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In this letter, we propose a compact spiral stripline‐loaded monopole antenna on a vertical ground plane. The measured results show that the antenna has a fractional bandwidth of 12.1% for a voltage standing wave ratio (VSWR) less than 2 at the center frequency of 1.10 GHz, as well as a good omni‐directional radiation pattern. The small size of 0.04 λo × 0.04 λo × 0.04 λo makes it promising for use as an internal antenna in mobile handsets.
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Nguyen et al. (2007) studied this question.
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