Abstract
This paper presented a small wideband patch antenna with a modified half U-slot and a shorting pin. This small patch antenna can achieve an impedance bandwidth of around 40% (S <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> <; -10dB) by introducing a modified U-slot and a shorting pin. The antenna size is electrically small, which are 0.012λ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0</sub> 2 (240mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> ). This small antenna has a very stable radiation pattern across its operating bandwidth, and has a peak gain of 2dBi.
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