A high-efficiency antenna for in-ear wearable devices

抄録

This paper presents the design and evaluation of a compact dipole antenna optimized for ear-mounted devices, aiming to mitigate radiation efficiency loss caused by proximity to the human body. By analyzing current distribution, antenna orientation, and antenna size, it was found that placing the antenna perpendicular to the body, setting high-current regions away from the human body, and increasing the antenna size to reduce power absorption within the human body significantly improves efficiency. A novel “in-ear dipole antenna” was proposed and compared to a folded dipole design, achieving approximately 4dB improvement in radiation efficiency. These findings contribute to the development of high-performance wireless ear-worn devices with minimal interference from human body proximity.