Effect of skin dielectric properties on the read range of epidermal ultra‐high frequency radio‐frequency identification tags

Abstract

This Letter presents an investigation of the effect of human tissue conductivity and permittivity on the performance of epidermal transfer tattoo ultra-high frequency radio-frequency identification (RFID) tags. The measurements were carried out on 20 individuals and the variations in the measured dielectric properties correlate well with variations in the measured tag read range on the individuals and to a lesser extent with their body mass index values. Simulation results also showed the effects of permittivity and conductivity on the designed resonance frequency of the RFID tag.

Adjustable Passive RFID Skin Mounted Sticker

“…It was expected that with increasing permittivity of body tissues (as seen between the volunteers), there would be a downward shift seen in resonant frequency (i.e. increase in permittivity leads to decrease in resonant frequency) if no adjustments were made to reduce the capacitive loading effect of the body [4]. Increasing the polyurethane thickness is a simple solution for reducing the tag and skin coupling effect (Fig.…”

“…Utilizing an etched LRC circuit RFID tag can further reduce the cost (no need for extra components as all components included in the antenna structure) while showing great potential for wearable applications due to the ability to overcome human tissue capacitive loading [3,4]. The present paper only exhibits the matching methods for developing a wearable dipole antenna that could be utilized in a future design as a self-sensing sensor due to the clear sensitivity to any dielectric change upon the attached target as this sensor design was based on our 865 MHz tuned version of [5].…”

Analysis, Design, and Manufacture of a Compact UHF RFID Tag Antenna for Operating in a Metallic or Non-Metallic Environments

“…The RFID system with allocated low frequency (125-134 kHz), high frequency (13.56 MHz), ultrahigh frequency (UHF) (860-960 MHz), and microwave frequency (2.45, 5.8, and 24 GHz) [5] has pulled attention for its variety of applications as of late. UHF-band RFID systems particularly provide long-range, faster reading and greater information storage capacity [6] than those operated in the lowand high-frequency (LF or HF) bands. For RFID UHF band, each country has its specific frequency band, i.e.…”

Study and design of wristband RFID antenna for healthcare applications

“…RFID operates in different frequency ranges; though the most sought range is the UHF one, because it offers many advantages such as long read range …”

“…RFID operates in different frequency ranges; though the most sought range is the UHF one, because it offers many advantages such as long read range. 4 In passive RFID systems, the communication between Reader and tag is implemented using backscattering technic. In this method, tag communicates with the reader by modulating the received signal and radiating it back to the reader.…”