Wide-Slot MIMO Antennas with Electromagnetic Band-Gap Reflector for Wideband MIMO Radar Applications

• Main Authors: Ming-hung Hsu, 徐銘鴻
• Other Authors: Ken-Huang Lin
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/05269274807375961060

碩士 === 國立中山大學 === 電機工程學系研究所 === 101 === This thesis investigates antenna design for wideband multi-input multi-output (MIMO) radar system applications. The advantages of MIMO radar are excellent in target detectable performance, good in angular estimation accuracy and decreased minimum detectable velocity ability. In recently proposed literature, using wideband signals could enhance the performance in detection for MIMO radar systems. Therefore we design a MIMO antenna with a wide frequency bandwidth and uni-directional radiation pattern for MIMO radars. To achieve the requirement mentioned above, we adopt the wide-slot antenna for wide bandwidth that operates within C band and use electromagnetic band-gap (EBG) structure as reflector for uni-directional radiation to reflect energy into forward direction. Additionally, we introduce a spiral slot as a resonator to enhance the isolation for the sake of MIMO operations. The impedance bandwidth of the proposed antenna system is 46.2% with uni-directional radiation pattern and the isolation between two antenna elements is above 15 dB, which is acceptable within the operating band.