A low profile dual-band multiple-input-multiple-output (MIMO) antenna system is proposed. The proposed MIMO antenna consists of two low profile unbalanced fed inverted L antennas with parasitic elements to resonate at...A low profile dual-band multiple-input-multiple-output (MIMO) antenna system is proposed. The proposed MIMO antenna consists of two low profile unbalanced fed inverted L antennas with parasitic elements to resonate at 2.45 GHz and 5 GHz. The structure is uncomplicated by locating two ultra low profile inverted L antennas on the finite conducting plane. The proposed MIMO antenna is numerically and experimentally analyzed. When the size of conducting plane is 55 mm by 55 mm and the height of antenna is 9 mm, the directive gain of 4.11 dBi and the S11 bandwidth of 5.71% are achieved for lower frequency of 2.45 GHz. At the upper frequency of 5 GHz, the directive gain of 8.22 dBi and the S11 bandwidth of 6% are obtained. The proposed antenna has good diversity gain, shown by the correlation coefficient becomes less than 0.005 at the frequency of 2.45 GHz and 5 GHz band when the distance between inverted L elements is 41 mm. A good agreement between calculated and measured results is obtained. The results show that the weak mutual coupling of the proposed antenna and this feature enables it to cover the required bandwidths for WLAN operation at the 2.4 GHz band and 5 GHz band.展开更多
Two ultra low profile inverted L antennas located on the square conducting plane are numerically and experimentally analyzed as the multiple input multiple output (MIMO) antenna system. When the size of conducting pla...Two ultra low profile inverted L antennas located on the square conducting plane are numerically and experimentally analyzed as the multiple input multiple output (MIMO) antenna system. When the size of conducting plane is 0.45 λ by 0.45 λ and the height of antenna is 0.03 λ, the directive gain of 4.12 dBi and the return loss bandwidth of 3.67% are achieved. The proposed antenna has good diversity gain shown by the correlation coefficient, and becomes less than 0.02 at the frequency of 2.45 GHz band when the distance between inverted L elements is 0.33 λ. The results show the weak mutual coupling of the proposed antenna and its performances are promising as MIMO antenna applications.展开更多
针对无线通信系统中的多频段传输要求,设计了一种倒L型宽频带双频天线。通过在传统平面单极子天线的辐射振子上增加谐振枝节,形成两个倒L结构,获得能完全覆盖WLAN频段的宽频带双频天线。利用HFSS13.0电磁仿真软件,对天线进行参数仿真优...针对无线通信系统中的多频段传输要求,设计了一种倒L型宽频带双频天线。通过在传统平面单极子天线的辐射振子上增加谐振枝节,形成两个倒L结构,获得能完全覆盖WLAN频段的宽频带双频天线。利用HFSS13.0电磁仿真软件,对天线进行参数仿真优化分析。仿真结果表明,当S_(11)<-10 d B时,天线的工作频段分别为2.32~2.77 GHz,5.00~6.75GHz,相对带宽分别达到17.6%,29.8%,频率为2.4 GHz时增益为8.04 d Bi,5.2 GHz时为7.61 d Bi。相较于传统的平面单极子天线,该天线有更好的带宽、增益、辐射特性。展开更多
设计了一种倒L形枝节加载宽带圆极化缝隙天线。天线为单层矩形结构,采用共面波导（CPW）馈电,通过在馈线上端加载倒L形枝节和在环形接地面上加载T形枝节,实现了天线的宽阻抗带宽和宽轴比带宽特性。实测结果表明,S11≤-10 d B的阻抗带宽...设计了一种倒L形枝节加载宽带圆极化缝隙天线。天线为单层矩形结构,采用共面波导（CPW）馈电,通过在馈线上端加载倒L形枝节和在环形接地面上加载T形枝节,实现了天线的宽阻抗带宽和宽轴比带宽特性。实测结果表明,S11≤-10 d B的阻抗带宽达到115%（1.6～5.9 GHz）,轴比≤3 d B的圆极化带宽为48.3%（2.2～3.6GHz）。该天线结构简单、易于制作,具有较好的应用前景。展开更多
文摘A low profile dual-band multiple-input-multiple-output (MIMO) antenna system is proposed. The proposed MIMO antenna consists of two low profile unbalanced fed inverted L antennas with parasitic elements to resonate at 2.45 GHz and 5 GHz. The structure is uncomplicated by locating two ultra low profile inverted L antennas on the finite conducting plane. The proposed MIMO antenna is numerically and experimentally analyzed. When the size of conducting plane is 55 mm by 55 mm and the height of antenna is 9 mm, the directive gain of 4.11 dBi and the S11 bandwidth of 5.71% are achieved for lower frequency of 2.45 GHz. At the upper frequency of 5 GHz, the directive gain of 8.22 dBi and the S11 bandwidth of 6% are obtained. The proposed antenna has good diversity gain, shown by the correlation coefficient becomes less than 0.005 at the frequency of 2.45 GHz and 5 GHz band when the distance between inverted L elements is 41 mm. A good agreement between calculated and measured results is obtained. The results show that the weak mutual coupling of the proposed antenna and this feature enables it to cover the required bandwidths for WLAN operation at the 2.4 GHz band and 5 GHz band.
文摘Two ultra low profile inverted L antennas located on the square conducting plane are numerically and experimentally analyzed as the multiple input multiple output (MIMO) antenna system. When the size of conducting plane is 0.45 λ by 0.45 λ and the height of antenna is 0.03 λ, the directive gain of 4.12 dBi and the return loss bandwidth of 3.67% are achieved. The proposed antenna has good diversity gain shown by the correlation coefficient, and becomes less than 0.02 at the frequency of 2.45 GHz band when the distance between inverted L elements is 0.33 λ. The results show the weak mutual coupling of the proposed antenna and its performances are promising as MIMO antenna applications.
文摘针对无线通信系统中的多频段传输要求,设计了一种倒L型宽频带双频天线。通过在传统平面单极子天线的辐射振子上增加谐振枝节,形成两个倒L结构,获得能完全覆盖WLAN频段的宽频带双频天线。利用HFSS13.0电磁仿真软件,对天线进行参数仿真优化分析。仿真结果表明,当S_(11)<-10 d B时,天线的工作频段分别为2.32~2.77 GHz,5.00~6.75GHz,相对带宽分别达到17.6%,29.8%,频率为2.4 GHz时增益为8.04 d Bi,5.2 GHz时为7.61 d Bi。相较于传统的平面单极子天线,该天线有更好的带宽、增益、辐射特性。
文摘设计了一种倒L形枝节加载宽带圆极化缝隙天线。天线为单层矩形结构,采用共面波导（CPW）馈电,通过在馈线上端加载倒L形枝节和在环形接地面上加载T形枝节,实现了天线的宽阻抗带宽和宽轴比带宽特性。实测结果表明,S11≤-10 d B的阻抗带宽达到115%（1.6～5.9 GHz）,轴比≤3 d B的圆极化带宽为48.3%（2.2～3.6GHz）。该天线结构简单、易于制作,具有较好的应用前景。
