Feasibility Study of Using the Housing Cases of Implantable Devices as Antennas
| Autor: | Manoj Stanley, Muaad Hussein, Jiafeng Zhou, Rula Alrawashdeh, Muayad Kod, Abed Pour Sohrab, Yi Huang, Guozheng Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
General Computer Science
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| Zdroj: | IEEE Access, Vol 4, Pp 6939-6949 (2016) IEEE Access |
| ISSN: | 2169-3536 |
| Popis: | A novel antenna design for implantable pacemakers is proposed. The housing of a pacemaker is utilized as an antenna to cover both the 402–405 MHz Medical Implant Communication Service band and the 433-MHz Industrial, Scientific and Medical band. This is achieved by exploiting radiating characteristic current modes of the housing case. These modes are excited using a capacitive coupling element with the help of a matching circuit. The radiation pattern of this antenna is optimized to be in a desirable direction away from the body (off-body direction). The ability of the proposed antenna for communications is demonstrated using a transceiver and a base station at 433 MHz. A communication range of 1 m is established when a transmitter with the proposed antenna is implanted in a rabbit and the power fed by the transceiver to the antenna is $25~\mu \text{W}$ . A longer range of up to 19 m can be established with the maximum allowable transmit power within the safety limits. Furthermore, the far field wireless power transfer through the proposed antenna is investigated by experiment. A received power of up to $22.38~\mu \text{W}$ by the proposed antenna is demonstrated when an equivalent isotropically radiated power of 140 mW is transmitted 1 m away from a transmitting antenna. From the same transmitting antenna in the same distance, a power of 4 mW can be received when the transmit power is within safety limits. This power can be used to recharge a small battery or a capacitor, which can potentially cover the communication power consumption of the pacemaker and hence extend the life span of the primary battery. |
| Databáze: | OpenAIRE |
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