Development of Nonsuperstrate Implantable Low-Profile CPW-Fed Ceramic Antennas

作者：Chien Tsung Fu^*; Cheng Chien Min; Yang Hung Chi; Jiang Jian Wei; Luo Ching Hsing

来源：IEEE Antennas and Wireless Propagation Letters, 2010, 9: 599-602.

DOI：10.1109/LAWP.2010.2053342

• Ceramic substrate
• direct tissue loading
• implantable antenna
• nonsuperstrate

A broadband nonsuperstrate implantable CPW-fed monopole antenna operating at the Medical Implant Communication Service (MICS) frequency band (402 similar to 405 MHz) is developed on a microwave dielectric ceramic substrate with high dielectric constant and high quality factor. Compared to other similar implantable antennas covered with superstrates, the advantages of the proposed nonsuperstrate antenna are: miniaturization and low profile (approximate to 1 mm), wide measured bandwidth (>130 MHz/33.5%), deep measured S(11) (> -25 dB) at 402 MHz, and gain stability of 0.35 similar to 0.5 GHz. Furthermore, the measured S(11) is stable enough even for a period of 60 days. Therefore, the proposed antenna demonstrates the stable characteristics of direct contact tissue loading on a high-dielectric-constant ceramic substrate and is suitable for implanted biotelemetry applications.

• 出版日期2010