Reflectometer calibration using planar NiCr thin-film resistors and an open circuit

Stumper, U.

doi:10.1109/19.377833

Cited by 4 publications

(1 citation statement)

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“…To provide traceability of reflection coefficients to national standards Stumper (1995;2000) presented a method using resistive layers of nichrome filling the cross-section of 7 mm coaxial transmission lines. The nichrome was sputtered on thin capton foils with gold electrodes providing contact to the outer and inner conductor of the line.…”

Section: Introductionmentioning

confidence: 99%

Optimization of traceable coaxial RF reflection standards with 7-mm-N-connector using genetic algorithms

Schräder

2003

Adv. Radio Sci.

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Abstract.A new coaxial device with 7-mm-N-connector was developed providing calculable complex reflection coefficients for traceable calibration of vector network analyzers (VNA). It was specifically designed to fill the gap between 0 Hz (DC, direct current) and 250 MHz, though the device was tested up to 10 GHz. The frequency dependent reflection coefficient of this device can be described by a model, which is characterized by traceable measurements. It is therefore regarded as a "traceable model". The new idea of using such models for traceability has been verified, found to be valid and was used for these investigations. The DC resistance value was extracted from RF measurements up to 10 GHz by means of Genetic Algorithms (GA). The GA was used to obtain the elements of the model describing the reflection coefficient of a network of SMD resistors. The DC values determined with the GA from RF measurements match the traceable value at DC within 3·10 −3 , which is in good agreement with measurements using reference air lines at GHz frequencies.

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Section: Introductionmentioning

confidence: 99%