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Miniaturised slot antenna for biomedical applications

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3 Author(s)
Li-Jie Xu ; Ministerial Key Laboratory of JGMT, Nanjing University of Science and Technology, Nanjing 210094, People's Republic of China ; Yong-Xin Guo ; Wen Wu

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 |S11| less than - 10 dB can be achieved.

Published in:

Electronics Letters  (Volume:49 ,  Issue: 17 )