摘要
This paper presents an RF energy harvesting system for wireless intraocular pressure monitoring applications.The system consists of an implantable antenna and a rectifier.A new sizing strategy is adopted to optimize the conversion efficiency of the rectifier,and the design principle of an implantable antenna is introduced from material selection and structure design.Results from testing demonstrate that the antenna gain is about-20 dBi and the rectifier's maximum total conversion efficiency which contains match efficiency and rectifying efficiency is 47.18%under the implementation of0.18μm standard CMOS process.The maximum power obtained from the proposed system is 8μW when the power density of electromagnetic wave is lower than the national standard 40μW/cm^2 at915 MHz,which is enough to power the intraocular pressure monitoring system.
This paper presents an RF energy harvesting system for wireless intraocular pressure monitoring applications. The system consists of an implantable antenna and a rectifier. A new sizing strategy is adopted to optimize the conversion efficiency of the rectifier, and the design principle of an implant able antenna is introduced from material selection and structure design. Results from testing demon strate that the antenna gain is about 20 dBi and the rectifier＇ s maximum total conversion efficien cy which contains match efficiency and rectifying efficiency is 47.18% under the implementation of 0.18μm standard CMOS process. The maximum power obtained from the proposed system is 8μW when the power density of electromagnetic wave is lower than the national standard 40μW/cm2 at 915MHz, which is enough to power the intraocular pressure monitoring system.
基金
Supported by the Shanghai Science Committee Project(No.Y232821D01)
