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This paper proposes a capacitive miniature PIFA works at UHF band. Double-layer mushroom structure EBG is used as a reflector of the PIFA instead of PEC. The size of the new PIFA is 1/8 of the operation wavelength and 1/2 of the traditional one. The EBG structure enhances the radiation efficiency of the antenna about 33.3%.
The EBG structure have special electromagnetic properties such as high surface impedance and suppression of propagating surface currents within a frequency band. Fractal structure has two special properties: space-filling property and self similarity property which may help the antenna have good performance. In this paper, a new PIFA with fractal EBG structure as its ground will be investigated. The...
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