Summary
International Symposium on Antennas and Propagation
2008
Session Number:4C32
Session:
Number:4C32-2
A Finger-Ring Antenna for BAN and PAN applications
Yuichiro Shimizu, Nobuhiro Kuga,
pp.-
Publication Date:2008/10/27
Online ISSN:2188-5079
Summary:
“Body Area Network" or "Personal Area Network" is emerging technology to realize a ubiquitous society. In such a society, easy and seamless but highly secured wireless communication network should be established. Therefore several researchers are challenging to use human-body as a secured transmission line[1], where on-body antenna become an important device. The wristwatch communicator proposed by Itoh et.al. is one of the example[3]. It used 13.8MHz, where the antenna is used as just only an exciter of the human-body, and establishes a high-secured body centric channel mainly using a human-arm. It has been developed successfully; however, human-body must be excited using direct-grounding on the skin because of such low frequency operation, which might cause metal allergy of an operator. In ubiquitous world in the future, from other viewpoint, wristwatch might be too large and should be downsized such as a finger ring. In this paper, we discuss a possibility of small and wearable antenna applicable to fingerring size communicator. A modified gate-shape antenna and an inverted F antenna are proposed, and their characteristics are compared using FDTD-simulation. Both have an advantage that the structure can be designed to avoid metal-skin contact.