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PCE
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DIFF Subgroup
H01Q 3/44

varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Introduced: January 1980

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 > varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

CPC subdivides this area 3x more granularly than IPC with 2 additional codes.

2 codes are CPC-only extensions.

IPC defines codes here since 1980.

Child Classifications

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  • H01Q 3/443 CPC only CPC only
  • H01Q 3/446 CPC only CPC only
  • H01Q 3/46 Active lenses or reflecting arrays since 1980 IPC+CPC Available in IPC and CPC