| Novel 1-D Sandwich Photonic Bandgap Structure |
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| 作者姓名： | 庞云波 高葆新 |
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| 作者单位： | StateKeyLaboratoryonMicrowaveandDigitalCommunications,DepartmentofElectronicEngineering,TsinghuaUniversity,Beijing100084,China |
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| 摘 要： | A sandwich photonic bandgap (PBG) structure is a novel PBG structure whose periodic lattice is buried in the middle of a substrate. Neither drilling nor suspending the substrate is required, and the integrity of the ground plane is maintained. This paper presents several modification techniques for sandwich PBG structure fabrication. The forbidden gap can be improved by adopting the chirping technique, applying the tapering technique, enlarging the periodic elements, adjusting the location of the periodic lattice in the substrate, and using different dielectric media H-shape elements. A finite difference time domain method is applied to analyze the structures. Deep and wide stopbands can be obtained using the modified sandwich structures. Experimental measurement results agree well with the theoretical analysis.
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| 关 键 词： | 微波传输带 光子能带隙 电磁能带隙 有限差分时间域方法 周期格子 |
Novel 1-D Sandwich Photonic Bandgap Structure |
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| PANG Yunbo,GAO Baoxin State Key Laboratory on Microwave and Digital Communications.Novel 1-D Sandwich Photonic Bandgap Structure[J].Tsinghua Science and Technology,2004,9(2):227-233. |
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| Authors: | PANG Yunbo GAO Baoxin State Key Laboratory on Microwave and Digital Communications |
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| Institution: | PANG Yunbo,GAO Baoxin State Key Laboratory on Microwave and Digital Communications,Department of Electronic Engineering,Tsinghua University,Beijing 100084,China |
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| Abstract: | A sandwich photonic bandgap (PBG) structure is a novel PBG structure whose periodic lattice is buried in the middle of a substrate. Neither drilling nor suspending the substrate is required, and the integrity of the ground plane is maintained. This paper presents several modification techniques for sandwich PBG structure fabrication. The forbidden gap can be improved by adopting the chirping technique, applying the tapering technique, enlarging the periodic elements, adjusting the location of the periodic lattice in the sub-strate, and using different dielectric media H-shape elements. A finite difference time domain method is ap-plied to analyze the structures. Deep and wide stopbands can be obtained using the modified sandwich structures. Experimental measurement results agree well with the theoretical analysis. |
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| Keywords: | photonic bandgap finite difference time domain method microstrip |
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