Crosstalk Of Finite-length Transmission Lines In Arbitrary Directions On The Same Ground Plane

Abstract

Transmission lines in the proximity are not always in parallel directions but in arbitrary directions. In this paper, crosstalk or coupling between transmission lines in the arbitrary directions is studied by using a circuit concept. Under the condition of weak coupling, self-capacitances and self-inductances of the transmission lines can be approximated to be invariant in spite of existence of a proximate line. Mutual-capacitances and mutual-inductance is estimated by considering the coupling mechanism for an external electromagnetic field to a transmissicin line. To generalize our mode, a four-port network is also studied.

Maximum Crosstalk Estimation in Weakly Coupled Transmission Lines

“…The crosstalk between the aggressor and victim circuits at the near-end and far-end loads can be evaluated using (18), though the resulting expression does not provide the worst case crosstalk at all frequencies. The maximum crosstalk can be found through mathematical manipulations that find a maximum envelope for crosstalk given in (18).…”

“…Initially much of the crosstalk analysis was limited to two transmission line systems; however, Paul [8], [9] was also able to expand crosstalk analysis to systems containing more than two transmission lines. Some recent work expands upon initial formulations presented in [1]- [9] with crosstalk analysis in the time domain [10]- [14], in non-uniform transmission lines [15], [16], and in systems with signal lines that are not parallel [17], [18]. Statistical characterization of crosstalk in multiconductor transmission lines has also been explored [19]- [21].…”

Analysis of crosstalk between snakelike circuits in proximity

“…In terms of [3], when #1 is excited by external electromagnetic fields of angular frequency ,the coupling phenomenon can be demonstrated as follows: ' …”

“…So the crosstalk between the lines is a crucial problem. In [3], the coupling level of the line system is assumed to be less than about -15dB.…”

Analysis of distributed coupling along nonparallel traces using PEEC with phase term expansions

“…In that paper a quasi-static Green's function extension of the the partial element equivalent circuit (PEEC) method was used to achieve good results. A similar problem was addressed with a circuit based approach in [2]. Other full-wave methods, like the finite-difference timedomain, may also be applied to such a problem [3].…”