Figure10 Fabricated sample of measuring the far-end crosstalk
(S41)
The results of HFSS simulation and physical test are shown in Figures 11
and 12 respectively. Figure 11 shows the magnitude of far-end crosstalk
between coupled microstrip lines. The far-end crosstalk between
microstrip lines is significantly smaller after etching TL-shaped DMS,
and TL-shaped DMS has excellent ability to suppress far-end crosstalk.
Therefore, TL-shaped DMS in the 0-8GHz band can effectively suppress the
far-end crosstalk between coupled microstrip lines, and the maximum
reduction of the far-end crosstalk between coupled microstrip lines can
reach 42dB. There is a slight deviation between the simulation results
and the test results, which is mainly caused by the error of the
dielectric constant of the samples, but the trend of two results are
almost identical. The crosstalk reduction method based on the TL-shaped
DMS is compared with other crosstalk reduction methods using DMS, and
the results are shown in Table 1. It can be seen that the TL-shaped DMS
adopted in this paper is most effective in suppressing far-end crosstalk
under the condition of relatively simple structure.