Principal RF Engineer in Cambridge at Sepura

Date Posted: 6/29/2020

Job Snapshot

Job Description

Working in a small, focused team, the Principal RF Developer will have a proven wealth of experience with RF design and high-volume product development, working to create the specification, design and testing of TX subsystems

Main duties will include:

  • Technical design and specification of discrete linear RF PA solutions in the 100MHz range
    > High efficiency compact handheld battery RF PAs ≤5W
    > Rugged Mobile RF PAs 10-25W
  • Technical requirements analysis
  • Complete TX chain specification, design and implementation
  • Integration of PA and TX into radio solution (software, mechanical, power supply)
  • PA ruggedness design
  • Component specification and sourcing
  • Block, subsystem and product integration testing
  • Resolution of design and integration issues
  • Type approval support
  • Support design, testing and troubleshooting in other areas of the product as appropriate
  • Technical support to end customers and subcontract manufactures
  • Progress reporting

Job Requirements



  • Minimum 10 years RF design experience
  • High volume product development
  • PA development for mobile and/or fixed site communications



  • Discrete linear PA design
  • Transmitter chain design
  • RF design
  • Analogue design
  • Handset design
  • Printed coupler design
  • RF simulation tools (e.g. Genesys, ADS, Microwave Office)
  • Portable product design
  • RF simulation tools (e.g. Microwave Office, ADS) for linear and non-linear simulation


  • 3G/4G design
  • GPS/WiFi/Bluetooth design
  • VCO/synth design
  • Receiver design
  • Cartesian loop transmitter design
  • Transmitter linearisation techniques e.g. pre-distortion (analogue/digital)
  • ADS simulation
  • CST Microwave Studio
  • Antenna design
  • Design for ESD protection
  • Design for EMC
  • Power supply design (analogue and SMPS)
  • Transmit converter specification (SNR, rates)
  • FIR filter design
  • MATLAB/Simulink



  • Communicates effectively with others across multiple disciplines
  • Works well in a small focused team, sometimes against tight deadlines
  • Conscientious, reliable and enthusiastic worker who takes pride in their work
  • Self-driven and motivated with ability to use own initiative and take a technical lead
  • Ability to work to a high level of quality with good attention to detail

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