Antenna device
An antenna device configured to be used at or in proximity to a user, the antenna device includes: an antenna structure having a conducting element, the conducting element extending over a length of between 1/16 of a wavelength and a full wavelength in a direction substantially orthogonal to a surface of the user, when the antenna device is provided in an intended operational position. A device includes: a housing having an operational position with respect to a user of the device; and an antenna structure coupled to the housing and having a conducting element, wherein the antenna structure is configured to emit an electromagnetic field so that the electromagnetic field propagates in a direction having a major directional vector that corresponds with a surface of a user using the device when the housing is at the operative position.
1. An apparatus comprising:
a housing having a surface for placement against a user of the apparatus;
a circuit in the housing; and
an antenna coupled to the circuit, the antenna having a first segment and a second segment, the first segment coupled to transmit energy between the circuit and the second segment, wherein the first segment extends along a first direction having a first major directional component that is perpendicular to the surface of the housing, and wherein the second segment extends along a second direction having a second major directional component that is parallel to the surface of the housing;
wherein the antenna is configured to emit an electromagnetic field that (1) has an electric field polarized in a direction that is at an angle with respect to a surface of the user, and (2) has at least a majority propagating in a direction along the surface of the user.
2. The apparatus according to claim 1 , further comprising a conducting element forming a ground plane and/or a reflecting plane.
3. The apparatus according to claim 1 , wherein the first segment of the antenna has a length that is at least 1/16 of a wavelength.
4. The apparatus according to claim 1 , wherein the antenna is configured to operate at a frequency that is at least 1 GHz.
5. The apparatus according to claim 1 , further comprising an antenna shortening component coupled to the antenna.
6. The apparatus according to claim 1 , further comprising a parasitic antenna element, and a conducting element connected to the parasitic antenna element.
7. The apparatus according to claim 6 , wherein the parasitic antenna element is connected to the conducting element at a first position, and wherein the antenna has an excitation point opposite from the first position.
8. The apparatus according to claim 6 , wherein a combined length of the parasitic antenna element and an effective length of the conducting element is a quarter of a wavelength.
9. The apparatus according to claim 1 , further comprising a printed circuit board on which the circuit is coupled.
10. A hearing aid system comprising:
a hearing aid; and
the apparatus according to claim 1 .
11. A hearing aid system, comprising:
a hearing aid having a hearing aid antenna; and
one or more hearing aid accessories, wherein at least one of the hearing aid accessories comprises the apparatus of claim 1 , and is configured to communicate with the hearing aid antenna.
12. The apparatus according to claim 1 , wherein the apparatus is configured to provide a remote control feature.
13. The apparatus according to claim 1 , wherein the antenna is configured to provide communication between one or more external electronic devices and a hearing aid.
14. The apparatus according to claim 1 , wherein the apparatus is a wrist watch.
15. The apparatus according to claim 1 , wherein the apparatus is a hearing aid.
16. The apparatus according to claim 1 , wherein the apparatus is configured to communicate with a hearing aid.
17. The apparatus according to claim 1 , wherein a combined length of the first and second segments of the antenna is a quarter of a wavelength or larger.
18. The apparatus according to claim 1 , further comprising an elongated member for wear around a neck of the user.
19. The apparatus according to claim 18 , wherein when the user wears the elongated member around the neck, the housing rests against a body of the user.
20. The apparatus according to claim 1 , wherein the surface is a major surface of the housing.
21. The apparatus according to claim 1 , wherein the second segment has an end that is free of electrical connection to its surrounding.
22. The apparatus according to claim 1 , wherein the apparatus is a hearing aid, and wherein at least a part of the antenna is oriented in a direction that corresponds with an ear-to-ear axis of the user.
23. The apparatus according to claim 1 , wherein the electric field is polarized in the direction such that a propagation loss in tissue of the user is less than a certain level.
24. An apparatus comprising:
a housing;
a circuit board in the housing; and
an antenna coupled to the circuit board, the antenna having a first segment and a second segment, the first segment coupled to transmit energy between the circuit board and the second segment, wherein the first segment extends along a first direction having a first major directional component that is perpendicular to a plane of the circuit board, and wherein the second segment extends along a second direction having a second major directional component that is parallel to the plane of the circuit board;
wherein the antenna is configured to emit an electromagnetic field that (1) has an electric field polarized in a direction that is at an angle with respect to a surface of the user, and (2) has at least a majority propagating in a direction along the surface of the user.
25. The apparatus according to claim 24 , further comprising a conducting element forming a ground plane and/or a reflecting plane.
26. The apparatus according to claim 24 , wherein the first segment of the antenna has a length that is at least 1/16 of a wavelength.
27. The apparatus according to claim 24 , wherein the antenna is configured to operate at a frequency that is at least 1 GHz.
28. The apparatus according to claim 24 , further comprising an antenna shortening component coupled to the antenna.
29. The apparatus according to claim 24 , further comprising a parasitic antenna element, and a conducting element connected to the parasitic antenna element.
30. The apparatus according to claim 29 , wherein the parasitic antenna element is connected to the conducting element at a first position, and wherein the antenna has an excitation point opposite from the first position.
31. The apparatus according to claim 29 , wherein a combined length of the parasitic antenna element and an effective length of the conducting element is a quarter of a wavelength.
32. A hearing aid system comprising:
a hearing aid; and
the apparatus according to claim 24 .
33. A hearing aid system, comprising:
a hearing aid having a hearing aid antenna; and
one or more hearing aid accessories, wherein at least one of the hearing aid accessories comprises the apparatus of claim 24 , and is configured to communicate with the hearing aid antenna.
34. The apparatus according to claim 24 , wherein the apparatus is configured to provide a remote control feature.
35. The apparatus according to claim 24 , wherein the antenna is configured to provide communication between one or more external electronic devices and a hearing aid.
36. The apparatus according to claim 24 , wherein the apparatus is a wrist watch.
37. The apparatus according to claim 24 , wherein the apparatus is a hearing aid.
38. The apparatus according to claim 24 , wherein the apparatus is configured to communicate with a hearing aid.
39. The apparatus according to claim 24 , wherein a combined length of the first and second segments of the antenna is a quarter of a wavelength or larger.
40. The apparatus according to claim 24 , further comprising an elongated member for wear around a neck of the user.
41. The apparatus according to claim 40 , wherein when the user wears the elongated member around the neck, the housing rests against a body of the user.
42. The apparatus according to claim 24 , wherein the housing has a major surface.
43. The apparatus according to claim 24 , wherein the second segment has an end that is free of electrical connection to its surrounding.
44. The apparatus according to claim 24 , wherein the apparatus is a hearing aid, and wherein at least a part of the antenna is oriented in a direction that corresponds with an ear-to-ear axis of the user.
45. The apparatus according to claim 24 , wherein the electric field is polarized in the direction such that a propagation loss in tissue of the user is less than a certain level.