IPC Subgroup
H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic
Introduced: January 1980
Last revised: January 2006
Full Title
Antenna arrays or systems > Combinations of different interacting antenna units for giving a desired directional characteristic
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS