Direct Comparison Transfer of Microwave Power Sensor Calibrations (Classic Reprint) - Softcover

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Excerpt from Direct Comparison Transfer of Microwave Power Sensor Calibrations

One of the main sources of uncertainty in any power transfer is'caused by the impedance mismatch between the source and the power sensors connected to the source. Figure 1 shows the alternate connection of two sensors to a source. The power sensors in a direct comparison are of the terminating type and usually consist of a standard sensor and one or more unknown sensors. Historically, the direct comparison method was used for single frequency or narrow-band measurements or for measurements where a low uncertainty was not required. The reasons for using the direct comparison instead of other methods are speed and simplicity. There are several options for using the technique depending Figure 1. Alternate connection of standard on the accuracy required. The higher accuracy unknown detectors to a generator.

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