用于列车间直接通信的密距八木天线设计

The close yagi antenna design for direct communication between the trains

为一种新出现的列车间直接通信系统设计一个中心频率为150 MHz的高增益密距八木天线。结合列车间直接通信系统的特点,通过用八木天线理论、密距原理和折合振子理论,提出并设计了一种传统八木天线的改进形式——全折合振子型密距八木天线,运用遗传算法对其进行优化。最后利用HFSS仿真验证,得到一个尺寸明显缩小、电气性能指标满足设计要求的密距八木天线。

The paper is to design a high gain close Yagi antenna whose center frequency is 150 MHz for the train to train di- rect communication system. It puts forward and designs a antenna improved form of the traditional Yagi antenna-Full Fold Dipole Closely Spaced Yagi Antenna for it combined with the characteristics of direct communication system between trains by application of Yagi antenna theory, the close distance principle and the folded dipole theory. And it is optimized with genetic algorithm. Final- ly, we use HFSS simulating and get a closely spaced Yagi antenna whose size is reduced obviously and electrical performance in- dexes meet the design requirements.