Abstract

A novel internal meandered loop antenna for multiband operation in the mobile phone has been proposed. Strong effects of the user's hand on the impedance and radiation characteristics of the antenna have been observed. Results indicate that, when the user's hand is close to or cover a certain portion of the antenna, large decrease in the antenna's radiation efficiency and great distortion in the antenna's radiation pattern for both the unbalanced and balanced modes will occur. On the other hand, when the user's hand holds the mobile phone with a large distance to the proposed antenna, smaller decrease in the radiation efficiency has been observed for the antenna's self-balanced mode than the antenna's two other unbalanced modes.

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