Antennas or antenna systems providing at least two radiating patterns (arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00)

Child Classifications

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• H01Q 25/001
• H01Q 25/002
• H01Q 25/004
• H01Q 25/005
• H01Q 25/007
• H01Q 25/02 providing sum and difference patterns (H01Q25/04 takes precedence)
• H01Q 25/04 Multimode antennas