Study of Ceramic Monopole Implantable Antenna without Superstrate

• Main Authors: Ying-Chih Li, 李穎智
• Other Authors: Hung-Chi Yang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/04424514026680880058

碩士 === 南台科技大學 === 電機工程系 === 97 === The main objective of this study is to design small size and broad bandwidth monopole implantable antennas operated in Medical Implant Communications Service (MICS) (402-405 MHz) band, which can be easily implanted into the human body. Moreover, its SAR value must be lower than 1.6 W/kg and radiation efficiency is enhanced. Recently, the microwave dielectric ceramic material become very popular antenna material due to its characteristics of high dielectric constant (εr), high quality factor (Q), temperature coefficient of stability (τf). In this paper, Ceramic (εr = 27.9) and Al2O3 (εr = 9.8) are utilized to be the substrates of the implantable antennas, and CPW-fed feed structure is adopted as the patterns of the proposed antennas. According to the characteristic of high dielectric, the size of the proposed antenna fabricated by Ceramic or Al2O3 has been shrunk. In addition, the simulations concerning the antennas implanted in the different tissues by software are discussed, and the characteristics about the proposed antennas coated with glue and without superstrate are also compared. Finally, the proposed antennas are experimented in the phantom fluid and pork, and the results are demonstrated in this paper as well. Keyword: CPW, Implantable antenna