Compact Physical Model for Crosstalk in Spin-Wave Interconnects

We propose a formalism of a compact physical model for crosstalk noise analysis between two coplanar backward volume spin-wave interconnects. Comparing the amplitudes of the signal in the active line and the noise in the victim line, we introduce a figure of merit for crosstalk - the longitudinal or line-to-line coupling. It is shown that the crosstalk becomes prohibitively high as the edge-to-edge spacing between the lines goes down, and thus putting a limitation on the routing and placement in a spin-wave bus network. The position of the peak crosstalk noise coupling for different spacings and frequencies of excitation reveals a new limitation to the maximum interconnect length. Furthermore, the technique of superposition analogous to RLC interconnects is exploited to explain the complicated nature of crosstalk noise and develop a mechanism for modeling crosstalk. Finally, a compact physical model is derived using analytical expressions, which demonstrate a reasonably good agreement with the actual full micromagnetic simulation results.