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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