1. A kind of planar waveguides for cheating the high-speed digital signals into misidentifying the characteristic impedance.
- Author
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Wu, Chia Ho, Qian, Zhenyu, Wang, Wei, Peng, Song Tsuen, Liu, Chengyang, Shen, Jianqi, Ni, Donghua, Ye, Guoqiang, He, Fang, Wang, Xiaolong, Shen, Linfang, and Li, Qichao
- Subjects
MICROSTRIP transmission lines ,ELECTRIC lines ,LATTICE constants ,ELECTROMAGNETIC coupling ,PROBLEM solving ,PLANAR waveguides - Abstract
Since a planar periodic transmission line can suppress drastically the electromagnetic coupling, it would be advantageous to use such a kind of transmission lines in solving the problem of miniaturization of circuit area. By adjusting the lattice constants and geometric parameters of periodic microstrip lines, a time domain characteristic impedance that is the same as that of conventional microstrip lines (CMLs) can be achieved. Such periodic microstrip lines can therefore be used to trick high-speed digital signals, causing a digital signal to misjudge the time domain characteristic impedance of the transmission lines. The theoretical analysis has been verified by our experimental measurement results. Besides, a specific expression for the characteristic impedance of lossless periodic artificial materials is deduced by a circuit model and a standard of misidentification for the characteristic impedance of periodic microstrip lines is given for the digital signals. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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