CPC Subgroup
H01Q 21/29 Combinations of different interacting antenna units for giving a desired directional characteristic (H01Q25/00 takes precedence)
Full Title
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 different interacting antenna units for giving a desired directional characteristic (H01Q25/00 takes precedence)
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