宽带低剖面微带滤波器天线设计

摘要

The paper presents a kind of micro‐strip filter antenna of broadband and low profile characteristics with om‐ni‐directional radiation characteristics .The coupling line is used for the connection of antenna and the sencod resonator of fil‐ter ,as the admittance converter .In the design ,the micro‐strip is not only the radiator ,but also the last stage resonator of band‐pass filter .Therefore ,the transmission loss of the filter to antenna is reduced .The designed antenna has the bandwidth of 25% ,low‐profile of 3 .5mm ,omni‐directional radiation pattern and a high band rejection .%论文设计了一种具有全向辐射特性的宽带低剖面微带滤波器天线。利用作为导纳变换器的耦合线，连接微带天线和滤波器的第二个谐振器。在该设计中，微带天线不仅是辐射器也是带通滤波器的最后一阶谐振器。因此，减少了滤波器与天线之间的传输损耗。该天线具有25％的阻抗带宽，3．5mm厚的低剖面，全向辐射方向图和高的带外抑制度。