Dual slot radiator single feedpoint printed circuit board antenna
View Patent ↗A dual slot radiator is provided. The dual slot radiator comprises two slot radiating elements of different lengths having a single power feed. The power feed generally comprises a microstrip feed line connected at a first end to a power source and each of the slot radiators at a second end.
1. A multiband antenna, comprising:
a ground plane;
a first slot radiator of a first length, the first slot radiator having a first feed end and a first terminating end;
a second slot radiator of a second length, the second slot radiator having a second feed end and a second terminating end;
a single power feed directly feeding power without to the first slot radiator and the second slot radiator, the single power feed having a source end and a radiator end, the single power feed connectable to a single power source on the source end and having a first branch connected the first feed end and a second branch connected to the second feed end at the radiator end; and
at least a first ground coupled to the single power feed proximate the first slot radiator and a second ground coupled to the single power feed proximate the second slot radiator, wherein
the multiband antenna radiates at multiple frequencies.
2. The antenna of claim 1 , further comprising an end extension, the end extension connected to a terminating end selected from the group of terminating ends consisting of the first terminating end and the second terminating end.
3. The antenna of claim 1 , wherein the first slot radiator is straight.
4. The antenna of claim 1 , wherein the second slot radiator is straight.
5. The antenna of claim 4 , wherein the first slot radiator is substantially parallel to the second slot radiator.
6. The antenna of claim 5 , wherein the first slot radiator and the second slot radiator reside substantially in the same plane.
7. The antenna of claim 1 , wherein the first length is longer than the second length.
8. The antenna of claim 1 , further comprising a dielectric substrate between the ground plane, and the first slot radiator and the second slot radiator.
9. The antenna of claim 1 , wherein the single power feed comprises a microstrip feed line and the first branch and the second branch form a T.
10. The antenna of claim 1 , wherein the single power feed comprises a microstrip feed line and the first branch and the second branch form a Y.
11. The antenna of claim 2 , wherein the end extension comprises an L shape.
12. A multiband antenna, comprising:
a ground plane; the ground plane having an open termination edge and a feed edge;
a first slot radiator of a first length, the first slot radiator having a first feed end and a first terminating end; the first terminating end being substantially aligned with the open termination edge;
a second slot radiator of a second length, the second slot radiator having a second feed end and a second terminating end; the second terminating end being substantially aligned with the open termination edge; and
a single power feed, the single power feed connectable to a single power source, the single power feed having a source end being substantially aligned with the feed edge and a radiator end, the radiator end having a first branch connected the first feed end and a second branch connected to the second feed end, wherein
the multiband antenna radiates at multiple frequencies.
13. The antenna of claim 12 , wherein the first slot radiator and the second slot radiator are substantially straight.
14. The antenna of claim 12 , wherein the first length is longer than the second length.
15. The antenna of claim 12 , wherein the single power feed comprises a microstrip feed line and the first branch and the second branch for form a T joint.
16. A multiband antenna, comprising:
a ground plane; the ground plane having an open termination edge and a feed edge;
a first slot radiator of a first length, the first slot radiator having a first feed end and a first terminating end;
a second slot radiator of a second length, the second slot radiator having a second feed end and a second terminating end; and
a single power feed, the single power feed connectable to a single power source, the single power feed having a source end being substantially aligned with the feed edge and a radiator end, the radiator end having a first branch connected the first feed end and a second branch connected to the second feed end;
the first branch having a first short connected to the ground plane and the second branch having a second short connected to the ground plane, wherein
the multiband antenna radiates at multiple frequencies.
17. The antenna of claim 16 , wherein the first terminating end substantially aligns with the open termination edge.
18. The antenna of claim 17 , wherein the second terminating end substantially aligns with the open termination edge.
19. The antenna of claim 17 , where the first slot radiator radiates at a lower frequency than the second slot radiator.
20. The antenna of claim 16 , wherein the first slot radiator and the second slot radiator are substantially straight.