研究目的
To analyze the double-ridge waveguide dominant mode using the FDTD-SVD method and compare the results with those obtained from Ansys HFSS.
研究成果
The FDTD-SVD method is effective for analyzing the single-mode operation bandwidth of double-ridge waveguides. Adding fillets improves the transmission performance of the waveguide.
研究不足
The method cannot provide the cutoff frequency and the propagation constant of the high order mode directly.
1:Experimental Design and Method Selection:
The FDTD-SVD method is used for mode analysis of double-ridge waveguides. This involves calculating field components in different xy planes at different frequencies and constructing an input matrix for SVD analysis.
2:Sample Selection and Data Sources:
Two types of double-ridge waveguides are analyzed: one without fillets and one with small fillets.
3:List of Experimental Equipment and Materials:
The simulation is performed using CFDTD with specific grid sizes.
4:Experimental Procedures and Operational Workflow:
The frequency domain field distribution is obtained for different xy planes, decomposed by SVD, and the dominant mode is analyzed.
5:Data Analysis Methods:
The amplitude of eigen modes is achieved by projecting the field to the best approximation of the eigen mode, and curve-fitting is used to obtain cutoff frequencies, attenuation constant, and propagation constant.
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