Thus we find that if the electric field vector is represented in the phasor form as , then can be represented by the phasor . The integral can be represented by the phasor . In the same manner, higher order derivatives and integrals with respect to t can be represented by multiplication and division of the phasor by higher power of . Considering the field phasors and source phasors in a simple linear isotropic medium, we can write the Maxwell's equations for time harmonic case in the phasor form as:

                                               (5.44a)