Abstract
In this paper, a novel internal antenna, called a double-tailed helical antenna (DTHA), is proposed for modern mobile handsets. A DTHA has the merits of being compact in size, cost effective, easy to manufacture, and easyto fine-tune, as well as having good electrical performance. A prototype of a DTHA for operation in the EGSM/DCS bands is constructed and shown. Its volume can be limited to 28 X 6 X 6.5 mm. The measured and simulated return losses and the measured radiation patterns are obtained. The experimental results demonstrate the broad bandwidth and omnidirectional radiation performance of the newly developed antenna.
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