A simple method for extreme impedances measurement - experimental testing

Randus, Martin; Hoffmann, K.

doi:10.1109/arftg.2008.4804276

Cited by 27 publications

(8 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The values of calibration standards were chosen similarly to [6] -two resistors and OPEN. Since calibration standards have values of the order of kΩ a special attention must be paid on the setting of the electromagnetic simulator to get an appropriate accuracy of the frequency solver in CST.…”

Section: Methodsmentioning

confidence: 99%

“…The ripples, however, do not represent any serious problem. They can be eliminated by the measurement method itself if the reference impedance, see [5], [6], is realized similarly like the calibration standards.…”

Section: B Standard With Glass Coaxial Linementioning

confidence: 99%

“…The process needs at least three full known calibration standards. The basic problems of these calibrations and measurements were mentioned in [6]. These are the absence of well-defined calibration standards and low mounting reproducibility of standards and a device under test (DUT).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Study of calibration standards for extreme impedances measurement

Haase

Hoffmann

2014

83rd ARFTG Microwave Measurement Conference

Self Cite

View full text Add to dashboard Cite

The paper describes first results of pioneering research in the field of calibration standards for the measurement of extreme impedances. It is a necessary step for the measurement of extreme impedances since the method has been developed. The proposed calibration standards are based on coaxial microwave connector APC-7 and were extensively analyzed in CST Microwave Studio at the frequency range from 0.1 GHz to 18 GHz. Some of the analyzed structures seem to be promising for measurements of tiny very high impedance structures like carbon nanotubes or atto-farad varactors.Index Terms -Calibration standard, CST Microwave Studio, microwave measurement, APC-7, impedance measurement.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: B Standard With Glass Coaxial Linementioning

confidence: 99%

See 1 more Smart Citation

Study of calibration standards for extreme impedances measurement

Haase

Hoffmann

2014

83rd ARFTG Microwave Measurement Conference

Self Cite

View full text Add to dashboard Cite

show abstract

“…While this approach is particularly promising for applications such as field effect transistors, it relies upon the production of a large number of identical, semiconducting nanofibers which is still a significant challenge [9,10]. Randus and Hoffman have pioneered an approach to extreme impedance measurements based on hybrid couplers [11][12][13]. Conceivably, this method might be extended to on-wafer devices, but so far it has only been demonstrated in coaxial systems.…”

Section: Introductionmentioning

confidence: 97%

Broadband measurements of nanofiber devices: Repeatability and random error analysis

Wallis

Imtiaz

Lim

et al. 2010

2010 76th ARFTG Microwave Measurement Conference

View full text Add to dashboard Cite

On-wafer, broadband measurements of two-port nanofiber devices were made in order to test the short-term repeatability of a widely used measurement approach that builds on established on-wafer calibration techniques. The test devices used in this study consist of Pt nanowire and Au microbridge structures incorporated into two-port coplanar waveguides. Based on repeated measurements of these test structures, we computed statistical (Type A) uncertainties. The standard deviation (k=1) of five repeated measurements of a Pt nanowire device was less than 50 μS. The analysis suggests refinements to the measurement process depending on the desired output of the measurements, e.g. the broadband response itself or the extraction of circuit model parameters.

show abstract

“…Randus et al proposed the method to reduce the uncertainty of the reflection coefficient measurement by using VNA [2]. In their method, the reflection coefficient is evaluated by measuring transmission coefficients between two ports of 180-degree 3dB hybrid coupler with RS (reference standard).…”

Section: Introductionmentioning

confidence: 99%

Radiation efficiency measurement based on Wheeler method using hybrid coupler and phase shifter

Watanabe

Ishii

2014

2014 IEEE International Workshop on Electromagnetics (iWEM)

View full text Add to dashboard Cite

A method to evaluate reflection coefficients accurately by using a hybrid coupler and a sliding short is modified to save measurement time. For modified method, a digital phase shifter is used to vary the phase of reference standard. Radiation efficiency based on Wheeler method for a monopole antenna is evaluated by the modified method to confirm the effectiveness of using the digital phase shifter instead of the sliding short.

show abstract

A simple method for extreme impedances measurement - experimental testing

Cited by 27 publications

References 4 publications

Study of calibration standards for extreme impedances measurement

Study of calibration standards for extreme impedances measurement

Broadband measurements of nanofiber devices: Repeatability and random error analysis

Radiation efficiency measurement based on Wheeler method using hybrid coupler and phase shifter

Contact Info

Product

Resources

About