A Wideband Bear-Shaped Compact Size Implantable Antennafor In-Body Communications Articles uri icon

authors

  • SAROSH, AHMAD
  • MANZOOR, BILAL
  • PARACHA, KASHIF NISAR
  • HAIDER, SAJJAD
  • LIAQAT, MARYAM
  • AL-GBURI, AHMED JAMAL ABDULLAH
  • GHAFFAR, ADNAN
  • ALIBAKHSHIKENARI, MOHAMMAD
  • SALARSSON, MARIANA

publication date

  • March 2022

start page

  • 2859

end page

  • 2872

issue

  • 6

volume

  • 12

International Standard Serial Number (ISSN)

  • 2076-3417

abstract

  • 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-W 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 ( er = 2.2, tan d = 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 0.027lg x 0.027lg x 0.0011lg. 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.

keywords

  • implantable antenna; bear-shaped patch;wideband performance; compact size; biomedical; applications