中文摘要：

针对无源超材料高色散、高损耗和均匀性差的缺点，利用集总元件和负微分元件设计、加工了一种微波频段的有源可调谐超材料传输线，并对其进行了测试．实验获得了具有散射参数随外加偏置电压改变而变化的电控可调谐特性以及衰减常数为负值的有源超材料传输线．

英文摘要：

To overcome the defects of metamaterials, such as high dispersion, the high loss, and the problem of homogenization, we design and implement an active tunable metamaterial transmission line, and measure the characteristics of active tunable metamaterial transmission line that is based on lumped elements and negative differential devices. From the measured results, it exhibits not only electronically tunable scattering parameters （electro-control tunable characteristic） but also the negative attenuation constant （the propagation amplification） in the left-handed frequency band （active characteristic）.