【作者】 吴边； 梁昌洪； 陈亮； 李刚；

【Author】 WU Bian LIANG Chang-hong CHEN Liang LI Gang National Key Laboratory of Antennas and Microwave Technology,Xidian Univ.,Xi’an,710071

【机构】 西安电子科技大学天线与微波技术国家重点实验室；

【摘要】 复合左右手传输线(CRLH TL)由于其具有的异常特性可以用来制作各种新颖的微波器件和天线部件。文中研究了一种新型的开口谐振环缺陷地面结构(SRR DGS)复合左右手传输线,与传统形式复合左右手传输线相比,避免了对地过孔,同时引入带外传输零点,从而增加了边带的陡峭度。采用曲线拟合技术提取出单元等效电路值,详细推导了该单元模型的传输零点位置、色散特性、阻抗特性以及折射率,给出了级联结构传输特性随单元数目的变化规律。数值结果表明,该传输线具有带传输零点的复合左右手传输特性。更多还原

【Abstract】 The composite right/left-handed transmission line(CRLH TL) has been widely applied to the design of novel microwave devices and antennas making use of its abnormal properties.A split-ring resonator defected ground structure(SRR DGS) CRLH transmission line is investigated,which introduces an out-of-band transmission zero and avoids grounded via compared with the conventional CRLH transmission line,thus leads to a sharp slop at band-edge.Then the transmission zero location,dispersive relation,impedance characteristic as well as refraction index are derived in detail.The authors also investigate the affection of the cell numbers on the transmission characteristic of the cascaded series structures.The numerical results show that,the SRR DGS transmission line has the composite right/left-handed transmission properties with transmission zero.更多还原