Electrical standards of measurement. Part 2: R.F. and microwave standards

Steele, J. McA.; Ditchfield, Cynthia; Bailey, A.E.

doi:10.1049/piee.1975.0263

Cited by 5 publications

(3 citation statements)

References 24 publications

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“…A diode detector and feedback loop were incorporated to ensure a constant RF level to better than 0.0002 dB over 10 min. A second unique feature associated with the moving "air-bearing" piston was its ability to be used as a precision air gauge for checking the dimensions of the electroformed copper guide [29].…”

Section: United Kingdom-nplmentioning

confidence: 99%

The waveguide below-cutoff attenuation standard

Russell

1997

IEEE Trans. Microwave Theory Techn.

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A semitutorial review of the history, development, and application of waveguide below-cutoff (WBCO) attenuation standards is presented. A brief summary of the electromagnetic (EM) theory is followed by descriptions of the various designs implemented over a span of 60 years. Designs range from simplistic to elaborate electromechanical creations that stretch the toolmaker's art yet are ultimately dependent upon the primary standard of length.Index Terms-Attenuators, calibration, high frequency, measurements, standards, uncertainty, waveguide standards. David H. Russell is a microwave/millimeter wave engineer who retired from the Electromagnetic Fields Division, National Institute of Standards and Technology (NIST), Boulder, CO, in 1993. As a Group Leader, he directed the development of power, noise, impedance, and attenuation standards, and their application in automated measurement systems. His group also did pioneering work in design and fabrication of on-chip standards for monolithic microwave integrated circuits (MMIC) device metrology. During 38 years at NIST, his research interests were primarily in standards and systems for microwave and millimeter wave attenuation metrology in coaxial, uniconductor, and planar waveguides.

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Section: United Kingdom-nplmentioning

confidence: 99%

The waveguide below-cutoff attenuation standard

Russell

1997

IEEE Trans. Microwave Theory Techn.

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“…Accurate measurement of microwave power is carried out in terms of accurately known de power using power sensing devices which are based either on calorimetric principle or on bolometric principle [1][2][3]. For determining the absolute value of the effective efficiency of bolometer mounts both single load and twin load microcalorimeters are widely used [4] at medium power levels. This paper reports the work done at the National Physical Laboratory on the development and fabrication of thin-film X-band bolometer (barretter) mounts and the single load microcalorimetric technique.…”

Section: Indexing Terms: Microcalorimeter Microwave Power Measuremefmentioning

confidence: 99%

“…The effective efficiency YJe of the mount is defined [5] as (4) r is the reflection co-efficient of the bolometer mount.…”

Section: The Principle Of Microcalorimetrymentioning

confidence: 99%