Abstract
In this study, an electrically small 3-stage monocone antenna with wideband characteristics is proposed. The proposed antenna consists of a 3-stage monocone radiator, a circular disk located above the radiator, shorting pins connecting the circular disk and the ground plane, and parasitic structures. The impedance matching characteristics in the high-frequency band are improved by dividing the monocone radiator into three stages. The insertion of a slot in the circular disk improves the mid-frequency band performance. The low-frequency band is expanded by using shorting pins. In addition, by attaching parasitic structures to the ground plane, the impedance-matching characteristics in the mid-frequency band are further improved. The proposed antenna has a −10 dB impedance bandwidth ranging from 0.98 to 11.1 GHz and a monopole-like radiation pattern.
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