Skip to Main content Skip to Navigation
Journal articles

Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications

Abstract : Wireless implantable bioelectronics and accurate in vivo characterization of path loss require efficient and robust in-body antennas. Loading electric antennas with the effective permittivities higher than that of surrounding tissues are a promising solution. In this letter, proof-of-concept conformal microstrip antennas are proposed. The antennas are optimized for a standard impedance of 50 \Omega and operate in all high-water-content tissues. Integral ground plane shields the antenna from inner circuitry. The radiation efficiencies are 0.4%, 2.2%, and 1.2% for the (434, 868, and 1400) MHz designs, respectively, when computed in a \varnothing100 mm spherical phantom with muscle-equivalent properties. The efficiencies are compared to the fundamental limitations and closely approach them. Specific absorption rates are evaluated, and the corresponding maximum input power levels are established. Prototypes are fabricated and characterized to validate the design.
Document type :
Journal articles
Complete list of metadatas

Cited literature [48 references]  Display  Hide  Download

https://hal-univ-rennes1.archives-ouvertes.fr/hal-02442755
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, February 11, 2020 - 4:45:31 PM
Last modification on : Monday, October 5, 2020 - 9:50:29 AM
Long-term archiving on: : Tuesday, May 12, 2020 - 3:36:02 PM

File

Nikolayev et al-2019-Dielectri...
Files produced by the author(s)

Identifiers

Citation

D. Nikolayev, W. Joseph, A. Skrivervik, M. Zhadobov, L. Martens, et al.. Dielectric-Loaded Conformal Microstrip Antennas for Versatile In-Body Applications. IEEE Antennas and Wireless Propagation Letters, Institute of Electrical and Electronics Engineers, 2019, 18 (12), pp.2686-2690. ⟨10.1109/LAWP.2019.2948814⟩. ⟨hal-02442755⟩

Share

Metrics

Record views

96

Files downloads

221