Unit Cell Models for Composite Right/Left-handed Transmission Lines (CRLH-TL) Metamaterials
Based on the homogeneous composite right/left-handed transmissions lines (CRLHTL) equivalent circuit model, an unit cell model for CRLH-TL metamaterials having left-handedness (LH), right-handedness (RH) and stop-bandedness at different frequencies presented. The CRLH TL unit model is a meta-structured TL composed of a series capacitance and a shunt inductance as well as a series inductance and a shunt capacitance. The series capacitance and the shunt inductance provide the LH nature at lower frequencies, whereas the series inductance and the shunt capacitance provide the RH nature at higher frequencies and possible exhibiting stopbanded properties of supporting an infinite-wavelength wave at a finite and nonzero frequency, an unique characteristic of CRLH-TL. We can obtain |S21|=1 at a desired center frequency and also make a desired phase shift over a unit cell possible. The unit cell model for CRLH-TL is analyzed using S-parameter formulations resulting in some useful closed-form expressions for design purposes. Finally, the relationships between the frequencies f and ε,μ, the index of refraction n,βare analyzed, respectively. These results provide some useful references in significantly facilitating the design of CRLH-TL for a given specification.
Wanzhao Cui Wei Ma
National Key Laboratory of Space Microwave Technology Xian Institute of Space Radio Technology, Xian 710100, China
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
845-848
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）