DIFF Subgroup
H01Q 21/30 Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Antenna arrays or systems > Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
CPC:
Antenna arrays or systems (arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system H01Q3/00) > Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
No child classifications to compare. This is a leaf node in both IPC and CPC.