A compact single fed circularly polarized dielectric resonator antenna (CPDRA) for off-body communication in wireless body area network (WBAN) applications is proposed. The proposed antenna consists of a modified rectangular DRA made of Al₂O₃ with a permittivity of ε_r = 9.8 and fed by a 50-Ω coaxial probe. Two unequal vertical slits are etched off from both the corner edges of the rectangular dielectric resonator to generate ${\mathit{TE}}_{\delta 11}^x$ and ${\mathit{TE}}_{1\delta 1}^y$ modes, and to reduce the overall size of the proposed antenna. Moreover, an efficient single layer equivalent phantom model is designed to reduce the simulation time for the analysis of off-WBAN communications. The proposed antenna is fabricated and characterized in free space as well as in on-body environment. It provides measured impedance and axial ratio (AR) bandwidths of 66.19% (4.72–9.39 GHz) and 15.01% (6.22–7.23 GHz) respectively in free space, 65.91% (4.73–9.38 GHz) and 16.02% (6.20–7.28 GHz) respectively in on-body environment. A full ground plane is used to provide unidirectional radiation pattern and greater isolation from the human body with low SAR i.e. 0.397 W/kg and 0.193 W/kg for 1 g and 10 g tissue respectively. These features make the proposed CPDRA is suitable for off-body communication and can easily be integrated in wireless devices.

提出了一种用于无线体域网 (WBAN) 应用中的离体通信的紧凑型单馈圆极化介质谐振器天线 (CPDRA)。所提出的天线由一个由 Al ₂ O ₃制成的改进的矩形 DRA 组成，其介电常数为 ε _r  = 9.8，并由 50 Ω 同轴探头馈电。从矩形介质谐振器的两个角边缘蚀刻掉两个不等的垂直狭缝以生成${\mathit{TE}}_{\delta 11}^X$ 和 ${\mathit{TE}}_{1\delta 1}^{是}$模式，并减少建议天线的整体尺寸。此外，设计了一种高效的单层等效幻影模型，以减少非 WBAN 通信分析的仿真时间。所提出的天线是在自由空间和身体环境中制造和表征的。它在自由空间中提供的测量阻抗和轴比 (AR) 带宽分别为 66.19% (4.72–9.39 GHz) 和 15.01% (6.22–7.23 GHz)、65.91% (4.73–9.38 GHz) 和 16.02% (6.20–7.28 GHz) ) 分别在身体环境中。全接地平面用于提供单向辐射模式和更大的人体隔离，具有低 SAR，即 1 g 和 10 g 组织分别为 0.397 W/kg 和 0.193 W/kg。