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The module on the left corner displays a circle of radius R and a short dipole in the center of a spherical coordinate system. The center of the circle lies in the origin of the system. The circumference of the circle shows vector E sub r, H sub theta, and E sub theta are perpendicular to each other. The radius of the circle makes an angle theta with the z axis in the z y plane and an angle phi in x y plane.

The grapher on the right corner of the module displays an electromagnetic wave propagates into the air almost in every direction with a decrease in strength.

The bottom of the module displays the detail of the input for Hertzian dipole is as follows:

Delta omega t step equals 2 degrees

Omega t equals 0 degree

Plot range equals 2.0 lambda

A radio button is off that reads horizontal plane

A radio button is on that reads vertical plane

A checkbox is unchecked that reads current animation

A radio button is on that reads magnetic field

A radio button is off that reads electric field

A radio button is off that reads H sub theta left bracket exact solution right bracket

A radio button is off that reads H sub theta minus H sub start expression theta F F end expression left bracket error right bracket

A radio button is on that reads H sub start expression theta F F end expression left bracket far-field approximation right bracket