一种频率可重构的多模式微带准八木天线

Frequency reconfigurable multi-mode microstrip quasi-Yagi antenna

[目的]针对舰载无线通信设备布局拥挤、干扰严重以及迫切需要天线功能重构的现状,提出一种跨波段频率可重构的微带准八木天线。[方法]首先,在准八木天线上加载PIN二极管,通过控制二极管的通断,实现多波段的多模式切换;然后,通过附着雪花式开口谐振环(SRR),以保证天线具有2个稳定的频率谐振点,以及稳定的辐射方位角。[结果]仿真和实测结果表明:该天线实现了C波段(5.77~7.10 GHz,7.40~7.56 GHz)和X波段(8.33~8.64 GHz,8.76~9.27 GHz)内的频率可重构;天线辐射方向图可以稳定地指向容性加载导通的方向;所有模式下的增益水平均大于5.7 dBi,且3 dB波束宽度的平均值约为102°。[结论]该微带准八木天线实现了天线的跨波段频率可重构和低误差波束偏转,有利于提高舰船系统频谱的利用率并避免多天线之间的耦合干扰。

[Objectives]With increasing congestion and interference facing shipborne wireless communication equipment,it is urgent for antennae functions to be reconstructed.This study proposes a microstrip QuasiYagi antenna with a continuously reconfigurable cross-band frequency function.[Methods]First,PIN diodes are loaded on the quasi-Yagi antenna,and multi-band multi-mode switching is realized by controlling turning the diodes on/off.Second,by attaching snowflake split-ring resonator(SRR),the antenna gains two stable frequency resonance points and a stable radiation azimuth.[Results]According to the simulation and measurement results,the antenna realizes frequency reconfiguration in the C-band(5.77–7.10 GHz and7.40–7.56 GHz)and X-band(8.33–8.64 GHz and 8.76–9.27 GHz).Its radiation pattern can stably point in the direction of capacitive loading conduction,with gain above 5.7 dBi at each frequency and an average 3 dB beamwidth value of 102°.[Conclusions]By loading PIN diodes on the antenna and attaching a snowflake SRR,cross-band frequency becomes frequency reconfigurable,and beam deflection with low error is achieved,thereby improving the spectral utilization of ship systems and avoiding coupling interference between multiple antennae.