| US 7,474,272 B2 | ||
| Parasitic element for helical antenna | ||
| Stéphane Lamoureux, Mirabel (Canada); David McLaren, Beaconsfield (Canada); Yves Gaudette, St-Lazarre (Canada); Steve Larouche, St-Lazarre (Canada); and Jean Dallaire, Laval (Canada) | ||
| Assigned to MacDonald, Dettwiler and Associates Corporation, Ste-Anne-De-Bellevue (QC) (Canada) | ||
| Filed on Jun. 27, 2007, as Appl. No. 11/819,337. | ||
| Claims priority of provisional application 60/816891, filed on Jun. 28, 2006. | ||
| Prior Publication US 2008/0012787 A1, Jan. 17, 2008 | ||
| Int. Cl. H01Q 1/36 (2006.01) | ||
| U.S. Cl. 343—895 [343/833] | 10 Claims |
| 1. A parasitic element for a helical antenna, the antenna including at least one helix conductor extending from a secured first longitudinal end of the antenna to an opposite free second longitudinal end thereof around an antenna major-axis, the parasitic element comprising an electrically conductive ring defining a ring axis and an inner and an outer wall thereof, the ring being adjacent and spaced apart from the second end in a direction leading away from the first end with the ring axis being substantially parallel to and collinear with the antenna major-axis, the ring outer wall having a diameter substantially equal to a diameter of the helix conductor at the second end. |