Title :
Battery-less wireless communication system through human body for in-vivo healthcare chip
Author :
Yamada, Tomohiro ; Uezono, Takumi ; Sugawara, Hirotaka ; Okada, Kenichi ; Masu, Kazuya ; Oki, Akio ; Horiike, Yasuhiro
Author_Institution :
Precision & Intelligence Lab., Tokyo Inst. of Technol., Yokohama, Japan
Abstract :
This paper proposes a battery-less wireless communication system for in-vivo healthcare chip. We measured attenuation characteristics through a human body equivalent for six frequencies. Measured attenuation of 13.56 MHz is 47 dB through 15 cm thickness of human body equivalent. It is too difficult to use the usual modulations under such low power consumption. Then, we implemented the proposed system using the 13-56 MHz band with pulse interval modulation (PIM). In the simulated result, 16 mV of output voltage can be obtained at the outside receiver when coupling factor is 0.1. We also investigate antenna structure, and a tablet structure is suitable for the proposed system.
Keywords :
attenuation measurement; biosensors; health care; millimetre wave antennas; pulse modulation; PIM; attenuation measurement; battery-less wireless communication; human body; in-vivo healthcare chip; pulse interval modulation; tablet antenna structure; Attenuation measurement; Biological system modeling; Energy consumption; Frequency measurement; Humans; Medical services; Pulse modulation; Semiconductor device measurement; Thickness measurement; Wireless communication;
Conference_Titel :
Silicon Monolithic Integrated Circuits in RF Systems, 2004. Digest of Papers. 2004 Topical Meeting on
Print_ISBN :
0-7803-8703-1
DOI :
10.1109/SMIC.2004.1398235