Small Wearable Meta Materials Antennas for Medical Systems.

Communication industry is in rapid growth in the last years. Efficient small antennas are crucial in the development of medical systems. Low efficiency is the major disadvantage of small antennas. Meta material technology is used to improve the efficiency of small antennas. Design tradeoffs, computed and measured results of wearable meta-materials antennas with high efficiency are presented in this paper. All antennas were analyzed by using 3D full-wave software, ADS. The antennas electrical parameters on the human body are presented. The gain and directivity of the patch antenna with split-ring resonators, SRR, is higher by 2.5 dB than the patch antenna without SRR. The resonant frequency of the antennas with SRR is lower by 5% to 10% than the antennas without SRR. The resonant frequency of the antenna with SRR on human body is shifted by 3%. [ABSTRACT FROM AUTHOR]