With the development of wireless technology and flexible electronics, flexible frequency reconfigurable antennas have been directly used as sensors to detect mechanical signals. As an important frequency reconfigurable antenna, microstrip antenna has been widely studied in the field of flexible and flexible electronics in recent years. However, the stretchability of microstrip antennas usually comes at the cost of reducing the conductivity of the radiated conductor. Here, we report a flexible force sensitive frequency reconfigurable microstrip antenna, which fabricated by silver fiber conductive fabric with a double-wire braided structure. In order to increase the detection of pressure, an elastic dielectric layer with a microhemispheric array was introduced into the microstrip antenna to extend the frequency band width of the reconfigurable antenna. The relative frequency of the antenna varied from 0% to −12.9%, and the sensing sensitivity was −1.9 kPa⁻¹. As potential applications, we demonstrate the use of a flexible frequency reconfigurable antenna base on stretchable conductive fabric as a strain sensor capable of measuring bending angle and movements of a human finger. The change in the resonance frequency with the externally applied tensile strain in this antenna design has a sensitivity of 3.448, manifesting a 4.19- and a 13.79-fold increase of sensitivity when compared to those in previous reports that used arched or both-planes serpentine rectangular microstrip antenna. This is of great significance for the application of wearable antenna in wireless mechanical sensing technology.

中文翻译：

---

基于可拉伸导电织物的柔性力敏频率可重构天线

随着无线技术和柔性电子技术的发展，柔性频率可重构天线被直接用作传感器来检测机械信号。微带天线作为一种重要的频率可重构天线，近年来在柔性柔性电子领域得到广泛研究。然而，微带天线的可伸缩性通常是以降低辐射导体的导电性为代价的。在这里，我们报告了一种柔性力敏频率可重构微带天线，它由具有双线编织结构的银纤维导电织物制成。为了增加检测压力，在微带天线中引入具有微半球阵列的弹性介质层，以扩展可重构天线的频带宽度。天线的相对频率在0%到-12.9%之间变化，传感灵敏度为-1.9 kPa^-1。作为潜在的应用，我们展示了使用基于可拉伸导电织物的灵活频率可重构天线作为能够测量弯曲角度和人手指运动的应变传感器。在这种天线设计中，共振频率随着外部施加的拉伸应变而发生的变化具有 3.448 的灵敏度，与之前使用拱形或双平面蛇形矩形的报告相比，灵敏度增加了 4.19 倍和 13.79 倍微带天线。这对于可穿戴天线在无线机械传感技术中的应用具有重要意义。