Antenna for a wireless hearing aid system

• US 20050099341A1
• Filed: 11/11/2004
• Published: 05/12/2005
• Est. Priority Date: 11/12/2003
• Status: Abandoned Application

• Current Assignee: Gennum Corporation
• Original Assignee: Gennum Corporation
• Inventors: Zhang, Wen Hui, Sykes, Frederick E.
• Application Number:
  US10/986,394
• Publication Number:
  US 20050099341A1
• Time in Patent Office: Days
• US Class Current: 343/700.0MS
• CPC Class Codes: H01Q 1/273 Adaptation for carrying or wearing by persons or animals
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• CPC Class Codes: H04R 2225/51 Aspects of antennas or their circuitry in or for hearing aids
• CPC Class Codes: H04R 25/554 using a wireless connection, e.g. between microphone and amplifier or using Tcoils

Abstract

A wireless communication system having a loop antenna is provided. The wireless communication system may be a wireless hearing aid having a housing structure and a communication system for receiving wireless signals. The loop antenna may be affixed to a flexible dielectric substrate, along with at least a portion of a matching network for coupling the loop antenna to the communication system.

Claims

1. A wireless hearing aid having a communication system positioned within a housing structure for receiving and processing wireless signals and for presenting those signals to a wearer of the hearing aid, the housing structure being positioned in close proximity to the human body of the wearer, the wireless hearing aid comprising:

a loop antenna configured on a flexible dielectric substrate; and

a matching network coupling the loop antenna to the communication system, wherein at least a portion of the matching network is affixed to the flexible dielectric substrate;

wherein the flexible dielectric is affixed to the housing structure of the wireless hearing aid.

2. The wireless hearing aid of claim 1, wherein the housing structure includes an inner surface and an outer surface.

3. The wireless hearing aid of claim 2, wherein the flexible dielectric substrate is affixed to the inner surface of the housing structure.

4. The wireless hearing aid of claim 2, wherein the flexible dielectric substrate is affixed to the outer surface of the housing structure.

5. The wireless hearing aid of claim 1, wherein the wireless hearing aid is a behind the ear (BTE) hearing aid, and the housing structure is positioned behind the ear of the wearer.

6. The wireless hearing aid system of claim 1, wherein the wireless hearing aid is a completely in the canal (CIC) hearing aid, an in the canal (ITC) hearing aid, or in the ear (ITE) hearing aid.

7. The wireless hearing aid system of claim 1, wherein the loop antenna is configured to operate at approximately 900 MHz.

8. The wireless hearing aid system of claim 1, wherein the loop antenna is positioned along a periphery of a portion of the housing structure so as to maximize the aperture of the loop antenna.

9. The wireless hearing aid system of claim 1, wherein the received wireless signals are used, in part, to configure the operation of the wireless hearing aid.

10. The wireless hearing aid system of claim 1, wherein the communication system includes a receiver and a transmitter, the loop antenna being utilized for both receiving wireless signals and transmitting wireless signals.

11. The wireless hearing aid system of claim 1, wherein the loop antenna includes two portions separated by a pair of gaps, wherein the portion of the matching network that is affixed to the flexible dielectric substrate is positioned within one of the pair of gaps.

12. The wireless hearing aid system of claim 1, wherein the flexible dielectric substrate is made from polyethylene, FR-4, or Duroid.

13. The wireless hearing aid system of claim 1, wherein the matching network is a narrow band matching network comprising a capacitor.

14. The wireless hearing aid system of claim 13, wherein the capacitor is affixed to the flexible dielectric substrate.

15. The wireless hearing aid system of claim 14, wherein the loop antenna includes a gap to which the capacitor is connected.

16. The wireless hearing aid system of claim 1, wherein the matching network is a medium band matching network comprising a pair of capacitors and an inductor.

17. The wireless hearing aid system of claim 16, wherein one of the pair of capacitors is connected in series with the loop antenna and the communications system and the other capacitor and the inductor are connected between the loop antenna and ground.

18. The wireless hearing aid system of claim 17, wherein the capacitor connected in series with the antenna is affixed to the flexible dielectric substrate and the other capacitor and the inductor are positioned within the housing structure.