Report/Guide

Gregory, A P; Hodgetts, T E; Clarke, R N; Hill, G J (2023) Calculations of the Fringing Capacitance of Cylindrical Electrodes. NPL Report. TQE 28

Gregory, A P; Clarke, R N (2012) Tables of the complex permittivity of dielectric reference liquids at frequencies up to 5 GHz. NPL Report. MAT 23

Gregory, A P; Clarke, R N; Hodgetts, T E; Symm, G T (2008) RF and microwave dielectric measurements upon layered materials using coaxial sensors. NPL Report. MAT 13

Gregory, A P; Clarke, R N (2001) Tables of the complex permittivity of dielectric reference liquids at frequencies up to 5 GHz. NPL Report. CETM 33

Lynch, A C; Evans, S; Clarke, R N (1998) The numerical relationship between permittivity and loss tangent. Technical Report. Emma Club Technical Note No. 1

Clarke, R N; Ide, J P; Orford, G R; Ridler, N M (1996) Draft EAL procedure for the assessment of vector network analysers (VNA). Technical Report.

Gregory, A P; Clarke, R N; Hodgetts, T E; Symm, G T (1993) RF and microwave dielectric measurements upon layered materials using a reflectometric coaxial sensor. NPL Report. DES 125

Article

Gregory, A P; Blackburn, J F; Hodgetts, T E*; Clarke, R N; Lees, K; Plint, S*; Dimitrakis, G A* (2017) Traceable measurement and imaging of the complex permittivity of a multiphase rock specimen at micron scales using a microwave microscope. Ultramicroscopy, 172. pp. 65-74.

Ridler, N M; Clarke, R N; Huang, H*; Zinal, S* (2016) Evaluation of cross-connected waveguides as transfer standards of transmission at high millimetre-wave frequencies. Metrologia, 53 (4). pp. 1069-1078.

Gregory, A P; Blackburn, J F; Lees, K; Clarke, R N; Hodgetts, T E*; Hanham, S M*; Klein, N* (2016) Measurement of the permittivity and loss of high-loss materials using a near-field scanning microwave microscope. Ultramicroscopy, 161. pp. 137-145.

Gregory, A P; Hao, L; Klein, N*; Gallop, J C; Mattevi, C*; Shaforost, O*; Lees, K; Clarke, R N (2014) Spatially resolved electrical characterisation of graphene layers by an evanescent field microwave microscope. Physica E, 56. pp. 431-434.

Gregory, A P; Clarke, R N; Cox, M G (2009) Traceable measurement of dielectric reference liquids over the temperature interval 10 ºC - 50 ºC using coaxial-line methods. Meas. Sci. Technol., 20 (7). 075106

Gregory, A P; Clarke, R N (2007) Dielectric metrology with coaxial sensors. Measurement Science and Technology, 18 (5). pp. 1372-1386.

Gregory, A P; Clarke, R N (2006) A review of RF and microwave techniques for dielectric measurements on polar liquids. IEEE Trans. Dielectr. Electr. Insul., 13 (4). pp. 727-743.

Gregory, A P; Clarke, R N (2005) Traceable measurements of the static permittivity of dielectric reference liquids over the temperature range 5 - 50 ºC. Meas. Sci. Technol., 16. pp. 1506-1516.

Gregory, A P; Clarke, R N (2005) Traceable measurements of the static permittivity of dielectric reference liquids over the temperature range 5 - 50 ºC. Meas. Sci. Technol., 16 (7). pp. 1506-16.

Clarke, R N (1997) Dielectric measurements at NPL. Ampere Newsletter, University of Cambridge (12).

Conference or Workshop Item

Hao, L; Cox, D; Lees, K; Gallop, J C; See, P; Clarke, R N; Janssen, T J B M; Zhang, R F*; Wei, F* (2012) Fabrication and characterization of carbon nanotubes as r.f interconnects. In: 2012 IEEE 12th International Conference on Nanotechnology (IEEE-NANO), 20-23 August 2012, Birmingham, UK.

Gregory, A P; Clarke, R N (2006) Monte-Carlo simulation of the uncertainties of coaxial sensor dielectric measurements. In: CPEM 2006 Conference on Precision Electromagnetic Measurements, 9-14 July 2006, Torino, Italy.

Gregory, A P; Clarke, R N (2006) Monte-Carlo simulation of the uncertainties of coaxial sensor dielectric measurements. In: CPEM 2006 Conference on Precision Electromagnetic Measurements, 9-14 July 2006, Torino, Italy.

Awan, S A; Miall, J; Lees, K; Clarke, R N (2005) Accurate dielectric measurements at frequencies up to 10 GHz based on novel M/NEMS devices. In: BioNano3 International Conference, September 2005, University of Sussex.

Awan, S A; Miall, J; Lees, K; Clarke, R N (2005) Novel 2D and 3D M/NEMS devices for accurate electromagnetic measurements. In: BEMC 2005 - British Electromagnetic Measurements Conference, 14-17 November 2005, NPL, UK.

Gregory, A P; Clarke, R N (2002) Traceable measurements on dielectric reference liquids over the temperature range 10 - 50 ºC using coaxial-line methods. In: 2002 Conference on Precision Electromagnetic Measurements (CPEM), 16-21 June 2001, Ottawa, Canada.

Hill, G J; Lees, K; Blackburn, J; Clarke, R N (2001) Investigation of the energy distribution in a re-entrant cavity. In: BEMC 2001- 10th British Electromagnetic Measurement Conference, 6-8 November 2001, Harrogate, UK.

Smith, F C*; Thompson, R P; Liang, W L; Clarke, R N; Lederer, P G* (2001) Measurement of electromagnetic surface waves using an optically modulated scatterer. In: BEMC 2001- 10th British Electromagnetic Measurement Conference, 6-8 November 2001, Harrogate, UK.

Smith, F C*; Thompson, R P; Liang, W L; Clarke, R N; Lederer, P G* (2001) On the prediction and measurement of the electromagnetic fields close to a coated diffracting edge at grazing incidence. In: BEMC 2001- 10th British Electromagnetic Measurement Conference, 6-8 November 2001, Harrogate, UK.

Gregory, A P; Etzel, S; Clarke, R N (2000) Precise measurements on dielectric reference liquids over the temperature range 5-50 ºC using coaxial line methods. In: Conference on Precision Electromagnetic Measurements (CPEM) 2000, 14-19 May 2000, Sydney, Australia.

Liang, W; West, P D; Loader, B G; Lees, K; Gregory, A P; Clarke, R N (2000) Traceable calibration of specific absorbtion rate (SAR) for mobile phone dosimetry. In: Conference on Precision Electromagnetic Measurements (CPEM) 2000, May 2000, Sydney, Australia.

Liang, W; West, P D; Rochard, O C; Paul, J*; Salter, M J; Clarke, R N (1999) Calibration of implantable electric field probes for mobile phone dosimetry. In: BEMC 99 - 9th International Conference on Electromagnetic Measurement, 2-4 November 1999, Brighton, UK.

Gregory, A P; Etzel, S; Clarke, R N (1999) Traceable measurements of the static permittivity of dielectric reference liquids at temperatures from 5 to 50ºC using a micrometer driven admittance cell. In: BEMC 99 - 9th International Conference on Electromagnetic Measurement, 2-4 November 1999, Brighton, UK.

Clarke, R N; Gregory, A P; Hodgetts, T E; Simm, G T*; Brown, N* (1995) Microwave measurements upon anisotropic dielectrics - theory and practise. In: BEMC 95 7th British Electromagnetic Measurements Conference Digest, 6-9 November 1995, Malvern.

Lynch, A C; Clarke, R N (1993) Dielectric measurements in open resonators: some new corrections. In: 6th British Electromagnetic Measurements Conference Digest (BEMC 93), 2-4 November 1993, NPL, Teddington, UK.

Clarke, R N; Gregory, A P; Hodgetts, T E; Symm, G T (1993) Improvements in coaxial sensor dielectric measurement: relevance to aqueous dielectrics and biological tissue. In: IEEE Electromagnetic wave interaction with water and moist substances: Microwave aquametry; electromagnetic wave interaction with water containing materials, June 1993, Atlanta, GA, USA.

Gregory, A P; Clarke, R N (1993) Improvements in design, measurement and calibration techniques for open-ended coaxial dielectric sensors. In: 6th British Electromagnetic Measurements Conference Digest (BEMC 93), 2-4 November 1993, NPL, Teddington, UK.

Clarke, R N (1993) Improving measurement confidence and achieving traceability in dielectric measurements through the use of reference materials. In: 6th British Electromagnetic Measurements Conference Digest (BEMC 93), 2-4 November 1993, NPL, Teddington, UK.

Book

Clarke, R N; Gregory, A P; Cannell, D*; Patrick, M*; Wylie, S*; Youngs, I*; Hill, G* (2003) A guide to the characterisation of dielectric materials at RF and microwave frequencies. Institute of Measurement and Control / National Physical Laboratory. ISBN 0904457389