The Design Team

Names, photographs and brief biographies for the members of the Plextek RFI design team.

Andy Dearn


Andy graduated from Loughborough University of Technology in 1985 with a BSc in Engineering Physics. He began work at the Microwave Division of Ferranti International. Here he worked on many varieties of Microwave oscillators and sources, before working on some of the very early GaAs MMICs. In 1991 he joined GEC Marconi Materials Technology where he worked on many GaAs MMIC designs. These included single chip DBS receiver ICs, wireless transceivers and research projects on high frequency PHEMT ICs, including integrated 77GHz collision avoidance radar ICs.

In 1997 he joined Plextek, becoming a member of the RF Integration Group, which became a separate line of business in November 2012. Whilst at Plextek Andy has designed a wide range of ICs in GaAs and GaN technologies. These have included oscillators, amplifiers, mixers and switches (PHEMT based and mm-wave PIN diode designs), as well as highly integrated transceivers at Ka-band. Andy has been involved in IC design (including EM simulation), MMIC layout, module design and RFOW test across the whole microwave and mm-wave spectrum. He has published numerous papers, and currently lectures on the Oxford University Practical RF/Microwave design course. He is a Chartered Engineer and a member of the IET.

Contact Andy via email: icon_mailto Andy Dearn

Graham Pearson


Graham graduated from Durham University in 1984 and started work for Thorn EMI Electronics. Whilst at TEE he studied for a part time MSc in Microwaves and Modern Optics at University College London which he completed in 1988. He carried out the design, development and integration of components, including waveguide and GaAs ICs, for mm-wave Radar in the 35GHz and 94GHz bands. In 1999 he joined Plextek, becoming a member of the RF Integration Group, which became a separate line of business in November 2012. He has been involved in the detailed design and development of mm-wave and microwave components and modules in a range of technologies including, LTCC, MIC, MMIC and waveguide. His MMIC design activities have included broadband Ka-band amplifiers for multi-function receiver and transmitters, E-band VVAs, V-band amplifiers and high linearity GaN switches and attenuators.

Contact Graham via email: icon_mailto Graham Pearson

Liam Devlin


Liam graduated from Leeds University in 1988 and started work for Philips Research Laboratories where he designed MIC and MMIC vector modulators and mm-wave (35GHz) amplifiers. He moved to GEC Marconi Materials Technology in 1991 where he designed GaAs ICs for both the commercial product line and for customer specific applications. These included 2.4GHz and 5.2GHz transceivers, X-band core-chips, C-band phase shifters and numerous amplifier and switch ICs.

In 1996 he joined Plextek, becoming a member of the RF Integration Group, which became a separate line of business in November 2012. He has been involved in the design of over 80 custom ICs on a range of GaAs, GaN and Si processes at frequencies from baseband to 90GHz. These have included broadband amplifiers, limiters and frequency converters, PAs, phase shifters, various E-band MMICs, complete image reject receivers and transmitters and, more recently, mm-wave MMICs for 5G Front-End Modules. He has also developed microwave and mm-wave modules using a range of technologies including SMT on laminate substrates, High Density Interconnect (HDI), chip and wire, thin film, thick film and LTCC. He has published over 40 technical papers in peer reviewed journals and conferences.

Contact Liam via email: icon_mailto Liam Devlin

Robert Smith


Robert joined Plextek RFI at the start of 2016 bringing a wealth of GaN PA design experience. Since joining the company Robert has designed high performance GaN PAs and mm-wave MMICs for 5G applications. He was previously with Thales Nederland where he designed S-band sub-systems for active phased array naval radar. In addition to RF design skills, his role with Thales also provided experience of moving design from development to production and of design considerations for component reliability. Prior to joining Thales Robert completed a PhD at Cardiff University sponsored by Roke Manor Research, investigating the design and implementation of broad bandwidth, high-efficiency RF Power Amplifiers. It included the development of push-pull amplifiers at microwave frequencies, using GaN transistors and the development of load-pull measurement techniques. Robert presented details of his work at the ARMMS RF and Microwave Society Conference in April 2013, for which he received the best paper award.

Contact Robert via email: icon_mailto Robert Smith

Jake Greene

Since joining Plextek RFI in 2016, Jake has designed high power SMT GaN PAs (both discrete and MMIC) and Ka-band MMICs for 5G applications. Prior to joining Plextek RFI Jake worked for several organisations, including Freshfield Microwave Systems, Skyworks Solutions, MBDA and Peak RF Ltd, covering a variety of RF and microwave products, ranging from L-band satellite modems and X-band marine radar transceivers to SiGe and CMOS RFICs for the mobile communications industry. His experience includes the development of LNA and LNA/bypass ICs in 130 nm CMOS, as well as passive circuits such as directional couplers, equalisers, elliptic diplexers and broadband Wilkinson combiners for LTE receivers. In addition, he has undertaken a variety of EM modelling projects, using planar and 3D simulation tools to generate field plots and analyse current densities in spiral inductors and lead-frame packages.

He holds a first-class BEng (Hons) in Electronic Systems Engineering from the University of Portsmouth and an MSc in Radio Frequency and Microwave Engineering from the University of East London.

Contact Jake via email: icon_mailto Jake Greene

Stuart Glynn


Stuart began his career at Matra Marconi Space in 1997 after graduating from UMIST. Here he designed Solid State Microwave Amplifiers (including a 500W, C-band unit). In 1999 he moved to Sony where he designed ICs for 2G & 3G cellular handsets including highly integrated Si BiCMOS transceivers, PAs and switches on GaAs processes. After eight years at Sony he joined a UK start-up Nanotech Semiconductor where he designed fibre optic receivers in CMOS. In 2009 he joined Plextek, becoming a member of the RF Integration Group, which became a separate line of business in November 2012. His main work has been the design, layout, packaging and evaluation of custom GaAs and GaN MMICs at frequencies up to 40GHz. These have included broadband Ka-band receiver and transmitter ICs, broadband amplifiers, mm-wave PAs, mm-wave phase shifters, GaN HPAs and mm-wave MMICs for 5G Front-End Modules.

Contact Stuart via email: icon_mailto Stuart Glynn

Tony Richards


Tony graduated from Loughborough University of Technology in 1977 and joined Pye Telecommunications Ltd of Cambridge to develop radio communications equipment for the Private Mobile Radio market. In 1984 he joined Philips Research Labs in Eindhoven to develop RF integrated circuits for the mobile communications market. Returning to the UK in 1987, he joined Philips Radio Communications Systems and helped design Philips\’ first commercially available single chip direct conversion digital paging receiver. He then became project leader with Philips Consumer Communications, responsible for developing highly integrated digital receiver ICs.

In 1999 he joined Plextek, becoming a member of the RF Integration Group, which became a separate line of business in November 2012. He was recruited for his experience in analogue and RF IC design and has since worked on several single chip radio system developments for multinational silicon vendors such as National Semiconductors. Tony has also worked on the development of wireless meter readings systems, WLAN PC cards, Bluetooth hands-free carkits and RFID tagging. Most recently he has been developing X-band GaAs phase shift ICs, GaAs logic circuits, high power solid state microwave amplifiers, communications protocols, broadband low noise synthesisers and mobile earth station architectures for global satellite communications systems.

In 2005, he conceived and developed a course on the subject of Successful RF PCB design that he now delivers biannually at Oxford University. He is a Chartered Engineer and Fellow of the Institution of Engineering and Technology.

Contact Tony via email: icon_mailto Tony Richards
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