| The development of implantable medical devices (IMDs) is very fast. IMDs arewidely used in treatment and diagnosis in medical services. With the microelectronicstechnological advancements of microelectronics, the circuit inside devices arebecoming smaller and smaller. This put forward a problem in design antenna insidedevices which are used to keep communication with outer medical equipment.Researchers need to design antenna working efficiently in the limited space.Chapter1introduced the application background of implantable antenna, and itseffect in IMDs. In chapter2, basic knowledge of antenna was introduced includingworking parameters, and how the microstrip antenna works. The chapter3detailsresearch status and design method of antenna, especially some methods and theireffect for microstrip antenna’s miniaturization. Chapter4proposed three PIFAsworking at MICS band (402MHz~405MHz) adopting some miniaturizationtechniques. Antennas’ parameter model and corresponding human tissue model arebuilt with HFSS software based on the finite element method (FEM). The emphasis isthe analysis of the relation between antenna structure parameters and the performanceincluding resonance curves, far field gain, input impedance, impedance bandwidth,radiation pattern, and max far field gain value. To ensure the safety of human bodyupon the radiation, SAR value and its distribution is investigated, supply power whichmeet safety standard is computed. In chapter5, a3-layer rectangle spiral antenna is manufactured, detailed measurement and analysis are performed in lab vitro and vivotest, final test result is given and the discrepancy with simulation is analyzed. |
PDF Full Text Request