| Summary: | 碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 98 === The study of this thesis is to realize Composite Right/Left-Handed (CRLH) transmission line by using Complementary Split-Rings Resonators (CSRR). Applying this transmission feature to a passive circuit, an asymmetric fed structure of broadband bandpass filter with transmission zeros could be built with smaller size and better function. The designed small filter can be embedded in an antenna or other passive circuits, is expected to improve the overall performance of selectivity.
Ansoft High Frequency Structure Simulation (HFSS) and IE3D are applied for simulations with Finite Element Method (FEM). Transforming the calculation of S parameters through MATLAB, it can be show that the refractive index (n), permittivity (ε), and permeability (μ) are all negative with the feature of Metamaterial.
Deriving the equivalent circuit model of metamaterial bandpass filters from the equivalent material theory with the simulation software of Advanced Design System (ADS), Moment Method (MOM), and Momentum；We can accurately predict the S parameters with phase variations for left-handed materials further analysis and design.
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