Folded UWB monopole antenna for body mounted transmitter and manufacturing method
Systems and methods improve tracking performance of an ultra-wide-band (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. A folded ultra-wideband (UWB) monopole antenna, comprising:
a planar top having opposite first and second edges;
a first planar side joined with the planar top along a first fold line located at the first edge, the first planar side forming a first acute angle with the planar top when folded along the first fold line;
a second planar side joined with the planar top along a second fold line located at the second edge, the second planar side mirroring the first planar side about the planar top, the second planar side forming a second acute angle with the planar top when folded along the second fold line;
a first solder tab joined with the first planar side at a third fold line, the first solder tab forming a first obtuse angle with the first planar side when folded along the third fold line; and
a second solder tab joined with the second planar side at a fourth fold line, the second solder tab forming a second obtuse angle with the first solder tab with the second planar side when folded along the fourth fold line;
wherein the first and second acute angles and the first and second obtuse angles are selected such that the second solder tab meets the first solder tab.
2. The folded UWB monopole antenna of claim 1 , the first and second solder tabs having a similar shape and size.
3. The folded UWB monopole antenna of claim 2 , the first and second solder tabs being configured for soldering in the same hole of a printed circuit board.
4. The folded UWB monopole antenna of claim 1 , the planar top, the first planar side, the second planar side, the first solder tab, and the second solder tab being formed from a single metal sheet.
5. The folded UWB monopole antenna of claim 1 , the planar top being shaped as a polygon.
6. The folded UWB monopole antenna of claim 5 , the first planar side having opposite third and fourth edges located at the first fold line and the third fold line, respectively.
7. The folded UWB monopole antenna of claim 6 , the second planar side having opposite fifth and sixth edges located at the second fold line and the fourth fold line, respectively.
8. A method for manufacturing a folded ultra-wideband (UWB) monopole antenna, comprising:
cutting, from a flat metal sheet, a planar top, a first planar side joined with the planar top at a first fold line, a second planar side joined with the planar top at a second fold line, a first solder tab joined with the first planar side at a third fold line, and a second solder tab joined with the second planar side at a fourth fold line;
folding the first planar side along the first fold line to form a first acute angle between the planar top and the first planar side;
folding the second planar side along the second fold line to form a second acute angle between the planar top and the first planar side;
folding the first solder tab along the third fold line to form a first obtuse angle between the first planar side and the first solder tab; and
folding the second solder tab along the fourth fold line to form a second obtuse angle between the second planar side and the second solder tab so that the second solder tab meets the first solder tab.
9. The method of claim 8 , wherein the cutting comprises stamping.
10. The method of claim 8 , wherein the cutting precedes the folding.
11. The method of claim 10 , the planar top being shaped as a polygon.
12. The method of claim 10 , the first and second fold lines being located on opposite edges of the top portion.
13. The method of claim 12 :
the first and third fold lines being located on opposite edges of the first planar side; and
the second and fourth fold lines being located on opposite edges of the second planar side.