Papers Published

1. Kang, S.-R.D. and Ko, W.H. and Plonsey, R., The radiation field from a small current loop in a dissipative spherical medium, Proceedings of the 24th annual conference on engineering in medicine and biology, 1972 (1971), pp. 309 - .
   (last updated on 2007/04/16)

   Abstract:
   The technology of biotelemetry has developed rapidly. Units have been implanted in animals and human beings to measure vital signs. However, no theoretical study has been made to investigate the radiation properties of the implanted loop antenna. Observed results indicate field strength as well as radiation pattern are affected by the host body. In laboratory tests the received RF signal power from a transmitter is increased after it is implanted in a rat or rabbit although one would expect the implanted transmitter signal to be reduced due to its finite conductivity. An explanation is presented of how a transmitter imbedded in a body can have more effective radiation. The results may be used to predict a possible optimum frequency and the best orientation of the loop antenna inside a subject

   Keywords:
   antennas;biomedical electronics;telemetering;