摘要
研究了偶模耦合强于奇模的枝节加载双模滤波器,利用传输零点表达式推测了此类型双模滤波器的固有传输零点分布规律,然后通过各信号通路的相位关系推测了引入源与负载之间直接耦合(S-L Coupling)的附加传输零点的分布规律。最后利用矩阵理论验证了偶模耦合强于奇模的枝节加载双模滤波器4种情况的正确性。从而使枝节加载双模滤波器理论趋于完备。
A type of stub loaded dual-mode mierostrip filters is studied.The coupling between input/output line and even mode of the fillers is stronger than that of between input/output line anti odd mode.The rules of inherent transmission zero are studied by the express of transmission zero.The rules of the extra transmission zero are studied by the phase relation of all signal paths. Finally, four instances of this type of stub-loaded dual-mode filter are validated by the matrix theory.The research of this paper makes the stub-loaded dual-mode filter approach perfect.
出处
《无线电通信技术》
2015年第3期79-82,共4页
Radio Communications Technology
基金
国家自然科学基金项目(61308061)
