Nasiri Shehni Paria, Mehranpour Mehdi
Appl Opt. 2025 Mar 10;64(8):2002-2008. doi: 10.1364/AO.550967.
This paper presents the design of a multi-beam reflectarray antenna sensor for medical and biosensing applications. The design incorporates a microstrip antenna with a rectangular graphene patch to feed the reflectarray antenna. This array antenna includes 76 rectangular graphene sheets placed beneath a substrate and atop an analyte substrate layer for environmental sensing. The key innovation lies in the creation of a directional multi-beam antenna. By adjusting the graphene's chemical potential, the antenna can radiate in multiple directions, enhancing channel capacity. The reflection spectra are obtained for several graphene chemical potentials, and the refractive index of the structure's sensing layer is in the range of 1.1-1.6. The antenna operates at a specific frequency band between 1.03 and 2.38 THz, at best, equal to 79% of the fractional bandwidth. It is shown that a sensitivity of 0.18 THz/RIU is achieved at a refractive index of 1.5 and a chemical potential of state 2.
本文介绍了一种用于医学和生物传感应用的多波束反射阵列天线传感器的设计。该设计采用了一个带有矩形石墨烯贴片的微带天线来馈电反射阵列天线。这个阵列天线包括76个矩形石墨烯片，放置在一个基板下方和一个用于环境传感的分析物基板层上方。关键创新在于创建了一个定向多波束天线。通过调整石墨烯的化学势，天线可以在多个方向上辐射，提高信道容量。获得了几种石墨烯化学势下的反射光谱，结构传感层的折射率在1.1 - 1.6范围内。该天线在1.03至2.38太赫兹的特定频段工作，最佳情况下等于79%的分数带宽。结果表明，在折射率为1.5和状态2的化学势下，实现了0.18太赫兹/RIU的灵敏度。
