Antenna Factor Calibration

Correction Value

Measured voltage at the connector is insufficient for determining total field intensity without an accurate factor. This correction accounts for the effective length and gain of the structure at every tested frequency. Engineers apply the resulting table to raw data to produce a defensible emission report.

Traceable Reference

Calibration labs use a known standard antenna to verify the performance of the device under test within a controlled environment. The process often involves a three-antenna method to eliminate variables and ensure absolute accuracy. These results are traceable to international measurement standards to maintain consistency across different test sites.

Chamber Reflection

Reflections from the floor and walls of the test site can introduce errors during the characterization of the hardware. Modern facilities use high performance absorbers to minimize these multipath effects during the antenna factor calibration sequence. Maintaining a stable environment is essential for repeatable data.