EMC Coupling Between Two Composite Right/Left-Handed (CRLH) Transmission Lines on PCBs
Keywords:
CRLH, crosstalk, coupler, EMCAbstract
Unintentional electromagnetic coupling (crosstalk) between PCB lands is an important aspect of the design of an electromagnetically compatible product. In this paper, analytical model to predict crosstalk between two composite right/left-handed (CRLH) transmission lines in close proximity on PCBs is developed, and validated with full-wave simulation and measurement results. A cascaded seven unit cells CRLH transmission line (TL) acting as source of the electromagnetic emission was placed in close proximity to another seven unit cells CRLH transmission line acting as receptor of the emission on PCBs. Then the near- and far-end crosstalk voltages induced from the generator CRLH-TL to receptor TL for various separations between them were analyzed. It is shown that the crosstalk voltages computed with developed analytical model agrees well with full-wave simulation and measured results. Furthermore, it is shown that the left-handed capacitance and inductance design parameters of CRLH-TL can be used to reduce the crosstalk voltages induced on the receptor circuit leading to a cost-effective solution for shielding of near-by CRLH-TL receptor circuits printed on PCBs for various engineering applications.
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