Folded UWB monopole antenna for body mounted transmitter and manufacturing method
Systems and methods improve tracking performance of an ultra-wideband (UWB) tracking tag positioned on a player on a sporting field. A UWB antenna is formed with power radiated disproportionately in forward and backward directions as compared to sideways. The UWB tracking tag is aligned with the UWB antenna when positioned on the player such that less power is absorbed by the player than radiated away from the player. The UWB antenna is monopole and may be folded from a single metal sheet forming: a flat top; a first side folded at an acute angle from one edge of the top; a second side folded at an acute angle from another edge of the top; a first solder tab folded at an obtuse angle from the first side; and a second solder tab folded at an obtuse angle from the second side, to join in parallel with the first solder tab.
1. An ultra-wideband (UWB) antenna, comprising:
a planar top with opposing first and second edges;
a first planar side joined with the planar top at the first edge and forming a first acute angle with the planar top; and
a second planar side joined with the planar top at the second edge to mirror the first planar side about the planar top, the second planar side forming a second acute angle with the planar top;
the UWB antenna having higher gain in a direction parallel to the first and second edges, relative to a direction perpendicular to the first and second edges.
2. The UWB antenna of claim 1 , the first and second edges being parallel.
3. The UWB antenna of claim 1 , the planar top being shaped as a polygon.
4. The UWB antenna of claim 1 , the planar top, the first planar side, and the second planar side being formed from a single metal sheet.
5. The UWB antenna of claim 1 , the first and second acute angles being equal.
6. The UWB antenna of claim 1 ,
the first planar side being shaped as a first triangle with a first base occurring at the first edge; and
the second planar side being shaped as a second triangle with a second base occurring at the second edge.
7. The UWB antenna of claim 6 , the first and second triangles being congruent.
8. The UWB antenna of claim 6 , the first and second angles being selected such that a vertex of the first triangle, opposite the first base, meets a vertex of the second triangle, opposite the second base, to form an apex beneath the planar top.
9. The UWB antenna of claim 8 , the apex being configured for affixing to a printed circuit board.
10. The UWB antenna of claim 8 , the apex being configured as an antenna feed.
11. The UWB antenna of claim 1 ,
the first planar side being shaped as a first trapezoid with a first base occurring at the first edge of the planar top; and
the second planar side being shaped as a second trapezoid with a second base occurring at the second edge of the planar top.
12. The UWB antenna of claim 11 , the first and second trapezoids being congruent.
13. The UWB antenna of claim 11 , further comprising:
a first solder tab joined with the first planar side at a third base, opposite the first base, of the first planar side, the first solder tab forming a first solder-tab angle with the first planar side; and
a second solder tab joined with the second planar side at a fourth base, opposite the second base, of the second planar side, the second solder tab forming a second solder-tab angle with the second planar side.
14. The UWB antenna of claim 13 , the first and second solder tabs being congruent.
15. The UWB antenna of claim 13 , the first and second solder tab-angles being equal.
16. The UWB antenna of claim 13 , the third and fourth bases being parallel.
17. The UWB antenna of claim 16 , the first and second acute angles and the first and second solder-tab angles being selected such that the third base meets the fourth base beneath the planar top.
18. The UWB antenna of claim 13 , the first and second solder-tab angles being obtuse.
19. The UWB antenna of claim 13 , the first and second solder tabs being configured for affixing to a printed circuit board.