IPC Subgroup
H01Q 19/1 using reflecting surfaces
Introduced: September 1968
Last revised: January 2006
Full Title
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 > using reflecting surfaces
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ANTENNAS, i.e. RADIO AERIALS
2 direct subcodes
Child Classifications
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- H01Q 19/12 wherein the surfaces are concave
- H01Q 19/18 having two or more spaced reflecting surfaces