Hearing aid with an antenna
A hearing aid includes: a signal processor; a wireless communications unit, the wireless communications unit being connected to the signal processor; and an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point; wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point; and wherein the antenna has a first resonant frequency and a second resonant frequency.
1. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end;
wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria: d2>d1, and 0<|(d1−d2)/d2|<0.25; and
wherein the first antenna end has a zero current during an operation of the antenna.
2. The hearing aid according to claim 1 , wherein the first length is at least λ/4 and/or wherein the second length is at least λ/4.
3. The hearing aid according to claim 1 , wherein the first branch forms a loop and/or the second branch forms a loop.
4. The hearing aid according to claim 1 , wherein the antenna is a part of an assembly, and wherein the first portion and the second portion of the second branch forms at least a part of the second branch that extends from a first side of the assembly to a second side of the assembly.
5. The hearing aid according to claim 1 , wherein the antenna is a part of an assembly, and wherein the at least a part of the first branch extends along a first side of the assembly.
6. The hearing aid according to claim 1 , wherein the antenna is a part of an assembly, wherein the hearing aid is a behind-the-ear hearing aid configured to be positioned behind an ear of a user during use, and wherein the hearing aid has a first longitudinal side that corresponds with the first side of the assembly and a second longitudinal side that corresponds with the second side of the assembly.
7. The hearing aid according to claim 5 , wherein the first portion of the second branch extends along a second side of the assembly that is opposite from the first side of the assembly.
8. The hearing aid according to claim 7 , wherein the second portion of the second branch extends along a third side of the assembly that forms an angle with respect to the first side of the assembly.
9. The hearing aid according to claim 1 , wherein the second direction of the first portion of the second branch is parallel to the first direction of the at least a part of the first branch.
10. The hearing aid according to claim 1 , wherein the at least a part of the first branch and the first portion of the second branch are out of alignment with respect to each other.
11. The hearing aid according to claim 1 , wherein the first branch and the second branch are configured to provide a bandwidth for the antenna that is greater than a bandwidth attributable to either the first branch or the second branch.
12. The hearing aid according to claim 1 , wherein |(d1−d2)/d2|<0.1.
13. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end;
wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria: d2>d1, and 0<|(d1−d2)/d2|<0.25; and
wherein the second antenna end has a zero current during an operation of the antenna.
14. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end;
wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria: d2>d1, and 0<|(d1−d2)/d2|<0.25; and
wherein the first antenna end has infinite impedance.
15. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end;
wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria: d2>d1, and 0<|(d1−d2)/d2|<0.25; and
wherein the second antenna end has infinite impedance.
16. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end;
wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria: d2>d1, and 0<|(d1−d2)/d2|<0.25; and
wherein the first antenna end is electrically isolated.
17. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end;
wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria: d2>d1, and 0<|(d1−d2)/d2|<0.25; and
wherein the second antenna end is electrically isolated.
18. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end; and
wherein the first antenna end has a zero current during an operation of the antenna.
19. The hearing aid according to claim 18 , wherein the first branch has a first length d1 measured along a profile of the first branch from the excitation point to the first antenna end;
wherein the second branch has a second length d2 measured along a profile of the second branch from the excitation point to the second antenna end; and
wherein d1 and d2 satisfy the below criteria:
d2>d1, and
0<|( d 1− d 2)/ d 2|<0.25.
20. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end; and
wherein the first antenna end has infinite impedance.
21. A hearing aid comprising:
a signal processor;
a wireless communications unit, the wireless communications unit being connected to the signal processor; and
an antenna for electromagnetic field emission and electromagnetic field reception, the antenna being connected to the wireless communications unit, the antenna having an excitation point;
wherein a first branch of the antenna extends from the excitation point and a second branch of the antenna extends from the excitation point;
wherein at least a part of the first branch extends in a first direction that corresponds with a longitudinal axis of the hearing aid;
wherein the second branch has a first portion extending in a second direction that corresponds with the longitudinal axis of the hearing aid, and a second portion forming an angle relative to the longitudinal axis of the hearing aid;
wherein the first branch of the antenna has a first antenna end, and the second branch of the antenna has a second antenna end; and
wherein the first antenna end is electrically isolated.