The development of new wireless sensing devices could provide significant opportunities for medical and environmental applications. A planar inverted-F antenna (PIFA) is a typical antenna that is widely used in communications. Here, we report here a PIFA for chemical sensing of ion concentrations. When the ion concentration increases, the reflection coefficient of the antenna decreases accordingly. The PIFA sensor shows a linear detection range from 0.15 μM to 15 μM. We expect that this study could offer exciting opportunities for fundamental studies as well as applications of wireless antennas for chemical and biological sensing, and advance related healthcare and environmental applications.

新的无线传感设备的开发可以为医疗和环境应用提供重要的机会。平面倒F天线（PIFA）是一种广泛用于通信的典型天线。在这里，我们在这里报告用于离子浓度化学感应的PIFA。当离子浓度增加时，天线的反射系数相应降低。PIFA传感器的线性检测范围为0.15μM至15μM。我们希望这项研究可以为基础研究以及无线天线在化学和生物传感领域的应用提供激动人心的机会，并促进相关的医疗保健和环境应用。