SAR optimized receptacle for mobile devices

• US 20040226836A1
• Filed: 05/13/2003
• Published: 11/18/2004
• Est. Priority Date: 05/13/2003
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG, Siemens Information And Communication Mobile LLC (Siemens AG)
• Inventors: Schreiber, Michael, Nevermann, Peter
• Granted Patent: US 7,327,841 B2
• Time in Patent Office: Days
• US Class Current: 206/305
• CPC Class Codes: A45C 2011/002 for portable handheld communication devices, e.g. mobile phone, pager, beeper, PDA, smart phone
• CPC Class Codes: A45F 2200/0516 Portable handheld communication devices, e.g. mobile phone, pager, beeper, PDA, smart phone
• CPC Class Codes: A45F 5/02 Fastening articles to the garment
• CPC Class Codes: H01Q 1/245 with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
• CPC Class Codes: H01Q 15/14 Reflecting surfaces; Equivalent structures electromagnetic shields H01Q1/526
• CPC Class Codes: H01Q 17/00 Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
• CPC Class Codes: H04B 1/3838 Arrangements for reducing RF exposure to the user, e.g. by changing the shape of the transceiver while in use
• CPC Class Codes: H04B 1/3888 Arrangements for carrying or protecting transceivers

Abstract

A holder for a mobile communication device comprises a receptacle for optimally reducing the SAR value of a mobile communication device secured within the receptacle. At least one material portion, a patch, causing electromagnetic losses may be placed within the receptacle to optimally reduce exposure to low level radio frequency energy to an individual carrying a mobile telephone secured within the receptacle. The patch formed of electromagnetic field reducing material may be placed in one or more particular areas of the receptacle to attenuate one or more corresponding regions of the mobile telephone in which the SAR value is substantially at a local maximum. This may allow a reduction of the SAR value of a mobile telephone while limiting the performance loss associated with the reduction of the SAR value of the mobile telephone when the mobile telephone is secured within the receptacle.

Claims

1. A holder for a mobile communication device generating a region of substantially maximum elevated electromagnetic radiation, comprising:

a receptacle for receiving and holding the mobile communication device; and

a patch held in proximity to the region of substantially maximum elevated electromagnetic radiation by the receptacle while the mobile communication device is received in the receptacle for attenuating electromagnetic radiation emitted from the region,

wherein the patch attenuates electromagnetic radiation from the mobile communication device so that the specific absorption rate (SAR) of the mobile communication device is reduced when the mobile communication device is received in the receptacle.

2. The holder as claimed in claim 1, wherein the receptacle is wearable by a user of the mobile communication device so that the mobile communication device is held adjacent to the body of the user for providing body worn use of the mobile communication device.

3. The holder as claimed in claim 2, wherein the receptacle holds the patch between the body of the user and the region of substantially maximum elevated electromagnetic radiation so that the specific absorption rate (SAR) of the mobile communication device is reduced during body worn use of the mobile communication device.

4. The holder as claimed in claim 2, wherein the holder further comprises an attachment to couple the holder to the user.

5. The holder claimed in claim 1, wherein the receptacle comprises a pouch for removably receiving the mobile communication device, the pouch substantially enclosing the mobile communication device when the mobile communication device is received in the receptacle.

6. The holder as claimed in claim 5, wherein the pouch comprises an outer surface and an inner surface, the patch being attached to the inner surface so that the patch is held within the pouch.

7. The holder as claimed in claim 5, wherein the pouch comprises an outer cover and an inner liner, the patch being held between the outer cover and the inner liner.

8. The holder as claimed in claim 1, wherein the mobile communication device comprises a keypad and display, and wherein the receptacle comprises a case for removably substantially enclosing the mobile communication device when the mobile communication device is received in the receptacle, the case providing access to at the keypad and display while the mobile communication device.

9. The holder as claimed in claim 8, wherein the case comprises an outer surface and an inner surface, the patch being attached to the inner surface so that the patch is held within the case.

10. The holder as claimed in claim 8, wherein the case comprises an outer cover and an inner liner, the patch being held between the outer cover and the inner liner.

11. The holder as claimed in claim 1, wherein the receptacle comprises a holster for removably receiving the mobile communication device.

12. The holder as claimed in claim 11, wherein the holster comprises a wall portion disposed between the mobile communication device and a body of a user of the mobile communication device, the wall portion holding the patch between the body of the user and the region of substantially maximum elevated electromagnetic radiation.

13. The holder as claimed in claim 1, wherein the patch comprises an electromagnetic field reducing material.

14. The holder as claimed in claim 13, wherein the electromagnetic field reducing material absorbs electromagnetic radiation from the region.

15. The holder as claimed in claim 13, wherein the electromagnetic field reducing material comprises a dielectric material.

16. The holder as claimed in claim 13, wherein the electromagnetic field reducing material comprises a metallic material.

18. The holder as claimed in claim 13, wherein the electromagnetic field reducing material comprises a magnetic material.

17. The holder as claimed in claim 17, wherein the mobile communication device includes an antenna and the metallic material detunes the antenna.

19. A holder for a mobile communication device generating at least a first region of substantially maximum elevated electromagnetic radiation and a second region of substantially maximum elevated electromagnetic radiation, the elevation of electromagnetic radiation of the first region being greater than the elevation of electromagnetic radiation emitted by the second region, the holder comprising:

a receptacle for receiving and holding the mobile communication device; and

a first patch held in proximity to the first region by the receptacle while the mobile communication device is received in the receptacle for attenuating electromagnetic radiation emitted from the first region;

a second patch held in proximity to the second region by the receptacle while the mobile communication device is received in the receptacle for attenuating electromagnetic radiation emitted from the second region,

wherein the first patch and the second patch attenuate electromagnetic radiation from the mobile communication device so that the specific absorption rate (SAR) of the mobile communication device is reduced when the mobile communication device is received in the receptacle.

20. The holder as claimed in claim 19, wherein the receptacle is wearable by a user of the mobile communication device so that the mobile communication device is held adjacent to the body of the user for providing body worn use of the mobile communication device.

21. The holder as claimed in claim 20, wherein the receptacle holds the first patch between the body of the user and the first region of substantially maximum elevated electromagnetic radiation and holds the second patch between the body of the user and the second region of substantially maximum elevated electromagnetic radiation so that the specific absorption rate (SAR) of the mobile communication device is reduced during body worn use of the mobile communication device.

22. The holder claimed in claim 19, wherein the receptacle comprises a pouch for removably receiving the mobile communication device, the pouch substantially enclosing the mobile communication device when the mobile communication device is received in the receptacle.

23. The holder as claimed in claim 19, wherein the mobile communication device comprises a keypad and display, and wherein the receptacle comprises a case for substantially enclosing the mobile communication device when the mobile communication device is received in the receptacle, the case providing access to at the keypad and display while the mobile communication device.

24. The holder as claimed in claim 19, wherein the receptacle comprises a holster for removably receiving the mobile communication device.

25. The holder as claimed in claim 19, wherein the first patch has a first thickness and the second patch has a second thickness, the first thickness being greater than the second thickness.

26. The holder as claimed in claim 19, wherein the first patch comprises a first electromagnetic field reducing material and the second patch comprises a second electromagnetic field reducing material.

27. The holder as claimed in claim 26, wherein the first patch comprises a first one of a dielectric material, a metallic material, and a magnetic material, and the second patch comprises a second one of a dielectric material, a metallic material, and a magnetic material.

28. The holder as claimed in claim 26, wherein the first region comprises an antenna and the first electromagnetic field reducing material comprises a metallic material for detuning the antenna, and wherein the second electromagnetic field reducing material comprises a dielectric.

29. A holder for a mobile communication device generating a region of substantially maximum elevated electromagnetic radiation, comprising:

means for receiving and removably holding the mobile communication device; and

means, held in proximity to the region of substantially maximum elevated electromagnetic radiation by the receiving and holding means, for attenuating electromagnetic radiation emitted from the region,

wherein the attenuating means attenuates electromagnetic radiation from the mobile communication device so that the specific absorption rate (SAR) of the mobile communication device is reduced while the mobile communication device is held in the receiving and holding means.

30. The holder as claimed in claim 29, wherein the receiving and holding means is wearable by a user of the mobile communication device so that the mobile communication device is held adjacent to the body of the user for providing body worn use of the mobile communication device, and the attenuating means attenuates electromagnetic radiation from the mobile communication device during body worn use of the mobile communication device.

31. The holder as claimed in claim 29, wherein the holder further comprises means for providing attachment of the holder to clothing worn by the user.

32. The holder as claimed in claim 29, wherein said mobile communication device comprises a mobile phone, a cordless phone, a pager, a wireless palmtop computer, or a personal digital assistant.