CST – Computer Simulation Technology

Title:
Enhanced Microstrip Guard Trace for Ringing Noise Suppression Using a Dielectric Superstrate
Author(s):
Yung-Shou Cheng, Wei-Da Guo, Chih-Pin Hung, Ruey-Beei Wu, Daniël De Zutter
Source:
IEEE Transactions on Advanced Packaging
Vol./Issue/Date:
Volume: 33, Issue: 4, Nov. 2010
Year:
2010
Page(s):
961 - 968
Keywords:
Crosstalk noise, dielectric superstrate, guard trace, noise suppression, ringing noise, signal integrity
Abstract:
Grounded guard traces are increasingly used to reduce the coupling-induced crosstalk, but the incurred ringing noise will strongly limit the performance for the microstrip structures. This paper describes the generation mechanism of the ringing noise and derives an analytical formula of the noise magnitude. Besides, an enhanced microstrip guard trace design is proposed to eliminate the ringing noise by covering the original microstrip structure with a superstrate of higher permittivity. A design space versus the superstrate thickness and the dielectric constant are constructed and in which, the guard trace needs be grounded at the two ends only without causing any ringing noise. Finally, the time-domain simulations and experiments are performed to verify the proposed concept.
Document:

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