122, 134 and 248 GHz
The three highest frequency bands in the UK amateur license are 122, 134 and 248GHz.
- 122 GHz is a secondary allocation and suffers from high Oxygen attenuation (similar to 60GHz)
- 134 GHz is a Primary band that is the preferred operating band for new portables
- 248 GHz can earn large multipliers in IARU contests, but is difficult to obtain equipment for
At 134GHz, harmonised narrowband activity centre is now at 134.928GHz.
Note that in the UK, no operation is currently permitted on bands above 275GHz (the THz bands).
At even higher frequencies Free-space Lightwave activity is permitted as that occurs above the frequency limits in the ITU Radio regulations.