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Design and Fabrication of a Wide Band and Multi-Resonation Planar Antenna  

Lee, Hyeon-Jin (Dept. of Electronics & Information Eng., Dongkang College)
Park, Seong-Il (Dept. of Electronics, Chonnam National University)
Lim, Yeong-Seog (Dept. of Electronics, Chonnam National University)
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Abstract
This study designed and fabricated a multi-purpose planar antenna for base stations that are accessible to DCS, WiBro, and ISM. The proposed antenna was designed into an open loop form from the existing monopole structure. The capacitance of the multi-purpose antenna was increased by the coupling of open parts. This makes the use of MMIC and LTCC convenient and the antenna is smaller and has a larger gain than existing antennas. The resonance distance and bandwidth can be adjusted by changing the open gap and the height of the loop of the antenna. The bandwidth of the designed antenna satisfies DCS, IMT-2000, WiBro, Bluetooth, wireless LAN and ISM bands based on VSWR 2. The entire frequency bandwidth is $58.75\%$ of $1.575GHz\~2.985GHz(1.41GHz)$. Also, the radiation pattern of the antenna displayed co-polarization and cross-polarization characteristics at 1.6GHz, 2.3GHz and 2.8GHz.
Keywords
multi-purpose planar antenna;
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