In this paper, we present a wideband planar Eshaped textile antenna and study its performance numerically and experimentally. The textile material and radiation patch shape provide the antenna a wide working band (2.25 GHz-2.75 GHz). A digital human model is established to numerically analyze the affect of human body on antenna. Experiments are carried out to study the performance changes of antenna in different states which may be experienced in the potential applications. These states are antenna on human body, antenna getting bent, and antenna after getting wet. The simulated and measured results in free space and on human chest show good agreement with each other. From the study it is also found that the textile antenna's performance does not get deteriorated in these states. Therefore, the wideband planar E-shaped textile antenna is suitable for body-centric wireless communications with high quality.

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Abstract-A shaped-beam series-fed aperture-coupled stacked patch array antenna at X-band is presented.To improve the array bandwidth, two-port aperture-coupled stacked patch antennas, which are suitable for the series-fed array configuration, are presented as the radiating elements. To offer the pattern design and optimization progresses more flexibility, a uniformly spaced array configuration is applied in the shaped-beam pattern design, instead of the conventional nonuniformly spaced array configuration. The experimental results show that, in a 7.6% bandwidth, the main beam shape of the array maintains in good agreement with the design goal, and the side lobe level maintains lower than −18 dB.

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