Time reversal using source with complex shape (PEACE)

In the first simulation, several electromagnetic sources are used in the form the word "PEACE". The sources use a pulse signal to generate electromagnetic waves. Observation points are used to save the electric and magnetic fields at different points in a circle.
In the second simulation, the observation points are replaced by sources and they use the signals that have been saved in the first simulation, but time reversed. The electromagnetic waves generated form again the shape of PEACE.
You can imagine these electromagnetic waves like waves in water.

This simulation was performed in Matlab by using the FDTD method.

FDTD is a numerical technique that resolves Maxwell's equations in order to model electromagnetic problems. To learn the FDTD method:

James Webb's space telescope illuminated by an electromagnetic plane wave:

Moving electromagnetic sources:

Quadrilateral parabolic resonator:

Northrop Grumman B-21 Raider illuminated by a plane electromagnetic wave:

Random radiations in FDTD (blackbody radiation)

Parabolic antenna illuminated by an electromagnetic plane wave:

Young double-slit experiment with FDTD:

Computational electromagnetism with moving matter and some quantum phenomena:

Numerical approach for Doppler radars - drone:

Plane wave propagating in non-uniform medium with random dielectric characteristics:

Hand gestures and their radar signatures:

Elliptical cavity with two cylindrical waves:

Concave lens illuminated by a plane wave:

Talk about the theory of relativity:

Analysis of an RF receiver in ADS software:

Design of a mixer with ADS:

Wilkinson power divider:

Parabolic Reflector Antenna Design to Generate Pure High Order Vortex Modes at 24 GHz:

Numerical approach for Doppler radars - radar helicopter detection:

Numerical approach for Doppler radars: respiratory system:

Biconvex lens illuminated by a plane wave:

Moving metallic slab illuminated by a plane wave:

Northrop Grumman B-2 Spirit illuminated by a plane electromagnetic wave:

Moving airplane illuminated by an electromagnetic plane wave:

#matlab #electromagnetism #maxwellequations #fdtd #electrical #engineering