No abstract

The implantable medical devices (IMDs) are one of the most important advanced healthcare systems. Nowadays, the devices which are designed to monitor physiological data from inside the human body have great promises to provide major contributions to disease prevention, diagnosis and therapy thus reducing hospitalization terms and improving the patients' quality of life.It is recognized that modern wireless technology will play an important role in the biomedical application. Essential elements of implantable devices are antenna embedded in system contains Biosensors and interface circuits, which enable the exchange of data between implantable devices and external environment. In this paper, the implantable slot antenna which operates at MICS band (402-405 MHz) has been designed. This implantable antenna is a combination of meander slots and square spiral slots have been embedded for effective size reduction at a fixed frequency operation. Compared to traditional planar inverted-F antennas (PIFAs), the proposed antenna has advantages of good size reduction and also being easy to be optimized to the necessary resonance frequency. This design would fulfill the requirements of biocompatibility, miniaturization, patient safety, and high-quality communication with exterior equipment.

No abstract

No abstract

Wireless medical devices are used for monitoring a patient's health. These devices transmit patient's health data to external programming devices through communication links. Battery life is a significant issue with these wireless medical devices. This project proposes an energy harvesting system which scavenges energy from Radio Frequency (RF) electromagnetic spectrum and it is operated in GSM 900 band. In such systems, RF input energy is rectified using RF DC rectifier topologies. The RF-DC conversion is carried out using schottky diode. Impedance matching circuit is deployed between antenna and rectifier for maximum power transfer. The rectifying efficiency is found to be 72% for low input power. The proposed RF energy harvesting system is designed and simulated using Advanced Design System 2009 software.