Miniaturized decoupled slotted patch RFID tag antennas for wearable health care

Abstract

In this article, a couple of two‐layered RFID tag antenna designs exhibiting improved performance descriptors for on‐body applications are presented. The antennas are designed to operate in the microwave band (2.4–2.48 GHz) ensuring high data transmission rates ideal for real‐time subject monitoring applications. The radiating element of both the antennas is a slotted patch structure provisioned with a pair of T‐shaped slots realized on a commercial FR4 substrate. The augmentation of a systematic sequence of narrow comb‐like etchings into the design enhances the impedance bandwidth considerably. A high permittivity silicon layer embedded with the radiating patch provides resilience from the human body dielectric losses. A modified antenna design utilizing patch miniaturization technique, resulting in an overall footprint reduction by 32%, is also proposed. The designed tag antennas offer a gain of more than 1.8 dBi and an attractive read range greater than 6.8 m in the operating band.

Metamaterial inspired fabric antenna for wearable applications

“…Therefore, the SAR value of antenna alone and with MTM is investigated to ensure that the proposed design complies with a safety limit of the standards. Based on the guideline given by the FCC, the SAR should be less than 1.6 W/kg averaged over 1 g of human tissues . The same model aforementioned in Section 4.2 is employed for SAR investigation.…”

“…Thus, all of these applications can be implemented for monitoring with data reception or transmission or both, through the use of wearable antennas that do not force wearers to renounce their comfort regions. Furthermore, convenience, durability, functionality, usability, and safety have turned out to be critical parts of the wearable antenna …”

“…Furthermore, convenience, durability, functionality, usability, and safety have turned out to be critical parts of the wearable antenna. [1][2][3][4][5] Loading wearable antennas near the body is a challenging task to make the design highly efficient and robust, with low-profile features due to a high conductivity of the body which causes mismatch and lossy of the design. The impact of wearable antenna on human tissues can be described by the SAR [6][7][8] and compared with safety limits provided by the standards (FCC and ICNIRP) in order to insure that there is no impact to human body.…”

Miniaturized dual‐band slot antenna design for GPS, amateur radio and WLAN applications

“…Also various antenna miniaturization techniques have been addressed by different researchers in References . For the need of modern wireless communication, miniaturized dual‐band antennas are discussed in References .…”

Study and design of wristband RFID antenna for healthcare applications

“…For these performances, the UHF RFID technology is advisable to track people in indoor environment, for example, a hospital . ‐ …”