated. The array showed ± 30° scanning capabilities. The array was matched for all the scanning directions and achieved a gain better than 8dBi.
Mohammad Ranjbar Nikkhah +2 more
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IETE Journal of Research, 1999
This paper presents the case of an optical phased array in analogy with its counterpart in the microwave frequency region. It consists of a planar aperture array formed by the discrete illuminated core ends of a number of monomode optical fibres placed adjacent to each other in several rows.
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This paper presents the case of an optical phased array in analogy with its counterpart in the microwave frequency region. It consists of a planar aperture array formed by the discrete illuminated core ends of a number of monomode optical fibres placed adjacent to each other in several rows.
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International Symposium on Antennas and Propagation Society, Merging Technologies for the 90's, 1990
It has been shown by H. Shnitkin (1985) that a 1-D electronically phased array can be aligned to a direction determined by the propagation constant in an ancillary, lightly coupled traveling-wave waveguide feed provided for that purpose. This linear array phase alignment method is extended to a general 2-D phased array alignment and failure isolation ...
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It has been shown by H. Shnitkin (1985) that a 1-D electronically phased array can be aligned to a direction determined by the propagation constant in an ancillary, lightly coupled traveling-wave waveguide feed provided for that purpose. This linear array phase alignment method is extended to a general 2-D phased array alignment and failure isolation ...
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1993
This chapter is a comprehensive treatment of phased arrays, including (1) array theory, analysis and synthesis techniques; (2) the detailed treatment of array elements and mutual coupling effects; and (3) active arrays - architectures, transmitter-receiver (T/R) modules, feed and control, design criteria and low-sidelobe techniques.
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This chapter is a comprehensive treatment of phased arrays, including (1) array theory, analysis and synthesis techniques; (2) the detailed treatment of array elements and mutual coupling effects; and (3) active arrays - architectures, transmitter-receiver (T/R) modules, feed and control, design criteria and low-sidelobe techniques.
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1971 2nd European Microwave Conference, 1971
The theory of array antenna design has matured such that the tools are now available to design elements with predictable performance and to verify this performance with high confidence. The antenna feed is of equal importance to the antenna element.
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The theory of array antenna design has matured such that the tools are now available to design elements with predictable performance and to verify this performance with high confidence. The antenna feed is of equal importance to the antenna element.
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Phased arrays with sub-array architecture
Proceedings 2000 IEEE International Conference on Phased Array Systems and Technology (Cat. No.00TH8510), 2002This paper presents a simplified true time delay beam steering at the element level which is no more complex than using a phase shifter at each element of the sub-array. The architecture described here makes multiple use of switched time-delays and thereby significantly reduces the complexity.
J.B.L. Rao +4 more
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IEE Review, 1988
We all know what a radar antenna looks like—a circling dish.
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We all know what a radar antenna looks like—a circling dish.
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1977
Phased arrays serve the same purpose as multi-element switched arrays, and that is electronical fast scanning, with ultrasound.
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Phased arrays serve the same purpose as multi-element switched arrays, and that is electronical fast scanning, with ultrasound.
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IEEE Transactions on Antennas and Propagation, 2001
Since accurate pointing of a beam of a phased array antenna demands precise control of phase and amplitude, periodic calibration of the gain and phase of the electronics is essential. Calibration may be performed by pointing a beam of an array at a fixed location and transmitting or receiving signals that permit calibration of individual elements.
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Since accurate pointing of a beam of a phased array antenna demands precise control of phase and amplitude, periodic calibration of the gain and phase of the electronics is essential. Calibration may be performed by pointing a beam of an array at a fixed location and transmitting or receiving signals that permit calibration of individual elements.
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