For this round of testing, we purchased 9 more products, and after hours of testing, here are the 6 most accurate metal detectors we found.

The problem of surface waves usually degrades the performance of planar circuits and antennas, to reduce its effects, the electromagnetic band gap (EBG) structures are applied to suppress these ...

A miniature neon indicator lamp, also known as a Glow Discharge Detector (GDD), costing about 50 cents, was found to be an excellent room temperature THz radiation detector. A proof of concept of 300 ...