copper

Understanding how shields perform in the near field requires accounting for wave impedance differences between electric and magnetic sources. This sixth installment derives shielding effectiveness formulas for near-field conditions and reveals a surprising truth: copper outperforms steel at low frequencies, but steel's superior absorption reverses this advantage above 4kHz.

Discover why copper shields outperform steel at low frequencies but steel dominates at high frequencies. This practical guide presents simplified formulas for calculating electromagnetic shielding effectiveness, revealing the surprising crossover point at 4200 Hz where material performance flips.

Scientists from the University of Southern California have found a way to create less expensive TV and smartphone screens.

United Copper Inc., of Denton, Texas, is recalling 50-foot and 1,000-foot 12/2 metal clad aluminum...