Focusing of the pulse modulated radiation of a concentric waveguide array in biological tissues: An investigation made feasible by HPC

Abstract

The use of High Performance Computing (HPC) to enable the investigation of the focusing ability of a concentric waveguide array in a biological tissue model, using pulse modulated microwave signals, is reported. First, the medium response to time harmonic excitation of the array is predicted, by solving the associated boundary value problem. Then, pulse modulated excitation of the array is considered and the temporal evolution of the electromagnetic fields produced at any point within tissue is obtained in the form of an inverse Fourier integral. The resulting algorithm parallelisation requires minimal additional effort and enables large scale computations to be made inside the biological tissue. Numerical results with linear speedup performance executing on a 48 node Intel Paragon XP/S are presented for a three-layer geometry, irradiated by a 30 element-waveguide array.