RF radiation redirection away from portable communication device user

• US 8,897,843 B2
• Filed: 06/08/2012
• Issued: 11/25/2014
• Est. Priority Date: 11/06/2008
• Status: Active Grant

• Current Assignee: Penumbra Brands, Inc.
• Original Assignee: Pong Research Corporation
• Inventors: Wong, Alfred Y., Moreno, Robert, Shields, Karl Richard, Wang, Rong
• Primary Examiner(s): TRINH, TAN H
• Application Number:
  US13/492,518
• Publication Number:
  US 20120242549A1
• Time in Patent Office: 900 Days
• Field of Search: 455/757.5, 455/575.1, 455/550.1, 455/67.11, 455/90.3, 455/557, 455/552.1, 455/553.1, 455/422.1, 455/403, 455/445, 455/426.2, 455/41.2, 455/41.1, 455/575.5, 455/575.7, 455/575.8, 455/575.6, 343/702, 343/718, 343/720, 343/782
• US Class Current: 455/575.7
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 19/005 Patch antenna using one or more coplanar parasitic elements
• CPC Class Codes: H01Q 19/28 using a secondary device in the form of two or more substantially straight conductive elements log- periodic antennas H01Q11/10; constituting a reflecting surface H01Q19/10
• 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: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H04B 1/3888 Arrangements for carrying or protecting transceivers

Abstract

A case for a wireless device includes a number of RF coupling elements mounted in the case and configured such that RF radiation is coupled from an internal antenna of the wireless device out of the device to a first RF coupling element, and from the first RF coupling element to a RF redirector coupling element that redirects the RF radiation in a direction outward from said wireless device that is opposite to a user side of the wireless device. A corrugated metallic shield is optionally provided on an opposite side of the case, facing a user of the device.

Claims

1. An apparatus, comprising:

an external case configured to be coupled to a wireless device having a case separate from the external case, the external case having a plurality of antenna elements disposed within an interior of the external case,

a first antenna element from the plurality of antenna elements configured to be operatively coupled to an internal antenna of the wireless device to receive radiation from the wireless device when the external case is coupled to the wireless device and when the wireless device is operational,

a second antenna element from the plurality of antenna elements configured to redirect the radiation from the first antenna element to a third antenna element from the plurality of antenna elements when the external case is coupled to the wireless device and when the wireless device is operational,

the third antenna element configured to send the radiation from the second antenna element away from a user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational.

2. The apparatus of claim 1, wherein:

the first antenna element defines a loop structure,

the second antenna element defines a strip structure,

the third antenna element defines at least one of a U-shaped structure or a plate structure.

3. The apparatus of claim 1, wherein:

the first antenna element defines a strip structure,

the second antenna element defines a strip structure,

the third antenna element defines a plate structure.

4. The apparatus of claim 1, wherein the plurality of antenna elements are configured to redirect radiation away from the user of the wireless device such that a specific absorption rate (SAR) of the wireless device is reduced without substantially adversely affecting a total radiation power (TRP) of the wireless device.

5. The apparatus of claim 1, wherein the wireless device is disposed between the external case and the user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational.

6. An apparatus, comprising:

an external case configured to be coupled to a wireless device having a case separate from the external case, the external case having a plurality of antenna elements disposed within an interior of the external case,

a first antenna element from the plurality of antenna elements configured to be operatively coupled to an internal antenna of the wireless device to receive radiation from the wireless device when the external case is coupled to the wireless device and when the wireless device is operational,

a second antenna element from the plurality of antenna elements configured to redirect the radiation from the first antenna element when the external case is coupled to the wireless device and when the wireless device is operational,

the wireless device is elongate along a first axis,

the second antenna element defines a strip structure elongate along a second axis substantially perpendicular to the first axis.

7. The apparatus of claim 6, wherein:

the plurality of antenna elements includes a third antenna defining a strip structure elongate along a third axis substantially parallel to the first axis.

8. The apparatus of claim 6, wherein:

the plurality of antenna elements includes a third antenna defining a strip structure elongate along a third axis substantially perpendicular to the first axis.

9. The apparatus of claim 6, wherein the plurality of antenna elements are configured to redirect radiation away from the user of the wireless device such that a specific absorption rate (SAR) of the wireless device is reduced without substantially adversely affecting a total radiation power (TRP) of the wireless device.

10. The apparatus of claim 6, wherein the wireless device is disposed between the external case and the user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational.

11. An apparatus, comprising:

an external case configured to be coupled to a wireless device having a case separate from the external case, the external case having a first antenna element disposed within an interior of the external case and a second antenna element disposed within the interior of the external case, the first antenna element defining a loop structure, the second antenna element defining a loop structure,

the first antenna element and the second antenna element collectively operatively coupled to an internal antenna of the wireless device when the external case is coupled to the wireless device and the wireless device is operational, the first antenna element and the second antenna element collectively configured to redirect radiation away from a user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational.

12. The apparatus of claim 11, wherein:

the loop structure of the first antenna element being elongate along a first axis, the loop structure of the second antenna being elongate along a second axis substantially parallel to the first axis.

13. The apparatus of claim 11, wherein:

the loop structure of the first antenna element being elongate along a first axis, the loop structure of the second antenna element being elongate along a second axis substantially perpendicular to the first axis.

14. An apparatus, comprising:

an external case configured to be coupled to a wireless device having a case separate from the external case, the external case having a first antenna element disposed within an interior of the external case and a second antenna element disposed within the interior of the external case, the first antenna element defining a loop structure, the second antenna element defining a strip structure,

the first antenna element and the second antenna element collectively operatively coupled to an internal antenna of the wireless device when the external case is coupled to the wireless device and the wireless device is operational, the first antenna element and the second antenna element collectively configured to redirect radiation away from a user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational,

the loop structure of the first antenna element being elongate along a first axis, the strip structure of the second antenna element being elongate along a second axis substantially parallel to the first axis.

15. The apparatus of claim 14, wherein:

the loop structure of the first antenna element being elongate along a first axis, the strip structure of the second antenna being elongate along a second axis substantially perpendicular to the first axis.

16. The apparatus of claim 14, wherein:

the external case having a third antenna element disposed within the interior of the external case, the third antenna element defining a strip structure,

the loop structure of the first antenna element being elongate along a first axis, the strip structure of the second antenna element being elongate along a second axis substantially parallel to the first axis, the strip structure of the third antenna element being elongate along a third axis substantially parallel to the first axis and the second axis,

the first antenna element, the second antenna element and the third antenna element collectively operatively coupled to the internal antenna of the wireless device when the external case is coupled to the wireless device and the wireless device is operational,

the first antenna element, the second antenna element and the third antenna element collectively configured to redirect radiation away from the user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational.

17. The apparatus of claim 14, wherein:

the external case having a third antenna element disposed within the interior of the external case, the third antenna element defining a strip structure,

the loop structure of the first antenna element being elongate along a first axis, the strip structure of the second antenna being elongate along a second axis substantially perpendicular to the first axis, the strip structure of the third antenna element being elongate along a third axis substantially perpendicular to the first axis and substantially parallel to the second axis,

the first antenna element, the second antenna element and the third antenna element collectively operatively coupled to the internal antenna of the wireless device when the external case is coupled to the wireless device and the wireless device is operational,

the first antenna element, the second antenna element and the third antenna element collectively configured to redirect radiation away from the user of the wireless device when the external case is coupled to the wireless device and when the wireless device is operational.

18. An apparatus, comprising:

a case having a plurality of antenna elements,

a first antenna element from the plurality of antenna elements configured to be operatively coupled to an internal antenna of the wireless device to receive radiation from the wireless device when the wireless device is operational,

a second antenna element from the plurality of antenna elements configured to redirect the radiation from the first antenna element to a third antenna element from the plurality of antenna elements when the wireless device is operational,

the third antenna element configured to send the radiation from the second antenna element away from a user of the wireless device when the wireless device is operational.

19. The apparatus of claim 18, wherein:

the case is an external case configured to be coupled to the wireless device, the wireless device having a case separate from the external case, the external case having the plurality of antenna elements disposed within an interior of the external case,

the first antenna element is configured to be operatively coupled to the internal antenna when the external case is coupled to the wireless device,

the second antenna element is configured to redirect radiation from the first antenna element to the third antenna element when the external case is coupled to the wireless device,

the third antenna element configured to send the radiation from the second antenna element away from the user of the wireless device when the external case is coupled to the wireless device and.

20. The apparatus of claim 19, wherein:

the case being a case of the wireless device, the case having an outer surface and defining an interior, the internal antenna of the wireless device being disposed within the interior of the case, the plurality of antenna elements being disposed on the outer surface of the case.