Antenna Calibration Intervals

What is antenna calibration and why is it important?
An antenna calibration is a verification of performance and the measurement of the antennas properties. Much of the success or failure of EMC test depends on the performance of a calibrated antenna.

Calibration Interval will depend on several factors:
Antenna calibration is important to ensure repeatable, reliable data and the calibration interval should be set depending on the quality system policy of the organization, conformance to your testing procedures/standard and also on the reliability of the antenna. The antenna factor of a well-designed and well-built antenna should not change provided the antenna is handled with care. If repeat calibrations show that the antenna factor does not deviate by more than the uncertainty of measurement, the calibration interval can be extended.