A four-port multi-input-multi-output (MIMO) antenna is designed for the WLAN access point applications. The prospective antenna consists of four double-layered printed dipole antennas (DLPDAs), where two elements are designed to resonate at a frequency of 2.45 GHz and the resonant frequency of the other two elements is 5.8 GHz. The resonant bandwidths of the DLPDAs are 24.7% (2.09–2.68 GHz) and 28.9% (4.73–6.33 GHz) at 2.45 GHz and 5.8 GHz, respectively. The proposed MIMO antenna is printed on the FR-4 substrate of size 45 mm × 60 mm × 1.6 mm. A decoupling network is introduced in the center of the proposed antenna to achieve high isolation between resonating elements. The decoupling arrangement is a combination of four metal strips and a circular loop that acts as a neutralization line. It opposes the direct coupling current and provides isolation of around 20.55 dB at 2.45 GHz and 33.08 dB at 5.8 GHz.

四端口多输入多输出（MIMO）天线专为WLAN接入点应用而设计。预期天线由四个双层印刷偶极子天线（DLPDA）组成，其中两个元件被设计为以2.45 GHz的频率谐振，而其他两个元件的谐振频率为5.8 GHz。DLPDA的谐振带宽在2.45 GHz和5.8 GHz时分别为24.7％（2.09–2.68 GHz）和28.9％（4.73–6.33 GHz）。拟议的MIMO天线被印在尺寸为45 mm×60 mm×1.6 mm的FR-4基板上。在拟议天线的中心引入了一个去耦网络，以实现谐振元件之间的高度隔离。去耦装置是四个金属条和一个用作中和线的圆形回路的组合。