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http://dx.doi.org/10.5515/KJKIEES.2010.21.9.921

Dual-Band Array Antenna Using Modified Sierpinski Fractal Structure  

Oh, Kyung-hyun (Samsung Thales)
Kim, Byoung-chul (School of Electrical and Computer Engineering, Ajou University)
Cheong, Chi-hyun (Samsung Thales)
Kim, Kun-woo (Samsung Thales)
Lee, Duk-young (Samsung Thales)
Choo, Ho-sung (School of Electronic and Electrical Engineering, Hongik University)
Park, Ik-mo (School of Electrical and Computer Engineering, Ajou University)
Publication Information
Abstract
This paper presents a dual-band array antenna based on a modified Sierpinski fractal structure. Array structure is mirror symmetric, and forms broadside radiation pattern for dual frequency band if the ports are fed with $180^{\circ}C$ phase difference between upper and lower $2{\times}1$ array. To use in-phase corporate feeding circuit, the phase inversion structure is designed by changing the position of patch and ground for upper and lower array. The dimensions of the array antenna is $28{\times}30{\times}5\;cm^3$ and the bandwidth of 855~1,380 MHz(47 %), 1,770~2,330 MHz(27 %) were achieved for -10 dB return loss. The measured gain is 9.06~12.44 dBi for the first band and 11.76~14.84 dBi for the second band. The half power beam width is $57^{\circ}$ for x-z plane and $46^{\circ}$ for y-z plane at 1,100 MHz and $43^{\circ}$ and $28^{\circ}$ at 2,050 MHz, respectively.
Keywords
Antenna; Array; Dual Band; Fractal;
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