The Effect of Open-Looped Resonators on Suppression of Cross-Talk of Multi-Channel Microstrip Lines

• Main Authors: Shu-HaoChang, 張書豪
• Other Authors: Bing-Jing Li
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/r62585

碩士 === 國立成功大學 === 電機工程學系 === 105 === Cross-talk is an important issue for the signal integrity of high frequency, high speed and multiple signal-transmission-lines in modern electronic products. Usually, 3W rule and guard trace between neighboring signal-lines are applied to reduce or suppress the effect of cross-talk. Both methods suffer a drawback that the effect of cross-talk increases with frequency. To alleviate the problem, open-looped resonators were introduced between signal lines recently and analysis showed that cross-talk could be greatly suppressed in low-frequency range and increased in high-frequency range. In this study, the effect and suppressing mechanism of open-looped resonators were investigated deeply by analyzing the cross-talk with varied design parameters, such as length of the resonators, size and position of the open gap, separation distance between two neighboring resonators or between the resonator and signal line, and number of resonators. Numerical results showed that open-looped resonators only affected the cross-talk between adjacent signal lines and had no influence on that of lines among which there was one or more other lines. The resonant frequency which separated the frequency range into the low-frequency section and high-frequency section was primarily determined by the length of the resonator. The size of resonator and separation distance could alter the available bandwidth of low-frequency section of suppression. Finally, real signal lines embedded with open-looped resonators were implemented to confirm the numerical results and a design rule of the resonators was proposed for practical applications.