Dr Jonathan Lees

Dr Jonathan Lees

Lecturer - Teaching and Research

School of Engineering

Email:
leesj2@cardiff.ac.uk
Telephone:
+44 (0)29 2087 4318
Location:
E/3.11

Jonathan Lees became a chartered Engineer in 1999 and obtained MSc. and PhD. degrees from Cardiff University in 2002 and 2006 respectively. He is currently employed as a Lecturer in Non-Linear Microwave Characterisation within Cardiff University’s centre for High Frequency Engineering where his key research areas are linear-efficient PA design and characterisation with a specific interest in the design and optimisation of High-Efficiency Power Amplifiers. His work in this area culminated in the first published GaN Doherty amplifier, and his more recent activities consider the development of novel high-power, broad-band time-domain measurement and load-pull techniques that directly address the current and future needs of modern communication systems. Development of non-linear time-domain and load-pull microwave measurement systems. Current research activities include investigation into RF properties of materials, microwave heating and novel applications of microwave engineering.Electrical & Electronic Engineering
Health, Technology and the Digital World


Dr. Lees is currently the course Tutor for the MSc. in Wireless and Microwave Communications Engineering.

Contracts

TitlePeopleSponsorValueDuration
Development of power management and storage and efficient detection and wireless transmission for SHM systemsFeatherston C, Lees J, Pullin READS1998001/10/2011 - 30/09/2014
SENsors to Inform and Enable wireless NeTworksFeatherston C, Pullin R, Lees J, Holford KTSB via HW Communications14396301/01/2014 - 31/12/2016
MontaguFeatherston C, Pullin R, Lees J, Holford KTSB - Innovate UK11437801/05/2015 - 31/10/2017
Self-powered autonomous device for wireless structural health monitoring (SANDWICH)Featherston C, Pullin R, Lees J, Holford, KTSB3981601/05/2013 - 31/10/2016
RF Power Amplifiers based upon Silicon-Germanium (SiGe) BiCMOS technology (studentship)Tasker P, Lees JSiGe Semiconductor (Europe) Ltd3000001/10/2010 - 31/03/2014
Baseband linearisation schemes for high efficiency power amplifiersTasker P, Lees JInfinion Technologies North America Corp3500001/01/2015 - 31/12/2017
High performance buffers for RF GaN electronicsTasker P, Lees JEPSRC24999901/10/2016 - 31/03/2020
Multi-Mode DI - ADCBelcher R, Lees J, Naylon ASELEX Galileo10000001/10/2011 - 31/01/2013
High-efficiency device characterisation for OperaNETBenedikt J, Lees JFreescale Semiconductor5000001/10/2008 - 30/09/2011
Upgrading the small equipment base for early career researchers in the Engineering and Physical SciencesHolford K, Whatling G, Lees J, Anderson P I, Brousseau E, Cipcigan L M, Pullin R, Bigot S, Theobald P, Simpson R N, Kawashita L F, Clarke AEPSRC49832601/11/2012 - 31/03/2013
BST Capacitor characterisationLees JANALOG DEVICES350010/12/2012 - 09/01/2013
Efficient Composite Curing by Intelligent Microwave ProcessingLees J, Evans SL, Porch A, Eaton MEPSRC Centre for Innovative Manufacturing in Composites - CIMComp, via Nottingham4906901/05/2015 - 31/10/2015
To develop autonomous load cells through the development of power management electronics, wireless communication and energy harvesting technologies for a wide range of monitoring applicationsLees J, Pullin R, Featherston C, Eaton MKTP and Flintec12257001/10/2013 - 30/09/2015
Development and Realisation of Novel, Broadband, High-Efficiency Power Amplifiers (studentship)Lees J, Tasker PFreescale Semiconductor France SAS5000001/01/2012 - 31/12/2014
High Performance power amplifiers for phased array radar and point to point communication applicationsLees J, Tasker PM/A COM Technology Solutions (UK) Ltd4500001/10/2011 - 30/09/2014
Integrating High-Performance Power Amplifier with Miniturized Wideband Antenna for Highly-Efficient Future Communication DevicesLees J, Tasker P, Cripps SSer Cymru NRN AEM Swansea5935001/10/2014 - 30/09/2017
Development and realisation of novel broadband high efficiency power amplifiersTasker P, Lees JFreescale Semiconductors France SAS5000001/10/2012 - 30/09/2015
GaN electronics: RF reliability and detradation mechanismsTasker P, Lees JEPSRC22239201/01/2013 - 31/12/2015
Integration of RF Circuits with High Speed GaN Switching on Silicon SubstratesTasker P, Lees J, Benedikt JEPSRC83507401/04/2016 - 31/03/2019
Characterisation and comparison of packaged GaN devisesTasker PJ, Benedikt J, Lees J,Cree Inc1693101/05/2008 - 01/09/2008
Dynamic Characterisation and modelling of RF GaN HEMTsTasker PJ, Lees JSer Cymru NRN AEM Swansea8130001/10/2014 - 30/09/2017
Develop an ultra rapid diagnostic system capable of detecting the presence of C. difficile in a clinincal sample at the bedside in under 10 minutesBaillie L(PHRMY), Lees J, Porch ACardiff Partnership Fund1202201/09/2014 - 31/08/2015
Clean and Green Microwave heating using solid state physicsCripps, S, Porch A, Lees JNXP Semiconductors Netherlands B V3000001/10/2011 - 30/09/2014

Supervised Students

TitleStudentStatusDegree
Device level characterisation of out-phasing amplifiersBOGUSZ AleksanderCurrentPhD
Investigation of Novel Measurement Techniques for Microwave DevicesALDOUMANI AnoorCurrentPhD
Solid-State Microwave heating For Biomedical ApplicationsIMTIAZ AzeemGraduatePhD
Re-configure high efficiency power amplifiers.SHEPPHARD Daniel JohnCurrentPhD
INTEGRATING HIGH-PERFORMANCE POWER AMPLIFIERS WITH MINIATURIZED WIDEBAND ANTENNAS FOR HIGHLY-EFFICIENT FUTURE COMMUNICATION DEVICES.NAGASUNDARAM ElangoCurrentPhD
Biomedical Applications of Microwave EngineeringSHKAL Fatma AhmedCurrentPhD
NOVEL POWER AMPLIFIER DESIGN USING NON-LINEAR MICROWAVER CHARACTERISATION AND MEASUREMENT TECHNIQUESOGBOI Friday LawrenceGraduatePhD
BASEBAND LINEARISATION SCHEMES FOR HIGH EFFICIENCY POWER AMPLIFIERS.WANG GuefengCurrentPhD
Use of microwave technologies in the detection of pathogenic bacteriaHAMZAH Hayder Miri HamzahCurrentPhD
Characterisation of Powerders Using Microwave Cavity PerturbationCUENCA Jerome AlexanderGraduatePhD
Development of an efficient energy storage and power management for autonomous aircraft structural health monitoring systemTHANGARAJ KarthikThesis SubmittedPhD
Power amplifier design for microwave heating applicationsCHAUDHRY KauserCurrentPhD
MICROWAVE CHARACTERISATION OF AMMINES FOR ENERGY STORAGE APPLICATIONS.BARTER MichaelCurrentPhD
RADIATION-BASED TECHNOLOGY TO ENHANCED MICROBICIDAL ACTIVITY OF BIOCIDESPASCOE MichaelCurrentPhD
High performance power amplifiers for phased array radar and point to point communication application.KOH MinghaoThesis SubmittedPhD
High Resolution Electric Field Probes With Applications In High Efficiency RF Power Amplifier DesignDEHGHAN NeloGraduatePhD
USE OF NOVEL SENSING TECHNIQUES IN NEAR NETT SHAPE MANUFACTURING.CLARK Nicholas SebastianCurrentPhD
RF techniques applied to additive manufacturingPARKER NyleCurrentPhD
DEVICE CHARACTERISATION FOR WIDEBAND, HIGH EFFICIENCY POWER AMPLIFIERSWILSON Richard JasonCurrentPhD
MICROWAVE PROCESSING IN ADDITIVE MANUFACTURING.HEFFORD Samuel JohnCurrentPhD
ELECTROMAGNETIC PROPERTIES OF SEMICONDUCTING METAL OXIDES UNDER EXTERNAL STIMULATION.PARTRIDGE Samuel LeeCurrentPhD
Sensors to Inform & Enable Wireless NetworksGRIGG StephenCurrentPhD
DOHERTY AMPLIFIER WITH AID OF AD-HOC OPTIMIZATION FOR SDR APPLICATIONS.KAMARUDIN Syalwani BintiCurrentPhD
The Auxiliary Envelope Tracking RF Power AmplifiersYUSOFF ZubaidaGraduatePhD
DEVELOPMENT OF A BROADBAND AND EFFICIENT LINEAR TRANSMITTERA MOKHTI Zulhazmi BinCurrentPhD