Heat distribution pattern of double brillouin pulse inside water

In a dispersive medium excited by a wideband pulse, the appearance of the steady-state part of the propagated signal is preceded by oscillations known as precursors. Precursor fields in lossy Debye media have been shown to present a sub-exponential attenuation rate, thus becoming good candidates for applications requiring field penetration into such media. This paper aims to study the performance of a pulse consisting of two mutually delayed precursors for microwave heating. A comparison between this particular pulse and a general excitation, modulated rectangular pulse, will be presented. Finite difference time domain simulations under a specific algorithm for calculation of temperature distribution pattern of microwave heating are employed to evaluate the performance of precursor-based excitation and to compare it with modulated rectangular pulse.