集群通信与无线局域网多天线共口径设计

Design of trunked communication and WLAN multiple antenna used share-aperture technology

针对地面集群无线电通信800 MHz频段和无线局域网5 GHz频段,融合共口径技术和多输入多输出技术设计了一种新颖四单元双模式天线,该无线局域网天线采用双层微带结构结合多输入多输出技术,实现高通信容量;集群通信天线采用单层空气微带结构结合贴片耦合馈电技术,并与无线局域网天线共口径设计,实现多天线小型化.仿真和测试结果表明：集群通信天线（驻波比小于2）的阻抗带宽为806～866 MHz,天线增益大于6 dBi;无线局域网天线的阻抗带宽为4.9～6.1 GHz,天线增益大于8 dBi;各天线间的端口隔离度大于22 dB,无线局域网天线的包络相关系数远小于0.01,满足多输入多输出天线的分集要求.

To cover terrestrial trunked radio（TETRA）communication of 800 MHz hand and wireless local area network（WLAN） of 5 GHz band, a new fourelement dual-mode antenna is designed based on the aperture-sharing technology and the multiple-input multiple-output（MIMO）technology. WLAN band ele- ment are used the stacked structure and MIMO technique to increase the communication capacity. TETRA band element is used the air microstrip antenna and excited fed by a coupling circle patchwhich sharing ap- erture with WLAN elements to realize the compact struture. The simulated and measured results show that the TETRA element impedance bandwidth（VSWR less than 2）is 806--866 MHz and the gains are o- ver 6 dBi; while the WLAN element impedance bandwidth is 4.9--6.1 GHz the gains are over 8 dBi. The port isolations are over 22 dB at both bands, furthermore, envelope correlation coefficients（ECCs）are less than 0. 01 which satisfies the MIMO antenna standard.