Results 301 to 310 of about 189,054 (358)
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Array of Arrays: Optimizing Phased Array Tiles
IEEE Antennas and Wireless Propagation Letters, 2021This letter discusses some of the challenges for realizing large millimeter-wave phased array antennas using multiple scalable arrays (tiles). The letter uses the radiation pattern multiplication and the array of arrays concepts to analyze the effect of the tiling gap on the large array radiation pattern.
Ahmed Shehata Abdellatif +3 more
openaire +1 more source
Magnetic Resonance in Medicine, 1990
Abstract We describe methods for simultaneously acquiring and subsequently combining data from a multitude of closely positioned NMR receiving coils. The approach is conceptually similar to phased array radar and ultrasound and hence we call our techniques the “NMR phased array.” The NMR phased array offers the signal‐to‐noise ratio ...
P B, Roemer +4 more
openaire +2 more sources
Abstract We describe methods for simultaneously acquiring and subsequently combining data from a multitude of closely positioned NMR receiving coils. The approach is conceptually similar to phased array radar and ultrasound and hence we call our techniques the “NMR phased array.” The NMR phased array offers the signal‐to‐noise ratio ...
P B, Roemer +4 more
openaire +2 more sources
Optical phased array with on-chip phase calibration
Optics Letters, 2022Optical phased arrays (OPAs) with phase-monitoring and phase-control capabilities are necessary for robust and accurate beamforming applications. This paper demonstrates an on-chip integrated phase calibration system where compact phase interrogator structures and readout photodiodes are implemented within the OPA architecture. This enables phase-error
Mathias Prost +9 more
openaire +2 more sources
2020
Reverse phase protein arrays (RPPA) are used to quantify proteins and protein posttranslational modifications in cellular lysates and body fluids. RPPA technology is suitable for biomarker discovery, protein pathway profiling, functional phenotype analysis, and drug discovery mechanism of action.
Justin B, Davis +2 more
openaire +2 more sources
Reverse phase protein arrays (RPPA) are used to quantify proteins and protein posttranslational modifications in cellular lysates and body fluids. RPPA technology is suitable for biomarker discovery, protein pathway profiling, functional phenotype analysis, and drug discovery mechanism of action.
Justin B, Davis +2 more
openaire +2 more sources
Beam combining using a phased array of phased arrays (PAPA)
2004 IEEE Aerospace Conference Proceedings (IEEE Cat. No.04TH8720), 2005Mobile free space optical (MFSO) networks introduce new challenges for laser communication terminals. Network capabilities, such as packet routing where different information packets are sent to different locations, require switchable links. Also, switchable links are needed to route an information packet through different channels to the same ...
S. Serati, H. Masterson, A. Linnenberger
openaire +1 more source
IEEE Custom Integrated Circuits Conference 2006, 2006
This work comprises an array of 4 phase shifters and antennas operating at 60GHz for a beamforming system. Pass gates form the switching core for a phase selector circuit which is replicated to build up a vector modulator phase shifter. The final beam accuracy is better than 2deg for a 16-way system.
Sayf Alalusi, Robert W. Brodersen
openaire +1 more source
This work comprises an array of 4 phase shifters and antennas operating at 60GHz for a beamforming system. Pass gates form the switching core for a phase selector circuit which is replicated to build up a vector modulator phase shifter. The final beam accuracy is better than 2deg for a 16-way system.
Sayf Alalusi, Robert W. Brodersen
openaire +1 more source
Phased array of phased arrays for free space optical communications
2003 IEEE Aerospace Conference Proceedings (Cat. No.03TH8652), 2004An aperture composed of multiple small apertures has several advantages over a large continuous aperture when practical issues are included in the analysis. For example, a single bullet can easily produce a catastrophic failure of the laser communication link if all the optical gain for the transmitter (or receiver) is derived from a single large ...
S. Serati, J. Stockley
openaire +1 more source
Journal of Combinatorial Designs, 2013
AbstractA 3‐phase Barker array is a matrix of third roots of unity for which all out‐of‐phase aperiodic autocorrelations have magnitude 0 or 1. The only known truly two‐dimensional 3‐phase Barker arrays have size 2 × 2 or 3 × 3. We use a mixture of combinatorial arguments and algebraic number theory to establish severe restrictions on the size of a 3 ...
Bell, Jason P. +4 more
openaire +4 more sources
AbstractA 3‐phase Barker array is a matrix of third roots of unity for which all out‐of‐phase aperiodic autocorrelations have magnitude 0 or 1. The only known truly two‐dimensional 3‐phase Barker arrays have size 2 × 2 or 3 × 3. We use a mixture of combinatorial arguments and algebraic number theory to establish severe restrictions on the size of a 3 ...
Bell, Jason P. +4 more
openaire +4 more sources