A Narrow Cross-Section Pattern Reconfigurable Antenna Based on Active Meta-Surface Radome
Aimed at the problems that military unmanned aerial vehicle(UAV)data link communication is poor in anti-interference performance and weak in anti-captured capability,a narrow cross-section pattern-reconfigurable antenna is proposed based on an active meta-surface radome with excellent aerodynamic per-formance.The antenna is comprised of a broadband planar omnidirectional antenna,a narrow cross-section active meta-surface radome with excellent aerodynamic performance,and a dual-frequency impedance matching network.When all the diodes on the meta-surface radome are off(without bias voltage applied),the radome is in a fully transparent state,and the antenna operates in a broadband omnidirectional commu-nication mode.However,when specific diodes on the meta-surface radome are turned on,the correspond-ing area of the radome becomes fully shielded,and the antenna works in a dual-frequency directional com-munication mode.In this case,the impedance matching of the antenna is improved significantly by intro-ducing a dual-frequency impedance matching network.In the omnidirectional communication mode,the antenna exhibits a relative bandwidth of 44.6％,a maximum gain of 1.37 dBi,and an out-of-roundness of less than 2.5 dBi.In the directional mode,the dual-frequency antenna has upper and lower frequency bands of 1.4 GHz and 1.8 GHz,respectively,with relative bandwidths of 9.1％and 15.3％.The maxi-mum directional gain can reach 5.2 dBi.The proposed antenna offers the advantages of a narrow cross-sec-tion and low cost while allowing flexible switching between broadband omnidirectional communication mode and dual-frequency directional communication mode.The proposed antenna is expected to enhance the anti-interference and anti-capture performance of UAVs.
data link communicationpattern reconfigurable antennaactive meta-surface radomeimped-ance matchingunmanned aerial vehicle
万方数据
维普
