Method for contact-free testing of antennas applied to a material web

摘要

A method for contact-free testing of antennas applied to a material web, wherein the material web having the antennas is passed to a measurement device. The antennas are passed past an assigned measurement antenna arrangement of the measurement device in the region of the measurement device and the measurement antenna arrangement has a high-frequency signal Smess of a transmitter applied to it. This signal is correlated with a pre-determined working frequency fA of the antennas. The high-frequency signal Srück that returns from the measurement antenna arrangement is determined and compared with default values, and the adherence to production tolerances is determined by the comparison of the returning high-frequency signal Srück with the default values for each of the individual antennas.