access icon free Miniaturised slot antenna for biomedical applications

© The Institution of Engineering and Technology
Received 27/06/2013, Published

An implantable slot antenna with a miniaturised size of 139.7 mm3 (10 × 11 × 1.27 mm) for biomedical applications is proposed. Operating at the Medical Implant Communications Service (MICS) band, miniaturisation of the antenna is realised by etching a meandered slot on the top metal with one end open. A microstrip line is utilised as excitation with a shorting connected to the radiator. In addition, two U-shaped stubs are adopted to match the feeding impedance to 50 Ω. The antenna is simulated in a one-layer skin model as well as in the arm of a human model and measured in skin-mimicking tissue. Good agreements can be obtained and the measurement results show that a broad bandwidth of 28.3% (from 354 to 469 MHz) for |S 11| less than − 10 dB can be achieved.

Inspec keywords: prosthetics; microstrip lines; antenna radiation patterns; microstrip antennas; biological tissues; impedance matching; slot antennas

Other keywords: slot antenna miniaturisation; meandered slot; microstrip line; etching; biomedical application; human model; antenna radiator; resistance 50 ohm; layer skin model; U-shaped stub; skin mimicking tissue; medical implant communication service; impedance matching

Subjects: Industrial and medical applications of microwaves; Prosthetics and other practical applications; Prosthetics and orthotics; Single antennas; Waveguides and microwave transmission lines

References

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      • 2. Karacolak, T., Hood, A.Z, Topsakal, E.: ‘Design of a dual-band implantable antenna and development of skin mimicking gels for continuous glucose monitoring’, IEEE Trans. Microw. Theory Tech., 2008, 56, (4), pp. 1001–1008 (doi: 10.1109/TMTT.2008.919373).
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      • 3. Merli, F., Fuchs, B., Mosig, J.R., Skrivervik, A.K.: ‘The effect of insulating layers on the performance of implanted antennas’, IEEE Trans. Antennas Propag., 2011, 59, (1), pp. 21–31 (doi: 10.1109/TAP.2010.2090465).
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2013.2125
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