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In this paper, we proposed the dual polarization antenna for DCS, UMTS, and WiBro bands. To extend the impedance band width, the proposed antenna used the square loop radiators. In addition, by square loop radiators, the dimensions of an antenna are reduced. As a result of measurement after compensation, we can see that the first port is less than -14dB, the second port is less than -14dB and intra...
In this dissertation, we suggested the built-in chip antenna that can be applied to multiband by miniaturizing the size of the antenna and expanding the bandwidth to raise the efficiency of the built-in chip antenna for mobile handsets. The proposed chip antenna commercialized currently is redesigned to analyze the performance variation of the antennas. The experimental results show mobile handset...
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