50.5 MB (50.0 MB compressed)
4591 x 3845 pixels
38.9 x 32.5 cm ⏐ 15.3 x 12.8 in (300dpi)
PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
Horn antenna. This is a standard gain horn antenna, used to calibrate the gain of other antennas. Gain is a measure of the efficiency of an antenna at converting input power to radio waves of a specific direction.
Model release not required. Property release not required.