Antennas for Over-Body-Surface Communication at 2.45 GHz
Antennas for Over-Body-Surface Communication at 2.45 GHz
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DOI：
10.1109/tap.2009.2014525
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发表时间：
2009-04-01
影响因子：
5.7
通讯作者：
Scanlon, William G.
中科院分区：
文献类型：
--
作者：
Conway, Gareth A.;Scanlon, William G.
在本文中，一系列的可穿戴天线的身体上的性能进行了研究，通过测量垂直杆S-21垂直杆路径增益之间的两个设备安装在组织等效的数值和实验幻影，在2.45 GHz的人体肌肉组织的代表。特别是，研究集中在一个紧凑的高模式微带贴片天线（HMMPA）的性能与低至λ/20的轮廓。5毫米和10毫米高的HMMPA原型的阻抗带宽分别为6.7%和8.6%，足以满足2.45 GHz工业、科学和医疗（ISM）频段的工作要求，与基模微带贴片天线相比，两种天线的路径增益都高出11 dB。通过增加缩短壁，基模贴片的路径增益可提高7 dB。值得注意的是，体上HMMPA的性能与垂直于组织表面安装的相同尺寸的接地平面上的四分之一波长微带天线相当，这表明低剖面和物理上更坚固的天线是用于体戴天线应用的有前途的解决方案。
In this paper, the on-body performance of a range of wearable antennas was investigated by measuring vertical bar S-21 vertical bar path gain between two devices mounted on tissue-equivalent numerical and experimental phantoms, representative of human muscle tissue at 2.45 GHz. In particular, the study focused on the performance of a compact higher mode microstrip patch antenna (HMMPA) with a profile as low as lambda/20. The 5- and 10-mm-high HMMPA prototypes had an impedance bandwidth of 6.7% and 8.6%, respectively, sufficient for the operating requirements of the 2.45-GHz industrial, scientific, and medical (ISM) band and both antennas offered 11-dB higher path gain compared to a fundamental-mode microstrip patch antenna. It was also dernonstrated that a 7-dB improvement in path gain can be obtained for a fundamental-mode patch through the addition of a shortening wall. Notably, on-body HMMPA performance was comparable to a quarter wave monopole antenna on the same size of ground-plane, mounted normal to the tissue surface, indicating that the low-profile and physically more robust antenna is a promising solution for bodyworn antenna applications.