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Publication of NL249050ApublicationCriticalpatent/NL249050A/xx
H01Q19/00—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
H01Q19/02—Details
H01Q19/04—Means for collapsing H-antennas or Yagi antennas