Chris Angove, Independent Professional Engineer

Chris Angove is a highly experienced and MSc qualified chartered electronics engineer specialising in electrical and electronics engineering. He manages and owns Faraday Consultancy Limited (FCL).

He has successfully completed assignments for several clients including the following:

Alcatel Networks Leonardo MW Cubic Transportation Safran Power
EADS Astrium BAE Systems C-MAC Micro Technology Plextek
Allen Vanguard UK Arqiva Media Axell Wireless Motorola
UTC Aerospace Raytheon Systems Mullard Space Science Lockheed Martin UK
ERA Technology ITT Defence Systems Thales UK DAE Nokia Telecommunications

Frequently Asked Questions

Contents

Who are you and what do you do?

How can you help my team/project/company?

Which clients/companies have you supported in the past?

Who is this guy Chris Angove?

Can I have a copy of Chris's CV?

Why should I use your services instead of those from company X?

What sort of work has been done for FCL or Chris Angove done for previous clients?

What about note keeping and documentation?

How can we be sure that we will retain the skills and knowledge gained whilst you are with us?

How can I be sure of confidentiality?

What is your company philosophy?

Do you provide services directly or through an agency?

How much will you charge?

Why can't you give me more details on your work with client X?

What facilities do you have?

What policies do you have in place for protection of the environment?

Scattering Parameters Smith Charts Do you really mean 'RMS power'
Cascaded stages References (books) References (articles/papers)
S and T Parameters Complex discrete Fourier transform Transmission lines
NF of a matched attenuator Phase locked loops S parameters (more)
Antennas Complex discrete Fourier transform of regular pulses RF design LTE/LTE-A Overview
Additive white Gaussian noise (AWGN) Fourier transform examples
Differential transmission lines

Frequently Asked Questions

Who are you and what do you do?

Chris Angove has had a passion for electrical and electronics engineering from an early age. He owns and manages Faraday Consultancy Limited (FCL). FCL provides professional engineering support to client companies across many sectors including: RF, microwave, analog and digital hardware design and development, broadcast and communications engineering, telecommunications, radar and defence systems engineering. FCL and Chris Angove support clients' projects for both commercial and defence equipment applications from hands-on circuit design through to major systems proposals and their implementation. FCL is registered in England and Wales (registration number 2938426) and is registered for Value Added Tax (VAT registration number GB 623 4028 72).

How can you help my team/project/company?

In today's environment, teams are routinely faced with challenging project milestones. Promises made must be met, otherwise personal commitments, the company's reputation and peoples' jobs may be at risk. FCL can provide valuable support to these companies very quickly and effectively. FCL may well have already achieved similar objectives with other clients and can bring a set of core skills, experience and knowledge.

Which clients/companies have you supported in the past?

To date, FCL and Chris Angove have supported several clients, including the following:

Who is this guy Chris Angove?

Chris has always been very interested in electrical and electronics engineering. He was brought up in Cornwall and went to The Humphry Davy Grammar School. After that he completed a telecommunications course followed by secondment to the Dubai Satellite Ground Station, United Arab Emirates. There he was on the 24-hour duty engineering team and performed regular maintenance and installation activities on the live international telecommunications equipment. The hardware included C-band liquid nitrogen cooled low noise amplifiers, satellite receivers, modulators, upconverters, high power amplifiers, uninterruptible power supplies, control/monitoring hardware and the antenna tracking equipment. His duties included maintenance of the station down to the three phase solid-state inverters, diesel generator sets, air-conditioning plants and temperature and humidity recording. He also supported planned maintenance at the nearby terrestrial back-haul site, whose facilities included VHF/UHF terrestrial links, microwave line-of-sight links and cable terminal equipment. Between shifts he chose to study and to further advance his understanding of satellite communications and the broader aspects of telecommunications.

When he returned to the UK he became a sponsored student on an honours degree (thin sandwich) course in Electrical and Electronics Engineering and completed it with an upper second which launched his career in electronics, communications and radar engineering. Shortly afterwards he successfully completed an MSc in Microwave and Optical Engineering at University College London. Since then he has held several senior engineering positions with respected leading corporates. He has been operating independently as a freelance professional engineer for several years and continues to support clients in various roles.

Can I have a copy of Chris's CV?

Certainly. Please contact Chris directly on +44 (0) 7989 305995. He will delighted to send you one and to explain how he believes he (usually represented by FCL) can help you. To elaborate on his skills and experience and to answer any questions you may have, he will be very pleased to meet you at a time and place convenient to you. Evidence of all the qualifications shown on the CV can of course be supplied.

Why should I use your services instead of those from company X?

Every contract has been a success: objectives and specifications met and exceeded, documentation delivered and a comprehensive set of indexed and referenced records and documents left with the client. Most contracts to date have started at 6 months or more and many were subsequently extended. But eventually of course all contracts have to end and Chris is delighted to have worked with all clients and has made many friends. People with these skills and experience are relatively few so names and reputations are remembered. In the case of FCL they are remembered for their hard work, reliability, adaptability and the consistently high level of professionalism delivered throughout. FCL is also delighted to have supported several clients on more than one occasion.

What sort of work has been done for FCL or Chris Angove done for previous clients?

The following is a summary of the various types of work encountered so far to support clients. Confidential and restricted information has been removed.

  1. RF (HF/VHF/UHF) Design and Development, Tasks and Familiarity
    • Hands-on fault finding and debugging on multi-layer and mixed dielectric PCBs, surface mount down to 0402 with supporting tools and facilities.
    • Evaluation of microwave sources (phase noise, discrete spurii, frequency stability, output power) over temperature.
    • VCOs (negative resistance and Colpitts): development, improving performance, especially phase noise at low temperatures.
    • Basic oscillator circuits designed around discrete bipolar transistors and JFETs: Colpitts, Clapp and Hartley architectures. [1], [2]
    • S-parameter calibrations, measurements, analyses and applications including: Rollet stability factor, unilateral and simultaneous conjugate match, narrowband and wideband matching. [3], [4], [5], [6], [7], [8], [9], [10].
    • Smith chart analyses (Z, Y and YZ planes): interpretation and matching using distributed and lumped elements.[11], [12], [13], [14], [15].
    • S-parameter and T-parameter processing for de-embedding measurement cable effects.
    • EMC pre-compliance: emissions and susceptibility measurements. Development, test and implementation of mitigation solutions.
    • High frequency Q-factor (VNA) measurements and lumped reactive component selection.
    • Low noise amplifiers: bipolar and FET: GaAs MESFET, HEMT and PHEMT (NF circles and optimum source noise match).[19], [20].
    • Intermediate power amplifiers (few watts, class A linear, B and AB push-pull) at HF and VHF.
    • PIN diode attenuators (bridged-T, pi, single and dual device packages).
    • Frequency hopping synthesizer (E-GSM): reduced parts count, rationalised PCB layers, improved grounding and layout, reduced cost and improved jitter performance.
    • PIN diode switches (high isolation) and phase shifters: performed detailed evaluation.
    • Microstrip, CPS, CPW and stripline/triplate controlled impedance lines (FR4 and Rogers/Duroid substrates): simulated and built.
    • Wideband transformers and baluns (HF/VHF): developed twisted wire and transmission line types on high frequency soft-ferrite formers (Sevick)
    • Space equipment hardware: development, evaluation, results analyses and processing (multi-port S-parameters).
    • Satellite ground station equipment: design and development (intermediate data rate C and Ku-band).
    • GPS receiver development (agile airborne application), bandpass sampling (undersampling).
    • Power combining/splitting: developed Wilkinson, branch line, Lange and rat race  / ring architectures.
    • IP3, P1dB, SFDR measurements, their interpretation and calculations for cascaded devices (Excel, ADS systems environment).
    • High speed ADC specification (Analog Devices).
    • Dual modulus synthesizers: development, loop filter calculations, programming (Texas Instruments, formerly National Semiconductor, chipsets).
    • Fractional N synthesizers: new (reduced size) die evaluation (GSM 900 MHz base stations).
    • Dual loop synthesizers: upgrade from switched crystal oscillators (reduced power, weight, space; airborne application, VHF/UHF).
    • Legacy (navigational) receiver upgrade: improved and rationalised RF layout, reduced parts count (upgraded a module supplied 20 years earlier).
    • Passive (LC) sampling bandpass filter design from scratch at HF/VHF using filter tables (Williams - Taylor).
    • Characterisation of 'soft' ferrite materials for VHF (Siemens/EPCOS, Fair-rite: various geometries).
    • Designed directional couplers for VSWR monitoring at VHF and UHF (portable transceiver application).
    • Design of high isolation double balanced mixers (ferrite torroids, VHF LO), large HF OTH radar system.
    • Design of a high Q absorptive notch filter (critical transmitter spurious measurements at HF).
    • Developed a Schottky diode envelope detector circuit and high slew-rate video stages for a radar receiver (Avago 282X).
    • Designed a constant delay slope video low pass filter (for high percentage bandwidth IF detection).
    • Evaluated successive detection logarithmic video amplifiers (SDLVAs) and specified improved versions at half the original cost.
    • EMC (BS EN 50121) and Low Voltage Directive (BS EN 60950) pre-compliance tests (transportation environment).
    • Solar radiation performance testing of near field communications (NFC) contactless card reader terminals (transportation environment).
    • Evaluation of cable shielding effectiveness for EMC pre-compliance: development of test methods, measurements and analyses across 1 MHz to 18 GHz
  2. Electromagnetic Theory and High Speed Circuit Designs
    • Maxwell's equations applied to perfect and realistic insulators and conductors: cartesian, spherical and cylindrical co-ordinate systems.
    • Vector operators, identities and their interpretation: unit vectors, Div, Grad, Curl, Dot Product, Cross Product.
    • Near and far field wave propagations, skin depth, proximity effect, plane wave reflection and transmission loss.
    • Complex variables, representations and significance: Euler, DeMoivre, Poynting vector, complex power, power flux density.
    • Transmission line even and odd order modes: differential and common mode impedances and excitations, EMC impacts.
    • Rectangular and circular waveguide modes: resonant and travelling, TE and TM modes.
    • Transmission lines: coaxial, shielded and unshielded twisted pair: screening effectiveness, transfer impedance.
  3. Microwave, High Speed Digital and Millimetre Wave Design and Development
    • Alumina microstrip development of GaAs FET LNAs (K/Ku-band space equipment).
    • High speed differentially excited balanced lines: design, measurements and analysis (Hall & Heck).
    • High speed low voltage differential signalling (LVDS) and current mode logic (CML) lines: design for minimised differential delay (skew).
    • SSPA and TWTA specifications: their interpretation (power handling and efficiency, space platform system).
    • Space hardware receivers evaluation and development (TV broadcast satellite).
    • Lange couplers, branchline couplers (design and evaluation, Ku-band mixers).
    • Designed Cassegrain and front-fed parabolic reflector antennas and evaluated them (far field at W-band).
    • Designed a range of dual mode (smooth conical) Potter horn antennas (Ka-band Gaussian profile illumination).
    • Designed and developed various passive millimetre wave waveguide structures using electro-formation techniques.
    • Beam waveguides: via refractive media (polyethylene lenses) and ellipsoid surface reflective transmission.
    • Designed quasi-optic (Gaussian and Gaussian-Laguerre) structures for 2D and 3D monopulse beam waveguide antenna tracking feeds.
    • Developed substrate based VNA probe interface (calibration and measurement) solutions.
    • Evaluated LNAs and downconverters using multi-chip modules.
    • Developed a precision VNA phase/amplitude interface (lens antenna measurements using the HP 8510 VNA).
    • Developed a set of absorptive antenna aperture isolators for an ECM product that improved the receiver threshold by 20 dB across X-band and K-band).
  4. Supporting Skills and Experience
    • Switched mode power supplies (SMPS) buck/boost: specification, heat dissipation and mechanical (seaborne product, unusual voltages).
    • High current 28V aeronautical power generation and distribution (reliability and mitigation of emissions).
    • ADC interfacing: anti-alias filtering, offset/gain setting (spectrum analyzer interface).
    • Linear low power regulators: general specification and use.
    • Design of audio amplifiers, buffer circuits and general purpose operational amplifier circuits.
    • DC power reduction techniques for battery operation, component selection for variety reduction (low-cost portable transceiver application).
    • Interfacing to PC architecture: (Gigabit Ethernet, GP-IB/IEEE-488, RS232/422/485), PIO cards (National Instruments).
    • Microchip Technology PIC 24FJ (16 bit) and 32MX (32 bit) micro-controllers and DSP ICs: X-IDE embedded programming in 'C' and some assembly language.
  5. Systems Level Development, Implementation and Operations
    • Improved terrestrial broadcast quality of service (QoS) figures for MF and VHF radio, UHF TV and DAB.
    • RF over optical fibre system development and implementation (DWDM, λ = 1550 nm, seaborne application).
    • Specification and evaluation of fibre optic components: EDFAs, Mach Zehnder optical intensity modulators, circulators, WDM filters (add-drop multiplexers), laser diode sources and control ICs (RF over optical fibre seaborne demonstrator).
    • Proposed high level satellite payload DSP architectures to replace analogue ones (design study, presentation).
    • Multiple port amplifiers, as an alternative to switched redundancy on satellite payloads (design study and presentation).
    • Proposed high level active transmit and receive antenna arrays to replace passive antennas (X/Ku bands).
    • HF over-the-horizon radar systems: receiver and LO distribution, design support and implementation.
    • Provided engineering support for communication equipment proposals: transportable digital point to point LOS links, HF broadcast stations, satellite receivers and IF group delay equalisers.
    • Propagation studies and performance predictions for HF channels, VHF (Bullington) and microwave LOS links.
    • Frequency planning to manage intermodulation distortion and harmonics (obscure products).
    • Interfacing to SDH/SONET data rates (ECL, CML, LVDS on FEC modules with Reed Solomon 15/14 coding).
    • Developed program suite for digital LOS link performance predictions.
    • Authored worst case analysis (WCA) reports and failure mode, effects and criticality analyses (FMECA).
    • Systems analysis support for performance improvement of an ELINT radar receiver (to zero-IF).
    • Fading channel modelling under heavy LOS/NLOS multipath, multi-carrier OFDM WiMAX-like access.
    • Rayleigh and Rician fading models using Matlab.
    • Co-site interference cancellation techniques.
    • Analysis of production test data, associated investigations and presentation of recommendations to improve the reliability of future test results.
  6. CAD Applications and Languages Experience
    • Microsoft Office 2019 Pro Plus: Word , Excel, Access, PowerPoint
    • Microsoft Excel 2019 with VBA
    • Visual Basic 2015 Express
    • Mathcad 15
    • Matlab R2020b
    • Matlab Toolboxes and Support Packages (2020b):
      • Simulink V10.0
      • Antenna Toolbox V4.1
      • Communications Toolbox V7.2
      • Control System Toolbox V10.7
      • DSP System Toolbox V9.9
      • Data Acquisition Toolbox V4.0.1
      • Instrument Control Toolbox V4.1
      • Parallel Computing Toolbox V7.1
      • Phased Array System Toolbox V4.2
      • RF Blockset V7.3
      • RF Toolbox V3.7
      • Signal Processing Toolbox V8.3
      • Simscape V4.7
      • Simscape Electrical V7.2
      • Simulink Control Design V5.4
      • Spreadsheet Link V3.4.2
      • Symbolic Math Toolbox V8.4
      • Instrument Control V4.1
      • Wireless Waveform Generator
    • Visual Basic for Applications (VBA)
    • Agilent Advanced Design System (ADS)
    • Microwave Office
    • Visio Professional 2019
    • Altium Designer (Viewer)
    • LTSpice XVII
    • Simetrix Simulator 8.2
    • Eagleware/Genesys 2005
    • Ansoft Designer 2.2.0
    • ANSI-C (David Himmel)
    • Microsoft Visual C++ (2015)
    • Linux Ubuntu and Lubuntu Linux distros
  7. Project Management, Documentation and Presentations
    • Product lifecycle management (Siemens Teamcenter and PTC Windchill).
    • Authorship of customer deliverable and formally configured design proving specifications, test plans, test specifications and requirements definitions.
    • Writing application notes, user manuals, datasheets.
    • Presentations to specialists, critical peer groups and management. Engineering support 'point of contact'.
    • Day to day technical notes, formal and informal progress reports (registered engineering logbooks).
  8. Test Equipment Automation: Data Acquisition, Reporting, Debugging and Results Processing
    • Interfaces: HPIB/GPIB/IEEE488.2, WiFi/Ethernet/Gigabit/RJ45, RS-485, RS-232, TTL and ad hoc.
    • Multiport S-parameter measurement: full vector processing using VBA and Matlab 2020b: gain, return loss / VSWR, microwave test results processing and analysis.
    • Rollet stability factor, group delay (Excel with analysis Toolpak, complex functions).
    • S-parameter and T-parameter conversions, interpretations and processing (Matlab 2020a RF Toolbox)
    • AM noise, phase noise and jitter measurements (HP/Agilent 3048) [16], [17], [18].
    • Electrical performance evaluation over temperature and vacuum.
    • Conducted emissions and susceptibility, performance pre-complaince measures. (MIL-STD-461E).
    • Radiated emissions and susceptibility, with debugging (MIL-STD-461D).
    • PLL lock time measurements (synthesizer phase lock and frequency lock).
  9. Test Equipment Familiarity
    • Vector network analyzers (swept CW pulsed and non-pulsed): HP/Agilent (many), Keysight N5242A PNA-X, Rohde & Schwarz (ZVB 8).
    • S-parameter test sets including coupling for high power characterisations.
    • Power meters including fast envelope sensors: Agilent N1911A/N1912A.
    • Spectrum analyzers (traditional and real time ADC/DSP types) HP/Agilent 4402B, Tektronix 6106A.
    • Vector signal generator: Keysight N5182A 2/4 port and interpretation for multiport DUT measurements.
    • Ecal calibration: reference plane conversion for various connector types.
    • Manual (mechanical) coaxial calibration kits, including sliding load.
    • S-parameter measurements across differing connector types and genders: detailed analyses.
    • High speed digital storage oscilloscopes: LeCroy SDA 3010: radar pulse envelope measurements.
    • Noise figure meters and analysers (SSB, DSB, with and without frequency conversion): Y Factor (HP 346B / 8970B, PNA-X cold source).
    • Precision reflectometers and test jigs for arbitrary load and load-pull (Maury Microwave slide screw tuner).
    • Automatic test equipment (ATE) control and data acquisition (DAQ) (Gigabit Ethernet, GP-IB/HP-IB, National Instruments PCI and USB interfaces).
    • Matlab 2020b instrument server and scripts.
  10. Ongoing Research
    • High speed baseband and (QAM) modulated transmission.
    • Embedded C and assembly language: Microchip 24FL (16 bit), 32MX (32 bit) microcontrollers.
    • Digital signal processing fundamentals (including fast Fourier and Laplace transforms).
    • Coded orthogonal frequency division multiplexing (COFDM).
    • WiFi (IEEE 802.11), WiMAX (IEEE 802.16), mesh wireless networking.
    • IEEE 802.15.4 low data rate encrypted wireless personal area networks (WPANs).
    • Software defined radio, especially Matlab using Simulink.
    • Newer semiconductor technologies: HEMT, PHEMT, LDMOS, GaN.

What about note keeping and documentation?

FCL follows the record keeping and documentation requirements of the client. Usually a traceable engineering log book of some form, physical or electronic, is required in which is recorded: day to day work notes, equipment setups and serial numbers, contact details of suppliers, sources of information (references to websites, textbooks, papers, equations etc.); test results summaries and calculations. This dataset is left with the client at the end of the contract. FCL's default policy on note keeping is to record sufficiently detailed notes in such a way that tests, investigations etc. can be repeated reliably at a later date, perhaps after the contract has ended. FCL has received many positive comments about the detail and quality of both its routine note keeping and the formal reports that it has produced.

FCL regards the production of quality documentation as an essential part of its services to the client. FCL's documents are relevant, concise, free from rambling, repetition and unnecessary words. Opinions are not expressed without reliable evidence that the reader may follow up. Perhaps with the exception of Ohm's Law, no formula is stated without references to reputable text books and/or peer reviewed papers. FCL maintains high skill levels of the industry standard word processing, spreadsheet, graphics, drawing and other applications to support the documentation. Quite often a client's deliveries include well written and correctly configured and reviewed documents, accceptable to the customer. FCL has experience in writing most types of deliverable specification documents (requirements, design proving, test, acceptance) for many types of equipment.

How can we be sure that we will retain the skills and knowledge gained whilst you are supporting us?

The client will benefit both from the skills that FCL has built up working in similar industries elsewhere and from the R&D work FCL engages in to prepare for future contracts. Furthermore, unless the client requires otherwise, FCL will leave a set of very comprehensive documents with the client. On most contracts one of the client's senior engineers or project managers works directly with FCL's representative to ensure that the best possible support is given. FCL will work with him/her to ensure that everything required is transferred, hardware demonstrated, questioned answered and all documents supplied.

How can I be sure of confidentiality?

FCL respects the clients' proprietary work and always assumes the highest level of confidentiality. It will never release any of this information elsewhere without the explicit and unambiguous written permission from the owner. FCL is happy to sign any reasonably worded confidentiality, non-disclosure or similar agreement with the client.

What is your company philosophy?

To provide a consistently delivered and highly professional service.

Do you provide services directly or through a third party?

Either. If either the client contacts FCL directly or vice versa, and this results in FCL providing the client with services, FCL will normally invoice the client directly. An exception might be in the unlikely event that FCL has a current exclusivity agreement with a particular third party relating to that client.

How much will you charge?

A competitive market rate. This would normally be delivery-based because FCL works on a business to business basis and FCL can offer increasing discounts for a longer engagements. The savings in time and travelling expenses for all off-site work will be passed on to the client by way of a reduced rate. These will also reduce the client's costs, reduce traffic congestion and reduce pollution. There will be less environmental damage and extra available time to support the client which would otherwise have been spent travelling.

Why can't you give me more details on your work with client X?

The details of FCL's work with all clients are strictly confidential, even if no formal confidentiality agreement has been signed. If a prospective client wishes to contact one of FCL's previous clients, this may be possible once permission is given.

What facilities do you have?

FCL runs a laboratory equipped for electronics design and development work currently up to about 6 GHz. For higher frequencies, test equipment is hired as required. The actual equipment used would be determined by the client's requirements and agreed with the client before starting the contract.

What policies do you have in place for protection of the environment?

FCL supports many policies to protect the environment, including the following:

References

  1. Gonzalez, Guillermo; Microwave Transistor Amplifiers - Second Edition, Prentice Hall, New Jersey, pp. 411-413.
  2. Malvino, Albert Paul Ph.D.; Electronic Principles, Tata McGraw-Hill Publishing, New Deli, pp. 544 - 546, (1982).
  3. Gonzalez (op. cit.); pp. 240 - 247.
  4. Pozar, David M.; Microwave Engineering - Third Edition, John Wiley & Sons Inc. pp. 543 - 548.
  5. Vendelin, George D.; Design of Amplifiers and Oscillators by the S-Parameter Method, John Wiley & Sons, pp. 20 - 24 (1982).
  6. Gonzalez (op. cit.); pp 240 - 247.
  7. Pozar (op. cit.); pp 222 - 227.
  8. Vendelin (op. cit.); pp 24 - 26.
  9. Gonzalez (op. cit.); pp 112 - 141.
  10. Vendelin (op. cit.); pp 27 - 35.
  11. Kennedy, George; Electronic Communication Systems; McGraw-Hill Kogakusha Ltd.; pp 228 - 239.
  12. Pozar (op. cit.); pp 64 - 69.
  13. Gonzalez (op. cit.); pp 93 - 112.
  14. Vendelin (op. cit.); pp 71 - 91.
  15. Chipman, Robert A.; Transmission Lines, Schaum's Outline Series in Engineering, McGraw-Hill Book Company, pp 71 - 91.
  16. Robins, W. P.; Phase Noise in Signal Sources, Peter Peregrinus Ltd.
  17. Gardner, Floyd M.; Phaselock Techniques - Second Edition; John Wiley & Sons; pp 100 - 105.
  18. Carlson, A. Bruce et. al.; Communication Systems, An Introduction to Signals and Noise in Electrical Communication - International Edition; McGraw-Hill Higher Education; pp 425 - 426.
  19. Gonzalez (op. cit.); pp 299 - 321.
  20. Pozar (op. cit.); pp 557 - 561.