IPC Subgroup
H04B 7/15 Active relay systems
Introduced: July 1974
Last revised: January 2006
Full Title
Radio transmission systems, i.e. using radiation field > Relay systems > Active relay systems
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC COMMUNICATION TECHNIQUE
- Subclass:
- TRANSMISSION
3 direct subcodes
Child Classifications
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- H04B 7/155 Ground-based stations
- H04B 7/185 Space-based or airborne stations
- H04B 7/204 Multiple access