Opportunities for permanent roles in a range of business sectors

Senior RF Design Engineer

Do you fancy being part of a collaborative, forward-thinking global leader in critical communication solutions? Sepura Ltd are currently recruiting for an RF Design Engineer to join their expanding engineering team and work on the development of mobile radio products. The RF Design Engineer would be involved in the whole lifecycle of product development from concept and prototype stages, through to production and support

The initial focus for this RF Design Engineer role will be on antenna development for broadband technologies, but the role is expected to include other areas of RF development based on the successful candidate's strengths. The right candidate will have a strong background in the specification, design and test of antennas for mobile products but will also have competence in other areas of RF design

Come and join Sepura Ltd at an exciting time of growth and enjoy a career within this innovative technology company, based in Waterbeach, Cambridge

Main duties of the RF Design Engineer include:

Initial focus is on the technical design and specification of antenna solutions in the 400MHz to 5GHz range

  • Technical requirements analysis
  • Custom antenna design and simulation both in isolation and when integrated into products, including the impact of other objects
  • Antenna integration into end product and validation of the RF performance
  • Liaising with mechanical engineers to integrate antenna solution into overall mechanical solutions
  • Component specification and sourcing 
  • 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 manufacturers 
  • Progress reporting 

It is expected that the successful candidate will be involved in other aspects of the RF design for either TETRA or broadband products, however there is some flexibility on the role depending upon the candidate's skills



  • Bachelor's degree


  • Masters or higher


  • Minimum 8 years' RF design experience, with at least 4 years' experience in antenna development
  • High volume product development



  • CST Microwave Studio
  • Multi-band antenna design/test for portable devices
  • Active antenna tuning
  • Design of diversity antennas
  • Antenna test and measurement techniques including TRP/TIS, efficiency etc.
  • RF design
  • RF simulation tools (e.g. Genesys, ADS, Microwave Office)
  • Portable product design
  • Design for mass production 

Highly desirable:

  • 3G/4G design
  • GPS/WiFi/Bluetooth design
  • VCO/synth design
  • Receiver design
  • Transmitter design 


  • Cartesian loop transmitter design
  • Transmitter linearisation techniques e.g. pre-distortion (analogue/digital)
  • Design for ESD protection
  • Design for EMC
  • Power supply design (analogue and SMPS)
  • Transmit converter specification (SNR, rates)
  • FIR filter design
  • MATLAB/Simulink

Personal attributes

  • Calm under pressure
  • Ambitious 
  • Flexible 
  • Enthusiastic