An Integral Equation Domain Decomposition Method for Efficient RFIC Analysis

A discontinuous Galerkin method based on hybrid meshes is proposed in this paper to alleviate the multiscale problem commonly existing in the electromagnetic simulation of multilayered circuits. Based on nonconformal meshes, this method separates geometrically regular from irregular parts in complex multiscale multilayered circuits to implement independent mesh discretization. Rectangular meshes are employed to discretize geometrically regular parts to reduce the number of unknowns. Triangular meshes are employed to accurately approximate the target geometry for geometrically irregular parts. Non-conformal wire meshes are employed for the vertical vias in the high-speed circuit. This makes the mesh discretization of each via connection layer independent of each other, improving mesh discretization flexibility. In addition, the discontinuous Galerkin method is used to ensure the continuity of the current between the different regions of the circuit. Numerical examples verify that this method has high accuracy and efficiency in the electromagnetic simulation of multilayered circuits.