矩形波导宽边纵向裂缝的分析

利用缝隙口面切向磁场连续的条件建立关于未知电场的联立积分方程,将波导内外部的互耦、波导壁厚及波导内高次模的影响全部考虑进去,然后运用矩量法求解得到一端短路和两端开路时的波导单缝中的电场分布。该结果与文献结果和HFSS仿真结果作比较,两者吻合良好,证明理论推导和编程计算的正确性。根据缝隙等效导纳和反射系数的关系计算波导一端短路时不同偏距纵缝的谐振长度,进行矩形端头与半圆端头的等效转化并给出了与仿真结果的比较。单个缝隙参数的确定为采用HFSS软件仿真法、等效电路法或场分析法进行波导裂缝阵列天线的分析和设计奠定了基础。

Analysis of Longitudinal Slots in Rectangular Waveguides

In this paper we have derived the simultaneous integral equations about unknown electric field based on the continuity of the tangential magnetic field on the slot of the waveguide,including the mutually coupling in the interior and exterior of the waveguide,finite waveguide wall thickness and the effect of the internal higher order mode coupling.Then we solve the electric field distribution in the single slot using the moment methods when the waveguide is feeded from one end and two ends.Compared with the literature result and the emulational result by HFSS software,the validity of the theoretical analysis and program calculation is proved.The resonant lengths with different offsets are calculated based on the relation of the equivalent shunt admittance and the reflection coefficient,rectangular end is transformed to rounded end.The confirmation of a single slot parameter have built up the bases for the analysis and design of multiple waveguide arrays of shunt slots using HFSS literature method,equivalent circuit method or field analysis method.