Evaluation of Growing Skin Organoid Culture Utilizing RFID Tag

This paper proposes the initial design of an RFID tag working in the UHF band to monitor the growth of skin organoid cultures. The proposed tag consists of a meandered-line dipole antenna and a sensing element. An open ring resonator was embedded between two gelatin-based layers that mimic the upper and lower dermis of the skin organoid culture. The electrical properties of the gelatin layers were measured to ensure that they are equal to those of real skin and to validate the gelatin layers for the experiment. By increasing the thickness of the epidermal layer to simulate skin growth, variations in S11 were obtained, leading to changes in the input impedance. The realized gain of the designed tag was 0.6 dBi, with an efficiency of around 64%. The obtained results show the potential of using passive RFID tag technology for monitoring skin growth.