Interlligent UK’s 2019 RF & Microwave Design Seminar
Presentation Abstracts and Presenter Biographies
Presenter: Tudor Williams, CSA Catapult
The ever increasing demands of RF systems has led to a dramatic rise in the use of Beam Steering techniques in a range of applications from RADAR, Autonomous vehicles, Satellite Communications to 5G mobile systems. In this presentation we will identify some of the key challenges for beam steering at mmWave frequencies and cover the state of the art advances looking to provide solutions including:
- Device technology selection and the drive for compound semiconductors
- Topologies to improve power amplifier efficiency
- Novel phase shifting technologies
- Advanced packaging and integration
The presentation will conclude by reviewing the Catapults current project looking to create a demonstrators for beams-steering at mmWave frequencies, to allow the industry to evaluate this technology.
|About the presenter:
Dr Tudor Williams (Head of RF and Microwave for CSA Catapult) – Is an experienced manager and technical lead, he holds a Master of Engineering degree from Swansea University and completed his PhD in non-linear measurement system development under the supervision of Prof. Paul Tasker at Cardiff University. He has a wide range of expertise from characterization of RF devices, design of ultra wide-band MMIC’s through to full RF system design. His experience spans the full product life cycle from idea creation through to qualification and product release. He is a Reviewer for IEEE Transactions on Microwave Theory and Techniques, and IEEE Microwave and Wireless Components Letters, holds 2 granted patents and has authored over 20 international peer reviewed publications. For more information please see: CSA Catapult
Presenter: Mike Geen, Filtronic
High Altitude Pseudo-Satellites, operating in the stratosphere, together with Low Earth Orbit satellite constellations have the potential to provide solutions to the challenge of providing ubiquitous connectivity. While there is great progress in developing ever faster mobile networks to serve major centres of population, to deliver the full promise of 5G and address the digital divide it is essential to provide coverage to low population areas where terrestrial mobile networks are not viable and where many of the IoT sensors will be located.
This presentation will give an overview of the role of HAPS and satellites in forming “networks in the sky” and the describe some of the RF challenges in designing the high data rate (10Gbps-plus) communication links needed to backhaul data, both between earth and the satellite/HAPS and between satellites/HAPS.
About the presenter:
Mike Geen is Chief Scientist at Filtronic and has over40 years’ experience in microwave, millimetre-wave and optoelectronic technology. He is a member of the Filtronic senior management team with responsibility for strategic engineering, specialising in mmWave technology. Mike joined Filtronic in 2007 to head teams developing microwave and millimetre-wave point to point backhaul products. During this time, Filtronic Broadband has become established as the leading independent manufacturer of E-Band transceivers, supplying tens of thousands of E Band units to major OEMs around the world. Filtronic is currently developing high power, multichannel millimetre-wave transceivers for long range ultra-high data rate applications while continuing to evolve its E-Band products for the burgeoning 5G market.
Prior to joining Filtronic, Mike held design and management positions at Bookham (now Lumentum), GEC-Marconi and Plessey Research (Caswell). For more information please see: Filtronic
Presenter: Chris Harris, Wolfspeed
The demand for more bandwidth is driving significant growth for commercial applications at millimeter wave frequencies. Satellite communications, point-to-point communications, and the upcoming 5G rollout are all driving the need for high power, highly efficient linear circuits. In addition, phased array architectures are becoming more prevalent in these applications, and the high element count and small element spacing needed to work at Ka-Band requires excellent raw linearity, high efficiency, and reliable operation with minimal cooling. The high power density, high breakdown voltage, and excellent thermal properties of GaN-on-SiC make it of particular interest for these applications. Wolfspeed has developed a leading 150-nm, GaN-on-SiC process using an optically defined, i-line gate. This includes a fully integrated MMIC process, which supports 28V operation and provides in excess of 3 W/mm and 40% efficiency at 30 GHz under typical operating conditions.
To demonstrate the capability of the G28V5 (28V, 150 nm gate) MMIC process, Wolfspeed has designed and manufactured a 5W MMIC HPA operating from 26.5 to 30.5 GHz. This PA produces 37.6 dBm of saturated power with 39.8% associated PAE. Additionally, Wolfspeed’s G28V5 process demonstrates much improved compression characteristics compared to other available GaN processes. Where typical GaN processes are characterized by a soft compression and peak performance typically in the 4-5 dB range for a single transistor stage, the AM-to-AM characteristics of both the Wolfspeed HEMT and MMIC perform with a flatter power curve and much improved P1db. Through use of the G28V5 process and proper biasing, the above MMIC is capable of producing 37.1 dBm of power and 37.8% PAE at P1dB. This type of performance is particularly attractive to the burgeoning 5G and Sat Com markets, where the intention is to achieve good linearity without the use of pre-distortion or other off chip techniques that would add to the cost, power dissipation, and size of the system.
|About the presenter:
Dr Christopher Harris has worked with the wide band-gap semiconductor materials SiC and GaN for over 25 years and is the author of numerous scientific papers and over 40 patents in this area. During the early nineties he lead the development of high voltage SiC switches in a program at ABB in Sweden. From 1997 to 2001 he was the head of the SiC Electronics group at the Acreo Research Institute in Stockholm and expanded activities from a focus on power electronics to new areas in high temperature sensors and high frequency electronics. In 2001 he started his own company to develop SiC high frequency devices. Chris Harris joined Cree in 2006 and is currently the Director for Strategic business development for RF components. For more information please see: Wolfspeed
Presenter: Avtar Virdee, Microwave Technology Ltd
Gallium Nitride (GaN) power devices are now extensively used in the realisation of solid state power amplifiers that are employed in radar systems, electronic warfare systems, space systems, medical, communication systems and industrial heating. The presentation describes the design, implementation and measured results of GaN solid state power amplifiers operating across S-Band, C-Band, X-Band and Ku-Band with output power levels ranging from 20 W to 1 kW, and operating in pulse and continuous wave (CW) mode. The GaN devices constituting the S-Band, C-Band, X-Band and Ku-Band amplifier are based on commercial off-the-shelf packaged and bare die devices that are ITAR free.
|About the presenter:
Avtar Virdee is a Principal Consultant at Microwave Technology Limited. He received his BSc (Hons) degree in electrical and electronic engineering from the University of Leeds (UK), his MSc in microwave systems electronics from the University of Cranfield (UK), and was awarded a PhD from the London Metropolitan. He has extensive design and research experience, which includes low-noise amplifier and antenna for spacecraft at British Aerospace; solid-state amplifiers for radar, missile, and space systems at Plessey Microwave Electronics; low-noise amplifiers, high-power amplifiers, microwave components, and subsystems at Electtronica Ltd (UK) and Filtronic Components Ltd (UK); Team leader in charge of design and development of broadband frequency converters at SELEX GALILEO. Dr Virdee has authored and coauthored numerous research papers. He is a Fellow of IET, a senior member of the IEEE and a registered Chartered Engineer. For more information please see: Microwave Technology
Presenter: Liam Devlin, Plextek RFI / Mark Wong, MobiPhive
The roll-out of mmWave 5G has commenced, and with it comes the promise of step changes in data rates, low latency and a wealth of novel and integrated applications. Many of the early applications for mmWave 5G are broadband access to the home, but this will soon be augmented with the introduction of mobile handsets, devices and vehicles. Such applications will require the availability of hardware in very high volumes, and must be supported by low-cost, compact, and highly-integrated mmWave components.
MobiPhive is developing innovative mmWave front-end solutions for the end consumer electronics market using low cost, high-volume CMOS technology. This presentation will describe a complete front-end SMT packaged 28GHz IC including a 4-element Antenna-in-Package (AiP) array. Each of the 4 channels includes Tx and Rx path switching, amplification, phase control and gain control. It also includes on-chip RF combining/splitting to allow a single SMT interface at RF. The resulting component will facilitate electronic beam steering and allow the realisation of high-volume 5G user terminals. Details of the IC, including measured results, the packaging approach and the antenna array performance will be presented.
|About the presenters:
Liam Devlin is the CEO of Plextek RFI, a UK based design house specialising in the design and development of RFICs, MMICs and microwave/mm-wave modules. He has led the design and development of over 90 custom ICs on a range of GaAs, GaN and Si processes at frequencies from baseband to 90GHz. He has also developed microwave and mm-wave sub-systems using a variety of technologies including conventional SMT on laminate substrates, High Density Interconnect (HDI), chip and wire, thin film, thick film and LTCC. Liam is also a Non-Executive Director for Interlligent UK. Prior to joining Plextek he was Chief Designer with Marconi Caswell where he designed GaAs ICs for both the commercial product line and for customer specific applications. Before this, Liam was employed by Philips Research Laboratories. Liam has a BEng (Hons – Class 1) in Electrical and Electronic Engineering from the University of Leeds, and has published over 50 technical papers. For more information please see: Plextek RFI
Mark Wong is a Co-Founder and the Executive Vice President of Sales & Marketing for MobiPhive. With a BSEE and MBA from California Polytechnic State University in San Luis Obispo California, Mark has spent his entire career focused on technical sales and marketing for the wireless RF and mmWave telecommunication industries. While working for companies such as Fujitsu Media Devices (currently Taiyo Yuden), Qorvo and Q Semiconductor, he has been supporting the wireless handset manufacturers and chipset providers with RF solutions from 3G to 4G LTE. For more information please see: MobiPhive