A multiband antenna for biomedical telemetry and treatments

This paper presents the design of a tri-band adhesive antenna for biomedical telemetry. Since human body is lossy in nature, the signal transmitted from an implantable medical device is usually very weak. The adhesive antenna acts like a repeater which increases the strength of the signal. This allows the signal to be sent effectively to the base station. The antenna is designed to resonate at 375 MHz, 2.525 GHz and 5.625 GHz. The measurement results show that the antenna has 10 dB impedance bandwidths of 400 MHz (175 – 575 MHz), 950 MHz (2.125 – 3.075 GHz) and 1.5 GHz (5.125 – 6.625 GHz) to cover the MICS, ISM and IEEE 802.11 WLAN bands, respectively. The proposed antenna is printed on a flexible Rogers RT/duroid 5880 epoxy substrate with a volume of 70 mm × 80 mm × 1 mm. The simulated and measured performance of the antenna confirms its omnidirectional radiation patterns and dual-band operation with high return losses.