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

Child Classifications

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• H01Q 19/005
• H01Q 19/02 Details
• H01Q 19/06 using refracting or diffracting devices, e.g. lens
• H01Q 19/10 using reflecting surfaces
• H01Q 19/20 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 (log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10)