A Wideband Bear-Shaped Compact Size Implantable Antenna for In-Body CommunicationsShow others and affiliations
2022 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 12, no 6, p. 2859-, article id 2859Article in journal (Refereed) Published
Abstract [en]
Biomedical implantable antennas play a vital role in medical telemetry applications. These types of biomedical implantable devices are very helpful in improving and monitoring patients' living situations on a daily basis. In the present paper, a miniaturized footprint, thin-profile bear-shaped in-body antenna operational at 915 MHz in the industrial, scientific, and medical (ISM) band is proposed. The design is a straightforward bear-shaped truncated patch excited by a 50-Omega coaxial probe. The radiator is made up of two circular slots and one rectangular slot at the feet of the patch, and the ground plane is sotted to achieve a broadsided directional radiation pattern, imprinted on a Duroid RT5880 roger substrate with a typical 0.254-mm thickness (epsilon(r) = 2.2, tan delta = 0.0009). The stated antenna has a complete size of 7 mm x 7 mm x 0.254 mm and, in terms of guided wavelength, of 0.027 lambda(g) x 0.027 lambda(g) x 0.0011 lambda(g). When operating inside skin tissues, the antenna covers a measured bandwidth from 0.86 GHz to 1.08 GHz (220 MHz). The simulations and experimental outcomes of the stated design are in proper contract. The obtained results show that the calculated specific absorption rate (SAR) values inside skin of over 1 g of mass tissue is 8.22 W/kg. The stated SAR values are lower than the limitations of the federal communications commission (FCC). Thus, the proposed miniaturized antenna is an ultimate applicant for in-body communications.
Place, publisher, year, edition, pages
MDPI AG , 2022. Vol. 12, no 6, p. 2859-, article id 2859
Keywords [en]
implantable antenna, bear-shaped patch, wideband performance, compact size, biomedical applications
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-310997DOI: 10.3390/app12062859ISI: 000775850700001Scopus ID: 2-s2.0-85126334786OAI: oai:DiVA.org:kth-310997DiVA, id: diva2:1652953
Note
QC 20220420
2022-04-202022-04-202022-06-25Bibliographically approved