Design of a Small Modified Minkowski Fractal Antenna for Passive Deep Brain Stimulation Implants
Date of this Version
A small planar modified Minkowski fractal antenna is designed and simulated in dual frequency bands (2.4 and 5.8GHz) for wireless energy harvesting by deep brain stimulation (DBS) devices. The designed antenna, physically being confined inside a miniaturized structure, can efficiently convert the wireless signals in dual ISM frequency bands to the energy source to recharge the DBS battery or power the pulse generator directly. The performance metrics such as the return loss, the specific absorption rate (SAR), and the radiation pattern within skin and muscle-fat-skin tissues are evaluated for the designed antenna. The gain of the proposed antenna is 3.2 dBi at 2.4GHz and 4.7 dBi at 5.8GHz; also the averaged SAR of the antenna in human body tissue is found to be well below the legally allowed limit at both frequency bands. The link budget shows the received power at the distance of 25 cm at 2.4GHz and 5.8GHz are around 0.4mW and 0.04mW, which can empower the DBS implant. The large operational bandwidth, the physical compactness, and the efficiency in wireless signal reception make this antenna suitable in being used in implanted biomedical devices such as DBS pulse generators.
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Sara Manafi and Hai Deng, “Design of a Small Modified Minkowski Fractal Antenna for Passive Deep Brain Stimulation Implants,” International Journal of Antennas and Propagation, vol. 2014, Article ID 749043, 9 pages, 2014. doi:10.1155/2014/749043
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/
This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Originally published in International Journal of Antennas and Propagation.