The Experts below are selected from a list of 49575 Experts worldwide ranked by ideXlab platform

Ke Wu - One of the best experts on this subject based on the ideXlab platform.

  • investigations on the propagation characteristics of the substrate integrated waveguide based on the method of lines
    IEE Proceedings - Microwaves Antennas and Propagation, 2005
    Co-Authors: Wei Hong, Ke Wu
    Abstract:

    A rigorous full-wave approach based on the method of lines (MoL) is presented to analyse the propagation characteristics of substrate integrated waveguides (SIWs), in which a generalised Matrix Eigenvalue equation is derived instead of the conventional transcend equation, greatly improving the computing efficiency. The use of an efficient Z-transform absorbing boundary condition (Z-ABC) further improved the accuracy of the calculated propagation constants. Finally, two empirical equations are proposed for the propagation constants of SIWs, which gives a simple but efficient tool in designing substrate integrated waveguide components.

  • finite difference frequency domain algorithm for modeling guided wave properties of substrate integrated waveguide
    IEEE Transactions on Microwave Theory and Techniques, 2003
    Co-Authors: Feng Xu, Yulin Zhang, Wei Hong, Ke Wu
    Abstract:

    In multilayer microwave integrated circuits such as low-temperature co-fired ceramics or multilayered printed circuit boards, waveguide-like structures can be fabricated by using periodic metallic via-holes referred to as substrate integrated waveguide (SIW). Such SIW structures can largely preserve the advantages of conventional rectangular waveguides such as high-Q factor and high power capacity. However, they are subject to leakage due to periodic gaps, which potentially results in wave attenuation. Therefore, such a guided-wave modeling problem becomes a very complicated complex Eigenvalue problem. Since the SIW are bilaterally unbounded, absorbing boundary conditions should be deployed in numerical algorithms. This often leads to a difficult complex root-extracting problem of a transcend equation. In this paper, we present a novel finite-difference frequency-domain algorithm with a perfectly matched layer and Floquet's theorem for the analysis of SIW guided-wave problems. In this scheme, the problem is converted into a generalized Matrix Eigenvalue problem and finally transformed to a standard Matrix Eigenvalue problem that can be solved with efficient subroutines available. This approach has been validated by experiment.

Wei Hong - One of the best experts on this subject based on the ideXlab platform.

  • investigations on the propagation characteristics of the substrate integrated waveguide based on the method of lines
    IEE Proceedings - Microwaves Antennas and Propagation, 2005
    Co-Authors: Wei Hong, Ke Wu
    Abstract:

    A rigorous full-wave approach based on the method of lines (MoL) is presented to analyse the propagation characteristics of substrate integrated waveguides (SIWs), in which a generalised Matrix Eigenvalue equation is derived instead of the conventional transcend equation, greatly improving the computing efficiency. The use of an efficient Z-transform absorbing boundary condition (Z-ABC) further improved the accuracy of the calculated propagation constants. Finally, two empirical equations are proposed for the propagation constants of SIWs, which gives a simple but efficient tool in designing substrate integrated waveguide components.

  • finite difference frequency domain algorithm for modeling guided wave properties of substrate integrated waveguide
    IEEE Transactions on Microwave Theory and Techniques, 2003
    Co-Authors: Feng Xu, Yulin Zhang, Wei Hong, Ke Wu
    Abstract:

    In multilayer microwave integrated circuits such as low-temperature co-fired ceramics or multilayered printed circuit boards, waveguide-like structures can be fabricated by using periodic metallic via-holes referred to as substrate integrated waveguide (SIW). Such SIW structures can largely preserve the advantages of conventional rectangular waveguides such as high-Q factor and high power capacity. However, they are subject to leakage due to periodic gaps, which potentially results in wave attenuation. Therefore, such a guided-wave modeling problem becomes a very complicated complex Eigenvalue problem. Since the SIW are bilaterally unbounded, absorbing boundary conditions should be deployed in numerical algorithms. This often leads to a difficult complex root-extracting problem of a transcend equation. In this paper, we present a novel finite-difference frequency-domain algorithm with a perfectly matched layer and Floquet's theorem for the analysis of SIW guided-wave problems. In this scheme, the problem is converted into a generalized Matrix Eigenvalue problem and finally transformed to a standard Matrix Eigenvalue problem that can be solved with efficient subroutines available. This approach has been validated by experiment.

Feng Xu - One of the best experts on this subject based on the ideXlab platform.

  • finite difference frequency domain algorithm for modeling guided wave properties of substrate integrated waveguide
    IEEE Transactions on Microwave Theory and Techniques, 2003
    Co-Authors: Feng Xu, Yulin Zhang, Wei Hong, Ke Wu
    Abstract:

    In multilayer microwave integrated circuits such as low-temperature co-fired ceramics or multilayered printed circuit boards, waveguide-like structures can be fabricated by using periodic metallic via-holes referred to as substrate integrated waveguide (SIW). Such SIW structures can largely preserve the advantages of conventional rectangular waveguides such as high-Q factor and high power capacity. However, they are subject to leakage due to periodic gaps, which potentially results in wave attenuation. Therefore, such a guided-wave modeling problem becomes a very complicated complex Eigenvalue problem. Since the SIW are bilaterally unbounded, absorbing boundary conditions should be deployed in numerical algorithms. This often leads to a difficult complex root-extracting problem of a transcend equation. In this paper, we present a novel finite-difference frequency-domain algorithm with a perfectly matched layer and Floquet's theorem for the analysis of SIW guided-wave problems. In this scheme, the problem is converted into a generalized Matrix Eigenvalue problem and finally transformed to a standard Matrix Eigenvalue problem that can be solved with efficient subroutines available. This approach has been validated by experiment.

Yulin Zhang - One of the best experts on this subject based on the ideXlab platform.

  • finite difference frequency domain algorithm for modeling guided wave properties of substrate integrated waveguide
    IEEE Transactions on Microwave Theory and Techniques, 2003
    Co-Authors: Feng Xu, Yulin Zhang, Wei Hong, Ke Wu
    Abstract:

    In multilayer microwave integrated circuits such as low-temperature co-fired ceramics or multilayered printed circuit boards, waveguide-like structures can be fabricated by using periodic metallic via-holes referred to as substrate integrated waveguide (SIW). Such SIW structures can largely preserve the advantages of conventional rectangular waveguides such as high-Q factor and high power capacity. However, they are subject to leakage due to periodic gaps, which potentially results in wave attenuation. Therefore, such a guided-wave modeling problem becomes a very complicated complex Eigenvalue problem. Since the SIW are bilaterally unbounded, absorbing boundary conditions should be deployed in numerical algorithms. This often leads to a difficult complex root-extracting problem of a transcend equation. In this paper, we present a novel finite-difference frequency-domain algorithm with a perfectly matched layer and Floquet's theorem for the analysis of SIW guided-wave problems. In this scheme, the problem is converted into a generalized Matrix Eigenvalue problem and finally transformed to a standard Matrix Eigenvalue problem that can be solved with efficient subroutines available. This approach has been validated by experiment.

Patrick A Naylor - One of the best experts on this subject based on the ideXlab platform.

  • second order sequential best rotation algorithm with householder reduction for polynomial Matrix Eigenvalue decomposition
    International Conference on Acoustics Speech and Signal Processing, 2019
    Co-Authors: Vincent W Neo, Patrick A Naylor
    Abstract:

    The Second-order Sequential Best Rotation (SBR2) algorithm, used for Eigenvalue Decomposition (EVD) on para-Hermitian polynomial matrices typically encountered in wideband signal processing applications like multichannel Wiener filtering and channel coding, involves a series of delay and rotation operations to achieve diagonalisation. In this paper, we proposed the use of Householder transformations to reduce polynomial matrices to tridiagonal form before zeroing the dominant element with rotation. Similar to performing Householder reduction on conventional matrices, our method enables SBR2 to converge in fewer iterations with smaller order of polynomial Matrix factors because more off-diagonal Frobenius-norm (F-norm) could be transferred to the main diagonal at every iteration. A reduction in the number of iterations by 12.35% and 0.1% improvement in reconstruction error is achievable.