FEXT Analysis and its Mitigation Using Double-slit Complementary Split-Ring Resonators

Abstract

The operating speed of a digital signal and systems are in several GHz range to initiate faster response. Due to this high frequency and operating speed of the signals more and more signal integrity related issues may arise and these issues has to be solved for the better performance of the system. Now a day’s integration and miniaturization of digital devices of printed circuit boards (PCBs) are the key features in high speed technology. The printed circuit boards traces are crowded in the design and creates magnetic coupling interference between them. These traces are considered as transmission lines which carrying signal and power between two more points. When current flows through the traces a magnetic field is always set up and interact with the neighboring conductor due to close proximity. The magnetic coupling is mutual and not possible to avoid it. In the result the signal gets affected which degrades the performance of the system to great extent. So, it is necessary to reduce the effect of mutual coupling to improve the performance of the system for its better signal integrity. The mitigation of mutual coupling effect is analyzed and suppression is achieved using metamaterial based complementary split-ring resonators. A new design of double-slit CSRR is used to reduce the crosstalk which is due to coupling. The FEXT analysis is carried out for the frequency range of 5 GHz to 10 GHz.