A measuring system for the accurate determination of material characteristics ε´r, μ´r tan δε, tan δμ in dielectrics and ferrites at microwave frequencies

A method and equipment for the measurement of dielectric constant, permeability and losses tan δ_ε and δ_μ tan in the frequency range from 30 me to 7000 mc was described. Many times in the history of science it has taken many years from the original concept to the development of a generally useful device. The Cathode Ray Tube, invented during the last decade of the last century was a curiosity of the laboratory for more than 30 years before it became a practical instrument. Likewise it is believed that the Material Constants Test Assembly has changed the long-known standing wave indicator from its position as laboratory standard into a powerful industrial and scientific tool.