Showing papers by "Christopher Potter published in 1994"
01 Dec 1994
TL;DR: In this paper, the relationship between instrumentation errors in scalar power measurements and the corresponding residual directivity, source match and frequency response errors in a six port reflection measurement is investigated.
Abstract: INTRODUCTION The performance of a six port Vector Reflection Analyzer is mainly limited by the accuracy of its calibration kit, but the fundamental limit is due to the instrumentation. This paper shows the relationship between instrumentation errors in scalar power measurements and the corresponding residual directivity, source match and frequency response errors in a six port reflection measurement. Furthermore, enough measurements are made during a normal calibration to produce a figure of merit for the instrumentation as a by-product.
01 Dec 1994
TL;DR: Using an inexpensive six port reflection analyzer and a scalar detector, it is possible to greatly improve measurement performance by correcting for source match error in the transmission measurement.
Abstract: INTRODUCTION Scalar transmission measurements are limited mainly by mismatch errors when the insertion loss is small. Unlike vector analyzers, it is not possible to use 12term error correction to reduce these errors. However, using an inexpensive six port reflection analyzer and a scalar detector, it is possible to greatly improve measurement performance by correcting for source match error in the transmission measurement. The load match can’t be errorcorrected, but in practice the source match error dominates since a detector is better matched than the source output or test port of a bridge.