Title :
Dosimetry Using a Localized Exposure System in the Millimeter-Wave Band for in vivo Studies on Ocular Effects
Author :
Sasaki, Kazuhiko ; Sakai, Tadashi ; Nagaoka, T. ; Wake, Kanako ; Watanabe, Shigetaka ; Kojima, Masaru ; Hasanova, Nailia ; Sasaki, Hiromu ; Sasaki, Kazuhiko ; Suzuki, Yuya ; Taki, Masato ; Kamimura, Yoshitsugu ; Hirata, Akihiko ; Shirai, Hiroshi
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Koganei, Japan
Abstract :
We developed a millimeter-wave (MMW) exposure system for in vivo experiments for operating frequencies ranging from 24.5 to 95 GHz. The MMWs are localized to the rabbit ocular tissue with a spot-focus lens antenna. The MMW energy absorption and consequent temperature elevation are evaluated by numerical simulation using measured antenna distribution and precisely modeled rabbit ocular data. Results suggest that corneal damage occurs at an incident power density of 300 mW/cm2 with our exposure system at frequencies from 26.5 to 95 GHz.
Keywords :
biological effects of microwaves; biological tissues; dosimetry; eye; MMW energy absorption; corneal damage; dosimetry; frequency 24.5 GHz to 95 GHz; in vivo studies; localized exposure system; measured antenna distribution; millimeter-wave band; numerical simulation; ocular effects; power density; rabbit ocular tissue; spot-focus lens antenna; temperature elevation; Antenna measurements; Cornea; Density measurement; In vivo; Lenses; Power system measurements; Rabbits; Biological effects; dosimetric evaluation and exposure system; finite difference time domain (FDTD); localized exposure; millimeter waves (MMWs);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2014.2323011
