ABSTRACT RFID tag antennas with stable performance on the diverse electromagnetic mounting platforms are an integral part of the ubiquitous RFID systems. This research article presents a novel tag antenna design that facilitates the said objective. The proposed antenna consists of a modified H-shaped slot structure that ensures considerable robustness from the application environment through confining the surface current density within the antenna structure. The antenna offers a tunable bandwidth of 40 MHz within the microwave band of (2.4–2.5) GHz. The proposed tag antenna exhibits excellent response on metallic platforms of different sizes and thicknesses with an effective gain of almost four times of that in free space. Furthermore, the designed tag antenna performs adequately well on low–medium permittivity dielectrics (glass, paper, and plastic) and RF absorbers (water). The free space and on-metal performance of the proposed tag antenna are verified by testing a prototype realized on the FR4 substrate.

中文翻译：

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专用于物联网应用的薄型微型 RFID 标签天线

摘要 RFID 标签天线在各种电磁安装平台上具有稳定的性能，是无处不在的 RFID 系统的组成部分。这篇研究文章提出了一种新颖的标签天线设计，有助于实现上述目标。所提出的天线由改进的 H 形缝隙结构组成，通过将表面电流密度限制在天线结构内，确保应用环境具有相当大的鲁棒性。该天线在 (2.4–2.5) GHz 的微波频段内提供 40 MHz 的可调带宽。所提出的标签天线在不同尺寸和厚度的金属平台上表现出出色的响应，有效增益几乎是自由空间的四倍。此外，设计的标签天线在中低介电常数电介质（玻璃、纸、和塑料）和射频吸收器（水）。通过测试在 FR4 基板上实现的原型，验证了所提出的标签天线的自由空间和金属性能。