Flexible polymer antenna with multiple ground resonators
The disclosure concerns an antenna assembly having a substrate with an antenna radiating element and a ground conductor disposed on the substrate, the ground conductor further characterized by a plurality of ground resonators, wherein a length associated with each of the ground resonators increases as the ground resonators are distanced from the antenna radiating element. Additionally, a coaxial cable is routed around the antenna assembly for configuring the coaxial cable as an additional ground resonator associated with the antenna assembly. The resulting antenna provides wide band performance between 700 MHz and 2700 MHz with improved efficiency compared with conventional antennas.
1. An antenna, comprising:
a substrate comprising a top edge, a left edge, a bottom edge and a right edge;
a radiating element supported by the substrate, with at least a portion of the radiating element being disposed proximate the top edge and the right edge;
a ground conductor supported by the substrate, with at least a portion of the ground conductor being disposed proximate the left edge and the bottom edge, the ground conductor further comprising:
a first ground resonator having a first length;
a second ground resonator having a second length greater than the first length of the first ground resonator, the first ground resonator located between the second ground resonator and the radiating element; and
a third ground resonator having a third length greater than the first length of the first ground resonator, the second ground resonator located between the third ground resonator and the first ground resonator.
2. The antenna of claim 1 , wherein the first ground resonator further comprises:
a first segment that projects from adjacent the left edge towards the right edge of the substrate; and
a second segment that projects from an end of the first segment towards the bottom edge of the substrate.
3. The antenna of claim 2 , wherein the second ground resonator further comprises:
a third segment that projects from adjacent the left edge towards the right edge of the substrate;
a fourth segment that projects from an end of the third segment towards the top edge of the substrate; and
a fifth segment that projects from an end of the fourth segment towards the right edge of the substrate.
4. The antenna of claim 3 , wherein the third ground resonator further comprises:
a sixth segment that projects from adjacent the left edge of the substrate towards the right edge of the substrate, the sixth segment also being disposed adjacent the bottom edge of the substrate; and
a seventh segment that projects from an end of the sixth segment towards the top edge of the substrate, the seventh segment also being disposed adjacent the right edge of the substrate.
5. The antenna of claim 4 , wherein the radiating element further comprises a feed point that is disposed at a corner of the radiating element that is positioned towards the left edge of the substrate and adjacent the first ground resonator.
6. The antenna of claim 5 , wherein feed point of the radiating element marks a line of demarcation between a first radiating arm of the radiating element and a second radiating arm of the radiating element.
7. The antenna of claim 6 , wherein the first radiating arm further comprises a first radiating arm segment that projects from the feed point of the radiating element towards the right edge of the substrate.
8. The antenna of claim 7 , wherein the first radiating arm further comprises a second radiating arm segment that projects from an end of the first radiating arm segment towards the top edge of the substrate.
9. The antenna of claim 8 , wherein the first radiating arm further comprises a third radiating arm segment that projects from an end of the second radiating arm segment towards the left edge of the substrate.
10. The antenna of claim 9 , wherein the first radiating arm further comprises a fourth radiating arm segment that projects from an end of the third radiating arm segment towards the top edge of the substrate.
11. The antenna of claim 10 , wherein the first radiating arm further comprises a fifth radiating arm segment that projects from an end of the fourth radiating arm segment towards the right edge of the substrate.
12. The antenna of claim 11 , wherein the first radiating arm further comprises a sixth radiating arm segment that projects from an end of the fifth radiating arm segment towards the bottom edge of the substrate.
13. The antenna of claim 12 , wherein the first radiating arm further comprises a seventh radiating arm segment that projects from an end of the sixth radiating arm segment towards the left edge of the substrate.
14. The antenna of claim 13 , wherein the second radiating arm further comprises a first radiating arm segment that projects from the feed point of the radiating element towards the top edge of the substrate.
15. The antenna of claim 14 , wherein the second radiating arm further comprises a second radiating arm segment that projects from an end of the first radiating arm segment towards the top edge of the substrate.
16. The antenna of claim 15 , wherein the second radiating arm further comprises a third radiating arm segment that projects from an end of the second radiating arm segment towards the bottom edge of the substrate.
17. The antenna of claim 16 , wherein the second radiating arm further comprises a fourth radiating arm segment that projects from an end of the third radiating arm segment towards the left edge of the substrate.
18. The antenna of claim 17 , wherein the second radiating arm further comprises a fifth radiating arm segment that projects from an end of the fourth radiating arm segment towards the left edge of the substrate.
19. The antenna of claim 18 , wherein the fifth radiating arm segment of the first radiating arm is positioned adjacent the first radiating arm segment of the second radiating arm.
20. The antenna of claim 19 , wherein the sixth radiating arm segment of the first radiating arm is positioned adjacent the fifth radiating arm segment of the second radiating arm.