Research

An RFID Antenna Implanted In The Human Arm For Medical Applications

Authors:
  • Faculty of sciences of Tunisia
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Abstract

Today ,RFID systems, which are implanted in the body for the communication, cannot transmit medical data in several meters range[1]. in this section the aim is to study the implantable device systems activated for long range by transmitting the signal without electromagnetic thread

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Conference Paper
Radio Frequency Identification (RFID) is one of the developed technologies, which is used in several applications, including for medical field applications. For patient monitoring purpose, the RFID system is consisted of a medical tag that is implanted into the human body and a reader unit that is installed away from the human either in proximity or far away from the human body. By this communication system, it can reduce medical error, the risk of the tag being lost, and can be used for uncooperative patient. The monitoring device will be connected to the existing network (wireless LAN and so on) allowing to provide the mobility of patient, the physicians or caregivers can get easily patient's medical information without spending a lot of time via such a network connection. In this study, it will propose a tiny dipole antenna for RFID tag that will be implanted into the body following it is enclosed by a silica glass to reduce the radiation effects on the human body. The antenna is numerically simulated by using a human arm model in the frequency of 924 MHz according to the RFID band allocation in Indonesia. This study also investigates two other different surrounding environment of the antenna in order to precisely understand about the antenna characteristics, i.e. antenna placed in free space and enclosed in silica glass material. Each environment gives effects on the antenna's resonant frequency including its bandwidth. Following the simulation, the antenna is fabricated and validated by the basic measurement. This paper will show the current results of the antenna characteristics in free space environment in order to validate its basic manner. The antenna is relatively very small dimension compared to the band wavelength with good performances in S parameter, sufficient bandwidth, and omnidirectional radiation pattern.
Conference Paper
Nowadays, implanted medical devices that are using inductive coupling for communication, cannot be used for transmitting medical data in several meters range. This triggers us to study about implantable device systems in order for communications is enabled to be longer range by transmitting wirelessly electromagnetic signal. In this system, the external devices such as home monitoring device or portable equipment will provide the patient more mobility, and the patient or the health care provider could benefit from timely and ease of access to important patient medical information via a networked connection. Due to such advantages, small antennas for implantable devices are very important components in monitoring systems to provide wirelessly communication between a patient and an access point. This paper proposes a simple structure of a folded dipole antenna for an implantable device aimed at wireless patient monitoring applications. The implantable device is assumed to be used with a syringe injection, so the device can be simply embedded into the human body. The antenna is operated in UHF band 924 MHz, which is band of Indonesian frequency allocation for RFID applications. The antenna is small enough in this band with good performances such as S parameter, impedance bandwidth, radiation pattern and gain. The antenna has enough gain for more than 10m range communication with 250 MHz bandwidth (VSWR ≤ 1.5).
Article
Radio-frequency identification (RFID) is a growing technology, with the potential for reducing medical errors and improving the quality of healthcare in hospitals. The benefits include more secure and safe access in the healthcare environment (with the possibility, for example, to track patients, personnel, and equipment), as well as providing the means to easily identify patients and their medications with low risk of error. In this paper, we present an overview of the challenges faced in antenna design, electromagnetic modeling and wave propagation for RFID implants. The performance of ultra-high-frequency (UHF) subcutaneous tag antennas was investigated numerically and validated with measurements. Furthermore, the wave propagation between an off-body reader and an implanted tag was analyzed, in both free space and a scattered indoor environment. Results demonstrated that a passive tag solution allows a very limited communication range, due to the body losses, the electrically small size of the antenna, and nulls in the radiation pattern. In comparison, a maximum communication range of 10 m was predicted as achievable for an active tag operating indoors with a limited power (-20 dBm).
An Implanted Dipole Antenna for RFID-Based Patient Monitoring System Antennas and propagation of implanted RFIDs for pervasive healthcare applications
  • Canisius Sirait
  • F Basari
  • E Yuli Zulkifli
  • A Tjipto Rahardjo
  • M Sani
  • R Rajab
  • Y Foster
  • Hao
[2] : D.Canisius Sirait,Basari, F.Yuli zulkifli, E.Tjipto Rahardjo, " An Implanted Dipole Antenna for RFID-Based Patient Monitoring System ",Proceeding of IEEE,2013 [3]: A. Sani, M. Rajab, R. Foster and Y. Hao, " Antennas and propagation of implanted RFIDs for pervasive healthcare applications, " Proceedings of the IEEE, vol. 98, no. 9, pp. 1648–1655, Sep. 2010. [4]: Body Tissue Dielectric Parameter. Federal Communications Commission (FCC), USA. Available at http://transition.fcc.gov/oet/rfsafety/dielectric.html.