Broadband dual-polarized antenna
View Patent ↗An antenna, including a broadband vertically polarized monopole radiating element, a reflector having a projection in a first plane generally perpendicular to a vertical axis of the monopole radiating element, a plurality of horizontally polarized radiating elements arranged generally concentrically with respect to the monopole radiating element, each one of the horizontally polarized radiating elements having a projection in a second plane generally perpendicular to the vertical axis, the second plane being offset from the first plane in a direction along the vertical axis and a feed arrangement for feeding the monopole and horizontally polarized radiating elements.
1. An antenna, comprising:
a broadband vertically polarized monopole radiating element;
a reflector having a projection in a first plane generally perpendicular to a vertical axis of said monopole radiating element;
a plurality of horizontally polarized radiating elements arranged generally concentrically with respect to said monopole radiating element, each one of said horizontally polarized radiating elements having a projection in a second plane generally perpendicular to said vertical axis, said second plane being offset from said first plane in a direction along said vertical axis; and
a feed arrangement for feeding said monopole and horizontally polarized radiating elements,
wherein said monopole radiating element comprises a conical radiating element, and wherein said conical radiating element comprises an upper conductive cylindrical element and a lower conductive conical element, said upper cylindrical and lower conical elements being held in a partially overlapping configuration by means of an inner spacer element and an outer supporting stand.
2. An antenna according to claim 1 , wherein said plurality of horizontally polarized radiating elements comprises an array of horizontally polarized radiating elements.
3. An antenna according to claim 2 , wherein said array of horizontally polarized radiating elements comprises an array of horizontally polarized dipoles.
4. An antenna according to claim 3 , wherein said array comprises four dipoles arranged in a square-like configuration.
5. An antenna according to claim 1 , wherein said plurality of horizontally polarized radiating elements is perpendicular to said vertical axis.
6. An antenna according to claim 1 , wherein said monopole radiating element radiates a vertically polarized conical omnidirectional beam.
7. An antenna according to claim 6 , wherein said plurality of horizontally polarized radiating elements radiates a horizontally polarized conical omnidirectional beam.
8. An antenna according to claim 1 , wherein said reflector comprises a ground plane.
9. An antenna according to claim 8 , wherein said reflector is planar.
10. An antenna according to claim 1 , wherein said feed arrangement comprises a first port for feeding said monopole radiating element and a second port for feeding said plurality of horizontally polarized radiating elements.
11. An antenna according to claim 10 , wherein said first port is galvanically connected to said monopole radiating element.
12. An antenna according to claim 10 , wherein said second port is connected to a common feed network feeding said plurality of horizontally polarized radiating elements.
13. An antenna according to claim 12 , wherein said feed network comprises a multi-planar feed network.
14. An antenna, comprising:
a broadband vertically polarized monopole radiating element;
a reflector having a projection in a first plane generally perpendicular to a vertical axis of said monopole radiating element;
a plurality of horizontally polarized radiating elements arranged generally concentrically with respect to said monopole radiating element, each one of said horizontally polarized radiating elements having a projection in a second plane generally perpendicular to said vertical axis, said second plane being offset from said first plane in a direction along said vertical axis;
a feed arrangement for feeding said monopole and horizontally polarized radiating elements; and
a second plurality of horizontally polarized radiating elements arranged generally concentrically with respect to said monopole radiating element, each one of said horizontally polarized radiating elements having a projection in a third plane generally perpendicular to said vertical axis, said third plane being offset from said first and said second planes in a direction along said vertical axis.
15. An antenna according to claim 14 , wherein said antenna comprises a multiband antenna.
16. An antenna according to claim 14 , wherein said second plurality of horizontally polarized radiating elements comprises an array of horizontally polarized radiating elements.
17. An antenna according to claim 16 , wherein said horizontally polarized radiating elements comprise dipoles.
18. An antenna according to claim 14 , wherein said monopole radiating element comprises a conical radiating element.
19. An antenna according to claim 14 , wherein said monopole radiating element comprises an upstanding multi-branched structure.