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Tue, 28 Jun 2022 23:02:12 +0000
Virgin Orbit says it’s ready for a nighttime launch for the U.S. Space Force as it attempts to get into a more frequent rhythm of building and launching vehicles. The post Virgin Orbit ready for first night launch appeared first on SpaceNews.
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Tue, 28 Jun 2022 15:38:44 +0000
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  • CV: RF designer

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    Personal information
     Name:<withheld>
     Age:<withheld>
     Country:<withheld>
     Location:<withheld>
    Contact information
     Email:<withheld>
     Phone:<withheld>
     Mobile:<withheld>
    Candidate Profile
     Date Submitted:20-04-2011
     Last Modified:20-04-2011 (09:41)
    Job information
     Current job:RF designer
     Employment Term:Temp/Contract
     Job location:Europe only
     Date available:immediately
     Industry:
     KeywordsRF designer, microwave designer, systems designer
    CV

    Nationality : British

    EDUCATION

    1970-73 St Mary Abbots Primary School, Kensington Church Street, London W8 1973-76 Holland Park School, Holland Park, London W11 1976-78 Lindisfarne College, Ruabon, Clwyd, North Wales 1978-79 Modern Tutorial College, Kilburn Lane, London W9 5 ‘O’ levels obtained 1979-81 Hammersmith & West London College, Brook Green London W14 ‘A’ levels obtained : Maths grade C : Physics grade C 1981-85 Leeds Metropolitan University, Calverley Street, Leeds LS1 Bsc (Hons) : Communication & Electronic Engineering Final year subjects : Analogue Electronics : Communication techniques : Signal Theory : Communications Systems Final year project : Design of a 1-2GHZ amplifier Experience Summary Microwave and Radar Thales, Ground Surveilance Radar, Germany 2009 to 2010 - Receiver systems design - Front end design (LNAs and BPF) - First IF design at 1GHz - Second IF design at 160MHz - BFP design - Board layout design 2003 to 2006 Continental, Germany - 22GHz DRO design - Antenna design - Receiver design 2002 to 2003 Robert Bosch Leonberg, Germany - 22GHz LNA design - Voltage Controlled Oscillator design - 1GHz LNA design - 22GHz mixer Telecomms, Handsets 2007 to 2010 Stericsson Mobile Platform, Lund, Sweden - Reference design of band I, II/IV, V and VIII TX chain - Reference design of band I, II/IV, and VIII TX chain - Reference design of band IV, and VIII TX/RX chain - Switch Mode PA for bands I, II and V - Reference design of GSM/EDGE TX path chain 2006 to 2007 Sony Ericsson Mobile Communication, Lund, Sweden - TX design and development of GSM/EDGE mobile handset Telecomms, Power Amplifiers 2010 to 2011 NXP Semiconductors Neijmegen - Design of linear 500W PA - Design of 250W PA 2003 EADS, Stockport Manchester - Development of a 120Watt linear X band SSPA 1999 to 2002 Ericsson Radio Access., Kista, Stockholm, Sweden. - Linear EDGE BTS Power Amplifier design 1997 to 1999 Alcatel Lucent, UK - BTS Linear WCDMA PA design. Telecomms, BTS 1999 to 2002 Ericsson Radio Access., Kista, Stockholm, Sweden. - BTS TRX design 1997 to 1999 Alcatel Lucent, UK - BTS TRX design Telecomms, BTS filters 2011 Teracom, Horby, Sweden - Design and Development of BTS Q plexor combiner. 1997 to 1999 Alcatel Lucent., Chippenham, Wiltshire, England - Design of Cavity Duplexors Telecomms, Antennas 2002 to 2006 Continental, Germany - Inverted F Antenna design - Magnetic Loop Antenna design. Software design experience Agilent ADS 2K to 2K10, HFSS 11

    WORK EXPERIENCE

    February 2011 to present Teracom, Horby, Sweden Design and Development of BTS Q plexor combiner, the work included the fllowing 1- Development of Q Plexor cavity filters covering GSM 900 and 1800 bands, as well as WCDMA and LTE bands. 2- Development of LTE filter. The filter was fully compliant with specification over frequency band and temperature.

    February 2010 to February 2011 NXP Semiconductors Neijmegen, Power Amplifier Designer Design of 500W PA to be used for DVB-T application. The work involved the following 1- Transistor internal matching circuit design, the transistor was to meet specification for PAE, IMD, Gain and Return Loss 2- Load pulling of transistor 3- Design of application board based on load pull parameters to meet load pull requirement and specification for PAE, IMD, Gain and Return Loss Design of 250W PA to be used for Pulsed Radar application. The work involved the following 1- Transistor internal matching circuit design, the transistor was to meet specification for PAE, IMD, Gain and Return Loss 2- Load pulling of transistor 3- Design of application board based on load pull parameters to meet load pull requirement and specification for PAE, IMD, Gain and Return Loss

    February 2K9 to February 2010 Thales Ground surveilance Radar, Pforzheim, Germany 17GHz Pulsed Radar Receiver design 1- Receiver systems design 2- Front end design 3- LNA design 4- 16GHz BPF design 5- First IF design at 1GHz 6- Second IF design at 160MHz 7- BFP design 8- Board layout design 9- Verification

    April 2K7 to February 2009 Stericsson Mobile Platform, Lund, Sweden, Reference design of band I, II/IV, V and VIII TX chain to be used as part of handset, the design involved the following 1- System design of TX chain 2- Specification of FEM, DPX, and PA 3- Circuit board layout 4- TRX and PA matching network design 5- Verification and development of TRX board Reference design of band I, II/IV, and VIII TX chain, to be used as part of a PC module the design involved the following 1- System design of TX chain 2- Specification of FEM, DPX, and PA 3- Circuit board layout 4- TRX and PA matching network design 5- Verification and development of TRX board Reference design of band IV, and VIII TX/RX chain, to be used as part of a handset the design involved the following 1- System design of TX/RX chain 2- Specification of FEM, DPX, TX filters and PA 3- Circuit board layout 4- TRX and PA matching network design 5- Verification and development of TRX board Switch Mode PA for bands I, II and V. The work involved the following 1- TX System design incorporating the PAs for above bands 2- Modification proposals for TX power control algorithm 3- Verification of TX 4- PA matching network design Reference design of GSM/EDGE TX path chain, to be used as part of a handset the design involved the following 1- System design of TX chain 2- Specification of GSM/EDGE PA 3- PA matching network design 4- Circuit board layout 5- Verification and development of TX path

    April 2K6 to April 2K7 Sony Ericsson Mobile Communication, Lund, Sweden 1- Design and verification of TX path for GMSK/EDGE mobile phone 2- Design and verification of: filtering interface between direct conversion TRX 3- chip and PA. The filtering was to ensure SDM limits were met over all bands for GMSK/EDGE schemes. 4- Design of network to ensure Second Harmonic compliance of phone over all operating frequencies. 5- PA Output matching network for EDGE 900 and 1800/1900 bands. The focus was on PA linearity and second harmonic supression.

    October 2003 to April 2K6 Continental, Germany 22GHz DRO design, used for Blind Spot detection in cars overall design of DRO plus temperature compensation 2- Design of circuitry for temperature compensation of 22GHz Blind Spot Radar 3- AGC design for Blind Spot Radar. Antenna design 1- Design and development of a 2.45GHz Inverted F antenna. 2- Design and development of: 440MHz and 880MHz magnetic loop antennas. Receiver design Design and development of a 400MHz anti theft device for automotive application. My responsibility included system and board design of receiver. On a component level I was responsible for the design of : 1- RF section 2- LNA 3- Gain control Citcuitry 4- IF section 5- IF filters

    April 2003 to October 2003 EADS, Stockport Manchester Development of a 120Watt X band SSPA, my involvement included 1 - Divider, combiner development 2- Specification of PA modules required for the unit 3 - Design of PCB layout 4- Verification

    May 2002 to February 2003 Robert Bosch Leonberg Technical Lead in Short Range Radar Group. My responsibilities included, Design of a (22-26)GHz LNA. The LNA formed the front end section of a Automatic Cruise Control receiver unit. 1- Design of a 2.35GHz Low Noise oscillator 2- Design of a DC-1000MHz broadband Low Noise amplifier 3- Investigation of design of 1.35GHz to 3.35GHz Low Noise Amplifier 4- Investigation into bandwidth extension of a (22-26) GHz homodyne mixer

    March 99 to Feb 2002 Ericsson Radio Access., Kista, Stockholm, Sweden. Principle (consultant) design Engineer assigned to Base Station design group. My team leader responsibilities included the daily technical running of a small team engineers My design responsibilities included: Design of 850 Mega Hertz Linear EDGE Power Amplifier. The amplifier had to meet the following specification: Frequency band of operation 869 to 894 Mega Hertz Output power capability 44.7dBm mean with a peak to mean ratio of 4.2dB Total gain of 31dB through the band Efficiency of 30% Amplitude variation of less than or equal to 1dB Experience gained: Linear PA design. Ensuring linear PA performance without reverting to the use of external linearisation techniques. Initial investigations into the design of a 90W final stage amplifier to be used as part of a Multi Carrier PA, the amplifier worked off a 26V Voltage rail. The aspects of the amplifier that were investigated were: Selection of optimum output, input matching network and bias point (current) for best EVM, compression point, output power, efficiency, and adjacent channel performance. Experience gained: General PA design. MCPA final stage design considerations. Load pull measurement. The design of the gain blocks used as part of a linearisation section of GSM/EDGE PA. The linearisation technique used was cartesian feedback. Experience gained: Awareness and overall knowledge of different techniques used for linearisation of PA’s. Linearity aspects of the feedback path. Ensuring linearity of the feedback path. Temperature effects and temperature compensation techniques The Transmit chain design for a dual mode (GSM/EDGE) base station unit. The task involved the following: Selection and matching of RF filters, attenuator and amplifiers with particular emphasis placed on linearity (low EVM ) and flatness of the chain. The system was to be capable of transmitting both a conventional GSM signal as well as EDGE signal (EDGE signal peak to mean ratio was 3.50dB). Experience gained: High linearity transmitter design . General transmitter design aspects and consideration both at systems and component specification level. The design of an external VGA (variable gain amplifier) to be used as part of a transmitter for a GSM 1800MHz/1900MHz Base station radio. The task included the following: The system design of the VGA, the system design was to take into account worst and best case tolerances for components. The design of RF amplifiers having a minimum gain of 15dB working into a filter load. The design of a RF final stage amplifier, the amplifier had gain of 12dB and a 1dB compression point of 21dBm, the amplifiers output was matched for maximum output power. All amplifiers worked from a 7Vsupply rail. The specification and sourcing of RF filters and attenuators. The design of interstage matching networks for the VGA with the goal of achieving best performance. Debugging of Base Station radio board. Experience gained: General transmitter design aspects and consideration both at systems and component specification level.

    February 1997 to March 1999 Alcatel Lucent., Chippenham, Wiltshire, England Contract design Engineer Design and development of 2.4GHz Cavity Duplexor used for WLAN BTS. Design and development of 1.9GHz cavity Duplexor used for WLAN BTS The Duplexors was fully compliant with specification over frquency band and temperature. My other responsibilities included the redesign of a 1.9GHz transmitter to be used as a customer interface unit in a ‘WCDMA’ system with a peak to mean ratio of 12dB. The transmitter was fully FCC specification compliant and operated over the temperature range -45 to +75 Celsius. The tasks included the following: · Design of a class ‘A’ amplifier · Design of a pre amplifier with a gain of 10dB · Design of low signal RF amplifiers. · Development of RF and IF variable attenuators; · Design of Local oscillator buffer amplifiers used to drive the LO port of a mixer. · Design of IF amplifier gain of 20dB. Input and output match 50 Ohm. · Design of IF variable gain amplifier used for output power compensation of the transmitter over temperature. · Image response improvement of receiver. · Trouble shooting and design verification writing of the transmitter, receiver and synthesisers. Design of low noise front end amplifier with a center frequency of 1880MHz. Redesign of first and second IF stages of a base station transmitter unit. Experience gained: General linear transmitter design with particular emphasis on achieving spectral mask specification of a WCDMA system with a signal peak to mean of 12dB. General receiver design. Temperature effects and temperature compensation techniques.

    February 1996 to March 97 Philips Mobile Communications Ltd., Cambridge Contract design Engineer My responsibility was the design of a high stability 930MHz third overtone Crystal Oscillator for pager application. Experience gained: High stability Crystal Oscillator design.

    November 1993 to December 95 Intel Semiconductors Ltd., Swindon Design Engineer As design engineer assigned to RF IC design group my responsibilities included the following: The design of a low noise 900MHz, 35MHz bandwidth amplifier to be used as the front end to a receiver chip. Experience gained: design of: LNA’s, current mirrors, mixers. General chip design.

    October 1992 to November 1993 C-Mac Quartz Crystals Ltd., (formerly STC Quartz Crystals) Senior RF Design Engineer My responsibilities included the following: · Design and development of a 1.03GHz Oven Controlled Crystal Oscillator. · Design of a 44.736MHz third overtone voltage controlled Crystal oscillator. · Design of a 155MHz Voltage Controlled Crystal Oscillator. Experience gained: High stability Crystal Oscillator design

    December 1991 to September 1992 Harrison Goodman Ltd., London Director Due to family commitments I was required to take time out from my professional career to take over the management of a family run import / export business. Experience gained: Commercial awareness.

    December 1987 to October 1991 Marconi Instruments Ltd., Stevenage Design Engineer I was assigned to the RF group to design and develop an octave wide frequency doubler covering S and C bands. The design involved the following tasks: · system and component design specification · the design of a frequency doubler · the development of third octave filters · the design of a balanced amplifier covering the required band. The balanced amplifier met the following specifications across the band: · gain of 26dB · input and output return loss of 12dB or better over the band · output harmonic level of less than -30dBc · minimum output power of 24dBm · gain flatness of less than 2dB · the design and development of a two octave Wilkinson power divider. The divider was used as part of a peak power detector; · the design and development of a broad band (10-1500MHz) amplifier. · the design and development of a broad band attenuator. Experience gained: Broadband amplifier, attenuator, filter design. Frequency doubler design. Frequency doubling techniques.

    September 1985 to December 1987 Marconi Communication Systems Ltd., Chelmsford, Essex Design and Development Engineer My responsibilities included the following: · The design and development of a high frequency and amplitude stability dielectric resonator oscillator: operating temperature range -5 to +60 Celsius, operating frequency 6.1375GHz. · The design and development of a 6GHz to 70MHz frequency downconvertor. · The development of 6GHz and 4GHz interdigital rod resonator filters. Experience gained: Receiver architecture specification and design, to component level. Filter design.


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