Antenna element, feed probe; dielectric spacer, antenna and method of communicating with a plurality of devices
View Patent ↗A multiband base station antenna for communicating with a plurality of terrestrial mobile devices is described. The antenna including one or modules, each module including a low frequency ring element; and a high frequency dipole element superposed with the low frequency ring element. The element includes a ground plane; and a feed probe directed away from the ground plane and having a coupling part positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring. A dielectric clip provides a spacer between the feed probe and the ring, and also connects the ring to the ground plane. An antenna element is also described including a ring, and one or more feed probes extending from the ring, wherein the ring and feed probe(s) are formed from a unitary piece.
1. An antenna element including a ring, and one or more feed probes extending from the ring, wherein the ring and feed probe(s) are formed from a unitary piece and wherein each feed probe is formed by bending the feed probe out of the plane of the ring.
2. An antenna element according to claim 1 wherein the ring lies in a plane, and the feed probe(s) extend(s) out of the plane of the ring.
3. An antenna element according to claim 1 wherein the unitary piece is stamped from a piece of sheet metal.
4. An antenna element according to claim 1 wherein each feed probe meets the ring at a periphery of the ring.
5. An antenna element according to claim 4 wherein the periphery is an inner periphery of the ring.
6. An antenna element according to claim 1 wherein each feed probe meets the ring at a recess formed in the periphery of the ring.
7. An antenna element according to claim 1 , wherein the ring has a minimum outer diameter b, a maximum inner diameter a, and the ratio b/a is less than 1.5.
8. An antenna element according to claim 1 wherein the ring is a dual-polarized element.
9. An antenna including one or more antenna elements according to claim 1 .
10. A communication system including a network of antennas according to claim 9 .
11. A method of manufacturing an antenna element according to claim 1 , the method including forming the ring and the feed probe(s) from a unitary piece.
12. A method according to claim 11 wherein the ring lies in a plane, and each feed probe is formed by bending the feed probe out of the plane of the ring.
13. A method according to claim 11 wherein the ring and feed probe(s) are formed by stamping from a piece of sheet metal.
14. An antenna element including a ring; and a feed probe having a coupling section positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring, wherein the coupling section of the feed probe has an inner side which cannot be seen within an inner periphery of the ring when viewed in plan perpendicular to the ring.
15. An antenna element according to claim 14 wherein the feed probe includes a feed section; and a coupling section attached to the feed section, the coupling section having inner and outer opposite sides, a distal end remote from the feed section; and a coupling surface which is positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring, wherein the inner side appears convex when viewed perpendicular to the coupling surface, and wherein the outer side appears convex when viewed perpendicular to the coupling surface.
16. An antenna element according to claim 15 wherein the coupling section includes two or more arms extending from the feed section, each arm having first and second opposite sides, a distal end remote from the feed section; and a coupling surface which is positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring, wherein the inner side appears convex when viewed perpendicular to the coupling surface, and wherein the outer side appears convex when viewed perpendicular to the coupling surface.
17. An antenna element according to claim 15 wherein the feed section includes a feed leg which is disposed at an angle to the coupling surface.
18. An antenna element according to claim 15 wherein the feed section and the coupling section are formed from a unitary piece of material.
19. An antenna element according to claim 14 wherein the inner and outer sides are curved.
20. An antenna element according to claim 14 , wherein the coupling section of the feed probe extends circumferentially with respect to the ring.
21. An antenna element according to claim 14 wherein the ring has a pair of major faces joined by an inner peripheral edge and an outer peripheral edge, and wherein the feed probe is couples electromagnetically with one of the major faces of the ring.
22. An antenna element according to claim 14 wherein the coupling section of the feed probe is proximate to a first side of the ring, and wherein the element further includes a second feed probe having a coupling section proximate to a second side of the ring to enable the second feed probe to electromagnetically couple with said second side of the ring.
23. An antenna element according to claim 22 wherein the first side of the ring is opposite to the second side of the ring.
24. An antenna element according to claim 22 wherein the first side of the ring is adjacent to the second side of the ring.
25. An antenna element according to claim 14 including an air gap between the feed probe and the ring.
26. An antenna element according to claim 14 wherein the coupling section extends circumferentially around the ring.
27. An antenna element according to claim 14 further including a second ring positioned adjacent to the first ring to enable the second ring to electromagnetically couple with said first ring.
28. An antenna element according to claim 14 , wherein the ring has a minimum outer diameter b, a maximum inner diameter a, and the ratio b/a is less than 1.5.
29. An antenna including one or more antenna elements according to claim 14 .
30. A communication system including a network of antennas according to claim 29 .
31. An antenna element according to claim 14 , further comprising two or more feed probes, each feed probe having a substantially planar coupling section positioned proximate to the ring to enable the feed probe to electromagnetically couple with the ring.
32. A microstrip antenna including a ground plane; a radiating element spaced from the ground plane by an air gap; a feed probe having a coupling section positioned proximate to the radiating element to enable the feed probe to electromagnetically couple with the radiating element; and a dielectric spacer positioned between the radiating element and the feed probe and establishing at least a portion of the air gap, wherein the radiating element is a ring.
33. An antenna according to claim 32 further including a dielectric support connecting the radiating element to the ground plane.
34. An antenna according to claim 33 wherein the dielectric support is connected to the dielectric spacer.
35. An antenna according to claim 34 wherein the dielectric support and dielectric spacer are formed as a unitary piece.
36. An antenna according to claim 32 wherein the dielectric spacer passes through an aperture in the feed probe and an aperture in the radiating element.
37. An antenna according to claim 32 wherein the dielectric support passes through an aperture in the radiating element.
38. An antenna according to claim 32 including an air gap between the feed probe and the radiating element.
39. A communication system including a network of antennas according to claim 32 .
40. A dielectric spacer for use in an antenna according to claim 32 , the spacer including a spacer portion configured to maintain a minimum spacing between a feed probe and a radiating element; and a support portion configured to connect the radiating element to a ground plane, wherein the support portion and dielectric portion are formed as a unitary piece.
41. A clip according to claim 40 wherein the spacer portion includes a pair of snap-fit connectors.
42. A clip according to claim 41 wherein each snap-fit connector includes a groove and a resilient ramp adjacent to the groove.
43. A clip according to claim 40 wherein the support portion includes one or more snap-fit connectors.
44. A clip according to claim 43 wherein each snap-fit connector includes a groove and a resilient ramp adjacent to the groove.