In this article, a compact dual‐port dual‐frequency slot antenna compatible with printed circuit board (PCB) technology is proposed. The antenna has two feed structures for two frequencies with slots and the capacitive matching circuits. The antenna radiates at specific frequency with the matching network and the frequency of the antenna can be adjustable by changing the matching element parameters. Taking the advantage of resonance by the subwavelength feed slots, the efficient radiation can be achieved at the outer ground edge of the PCB board, thus contributing to the excellent performance of gain and the good isolation between two frequency band paths. In consideration given to the wireless communication application bands, the antenna is designed to work at 1.57 and 2.4 GHz. The experimental radiation patterns show a unidirectional antenna with maximum radiation of 0.86 dBi in 171° direction at 1.57 GHz and maximum radiation of 5.2 dBi in 278° direction at 2.4 GHz, respectively. The proposed compact cost‐effective antenna demonstrates the potential of application in small multifrequency Internet of Things devices to drive WiFi, Bluetooth, and GPS.

中文翻译：

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双端口双频集成天线设计

本文提出了一种与印刷电路板（PCB）技术兼容的紧凑型双端口双频缝隙天线。天线具有两个带有缝隙和电容匹配电路的两个频率的馈电结构。天线以匹配网络的特定频率辐射，并且可以通过更改匹配元素参数来调整天线的频率。利用亚波长馈电槽的共振优势，可以在PCB板的外部接地边缘实现有效的辐射，从而有助于实现出色的增益性能和两个频带路径之间的良好隔离。考虑到无线通信应用频段，将天线设计为工作在1.57和2.4 GHz。实验辐射图显示了一个单向天线，在1.57 GHz时在171°方向上的最大辐射为0.86 dBi，在2.4 GHz下在278°方向上的最大辐射为5.2 dBi。拟议中的紧凑型高性价比天线展示了在小型多频物联网设备中用于驱动WiFi，蓝牙和GPS的潜力。