摘要
提出一种新型小型化无线电高度表天线结构。天线采用两层微波电路复合而成,上层采用栅栏形状导体提高天线的线极化纯度,下层为2单元并联微带天线阵及馈电网络。应用此结构设计并实现了工作于4.3GHz频段的某小型飞行器高度表天线。仿真及实测结果表明,新型天线的微波电路占用空间为56mm×36mm×3mm,天线结构小于65mm×60mm×6mm(不含接头),3dB波束宽度为±33°×±37°,VSWR<2.0的相对带宽不小于4.5%,最大增益8dB。天线结构新颖紧凑,非常适用于小型飞行器平台。
A kind of novel compact antenna of radio altimeters based on bi-layer substrate is presented.The antenna is composed of bi-layer microwave circuits.The upper layer adopts palisade-shaped conductor to enhance the purity of linear polarization.The lower layer is a two-unit parallel-fed microstrip antenna array and its feeding network.Applying this structure,the radio altimeter antenna of a certain small-scale air vehicle working at 4.3GHz frequency is designed and fabricated.The simulation and test results indicate that the substrate of novel antenna has the size of 56mm×36mm×3mm,the structure of novel antenna has the size of 65mm×60mm×6mm(not including the connector),the 3dB wave beam width is ±33°×±37°,the VSWR<2.0 relative bandwidth is no less than 4.5% and the max gain is 8dB.The antenna has a novel and compact structure,and it has good adaptability to the small-scale air vehicle.
出处
《遥测遥控》
2013年第2期58-62,共5页
Journal of Telemetry,Tracking and Command
基金
航空科学基金支持项目(20090151005)
关键词
微带天线
小型化
高度表
线极化
Microstrip antenna
Compact
Radio altimeter
Linear polarization
