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Characteristics of Electromagnetically Coupled Small Broadband Monopole Antenna with Multiple Shorting Pins  

Jung Jong-Ho (School of Electrical and Computer Engineering, Ajou University)
Moon Youngmin (Samsung Advanced Institute of Technology)
Choo Hosung (School of Electronic and Electrical Engineering, Hongik University)
Park Ikmo (School of Electrical and Computer Engineering, Ajou University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.15, no.12, 2004 , pp. 1168-1177 More about this Journal
Abstract
This paper presents the characteristics of the electromagnetically coupled small broadband disk-loaded monopole antenna with multiple shorting pins. The electromagnetically coupled monopole antenna can achieve broad bandwidth by controlling resonant frequency of the rectangular disk-loaded monopole and a probe with the spiral strip line monopole. The number and arrangement of the shorting pin affect the capacitance of the disk. The variation of the capacitance changes resonant frequency of the antenna, and therefore, its electrical sizes and frequency bandwidth are also affected. The antenna with three shorting pins has a volume of $0.094\lambda_0{\times}0.094\lambda_0{\times}0.094\lambda_0$ in electrical length and the frequency bandwidth of $26.8\%\;for\;VSWR\leq2$ with the center frequency at 2.556 GHz.
Keywords
Electromagnetically Coupled Antenna; Electrically Small Antenna; Monopole Antenna; Multiple Shorting Pins;
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