IPC Subgroup
H01Q 3/1 to produce a conical or spiral scan
Introduced: September 1968
Last revised: January 2006
Full Title
Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system > using mechanical movement of antenna or antenna system as a whole > for varying two co-ordinates of the orientation > to produce a conical or spiral scan
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS