Finite-difference time-domain (FDTD) simulation of a parabolic reflector antenna in the transmitting phase. Reflector antennas are frequency-independent antennas and they are highly directive. As long as the source is located at the focal point, the reflected field travels in the broadside direction. In this simulation, two short pulses – first one at central frequency of 100 MHz and the other at 200 MHz are fired from the focal point (VHF regime). f/D (focal length/diameter) ratio is 0.257.
Normally, the feed antenna is also chosen to be directive, but for the purpose of illustration, we have chosen a point source as the feed antenna.
Also see below:
Half Wavelength Dipole Antenna Radiation
Oblique Plane Wave Reflection From Half Space
Radiation from a Circularly Tapered Dielectric Waveguide
Right Hand Circular Polarization (RHCP) Animation
Linear Polarization Animation
Left Hand Elliptical Polarization (LHEP) Animation
Standing Wave Pattern (SWR) Animation
Electromagnetic Propagation of UWB Short Pulse in Random Medium