Design and Development of a Dual-Band PIFA Antenna for Wireless Biotelemetry Applications

摘要

This study presents a dual-band PIFA antenna for wireless biotelemetry applications as there are high demands for faster data communication and batter antenna performance. Especially patients in the complicated chronic illness such as diabetes required more stable wireless sensor and antenna in their biomedical devices. The antenna is designed and developed for operating at two frequency ranges, 402-405 MHz for Medical Implant Communications Service (MICS) and 1427-1432 MHz for Wireless Medical Telemetry Service (WMTS) bands. Rogers R03210 is selected as material layers to cover the antenna and preserve the biocompatibility of the structure. The antenna is designed regardless for the changes of different glucose levels in human tissues. The optimized antenna, using genetic algorithms, has dimensions of 23.6mm × 19.4mm × 2.4mm. The antenna is designed using XFDTD simulator, and the prototype is verified in a TX-151 tissue which is a mimicking solution. The results showed acceptances between simulation and measurement for the -10dB bandwidths. While the result was better at the MICS band due to the antenna dimension and the weight function, it still showed the decent agreement in the WMTS band. The differences on each frequency band are found from the gap between substrate and superstrate. The input power for this implanted antenna should be limited below 3.16 mW.