Abstract Multiband applications can be realized as a result of designing a double U-slot rectangular patch antenna. The equivalent circuit of a U-slot patch is presented and the return loss is theoretically derived, utilizing the [A] matrix formulation. CST Microwave Studio software was used to design the microstrip antenna with a transmission line feed and simulate return loss and radiation patterns. The antenna was fabricated in-house using a printed board CNC machine and was measured and compared for return loss using a portable network analyzer. The radiation patterns were measured using a laboratory antenna measurement system. The fabricated antenna was installed on a networked WiFi access point, and tested as far as average received power versus distance range. The antenna is simple, low-cost and easy to fabricate and measurements compared well with simulated results.

中文翻译：

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用于多频段应用的双 U 槽矩形贴片天线

摘要 设计双U型槽矩形贴片天线可以实现多频段应用。给出了 U 槽贴片的等效电路，并利用 [A] 矩阵公式从理论上推导出回波损耗。CST Microwave Studio 软件用于设计带有传输线馈电的微带天线，并模拟回波损耗和辐射方向图。天线是使用印制板 CNC 机器在内部制造的，并使用便携式网络分析仪测量和比较回波损耗。使用实验室天线测量系统测量辐射方向图。制造的天线安装在联网的 WiFi 接入点上，并就平均接收功率与距离范围进行了测试。天线很简单，