Original sentence: In 1999, certain self similar fractal shapes were shown to have a property of "frequency invariance" — the same electromagnetic properties no matter what the frequency — from Maxwell's equations (see fractal antenna)
Edited sentence: In 1999, self similar, fractal shapes were shown to be the requirement to obtain 'frequency invariance'--the same electromagnetic properties no matter what the frequency--from Maxwell's Equations.Thus fractal pose a deep meaning to understanding how light, radio, and other electromgnetic radiation works in physics (see fractal antenna)