General Applications

Atmospheric attenuation (dB/m).
Atmospheric attenuation (dB/m) as a function of the frequency (GHz).
Frequency windows
Frequency windows of minimum atmospheric attenuation and available bandwidth.

The spectrum at 300 GHz is very attractive for wireless links operating at data rates of 40-100 Gbit/s. There are three important aspects:

  • Frequency license situation and standardization: The frequency bands below 275 GHz are rather fragmented. The frequency band above 275 GHz is unregulated and standardization efforts consider continuous frequency bands of more than 40 GHz bandwidth
  • Atmospheric attenuation window: There is a wide minimum of atmospheric attenuation between 185 and 315 GHz.
  • Technology readiness: Latest short-gate III-V transistor technologies have reached maturity and can address system solutions at 300 GHz, offering low receiver noise figures and high transmit power levels, higher integration levels at a small chip size

Terapan validates the available technologies and approaches for the implementation of future beam-steering wireless data links at 300 GHz. It is a pilot study for future prototypes and R&D efforts towards commercial products.

In nomadic application scenarios, the devices are mobile but move rather slow and stay in their position for a period of time. Links can be blocked by moving obstacles, e.g. humans walking in the room. In this case an alternative communication link needs to be found by electronic beam-steering. Among the different indoor applications smart office and data centers are considered by Terapan.

Further Information

Prof. Kürner, project leader of Terapan, is chairman of the IEEE 802.15 study group. This group of members from industry and university targets a standard on 100G (100 Gbit/s over beam switchable wireless point-to-point 40/100 Gbps links). For information see:


An overview of the frequency allocation in Europe and the US is provided in:

Frequency Spectrum Allocation in Europe (ECC, Status May 2014)

Frequency Spectrum Allocation in the US (FCC, Status July 2014)


The frequency band from 275 GHz to 3000 GHz has not yet been allocated to any dedicated application which opens up new possibilities for wireless data transmission.