By Impedans Ltd
This effort now culminates with the launch of Lab RFx, our advanced RF calibration laboratory. The laboratory is cleanroom standard with tight environmental temperature control. It houses the most accurate RF calorimeter available on the market for 50 Ohm RF power calibration. It also houses the most accurate impedance analyser available on the market, used for calibrating voltage and current at non-50 Ohm conditions. Lab RFx is not used for 'creating' RF standards but rather for transferring RF standards to our range of RF power and voltage and current sensors through our advanced, proprietary calibration techniques. Impedans power meters can now boast 1% accuracy over the widest VSWR range on the market, limited only by the equipment available to test a wider range. Impedans have also developed an advanced VI probe calibration technique which overcomes many of the problems associated with the open/short technique discussed earlier. This technique enables the transfer of the impedance analyser accuracy to the VI probe directly. This allows highly accurate RF impedance measurements up to 90 degrees phase angle and over a wide range of impedance magnitudes. The proprietary calibration technique resolves many of the challenges that limit the accuracy of VI probes, including (a) frequency response levelling, (b) temperature compensation, (c) open and short deficiencies and (d) harmonic distortion rejection. The transfer of both the power standard and the impedance standard to the VI probe provides for power, voltage and current measurements into 50 Ohms and non-50 Ohms with an accuracy not seen before. Lab RFx uses NIST traceable equipment throughout and adopts ISO standard quality control and testing practices.
