摘要
设计了一种可工作在共面波导和耦合槽线两种模式下的耦合渐变槽线天线,该天线采用双端口共面波导馈电。仿真和测试结果显示:"和"端口馈电时,5.8～7.7GHz的S11均小于-10dB,波束在最大辐射上均具有较好的极化纯度,交叉极化电平小于-25dB;"差"端口馈电时,S11在5GHz后,除个别频点外均小于-10dB,差波束在天线辐射方向上具有-20dB的零深,并随着工作频率增加,两个波瓣逐渐靠近,旁瓣电平逐渐降低,方向性更加明显。
A coupled tapered slot antenna is designed which can work on both coplanar waveguide（CPW） mode and coupled slotline mode. It is fed with two -port -CPW network. The simulated and measured results show that the S11 is below - 10 dB from 5.8 GHz to 7.7 GHz when fed in the sum port and the SH is almost below - 10 dB over 5 GHz except ve~＂ few frequencies around when fed in the difference port. Yet the sum pattern has relatively good polarized purity with the cross polarization lever below -25 dB at the main radiation direction over the operating band. The difference pattern has -20 dB lower null depth in the main radiation direction. And with the increase of the frequency, the two beams of the difference pattern are gradually closer, and the side lobe level is lower, and the direction is more obvious.
出处
《电讯技术》
北大核心
2010年第2期97-101,共5页
Telecommunication Engineering
关键词
多模天线
共面波导
和波束
差波束
multi - mode antenna
coplanar waveguide （CPW）
difference pattern
sum pattern
