IPC Main Group
H01Q 19/00 Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS
6 direct subcodes
Child Classifications
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- H01Q 19/02 Details
- H01Q 19/06 using refracting or diffracting devices, e.g. lens
- H01Q 19/1 using reflecting surfaces
- H01Q 19/2 Producing pencil beam by two cylindrical focusing devices with their focal lines orthogonally disposed
- H01Q 19/22 using a secondary device in the form of a single substantially straight conductive element
- H01Q 19/28 using a secondary device in the form of two or more substantially straight conductive elements