To calculate the behavior of an ideal metallic grid, only B ( ω ω ) needs to be found. The standard approach is not to characterize the equivalent circuit by B ( ω ω ) , but instead to parameterize it with values of L , C , and R which duplicate the transmission properties of the filters. At low frequencies, a reasonable model is to replace the shunt in the transmission line with a capacitor of value 2 C for capacitive meshes and an inductor of value L / 2 for inductive meshes, where for complementary grids L i n d = C c a p . However, at high frequencies this model fails to reflect the behavior of real metallic meshes correctly. The measured transmissions as ω ω → → 1 are