The Experts below are selected from a list of 7251 Experts worldwide ranked by ideXlab platform
Ying Wang - One of the best experts on this subject based on the ideXlab platform.
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hybrid models for effective design and optimization of large scale multiplexing networks
IEEE Transactions on Microwave Theory and Techniques, 2013Co-Authors: Ying Wang, Shuqi Li, Ming YuAbstract:In this paper, hybrid models for the design and optimization of large-scale Multiplexers are presented. First, analysis based on the low-pass prototype filter circuit model proves that the first cavity of a channel filter next to the manifold is critical in the design of Multiplexers. A hybrid model is proposed, combining a circuit model and the electromagnetic (EM) analysis of the coupling junction close to the manifold. The fact that only a single junction requires EM simulation facilitates the introduction of neural networks to multiplexer design for the first time. Another format of the hybrid model is then built by replacing the EM simulation with a neural model for the output coupling to the first resonator. The efficiency of the method is demonstrated using a six-channel multiplexer and a 13-channel multiplexer. Responses predicted by the hybrid models agree well with full EM simulations and measurement results. The proposed hybrid models are proven to be able to provide a high degree of accuracy in both in-band and out-of-band frequency ranges and fast, enabling iterative optimization involving all design parameters for large-scale Multiplexers.
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em based design of large scale dielectric resonator filters and Multiplexers by space mapping
IEEE Transactions on Microwave Theory and Techniques, 2004Co-Authors: M A Ismail, D Smith, Antonio Panariello, Ying Wang, Ming YuAbstract:A novel design methodology for filter and multiplexer design is presented. For the first time, finite-element electromagnetic (EM)-based simulators and space-mapping optimization are combined to produce an accurate design for manifold-coupled output Multiplexers with dielectric resonator (DR) loaded raters. Finite-element EM-based simulators are used as a fine model of each multiplexer channel, and a coupling matrix representation is used as a coarse model. Fine details such as tuning screws are included in the fine model. The DR filter and multiplexer design parameters are kept bounded during optimization. The sparsity of the mapping between the design parameters and the coupling elements has been exploited. Our approach has been used to design large-scale output Multiplexers and it has significantly reduced the overall tuning time compared to traditional techniques. The technique is illustrated through design of a five-pole DR filter and a ten-channel output multiplexer.
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em based design of large scale dielectric resonator filters and Multiplexers by space mapping
IEEE Transactions on Microwave Theory and Techniques, 2004Co-Authors: M A Ismail, Antonio Panariello, David R Smith, Ying WangAbstract:A novel design methodology for filter and multiplexer design is presented. For the first time, finite-element electromagnetic (EM)-based simulators and space-mapping optimization are combined to produce an accurate design for manifold-coupled output Multiplexers with dielectric resonator (DR) loaded raters. Finite-element EM-based simulators are used as a fine model of each multiplexer channel, and a coupling matrix representation is used as a coarse model. Fine details such as tuning screws are included in the fine model. The DR filter and multiplexer design parameters are kept bounded during optimization. The sparsity of the mapping between the design parameters and the coupling elements has been exploited. Our approach has been used to design large-scale output Multiplexers and it has significantly reduced the overall tuning time compared to traditional techniques. The technique is illustrated through design of a five-pole DR filter and a ten-channel output multiplexer.
Ming Yu - One of the best experts on this subject based on the ideXlab platform.
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hybrid models for effective design and optimization of large scale multiplexing networks
IEEE Transactions on Microwave Theory and Techniques, 2013Co-Authors: Ying Wang, Shuqi Li, Ming YuAbstract:In this paper, hybrid models for the design and optimization of large-scale Multiplexers are presented. First, analysis based on the low-pass prototype filter circuit model proves that the first cavity of a channel filter next to the manifold is critical in the design of Multiplexers. A hybrid model is proposed, combining a circuit model and the electromagnetic (EM) analysis of the coupling junction close to the manifold. The fact that only a single junction requires EM simulation facilitates the introduction of neural networks to multiplexer design for the first time. Another format of the hybrid model is then built by replacing the EM simulation with a neural model for the output coupling to the first resonator. The efficiency of the method is demonstrated using a six-channel multiplexer and a 13-channel multiplexer. Responses predicted by the hybrid models agree well with full EM simulations and measurement results. The proposed hybrid models are proven to be able to provide a high degree of accuracy in both in-band and out-of-band frequency ranges and fast, enabling iterative optimization involving all design parameters for large-scale Multiplexers.
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em based design of large scale dielectric resonator filters and Multiplexers by space mapping
IEEE Transactions on Microwave Theory and Techniques, 2004Co-Authors: M A Ismail, D Smith, Antonio Panariello, Ying Wang, Ming YuAbstract:A novel design methodology for filter and multiplexer design is presented. For the first time, finite-element electromagnetic (EM)-based simulators and space-mapping optimization are combined to produce an accurate design for manifold-coupled output Multiplexers with dielectric resonator (DR) loaded raters. Finite-element EM-based simulators are used as a fine model of each multiplexer channel, and a coupling matrix representation is used as a coarse model. Fine details such as tuning screws are included in the fine model. The DR filter and multiplexer design parameters are kept bounded during optimization. The sparsity of the mapping between the design parameters and the coupling elements has been exploited. Our approach has been used to design large-scale output Multiplexers and it has significantly reduced the overall tuning time compared to traditional techniques. The technique is illustrated through design of a five-pole DR filter and a ten-channel output multiplexer.
M A Ismail - One of the best experts on this subject based on the ideXlab platform.
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em based design of large scale dielectric resonator filters and Multiplexers by space mapping
IEEE Transactions on Microwave Theory and Techniques, 2004Co-Authors: M A Ismail, D Smith, Antonio Panariello, Ying Wang, Ming YuAbstract:A novel design methodology for filter and multiplexer design is presented. For the first time, finite-element electromagnetic (EM)-based simulators and space-mapping optimization are combined to produce an accurate design for manifold-coupled output Multiplexers with dielectric resonator (DR) loaded raters. Finite-element EM-based simulators are used as a fine model of each multiplexer channel, and a coupling matrix representation is used as a coarse model. Fine details such as tuning screws are included in the fine model. The DR filter and multiplexer design parameters are kept bounded during optimization. The sparsity of the mapping between the design parameters and the coupling elements has been exploited. Our approach has been used to design large-scale output Multiplexers and it has significantly reduced the overall tuning time compared to traditional techniques. The technique is illustrated through design of a five-pole DR filter and a ten-channel output multiplexer.
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em based design of large scale dielectric resonator filters and Multiplexers by space mapping
IEEE Transactions on Microwave Theory and Techniques, 2004Co-Authors: M A Ismail, Antonio Panariello, David R Smith, Ying WangAbstract:A novel design methodology for filter and multiplexer design is presented. For the first time, finite-element electromagnetic (EM)-based simulators and space-mapping optimization are combined to produce an accurate design for manifold-coupled output Multiplexers with dielectric resonator (DR) loaded raters. Finite-element EM-based simulators are used as a fine model of each multiplexer channel, and a coupling matrix representation is used as a coarse model. Fine details such as tuning screws are included in the fine model. The DR filter and multiplexer design parameters are kept bounded during optimization. The sparsity of the mapping between the design parameters and the coupling elements has been exploited. Our approach has been used to design large-scale output Multiplexers and it has significantly reduced the overall tuning time compared to traditional techniques. The technique is illustrated through design of a five-pole DR filter and a ten-channel output multiplexer.
Nicolas K Fontaine - One of the best experts on this subject based on the ideXlab platform.
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mode division multiplexed optical transmission enabled by all fiber mode multiplexer
Optics Express, 2014Co-Authors: Sun Hyok Chang, Nicolas K Fontaine, Hwan Seok Chung, Kyung Jun ParkAbstract:Mode division multiplexed optical transmission enabled by all-fiber mode multiplexer is investigated. The proposed all-fiber mode multiplexer is composed of consecutive mode selective couplers. It multiplexes or demultiplexes LP01, LP11, LP21, and LP02 modes simultaneously. We demonstrate successful transmission of three spatial modes with 120 Gb/s PDM-QPSK signals over 15 km of four mode fiber by using 6x6 MIMO digital signal processing.
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mode selective photonic lanterns for space division multiplexing
Optics Express, 2014Co-Authors: Sergio G Leonsaval, Nicolas K Fontaine, Joel R Salazargil, Burcu Ercan, Roland Ryf, Joss BlandhawthornAbstract:We demonstrate a 3x1 fiber-based photonic lantern spatial-multiplexer with mode-selectivity greater than 6 dB and transmission loss of less than 0.3 dB. The total insertion loss of the mode-selective Multiplexers when coupled to a graded-index few-mode fiber was < 2 dB. These mode Multiplexers showed mode-dependent loss below 0.5 dB. To our knowledge these are the lowest insertion and mode-dependent loss devices, which are also fully compatible with conventional few-mode fiber technology and broadband operation.
Kyung Jun Park - One of the best experts on this subject based on the ideXlab platform.
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mode division multiplexed optical transmission enabled by all fiber mode multiplexer
Optics Express, 2014Co-Authors: Sun Hyok Chang, Nicolas K Fontaine, Hwan Seok Chung, Kyung Jun ParkAbstract:Mode division multiplexed optical transmission enabled by all-fiber mode multiplexer is investigated. The proposed all-fiber mode multiplexer is composed of consecutive mode selective couplers. It multiplexes or demultiplexes LP01, LP11, LP21, and LP02 modes simultaneously. We demonstrate successful transmission of three spatial modes with 120 Gb/s PDM-QPSK signals over 15 km of four mode fiber by using 6x6 MIMO digital signal processing.
