Through-hole inverted sheet metal antenna
A single piece of sheet metal antenna as well as a method and system for providing the antenna are provided. The single piece of sheet metal antenna includes a reflector/shield portion formed of a lower surface that extends in a horizontal direction and includes a through-hole, an antenna portion formed of an upper surface that extends in the horizontal direction and a vertically extending side that is joined between the upper surface and the lower surface, and a feed point formed of a through-hole flap attached and extending from the upper surface down and through the through-hole of the lower surface.
1. A single piece of sheet metal antenna comprising:
a reflector/shield portion formed of a lower surface that extends in a horizontal direction and includes a through-hole;
an antenna portion formed of an upper surface that extends in the horizontal direction and a vertically extending side that is joined between the upper surface and the lower surface; and
a feed point formed of a through-hole flap attached and extending from the upper surface down and through the through-hole of the lower surface;
wherein the lower surface and the through-hole flap are configured to attach to a printed circuit board (PCB);
wherein the reflector/shield portion further comprises:
a vertically extending edge at an end opposite the end where the vertically extending side is joined;
a first peg extending from an edge of the through-hole downward toward the PCB;
a second peg and a third peg extending from the vertically extending edge downward toward the PCB; and
wherein the vertically extending edge is formed by bending the reflector/shield portion.
2. The single piece of sheet metal antenna of claim 1 , wherein the reflector/shield portion further comprises:
a fourth peg attached to an outer edge of the reflector/shield portion and extending downward toward the PCB.
3. The single piece of sheet metal antenna of claim 1 wherein the feed point further comprises:
a horizontally extending foot portion formed at an end of the feed point that extends downward,
wherein the foot portion is formed by bending the end of the feed point.
4. The single piece of sheet metal antenna of claim 1 ,
wherein a corner of the upper surface is cut into rounded form.
5. The single piece of sheet metal antenna of claim 1 ,
wherein the sheet of metal is made from one or more selected from a group consisting of copper, copper alloy, stainless steel, phosphorous bronze, beryllium copper, and aluminum.
6. The single piece of sheet metal antenna of claim 1 ,
wherein the sheet of metal is 0.3 millimeters (mm) thick.
7. The single piece of sheet metal antenna of claim 1 ,
wherein the lower surface of the reflector/shield portion is 35 millimeters (mm) long and 8 mm wide and the through-hole of the reflector/shield portion is 23 mm long and 4 mm wide;
wherein the upper surface of the antenna portion is 28.1 mm long and 8 mm wide and the vertically extending side of the antenna portion is 5 mm tall and 8 mm wide, and
wherein the feed point is 8 mm tall and 1 mm wide.
8. The single piece of sheet metal antenna of claim 1 ,
wherein the feed point is 5 millimeters (mm) away from the vertically extending side of the antenna portion, and
wherein the through-hole of the reflector/shield portion is 3 mm from the vertically extending side of the antenna portion.
9. The single piece of sheet metal antenna of claim 1 ,
wherein the vertically extending edge of the reflector/shield portion is 2.5 millimeters (mm) tall and 8 mm wide.
10. The single piece of sheet metal antenna of claim 1 ,
wherein the first peg is 3 millimeters (mm) tall and 4 mm wide.
11. A system for wireless communication, the system comprising:
a single sheet of metal antenna comprising:
a reflector/shield portion formed of a lower surface that extends in a horizontal direction and includes a through-hole;
an antenna portion formed of an upper surface that extends in the horizontal direction and a vertically extending side that is joined between the upper surface and the lower surface; and
a feed point formed of a through-hole flap attached and extending from the upper surface down and through the through-hole of the lower surface;
a printed circuit board (PCB) upon which the lower surface and the through-hole flap of the single sheet of metal antenna are attached;
wherein the reflector/shield portion further comprises:
a vertically extending edge at an end opposite the end where the vertically extending side is joined,
a first peg extending from an edge of the through-hole downward toward the PCB;
a second peg and a third peg extending from the vertically extending edge downward toward the PCB;
wherein the vertically extending edge is formed by bending the reflector/shield portion.
12. The system of claim 11 , wherein the reflector/shield portion further comprises:
a fourth peg attached to an outer edge of the reflector/shield portion and extending downward toward the PCB.
13. The system of claim 11 , wherein the feed point further comprises:
a horizontally extending foot portion formed at an end of the feed point that extends downward,
wherein the foot portion is formed by bending the end of the feed point.
14. The system of claim 11 , wherein a corner of the upper surface is cut into rounded form.
15. The system of claim 11 ,
wherein the sheet of metal is made from one or more selected from a group consisting of copper, copper alloy, stainless steel, phosphorous bronze, beryllium copper, and aluminum.
16. The single piece of sheet metal antenna of claim 12 ,
wherein the sheet of metal is 0.3 millimeters (mm) thick,
wherein the lower surface of the reflector/shield portion is 35 millimeters (mm) long and 8 mm wide and the through-hole of the reflector/shield portion is 23 mm long and 4 mm wide;
wherein the upper surface of the antenna portion is 28.1 mm long and 8 mm wide and the vertically extending side of the antenna portion is 5 mm tall and 8 mm wide,
wherein the feed point is 8 mm tall and 1 mm wide,
wherein the feed point is 5 millimeters (mm) away from the vertically extending side of the antenna portion,
wherein the through-hole of the reflector/shield portion is 3 mm from the vertically extending side of the antenna portion,
wherein the vertically extending edge of the reflector/shield portion is 2.5 millimeters (mm) tall and 8 mm wide, and
wherein the first peg is 3 millimeters (mm) tall and 4 mm wide.
17. A method to create a single sheet of metal antenna, the method comprising:
receiving a sheet of metal;
cutting a plurality of incisions in the sheet metal;
discarding metal parts that are no longer attached to the sheet of metal; and
bending the sheet of metal along a plurality of bend points to form the antenna of claim 1 .
18. The method of claim 17 ,
wherein cutting a plurality of incision in the sheet metal includes one or more of making the incisions using stamping and making the incisions using etching.