Z Transform and FDTD Method in Unmagnetized Plasma

The Z transform is typically used in digital filtering and signal processing problems. The paper illustrates the use of the Z transform in implementing the FDTD method where it is useful to avoid dealing with convolution integral in the time domain by going immediately to Z domain. This work study the pulse propagation in free space that comes upon a plasma. Plasma is very interesting medium and the results illustrated that at low frequencies, it looks like a metal, and higher frequency, it become transparent just like a dielectric medium

Electromagnetic Fields in Tissue- Equivalent Liquids for Different Frequencies by Means of Flux Density

It is possible to use the dielectric parameters (effective permittivity and equivalent conductivity) of tissue equivalent liquids to evaluate electric and magnetic field for different electromagnetic wave frequencies. The electric and magnetic field in tissue equivalent liquids has been evaluated by means of flux density. Electromagnetic waves with different frequencies has been simulated used the finite difference time domain method. Found that the electric field amplitude decrease by increasing the frequency. The results reveal many interesting properties for measuring specific absorption rate