摘要
研究了多层复合左右手传输线结构微波滤波器的滤波特性.用有限时域差分法对结构滤波特性进行了数值模拟和优化,结果表明结构的几何参数得到优化匹配时,在带内衰减-10 dB处左手通带带宽0.46 GHz,插入损耗-0.38 dB,带内没有波纹等滤波特性.表明结构的几何参数得到优化匹配时,可得到通带带宽更宽,插入损耗降低,带内平坦度提高的滤波特性.
To study the filter characteristic of the microwave band-pass filter by multilayered (ML) composite- right/left - handed (CRLH) transmission line (TL) structure, the structural filter characteristic was optimized ,and numerical simulations were made by the finite-difference time-domain (FDTD)method. The results showed that :When the structural design parameter were well matched, as in-bandpass loss was -10 dB, passband width became 0. 46 GHz, if insertloss is -0. 38 dB, wave filter characteristics were not showed inside band width. This means that the better design parameters were set the better filter characteristics such as broader pass band , lower insert loss , better flatterness could gee.
出处
《西安工业大学学报》
CAS
2008年第1期40-43,共4页
Journal of Xi’an Technological University
关键词
多层复合左右手传输线
有限时域差分法
几何参数
滤波特性
multilayered compact right and left handed transmission line(ML CRLH TL)
finite difference time domain method(FDTD)
design parameter
filter characteristic