A Methodology for Evaluating Microwave Anechoic Chamber Measurements

The anechoic chamber measurement is evaluated in terms of the net power delivered to a transmitting antenna, the near-zone gains of open-ended rectangular waveguides and rectangular pyramidal horns, and reflections from chamber walls. The on-axis field intensity of the standard transmitting horn in an anechoic chamber is calculated in terms of the net power delivered to the transmitting antenna. The resulting data can be used for estimating the overall uncertainty in the anechoic chamber measurements. The statistical control of the measurement process by use of transfer standard antennas will monitor the measurement uncertainties. This paper discusses a methodology for evaluating anechoic chamber measurements.