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trusted by clients since 2008

Company Profile

Company Profile


VIPER RF is a microwave and millimetre-wave product company with headquarters in the United Kingdom.  The company was established in 2008 and has evolved from a design consultancy to become an established globally recognised MMIC supplier.

The company supplies GaAs & GaN MMICs as standard MMIC products and custom designs for applications from 1-150GHz.  VIPER RF has supplied MMICs and microwave module solutions into some of the most demanding commercial, defence and space markets.

The company performs production tests at wafer level and for packaged devices up to 110GHz in its Class 10,000 cleanroom.  In-house infrastructure allows for fast prototype chip-and-wire module assembly. 

VIPER RF collaborates with partners to develop optimal solutions for Clients.  The company has third-party design partnerships with world-leading semiconductor wafer manufacturers.  We work with packaging houses in the UK and off-shore to provide the best options in terms of cost and performance. 

Sales representatives assist us to identify and support our design-ins.   We work with R&D partners and leading universities to support the development of new products, and to ensure that the company is at the forefront of developments for new applications on emerging technologies.



2010 - First GaAs MMIC hardware product sales (UK)

2011 - First GaAs MMIC hardware product sales (outside UK)

2009 - Recruitment of key personnel into Engineering team

2013 - First sales representative agreement

2015 - First GaAs MMIC product above 100GHz developed (150GHz)

2017 - Purchase of premises with Class-10,000 clean room 

2018 - In-House automated package part test set-up commissioned

2019 - First overseas office opened

2021- VIPER RF France incorporated

2008 - First UK premises in Sunderland 


2016 - First GaN MMIC hardware product sales (outside UK)

2018 - In-House automated production wafer test commissioned

2019 - First  MMIC products enter Space and we are over the moon about it!

2014 - Expansion of design office to accommodate growth

2012 - Third-party design partnership with key wafer foundries announced

2010 - Expansion of design office to accommodate growth

2009 - Prototype Engineering laboratory with up to 110GHz capability

2008 - VIPER RF Limited is incorporated In U.K. 

Corporate & Quality


VIPER RF Limited Head Office   

Unit 22 Parsons Court, Welbury Way,  Aycliffe Industrial Estate

Newton Aycliffe, DL5 6ZE

United Kingdom


Registered Office:   c/o PINSENT MASONS, 13 Queen's Road, Aberdeen, AB15 4YL, Scotland, United Kingdom

 Registered Number: SC338855


29 Avenue des Peupliers

R.C.S. 898 015 185 RENNES
Code APE 2611Z


Our Quality management System is certified to ISO9001:2015

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We value equality and diversity in our workplace.  This helps us be innovative and creative. 

We adhere to a strict anti-Bribery & anti-Corruption Policies.

We work with our supply chain with the aim to comply with Modern Slavery, Child Labour & Conflict Minerals regulations.

Our Team
Dr Jim Mayock

CEO & Co-founder

Jim was RF Product Line Manager & Head of MMIC Design at Filtronic Compound Semiconductors.  He was in Central R&D at Filtronic plc, investigating new MMIC designs and module developments.  Jim was a Research Fellow at the University of Leeds investigating automobile radars.  He gained his PhD investigating millimetre-wave oscillator design techniques at the University of Leeds. 



Our management team has many years of experience in the RF & microwave industry from driving R&D to delivering hundreds of millions of semiconductor components into multiple industries.

David C Smith 

Director of Business Development

With over 40 years experience in the microwave and semiconductor industries, David's focus has been in business management in compound semiconductor technologies and markets. He has been instrumental in the emergence of GaAs technologies and products in the UK with his roles at Plessey Three-Five Group, GEC-Marconi Materials Technology, Filtronic Compound Semiconductors and RFMD UK.


David has been with VIPER RF since 2010. 

Thomas Le Toux

MD, VIPER RF  France

Thomas heads VIPER RF France, supporting clients in France and Europe.

He has been with VIPER RF since 2009, where he has driven the development and productionization of MMIC chipsets. Previously at Filtronic Compound Semiconductors and RFMD (UK,) his focus was on MMIC design & product engineering. He gained his Diplôme d’Ingénieur and DEA in Integrated Electronics at the graduate engineering school Télécom Physique Strasbourg in 2004.

Prof. Wolfgang Bösch

Non Executive Director

Established the Institute for Microwave and Photonic Engineering at Graz University of Technology in 2010. Previously Director of Business & Technology (RFMD UK). For 10 years he has been with Filtronic plc as CTO of Filtronic Integrated Products and Director of the Global Technology Group.  Wolfgang has held positions in the European Space Agency, MPR-Teltech in Canada and Corporate R&D group of M/A-COM in Boston. For four years he was with DaimlerChrysler Aerospace in Germany, working on T/R Modules for airborne radar. Dr. Bösch received his engineering degrees from the Technical University of Vienna and Graz. He finalised his MBA with distinction at Bradford University School of Management. He is a Fellow of the IEEE and a Fellow of the IET and has published  >70 papers and holds multiple patents. 

Dr Simon Chan

COO & Co-Founder

Simon held roles of Account Manager, Product Engineering Manager & Project Manager roles at Filtronic Compound Semiconductors.  He was also Product Engineering Manager at Agilent Technologies (optoelectronics), and developed silicon IGBT power devices at GEC Plessey Semiconductors. He gained his PhD from University College London investigating thin film diamond. He is a Chartered Engineer.


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