The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Kin-lu Wong - One of the best experts on this subject based on the ideXlab platform.
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Crosspolarisation characteristics of Cylindrical triangular microstrip antennas
Electronics Letters, 1998Co-Authors: Shyh-tirng Fang, Kin-lu WongAbstract:Crosspolarisation characteristics of triangular microstrip antennas mounted on a Cylindrical Body are studied using a full-wave analysis. Numerical results of the far-zone copolarised and crosspolarised radiated fields at the TM/sub 10/ mode for different cylinder radii and flare angles are calculated and analysed. A significant dependence of the crosspolarisation level on the cylinder radius and flare angle is observed. Details of the results are presented.
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Mutual coupling between triangular microstrip antennas on a Cylindrical Body
Electronics Letters, 1997Co-Authors: Kin-lu WongAbstract:The full-wave solutions and measured results of mutual coupling coefficients between two Cylindrical-triangular microstrip antennas are presented. Both E-plane and H-plane coupling cases are studied. Theory and experiment are in good agreement.
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Analysis of microstrip open-end and gap discontinuities on a Cylindrical Body
IEEE Antennas and Propagation Society International Symposium. 1995 Digest, 1995Co-Authors: Hua-ming Chen, Kin-lu WongAbstract:Rigorous analysis of microstrip discontinuities on Cylindrical surfaces is useful in the design of microstrip circuits on a Cylindrical Body. However, related studies are very scant in the open literature. This paper presents a full-wave solution for Cylindrical microstrip open-end and gap discontinuities. Numerical results are obtained using a moment-method calculation, in which a combination of entire-domain sinusoidal and piecewise sinusoidal (PWS) basis functions is used to represent the currents on the microstrip line. The characteristics of such microstrip discontinuities for various curvatures are analyzed.
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Analysis of Cylindrical printed slot and slot-coupled microstrip antennas
IEEE Antennas and Propagation Society International Symposium. 1995 Digest, 1995Co-Authors: Ruenn-bo Tsai, Kin-lu WongAbstract:Analysis of microstripline-fed printed slot and slot-coupled microstrip antennas becomes complicated, when the actual currents on the feed line are modeled. Recently, the complexity of the theoretical analysis for such antenna structures has been reduced by using the reciprocity analysis, which considers only the fundamental-mode propagation on the microstrip feedline. The obtained results based on the reciprocity analysis are also found to be in good agreement with the measured data. In this paper, the extension of this method to the analysis of such antenna structures on a Cylindrical Body is described. Both the input impedance and radiation pattern for the Cylindrical printed slot and slot-coupled microstrip antennas with various curvature radii are calculated and discussed.
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Mutual coupling between Cylindrical-rectangular microstrip antennas
Proceedings of IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting, 1994Co-Authors: Shyh-yeong Ke, Kin-lu WongAbstract:Mutual coupling between antenna elements is of great importance in antenna array designs. Many studies for the mutual coupling effects between planar microstrip antennas have also been published. However, related studies for the mutual coupling between conformal microstrip antennas are very scant. The authors present a full-wave analysis of the mutual coupling between two probe-fed rectangular microstrip antennas on a Cylindrical Body. Numerical results of the mutual impedance between antennas and the mutual coupling coefficient S/sub 12/ are calculated using a moment method calculation. Typical results of the mutual impedance and mutual coupling for the microstrip antennas on a Cylindrical Body with different curvature radii are presented. previously measured and calculated data of mutual coupling for two planar rectangular microstrip antennas are also shown for comparison.
V.b. Philippov - One of the best experts on this subject based on the ideXlab platform.
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Diffraction by a line of curvature jump (a special case)
IEEE Transactions on Antennas and Propagation, 2001Co-Authors: A.s. Kirpichnikova, V.b. PhilippovAbstract:We consider the problem of diffraction of a short-wave field by a Cylindrical Body with the boundary that consists of a half plane and a convex-Cylindrical surface jointed together along a straight line. The main feature of the problem under consideration is the jump of curvature of the boundary on the line. The problems with the Dirichlet, Neumann, and impedance boundary conditions are considered. The main terms of asymptotic expansion of wave fields for the problems are constructed.
Babak Ziaie - One of the best experts on this subject based on the ideXlab platform.
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Vibration-Induced Frequency-Controllable Bidirectional Locomotion for Assembly and Microrobotic Applications
IEEE Transactions on Robotics, 2009Co-Authors: Zhenwen Ding, Babak ZiaieAbstract:This paper describes vibration-induced bidirectional locomotion of a milliscale Cylindrical Body. Using a laterally vibrating platform, we achieved a frequency controlled bidirectional movement by attaching two polydimethylsiloxane Cylindrical rods with microscale ratchet-shaped legs of different densities facing in opposite directions. The polymeric Body (2 times 2 times 20 mm3) was placed on a glass slide covered by thin lubricating oil and vibrated at a constant amplitude of 0.2 mm. The micromobile composite cylinder changed its direction of motion at a cross-over frequency of 156 Hz. The cross-over phenomena is due to the difference between static and kinetic friction coefficients of the two opposing parts.
A.s. Kirpichnikova - One of the best experts on this subject based on the ideXlab platform.
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Diffraction by a line of curvature jump (a special case)
IEEE Transactions on Antennas and Propagation, 2001Co-Authors: A.s. Kirpichnikova, V.b. PhilippovAbstract:We consider the problem of diffraction of a short-wave field by a Cylindrical Body with the boundary that consists of a half plane and a convex-Cylindrical surface jointed together along a straight line. The main feature of the problem under consideration is the jump of curvature of the boundary on the line. The problems with the Dirichlet, Neumann, and impedance boundary conditions are considered. The main terms of asymptotic expansion of wave fields for the problems are constructed.
Dmitri Knyazkov - One of the best experts on this subject based on the ideXlab platform.
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MMAR - Modeling and Identification of Cylindrical Bodies with Free Convection and Peltier Elements as Sources for Active Heating
2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR), 2018Co-Authors: Dmitri Knyazkov, Julia Kersten, Georgy Kostin, Harald Aschemann, Andreas RauhAbstract:The paper considers the modeling of active heating or natural cooling of a Cylindrical Body, - either vertically or horizontally arranged. The position dependency of the coefficient of convective heat transfer along the surface of the Body on this process is investigated in detail. It turned out that its nonuniformity must be taken into account when solving problems of controlled heating for bodies with low thermal conductivity. An identification of the model parameters leads to results that are in good agreement with values from the literature for the experimental setup — a Cylindrical Body heated from both ends by two Peltier elements.
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Modeling and Identification of Cylindrical Bodies with Free Convection and Peltier Elements as Sources for Active Heating
2018 23rd International Conference on Methods & Models in Automation & Robotics (MMAR), 2018Co-Authors: Dmitri Knyazkov, Julia Kersten, Georgy Kostin, Harald Aschemann, Andreas RauhAbstract:The paper considers the modeling of active heating or natural cooling of a Cylindrical Body, - either vertically or horizontally arranged. The position dependency of the coefficient of convective heat transfer along the surface of the Body on this process is investigated in detail. It turned out that its nonuniformity must be taken into account when solving problems of controlled heating for bodies with low thermal conductivity. An identification of the model parameters leads to results that are in good agreement with values from the literature for the experimental setup - a Cylindrical Body heated from both ends by two Peltier elements.
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Influence of free convection on heat transfer in control problems for a Cylindrical Body
2017 22nd International Conference on Methods and Models in Automation and Robotics (MMAR), 2017Co-Authors: Dmitri Knyazkov, Georgy Kostin, Vasiliy SaurinAbstract:The paper considers influence of free convection on controlled heating or cooling of Cylindrical bodies. Horizontal and vertical alignments of the Body are studied. Free convection appears to be the main way of heat transfer for parameters of the considered experimental setup. An experiment of free cooling of a horizontal cylinder in ambient air has been performed. Its results are consistent with numerical estimations. Simulation of cylinder controlled heating shows that the non-uniformity of the heat transfer coefficient along the cylinder's surface can have considerable influence on the temperature at some critical points for materials with relatively small conductance.
