研究目的
To generalize the original results of theoretical and experimental studies on the properties of microwave one-dimensional waveguide photonic crystals, describe methods for their electrodynamic characteristics, investigate new types of microwave photonic crystals, and analyze their control and applications.
研究成果
The chapter presents a comprehensive analysis of one-dimensional microwave photonic crystals, highlighting their unique properties, control mechanisms, and applications. The study demonstrates the potential of these crystals in measuring material parameters, serving as resonators in near-field microwave microscopes, and functioning as small-sized matched loads. The research underscores the importance of further exploration into the optimization and application of microwave photonic crystals in various fields.
研究不足
Technical constraints include the imperfection of waveguide walls affecting experimental results. Application constraints involve the need for compactness in devices based on microwave photonic crystals. Potential areas for optimization include the control of amplitude-frequency characteristics and the reduction of longitudinal dimensions.
1：Experimental Design and Method Selection:
Theoretical analysis and experimental investigation of one-dimensional microwave photonic crystals based on rectangular waveguides. Methods include the scattering matrix method and the finite element method in CAD ANSYS HFSS for numerical simulation.
2：Sample Selection and Data Sources:
Structures in the form of alternating layers with high and low dielectric permittivity, dielectric matrices with air inclusions, and periodically alternating elements that are sources of higher type waves.
3：List of Experimental Equipment and Materials:
Agilent PNA-L Network Analyzer N5230A for measurements, materials include ceramics (Al2O3), polystyrene, Teflon, and polycrystalline yttrium-iron garnet (YIG).
4：Experimental Procedures and Operational Workflow:
Measurement of reflection and transmission coefficients of microwave radiation interacting with photonic crystals, creation of periodicity disturbances, and control of characteristics by electric and magnetic fields.
5：Data Analysis Methods:
Calculation of reflection and transmission coefficients using wave transfer matrices, solution of inverse problems using the least squares method.
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