Performance Evaluation of A Sticker-Type UHF Antenna for Wearable EMI Sensor Application

One of the essential factors that should be taken in the design of wearable sensor is that the usage of sensor is in close proximity to the object. Therefore, the wearable sensor must consider the environmental requirement to be operable effectively. This paper focuses on the performance evaluation of a sticker-type antenna which is intended for wearable electromagnetic compatibility (EMI) sensor application. The proposed antenna which is designed to work at ultra high frequency (UHF) band is made of an aluminium foil as the radiator attached on a plastic mica sheet used as the host material. The total thickness is less than 0.1 mm, so that the antenna is flexible and wearable as well. Parametric studies are applied on the physical shape and dimension of proposed antenna to improve its radiation characteristics. Measured results of the antenna prototype have the resonant frequency of 975 MHz with the bandwidth characteristic covering desirable application. In spite of slightly difference between the measurement and simulation results, the proposed antenna is promising its feasibility for wearable EMI sensor application at UHF band.