Bridging the THz-gap

The transmission rate of wireless data is since 1995 increasing as one order of magnitude every 5 years. In addition, the amount of transferred data in the mobile networks has doubled every year, and is expected to increase by three orders of magnitude within 10 years. In order to maintain this development and avoid data-congestion in the mobile traffic networks, it is necessary to find new solutions for increasing the datarate. We propose a disruptive new technology enabling devices for telecom, sensors, and medical applications in the so called ’THz-gap’, highlighting the frequency range 100-1000 GHz. Currently, the major obstacle for using this frequency band is the lack of a technology capable of producing adequate output power levels. The major impact from this project is to enable this frequency window for scientific and commercial exploitation by creating a THz-technology platform for highly miniaturized systems that can be produced at low cost. Above 100 GHz, several hundred gigahertz of bandwidth is available for new communication and sensing applications. However, components for making THz-systems are today too expensive, bulky, and power hungry and not able to generate sufficient power for communication systems. The proposed project is aiming at opening the THz-window for commercial applications. This will be accomplished by developing a platform for THz-system components, including a completely new transistor technology, suitable for THz integrated circuits that can be mass-produced utilizing low-cost semiconductor processes. The integrated circuits will be heterogeneously integrated with passive components like filters, power combiners, resonant cavities, antennas etc in a silicon sandwich approach, allowing ‘Systems In Package’ (SIP) components to be realized. The objective is very challenging and requires a combined effort by leading experts from different disciplines. The main scientific challenges are: 1. Growth of high quality InGaN-based epi-layers with superior electron transport properties 2. Design and fabrication of InGanN-based transistors and MMICs (monolithic microwave integrated circuits) 3. The development of a heterogeneous integration platform for the MMICs, including MEMS-based (micro electro mechanical systems) components for frequency agility.


Herbert Zirath (contact)

Professor vid Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Tommy Ive

Forskare vid Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Anna Malmros

Forskningsingenjör vid Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Niklas Rorsman

Forskare vid Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics


Linköping University

Linköping, Sweden

Royal Institute of Technology (KTH)

Stockholm, Sweden


Knut and Alice Wallenberg Foundation

Funding Chalmers participation during 2014–2018

Related Areas of Advance and Infrastructure

Sustainable development

Driving Forces

More information

Project Web Page at Chalmers