Reducing crosstalk between microstrip lines using CSR structure

Abstract

Aiming at the problem of crosstalk between microstrip lines, a method of reducing crosstalk by using cross‐shape resonators (CSR) structures is proposed. On the premise of not changing the spacing of microstrip lines, this method adds CSR structures between the coupled microstrip lines to increase the capacitive coupling and thus to suppress the far‐end crosstalk. Based on the analysis of the equivalent circuit of CSR structure, the parameters simulation and verification are carried out by ADS and HFSS software. Through HFSS simulation and physical test of the designed CSR structure, the results show that: the CSR structure can significantly reduce the far‐end crosstalk by about 15 dB in the frequency of 0–10 GHz, and the maximum can reach 43 dB. Compared with 3W crosstalk reduction method and rectangular‐shape resonators crosstalk reduction method, the crosstalk reduction effect is improved.

Transmission Lines in Modern Communication Systems: A Systematic Review

“…The review also presents novel methods for mitigating crosstalk, a major concern in high-speed data transmission. One study introduces Cross-Shaped Resonators (CSR) for microstrip lines, achieving impressive crosstalk reduction without altering line spacing [33]. This simplifies implementation but necessitates further exploration at higher frequencies.…”

Crosstalk Reduction in High-Density Radio Frequency Printed Circuit Boards: Leveraging FR4 Coating Layers

“…The authors found that the serpentine microstrip layout reduced the near-end (NEXT) and far-end (FEXT) crosstalk by 10 dB and 2 dB, respectively, and showed the best overall crosstalk reduction. Another paper [2] proposes placing a cross-shaped resonator (CSR) structure between the aggressor and victim microstrip lines, which reduces the FEXT crosstalk by up to 15 dB and provides better results than the 3 × W distance rule. A study of microstrips with dielectric coating layers on top is presented in [3]; simulated dielectric layers had thicknesses of up to 7 mil (0.17 mm), and showed a reduction in FEXT crosstalk by up to 24 dB.…”