用双重场匹配法分析GNRD波导介质带间隙的不连续性

ANALYSIS OF GNRD WAVEGUIDE DISCONTINUITY OF THE GAP IN DIELECTRIC STRIP USING THE DOUBLE FIELD-MATCHING METHOD

采用双重场匹配法，对ＧＮＲＤ波导的横截面分区，在分区界面用横向的场匹配法计算了波导的传输模和衰减模色散特性及其本征模表达式；并在间隙不连续处用纵向的场匹配法求该处的主模传输系数和反射系数．本文提供的数据可作为ＧＮＲＤ波导多级带通滤波器设计的依据．

he gap discontinuity of the dielectric strip in the GNRD is analyzed transversely and longitudinally by employing the field-matching method. At first,the dispersion characteristics of the propagating mode and the evanescent mode are discussed, then the curves of reflectivity with respect to the gap are given. Finally, the theoretical and experimental data are compared, and they are in agreement with each other.