CAJ | 학술논문

由电磁场的波动方程和边界条件建立了单负材料作为芯层的对称三层平板波导的模式本征方程，用图解法研究其色散特性。研究发现，单负介质波导不支持快波的传播，只支持表面波的传播。在负磁材料平板波导中只存在TE表面模，不存在TM表面模。分析了在负磁材料平板波导中TE模受磁导率的比值-μ2／μ1和波导参数的影响，给出了横向场分布图。在-μ2/μ1〈1时，偶对称只有TE0表面模存在，奇对称只有TE1表面模存在，高阶模式并不存在，且两种模式都没有低频截止；-μ2/μ1〉1时，TE1表面模始终不出现；TE0模的存在与否和波导参数有关，在一定条件下TE0模可出现双模并存。给出的结果可望对表面波器件的设计提供理论基础。
유전자장적파동방정화변계조건건립료단부재료작위심층적대칭삼층평판파도적모식본정방정，용도해법연구기색산특성。연구발현，단부개질파도불지지쾌파적전파，지지지표면파적전파。재부자재료평판파도중지존재TE표면모，불존재TM표면모。분석료재부자재료평판파도중TE모수자도솔적비치-μ2／μ1화파도삼수적영향，급출료횡향장분포도。재-μ2/μ1〈1시，우대칭지유TE0표면모존재，기대칭지유TE1표면모존재，고계모식병불존재，차량충모식도몰유저빈절지；-μ2/μ1〉1시，TE1표면모시종불출현；TE0모적존재여부화파도삼수유관，재일정조건하TE0모가출현쌍모병존。급출적결과가망대표면파기건적설계제공이론기출。
According to Maxwell equations and boundary conditions of electromagnetic field, the mode eigen equations are obtained in a three - layer symmetrical slab waveguide with single - negative material. The graphic method is used to study their mode dispersion characteristics of even and odd symmetric modes which propagate along the waveguide with negative magnetic permeability material as core layer. The results prove that only TEl surface waves can propagate in this waveguide system. The TE surface modes are affected by the ratio of magnetic permeability - μ2/μ1 and the guide parameters. When - μ2/μ1 〈 1 ,only TE0 and TE1 surface waves do exist, and the higher - order TE modes do not exist at all. When -μ2/μ1 〉 1, the TE1 mode does not exist either. The two TE0 surface modes with different propagation constants in the same frequency can coexist under a certain condition. These results might give a theoretical basis for designing of surface wave devices.