H01Q 19/28 using a secondary device in the form of two or more substantially straight conductive elements (log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10)
Introduced: September 1968
Title
Titles differ between systems:
IPC: using a secondary device in the form of two or more substantially straight conductive elements
CPC: using a secondary device in the form of two or more substantially straight conductive elements (log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10)
Full Title
Full titles differ between systems:
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 a secondary device in the form of two or more substantially straight conductive elements
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 a secondary device in the form of two or more substantially straight conductive elements (log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10)
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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- H01Q 19/30 the primary active element being centre-fed and substantially straight, e.g. Yagi antenna IPC+CPC Available in IPC and CPC