Management of modulated wave solitons in a two-dimensional nonlinear transmission network

摘要

Based on a modified one-dimensional Noguchi electrical transmission network containing a linear dispersive element C-S with a voltage source and a one-dimensional series capacitor transmission network, we build a two-dimensional nonlinear discrete electrical network which allow the wave propagation in both the longitudinal and the transverse direction. These transmission lines are coupled to one another in the transverse (longitudinal) direction by a linear capacitor C-2 (a linear inductor L-1 in parallel with the linear capacitance C-s). The linear dispersion relation of the network system is derived and the effects of the transverse coupling element C-2 on the linear waves are established. Using the continuum limit approximation and assuming that the perturbation voltage is small enough compared with the equilibrium value, we show that the dynamics of small-amplitude pulses in the network can be governed by a two-dimensional modified Zakharov-Kuznetsov (ZK) equation with a voltage source term. Analyzing the wave propagation in a reduced direction, we show that a best choice of the coupling capacitance C-2 and the linear dispersive element C-S can lead to the propagation at the same frequency of two distinct waves propagating in different reduced propagation directions. The transverse stability of plane solitary waves is investigated and the effects of the dispersive element C-S on the transverse instability are presented. Through the analytical exact bright solitary wave solution of the derived ZK equation, we investigate analytically the effects of the linear dispersive element C-S, the effects of the management parameter, and the effects of the reduce propagation direction on the characteristic parameters (amplitude, width, and velocity) of bright solitary waves propagating through our network system. We find that the management parameter of the ZK equation can be used to manipulate the motion of pulse voltages through the network system.