James Clerk Maxwell

The Scottish physicist whose four equations, published in the 1860s, unified electricity, magnetism, and light into a single theory — the peak of 19th-century physics and the foundation of all of radio. He predicted electromagnetic waves twenty years before Hertz made them.

He also produced the first color photograph and the kinetic theory of gases. Every RF, antenna, and wave tool here ultimately computes inside Maxwell's framework.

Portrait: a stylized blueprint-line rendering, not a photograph.