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Ted Johansson

Ted Johansson was born on September 20, 1959. He received the M.Sc. degree in Applied Physics and Electrical Engineering in 1985, and the Dr. Tech. and Ph.D. degrees in Electronic Devices from Linköping University, Sweden, in 1993 and 1998, respectively. In 2015, he became Docent, also at Linköping University.
From 1985 to 1989, he was with the Swedish Institute of Microwave Technology, Stockholm, conducting research in the area of MOS process technology.
He joined Ericsson Components AB, Kista, Sweden, in 1989 and worked with development of RF power transistors for cellular base stations for almost ten years. His interest then shifted into RF IC technologies, mainly SiGe bipolar and BiCMOS, and integrated power amplifiers for wireless handsets.
At Infineon Technologies Sweden AB, during 2002-2007, he divided his attention between research on SOI for BiCMOS, technology strategy for future RFIC processes, and competitor technology analysis. In 2005, the focus again became power amplifiers for wireless applications, mainly for cordless phones and WLAN.
Between 2008 and 2011, he was with Huawei Technologies Sweden AB as a full-time consultant working on R&D for cellular basestations including integrated PAs, LNAs, future radio architectures, and components technologies.
Since 2009, he is Adjunct Professor in the Integrated Circuits and Systems Group at Linköping University, Sweden. He has published more than 70 journal and conference peer-reviewed papers, one book chapter about SiGe devices, numerous texts in magazines, applications notes, and holds 40 patents.
Ted is an IEEE Senior Member, former chair and currently vice chair of IEEE Sweden Solid-State Circuits/Circuits & System Joint Chapter, and also former vice chair of IEEE Sweden Electron Device Society.
Member of European Microwave Associations (EuMA).
Member and former board member of Svenska Elektro- och Dataingenjörers Riksförening (SER).

CV, updated 2017-12
Publications and patents, updated 2017-12

Research interests:

During the years, my interests have shifted "upwards" in integration level, from Devices (including fabrication methods and process integration) via the main area Power Amplifiers (discrete and integrated, device knowledge is essential, some circuit design, quite experimental), to other building blocks for radio design such as LNAs, to Radio Architectures for flexible TRX designs. Today, CMOS Integrated Power Amplifiers is the main focus of my research work.

The research is radio communication related (cellular 2G, 3G, 4G, but also Bluetooth, WLAN, DECT), since I have been working for Ericsson, Infineon, and Huawei.

Google Scholar page


Current research:

WLAN-PA (with Catena Wireless Electronics AB, Sweden Connectivity AB):

33 miljoner till innovativ elektronik (Elektroniktidningen, 2016-06-16)

Fyra miljoner till smart effektförstärkare (LiU Nytt 2016-07-13)

Some recent presentations:

ISMOT 2015: Modified Band-Limited Pulse-Width Modulated Polar Transmitter

Docentföreläsning 2015-12-14 (in Swedish): Moores lag - vid vägs ände efter 50 år?

GHz symposium 2016: Linear CMOS-PA design in different 28 nm technologies

GHz symposium 2016: On the Design of an Antenna Switch in 28 nm FD-SOI CMOS

IECC 2017 (Keynote talk): The 28 nm CMOS Power Amplifier

Some recent publications:

Muhammad F. Ul Haque, Muhammad T. Pasha, Ted Johansson, "Aliasing-Compensated Polar PWM Transmitter", IEEE Transactions on Circuits and Systems II: Express Briefs, p. 912, Aug, 2017.

Muhammad T. Pasha, Muhammad F. Ul Haque, Jahanzeb Ahmad, Ted Johansson, "A Modified All-Digital Polar PWM Transmitter", IEEE Transactions on Circuits and Systems I: Regular Papers, p. xx, xx, 2017.

Oscar Morales Chacon, Ted Johansson, Thomas Flink, "The effect of DPD bandwidth limitation on EVM for a 28 nm WLAN 802.11ac transmitter", NORCAS 2017, Linköping, Sweden, Oct 24-25, 2017.

Muhammad Touqir Pasha, Muhammad Fahim Ul Haque, Jahanzeb Ahmad, Ted Johansson, "An All-digital PWM Transmitter with Enhanced Phase Resolution", IEEE Transactions on Circuits and Systems II: Express Briefs, p. xx, xx, 2018.

Writing in popular press:

"Lär dem löda!", SER-krönika i Elektroniktidningen 2015

"Porter och chips, Swedish SSC/CAS Chapter Conference in Historic Beer Brewery", IEEE Solid-State Magazine, Fall 2015.


Undergraduate course: TSEK02 "Radio Electronics" (HT2 2017)

Undergraduate course: TSEK03 "Radio Frequency Integrated Circuits" (HT1 2018)

Undergraduate course: TSEK38 "Radio Frequency Transceiver Design" (VT1 2018)

"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering." —Freeman Dyson (1923– )"

And finally, a classic from 1957, "A glossary for research reports"


Adjunct Professor
Dept. of Electrical Engineering
Linköpings Universitet
SE-581 83 Linköping
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Page responsible: Ted Johansson
Last updated: 2017-12-23