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A novel type of dual-mode square lattice photonic selectivity narrowband bandpass filters in the terahertz communication system. In order to design a high quality factor Q microcavity, the photonic bandgap is firstly calculated by using the PWE method. Secondly, the eigen-frequencies and EM fields of a point defect microcavity generating localized states in the bandgap are calculated by a supercell...
A simple quasi-elliptical-function-based design methodology is proposed for a class of ultra-wideband(UWB) filters consisting of stepped-impedance resonators (SIRs) based on parallel-coupled three-line, short-circuited stubs and two-section stepped-impedance open-circuited stubs. Furthermore, the influence of the location of the loaded stubs and the type of stubs applied to the filter characteristics...
This paper presents a new dual-mode bandpass filter using higher-order degenerate resonant modes of a square lattice photonic crystal microcavity in terahertz frequency band. In order to design a photonic crystal high-Q microcavity, the dispersion relations of photonic bandgap are firstly calculated by using the plane wave expansion method. Secondly, the transmission properties of photonic crystal...
This paper presents a new dual-mode bandpass filter using higher-order degenerate resonant modes of a square lattice photonic crystal microcavity in terahertz frequency band. In order to design a photonic crystal high-Q microcavity, the dispersion relations of photonic bandgap are firstly calculated by using the plane wave expansion method. Secondly, the transmission properties of photonic crystal...
The photonic crystal device is potentially important for sub-millimeter and terahertz applications and will induce new breakthrough in modern electromagnetic wave circuits. The propagation loss of photonic crystal waveguides with a strong confinement wall is a key factor in design and is related to the confinement of guided mode. The dispersion characteristics of the PhC structure are firstly calculated...
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