A Robust Wearable Unique-Logo Wideband Antenna for 5G Applications

In this paper, a unique logo antenna is proposed for the 5G applications, which can be used to monitor the body. The antenna was designed to mimic the shape of a unique logo. The overall size of the logo antenna is 20 × 20 × 1.6 mm
³
, which makes it the smallest logo up to date in the literature. It works on the 2.9-7.9 GHz, unlicensed future 5G band. In free space, the bandwidth (BW), the reflection coefficient (S
₁₁
), and the gain of 4.981 GHz, -27.32 dB, and 2.75 dBi were achieved, respectively. While on-body, the achievable values are 4.8099 GHz, -32 dB, and 5.0 dBi, respectively. The antenna showed an omnidirectional radiation pattern for off and on-body applications. The specific absorption rate (SAR) is limited to ≤ 2 W/KG in the full band. The simulated and measured results are nearly matched, except some measured results are changed due to the fabrication tolerance.