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Meteracom
University of Bristol profile

Other IDs

Scopus Author ID: 7103124540

Keywords

Optoelectronics, RF Communications, Uncertainty, Instrument impairments, Metrology, covariance

Biography

Received a BSc in Electronic Engineering (Southampton University, UK, 1978) and a PhD in electronic engineering (London University, UK, 1990). Thesis concerned accurate measurement of high-speed optoelectronic devices at telecoms wavelengths.
Joined NPL, Teddington, UK in 1978 and retired in July 2022. My initial work was to develop techniques to characterize optoelectronic devices at up to millimeter-wave frequencies (1982-87); accurate wavelength measurement capabilities for optical fiber communications (1992-2003). Euramet IND16 “Ultrafast” (participant) IND51 “MORSE” (Coordinator). Science Area Leader in the Electromagnetic Technologies Group at NPL from 2009 to 2015.
Currently working as a Mercator Fellow on the METERACOM DFG funded programme, a Visiting Industrial Fellow at the University of Bristol and as a Guestworker at Physikalisch-Technische Bundesanstalt (PTB, Germany).
Chartered Engineer and Fellow of the IET (UK); Life Senior Member of IEEE (USA). I was awarded the IEE Ambrose Fleming Premium in 1987 and I have published over 100 journal and conf. papers. Book chapter (Modulation formats) in THz Communications: Paving the Way Towards Wireless Tbps. Co-chair for SPIE 'High-Speed Electronics and Optoelectronics' conference 23-27 March 1992,Tech. Prog. Committees CPEM 2012, 2014 and 2016, 89th ARFTG 2017.
Vice-Chair – IEEE SA 1765-2022 “Recommended Practice for Estimating the Uncertainty In Measurements of Modulated Signals for Wireless Communications… “, 2015 to date. IEC Technical Committees No 86, WG4 (1995-2008) and No. 85. Joined BSI W22 2021.

Activities

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Employment (3)

Physikalisch-Technische Bundesanstalt: Braunschweig, Niedersachsen, DE

2022-08-01 to 2025-07-31 | Guestworker
Employment
Source: Self-asserted source
David A Humphreys

The University of Bristol: Bristol, GB

2023-08-01 to 2025-06-30 | Honorary and Visiting Academic, Visiting Industrial Fellow (School of Electrical, Electronic and Mechanical Engineering)
Employment
Source: check_circle
University of Bristol - PURE

National Physical Laboratory: Teddington, GB

1978-09-11 to 2022-07-28 | Principal Research Scientist (retired) (Electromagnetic Technologies)
Employment
Source: Self-asserted source
David A Humphreys

Education and qualifications (2)

University College London: London, GB

1981-04-01 to 1990-06-01 | PhD (Electronic Engineering)
Education
Source: Self-asserted source
David A Humphreys

University of Southampton: Southampton, Southampton, GB

1975-10-01 to 1978-06-01 | BSc 2.2 Electonics (Electronics Engineering)
Education
Source: Self-asserted source
David A Humphreys

Professional activities (12)

Physikalisch-Technische Bundesanstalt: Braunschweig, Niedersachsen, DE

2019-09-01 to present | Mercator Fellow (DFG) Meteracom project
Invited position
Source: Self-asserted source
David A Humphreys

Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

1994-05-01 to present | Member (Surrey Branch)
Service
Source: Self-asserted source
David A Humphreys

IEEE: New York, NY, US

1990-09-01 to present | Life Senior Member
Membership
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

1980-01-01 to present | Fellow (Jan 2017)
Membership
Source: Self-asserted source
David A Humphreys

IEEE Standards Association: Piscataway, NJ, US

2016-01-24 to 2022-06-16 | Vice Chair: P1765 “Standard Working Group for Uncertainty in EVM and other metrics”
Service
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology : Stevenage, Hertfordshire, GB

2000-10-01 to 2021-09-30 | Senior Vice-Chairman
Service
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

2007-09-01 to 2008-10-01 | Guest Editor IEE Proc. Optoelectronics, Special Edition for OFMC 2007 Conference. vol. 2 no. 5, Oct. 2008. (Publishing)
Service
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

2005-09-01 to 2006-10-01 | Guest Editor IEE Proc. Optoelectronics, Special Edition for OFMC Conference. vol. 153 no. 5, Oct. 2006. (Publishing)
Service
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

2001-10-01 to 2002-09-30 | Chairman (Surrey Branch)
Service
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

1999-10-01 to 2000-09-30 | Junior Vice-Chairman (IEE Surrey Branch)
Service
Source: Self-asserted source
David A Humphreys

The Institution of Engineering and Technology: Stevenage, Hertfordshire, GB

1996-10-01 to 1999-09-30 | Treasurer (Surrey Branch)
Service
Source: Self-asserted source
David A Humphreys

SPIE: Bellingham, WA, US

1992-03-23 to 1992-03-27 | Co-chair ('High-Speed Electronics and Optoelectronics' conference)
Service
Source: Self-asserted source
David A Humphreys

Works (39)

Chapter 29 Modulation Formats

THz Communications: Paving the way towards Wireless Tbps
2021-12-08 | Book chapter
Source: Self-asserted source
David A Humphreys

Correction of periodic displacement non-linearities by two-wavelength interferometry

Measurement Science and Technology
2021-12-01 | Journal article
DOI: 10.1088/1361-6501/ac1dfa
Contributors: Angus Bridges; Andrew Yacoot; Thomas Kissinger; David A Humphreys; Ralph P Tatam
Source: check_circle
Crossref

Radiative Reference Plane Estimation and Uncertainty for THz Path Loss Measurements

2021 46th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz)
2021-08-29 | Conference paper
DOI: 10.1109/irmmw-thz50926.2021.9567147
Source: Self-asserted source
David A Humphreys
grade
Preferred source (of 2)‎

Analysis of time and frequency response for single/multi-tone stimulus harmonic phase-reference based on prime number algorithm

Electronics
2020-11-03 | Journal article | Author
DOI: 10.3390/electronics9111836
SOURCE-WORK-ID:

38d08cfa-7d16-4ac4-b086-01fc97f80476

EID:

2-s2.0-85095954788
Contributors: David A Humphreys; He Yu; Cong Wang; Maoliu Liu; Luqman Ali; Fanyi Meng
Source: check_circle
University of Bristol - PURE

An Evaluation of Distortion and Interference Sources originating Within a Millimeter-wave MIMO Testbed for 5G Communications

Radio Science Conference (URSI AT-RASC), URSI Atlantic
2018-06-01 | Conference paper | Author
DOI: 10.23919/URSI-AT-RASC.2018.8471493
SOURCE-WORK-ID:

183eae3d-85ed-46a8-aa2c-a7a2328f75fd

EID:

2-s2.0-85055828476

Part of ISBN: 978-90-82598-73-5
Contributors: Tian Hong Loh; David A Humphreys; David Cheadle; Koen Buisman
Source: check_circle
University of Bristol - PURE

Design and Evaluation of Nonlinear Verification Device for Nonlinear Vector Network Analyzers

IEEE Transactions on Microwave Theory and Techniques
2018-02 | Journal article
DOI: 10.1109/TMTT.2017.2762659
Contributors: Mohammad Rajabi; David A. Humphreys; Gustavo Avolio; Pawel Barmuta; Konstanty R. Lukasik; Troels S. Nielsen; Dominique M. M.-P. Schreurs
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Extension of NVNA Baseband Measurement for PA Characterization Under Complex Modulation

IEEE Transactions on Microwave Theory and Techniques
2018-02 | Journal article
DOI: 10.1109/TMTT.2017.2752172
Contributors: Yichi Zhang; Xiaotao Guo; Zhao He; David A. Humphreys; Lifeng Wang; Wei Zhao; Zilong Zhang
Source: check_circle
Crossref
grade
Preferred source (of 2)‎

Metrology State-of-the-art and Challenges in Broadband Phase-sensitive Terahertz Measurements

IEEE Proc
2017-06-01 | Journal article
DOI: 10.1109/JPROC.2016.2644108
Source: Self-asserted source
David A Humphreys

Ultrafast voltage sampling using single-electron wavepackets

Applied Physics Letters
2017-03-06 | Journal article
DOI: 10.1063/1.4978388
Contributors: N. Johnson; J. D. Fletcher; D. A. Humphreys; P. See; J. P. Griffiths; G. A. C. Jones; I. Farrer; D. A. Ritchie; M. Pepper; T. J. B. M. Janssen et al.
Source: check_circle
Crossref

Maximizing the benefit of existing equipment for nonlinear and communication measurements

Proceedings of the 2016 87th ARFTG Microwave Measurement Conference (ARFTG)
2016-06-30 | Conference paper | Author
DOI: 10.1109/ARFTG.2016.7501962
SOURCE-WORK-ID:

b61f3932-4ffb-448f-8a79-747a8c3a92d7

EID:

2-s2.0-84979619778

Part of ISBN: 9781509013081
Contributors: David A Humphreys; Antonio Raffo; Gianni Bosi; Georgio Vannini; Dominique Schreurs; Kibrom Negash Gebremicael; Kevin Morris
Source: check_circle
University of Bristol - PURE

Calibration of Wideband Digital Real-Time Oscilloscopes

IEEE Trans. Instrumen. Meas.
2015-06 | Journal article
DOI: 10.1109/TIM.2015.2407471
Source: Self-asserted source
David A Humphreys

Design and analysis of a verification device for the nonlinear vector network analyzer

85tht ARFTG
2015-05-22 | Conference paper
DOI: 10.1109/ARFTG.2015.7162895
Source: Self-asserted source
David A Humphreys

Principal Component Compression Method for Covariance Matrices Used for Uncertainty Propagation

IEEE Trans. Instrumen. Meas.
2015-02 | Journal article
DOI: 10.1109/TIM.2014.2340640
Source: Self-asserted source
David A Humphreys

Effect of time-delay errors on THz spectroscopy dynamic range

39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014
2014-09-14 | Conference paper
DOI: 10.1109/IRMMW-THz.2014.6956138
Source: Self-asserted source
David A Humphreys

Traceable Measurement of Source and Receiver EVM Using a Real-Time Oscilloscope

IEEE Trans. Instrumen. and Meas.
2013-06 | Journal article
DOI: 10.1109/TIM.2013.2238458
Source: Self-asserted source
David A Humphreys
grade
Preferred source (of 2)‎

Vector measurement of modulated RF signals by an in-phase and quadrature referencing technique

IEE Proceedings SMT
2006-11 | Journal article
DOI: 10.1049/ip-smt:20060002
Source: Self-asserted source
David A Humphreys

Transmission of active and passive optical reference signals over a 16 channel, 534.4 km WDM optical fibre network

IEE Proceedings Optoelectronics
2006-10 | Journal article
DOI: 10.1049/ip-opt:20060014
Source: Self-asserted source
David A Humphreys

Realization of a quantum standard for AC voltage: overview of a European research project

IEEE Transactions on Instrumentation and Measurement
2005-04 | Journal article
DOI: 10.1109/TIM.2004.843078
Source: Self-asserted source
David A Humphreys

Traceable RF peak power measurements for mobile communications

IEEE Transactions on Instrumentation and Measurement
2005-04 | Journal article
DOI: 10.1109/TIM.2004.843355
Source: Self-asserted source
David A Humphreys

Simulation and measurement of the response of Josephson junctions to ultra-short pulses

Superconductor Science and Technology
2004-04-28 | Journal article
Source: Self-asserted source
David A Humphreys

Comparison of photodiode frequency response measurements to 40 GHz between NPL and NIST

Electronics Letters
1995-03-02 | Journal article
DOI: 10.1049/el:19950228
Source: Self-asserted source
David A Humphreys

An algorithm for the removal of noise and jitter in signals and its application to picosecond electrical measurement

Numerical Algorithms
1993-10 | Journal article
DOI: 10.1007/BF02108665
Source: Self-asserted source
David A Humphreys

Calibration of optical modulators by optical down-conversion

Photonics Technology Letters
1993-09 | Journal article
DOI: 10.1109/68.257173
Source: Self-asserted source
David A Humphreys

Novel microwave reflectometer for accurate characterisation of high-speed photodiode optoelectronic response

Electronics Letters
1992-11-05 | Journal article
DOI: 10.1049/el:19921372
Source: Self-asserted source
David A Humphreys

Measurement of high-speed photodiodes using DFB heterodyne system with microwave reflectometer

High speed Electronics and Opto electronics Conference
1992-09-03 | Conference paper
DOI: 10.1117/12.137707
Source: Self-asserted source
David A Humphreys

Summary of results from an international high speed photodiode bandwidth Intercomparison

High-speed/High-frequency Optical Fibre Measurement Conference
1991-09-17 | Conference paper
Source: Self-asserted source
David A Humphreys

Temporal response of millimetre wave photodiodes by model fitting to scalar optical and vector return loss measurements

OFC'91 Conference
1991-02-18 | Conference poster
DOI: 10.1364/OFC.1991.WM10
Source: Self-asserted source
David A Humphreys

Model fitting of millimetre wave photodiodes to scalar optical and vector return-loss measurements

1990-12-06 | Conference paper
Source: Self-asserted source
David A Humphreys

Equalisation of high bandwidth optical systems by phase reversal modulators

IEE Colloquium on Microwave Optoelectronics,
1990-10-26 | Conference paper
Source: Self-asserted source
David A Humphreys

High accuracy frequency response measurements of mm-wave photodiodes using a DFB heterodyne system with a novel detection scheme

IEE Colloquium on Optical Detectors,
1990-01-19 | Conference paper
Source: Self-asserted source
David A Humphreys

Integrated optic system for high speed photodetector bandwidth measurements

IEE Colloquium on Optical Detectors
1990-01-19 | Conference paper
Source: Self-asserted source
David A Humphreys

Integrated-optic system for high-speed photodetector bandwidth measurements

1989-11-09 | Journal article
DOI: 10.1049/el:19891045
Source: Self-asserted source
David A Humphreys

High speed InGaAs/InP photodiodes for application to 40 GHz

OE Fibre/Lase conference (Boston)
1988-09-06 | Conference paper
DOI: 10.1117/12.960145
Source: Self-asserted source
David A Humphreys

Design and performance of phase reversal traveling wave modulators

Journal of Lightwave Technology
1988-06 | Journal article
DOI: 10.1109/50.4084
Source: Self-asserted source
David A Humphreys

GaInAs photodiodes as transfer standards for picosecond measurements

Optoelectronics, IEE Proceedings J
1988-04 | Journal article
DOI: 10.1049/ip-j:19880028
Source: Self-asserted source
David A Humphreys

Investigation of an optoelectronic nonlinear effect in a GaInAs photodiode, and its application in a coherent optical communication system

Optoelectronics, IEE Proceedings J
1988-02 | Journal article
DOI: 10.1049/ip-j.1988.0011
Source: Self-asserted source
David A Humphreys

Optimisation and experimental results for a Phase-reversal Travelling wave modulator

Proc. 4th ECIO conference
1987-05-11 | Conference paper
ISBN: 095122400X 9780951224007
Source: Self-asserted source
David A Humphreys

Measurement of absorption coefficients of Ga0.47In0.53As over the wavelength range 1.0-1.7 μm

Electronics Letters
1985-12-05 | Journal article
DOI: doi: 10.1049/el:19850839
Source: Self-asserted source
David A Humphreys

Preliminary report: compact covariance representation of waveform

Conference paper | Principal Investigator
Contributors: David A Humphreys
Source: Self-asserted source
David A Humphreys
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