WO1996005682B1 - Radiation shielding and range extending antenna assembly - Google Patents
Radiation shielding and range extending antenna assemblyInfo
- Publication number
- WO1996005682B1 WO1996005682B1 PCT/US1995/009717 US9509717W WO9605682B1 WO 1996005682 B1 WO1996005682 B1 WO 1996005682B1 US 9509717 W US9509717 W US 9509717W WO 9605682 B1 WO9605682 B1 WO 9605682B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- radio signal
- radiation
- antenna assembly
- user
- Prior art date
Links
- 230000005855 radiation Effects 0.000 title claims abstract 29
- 230000005540 biological transmission Effects 0.000 claims abstract 35
- 230000003071 parasitic effect Effects 0.000 claims abstract 29
- 239000006100 radiation absorber Substances 0.000 claims abstract 23
- 229910052751 metal Inorganic materials 0.000 claims 16
- 230000005670 electromagnetic radiation Effects 0.000 claims 14
- 239000010410 layer Substances 0.000 claims 9
- 239000002184 metal Substances 0.000 claims 9
- 239000002245 particle Substances 0.000 claims 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 6
- 239000004020 conductor Substances 0.000 claims 6
- 230000009977 dual effect Effects 0.000 claims 5
- 229910000859 α-Fe Inorganic materials 0.000 claims 4
- -1 Feθ2 Inorganic materials 0.000 claims 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 3
- GJPIVNTZJFSDCX-UHFFFAOYSA-N [V].[Ca] Chemical compound [V].[Ca] GJPIVNTZJFSDCX-UHFFFAOYSA-N 0.000 claims 3
- 230000000903 blocking effect Effects 0.000 claims 3
- 239000003302 ferromagnetic material Substances 0.000 claims 3
- 239000002223 garnet Substances 0.000 claims 3
- 229910052744 lithium Inorganic materials 0.000 claims 3
- 229910052749 magnesium Inorganic materials 0.000 claims 3
- 239000011777 magnesium Substances 0.000 claims 3
- 239000011159 matrix material Substances 0.000 claims 3
- 229910052759 nickel Inorganic materials 0.000 claims 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims 3
- 229910052727 yttrium Inorganic materials 0.000 claims 3
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims 3
- 239000006096 absorbing agent Substances 0.000 claims 2
- 239000011230 binding agent Substances 0.000 claims 2
- 239000004593 Epoxy Substances 0.000 claims 1
- 230000005294 ferromagnetic effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 229920001084 poly(chloroprene) Polymers 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 229920000915 polyvinyl chloride Polymers 0.000 claims 1
- 239000004800 polyvinyl chloride Substances 0.000 claims 1
- 230000001902 propagating effect Effects 0.000 claims 1
- 239000002344 surface layer Substances 0.000 claims 1
Abstract
An antenna assembly for a radio transmitting device (10) includes a radiation absorber (80) defining an open curved shape in cross section, so as to define an open transmission area. A driven antenna (40) is disposed adjacent to the open transmission area so that during use some of the radiation emitted from the antenna (40) is absorbed by the radiation absorber (80). At least one parasitic radiation redirection element (322) receives radiation emitted from the antenna (40). The parasitic radiation redirection element (322) directs a portion of the radio signal toward the open transmission area, so as to extend a transmission of the radio signal transmitting device (10).
Claims
AMENDED CLAIMS
[received by the International Bureau on 23 February 1996 (23.02.96); new claims 24-72 added; remaining claims unchanged (8 pages)]
24. An antenna assembly for use with a radio signal transmitting device, characterized by: an antenna for transmitting a radio signal from a radio signal transmitting device, the radio signal being transmitted at a transmission side of the antenna assembly and being block from transmission through a shielding side of the antenna assembly; a radiation absorber member disposed at the shielding side and disposed during use between the antenna and a user of the radio signal transmitting device; at least one of a first parasitic element disposed during use between the antenna and the user, and a second parasitic element disposed at the transmission side and disposed during use so that the antenna is between the second parasitic element and the user, at least one of the first and the second parasitic element being disposed from the antenna at a gap distance effective to direct a portion of the radio signal toward the transmission side; and a metal shell member disposed at the shielding side and disposed during use between the radiation absorber member and the user; whereby the radio signal transmitted from the antenna is blocked at the shielding side to prevent exposure of the user to the radio signal and is transmitted at the transmitting side for effective communication with a remote receiver.
25. An antenna assembly according to claim 24; further comprising a support element for supporting at least one of the radiation absorber member and the metal shell member, the support element having a thickness and a dielectric constant effective to approximate a gap distance between the metal shell member and the radiation absorber as being an air-space gap distance of one-tenth of the wavelength of the radio signal transmitted by the radio signal transmitting device.
26. An antenna assembly according to claim 24; wherein the antenna has an effective antenna length of substantially one-half of the wavelength of a radio signal transmitted by the radio signal transmitting device.
27. An antenna assembly according to claim 26; wherein at least one of the first and the second parasitic element has a length of substantially one-half of the wavelength of the radio signal transmitted by the radio signal transmitting device.
28. An antenna assembly according to claim 27; wherein at least a portion of the gap distance is an air-space, and at least one of the first and the second parasitic element is disposed from the antenna at a distance of one-tenth of the wavelength of the radio signal transmitted by the radio signal transmitting device.
5 2
29. An antenna assembly according to claim 24; wherein the antenna comprises a first antenna segment and a second antenna segment, each antenna segment having an effective antenna length of substantially one-quarter of the wavelength of a radio signal transmitted by the radio signal transmitting device so that the antenna has an effective antenna length of substantially one-half of the wavelength of the radio signal transmitted by the radio signal transmitting device.
30. An antenna assembly according to claim 24; further comprising a dielectric member disposed in the gap distance between at least one of the first and the second parasitic element and the antenna, the dielectric member being disposed in a path of a portion of the radio signal propagating between the antenna and said either of the first and the second parasitic element, the dielectric member having a dielectric constant effective to reduce the gap distance effective to direct a portion of the radio signal toward the transmission side.
31. An antenna assembly according to claim 24; wherein the radiation absorber member has a semicircular cross-section having an arc length of at least 180 degrees.
32. An antenna assembly according to claim 24; wherein the radiation absorber comprises a conductive material dispersed in a non-conductive matrix.
33. An antenna assembly according to claim 32; wherein the conductive material comprises at least one of a conductive free metal, Feθ2, titanium oxide, a ferromagnetic material, carbonyl iron, ferrite oxide, garnet, magnesium, nickel, lithium, yttrium, and calcium vanadium.
34. A dual antenna assembly for use with a radio signal transmitting device, comprising: a first and a second antenna assembly, each comprising an antenna for transmitting a radio signal from a radio signal transmitting device, the radio signal being transmitted at a transmission side of the antenna assembly and being block from transmission through a shielding side of the antenna assembly, a radiation absorber member disposed at the shielding side and disposed during use between the antenna and a user of the radio signal transmitting device, at least one of a first parasitic element disposed during use between the antenna and the user, and a second parasitic element disposed at the transmission side and disposed during use so that the antenna is between the second parasitic element and the user, at least one of the first and the second parasitic element being disposed from the antenna at a gap distance effective to direct a portion of the radio signal toward the transmission side, and a metal shell member disposed at the shielding side and disposed during use between the radiation
5 3
absorber member and the user, so that the radio signal transmitted from the antenna is blocked at the shielding side to prevent exposure of the user to the radio signal and is transmitted at the transmitting side for effective communication with a remote receiver; a first antenna lead for connecting the first antenna assembly to a transmission circuit of the radio transmitting device; and a second antenna lead for connecting the second antenna assembly to the transmission circuit of the radio transmitting device.
35. A dual antenna assembly according to claim 34, further comprising; pivoting means for pivoting the first antenna assembly relative to the second antenna assembly.
36. A dual antenna assembly according to claim 34, further comprising: signal applying means for simultaneously applying a radio signal from the transmission circuit having a first frequency to both the first and the second antenna assembly via the respective first and second antenna lead so that the antenna of the first antenna assembly and the antenna of the second antenna assembly act in combination as an antenna having an effective antenna length equal to the sum of the effective antenna length of the respective antenna of the first and the second antenna assembly, and for applying a radio signal from the transmission circuit having a second frequency to either of the first and the second antenna assembly via the respective first and second antenna lead so that either the antenna of the first antenna assembly and the antenna of the second antenna assembly acts separately as an antenna having an effective antenna length equal to the effective antenna length of the respective antenna of the first and the second antenna assembly receiving the second frequency, the second frequency being different than the first frequency.
37. A dual antenna assembly according to claim 36; wherein the second frequency is equal to twice the first frequency.
38. A dual antenna assembly according to claim 36; wherein the antenna of each of the first antenna assembly and the second antenna assembly has an effective antenna length of substantially one-half of the wavelength of a radio signal having the second frequency.
39. A hand-held radio telephone for radio communication through a remote receiver, comprising; an antenna assembly fixed to the hand-held radio telephone, the antenna assembly including a radiation absorber defining an open curved shape in cross section so as to define an open transmission area, and an antenna disposed adjacent to the open transmission area so that during use of the hand-held radio telephone a first portion of a radiation signal emitted from the antenna is adsorbed by the radiation
5 4
absorber and a second portion of the radiation signal emitted from the antenna is transmitted through the open transmission area for reception by a remote receiver; and mounting means for mounting and fixing the antenna assembly to the hand-held radio telephone so that during normal use of the hand-held radio telephone the open transmission area is disposed relative to the antenna in a direction away from the user and the radiation absorber is disposed relative to the antenna in a direction toward the user so that the second portion of the radiation signal is transmitted through the open transmission area and in a direction that is up and away from the user and towards a remote receiver and at least some of the first portion of the radiation signal is blocked from being transmitted to the user by the radiation absorber.
40. A hand-held radio telephone according to claim 39; wherein the antenna assembly further comprises a support structure fixed to the radiation absorber.
41. A hand-held radio telephone according to claim 40; wherein the support structure comprises a metal member.
42. A hand-held radio telephone according to claim 39; further comprising an antenna housing integrally formed with the hand-held radio telephone; and wherein the mounting means rotatably supports the antenna assembly within the antenna housing.
43. A hand-held radio telephone according to claim 39; wherein the radiation absorber has a semicircular cross-section having an arc length of at least 180 degrees.
44. A hand-held radio telephone according to claim 39; wherein the radiation absorber comprises a conductive material dispersed in a non-conductive matrix.
45. A hand-held radio telephone according to claim 44; wherein the conductive material comprises at least one of a conductive free metal, Feθ2, titanium oxide, a ferromagnetic material, carbonyl iron, ferrite oxide, garnet, magnesium, nickel, lithium, yttrium, and calcium vanadium.
46. A hand-held radio telephone according to claim 39; wherein the antenna assembly further includes a radiation blocking layer disposed between the antenna and the user.
47. A hand-held radio telephone according to claim 39; wherein the antenna assembly further includes at least one parasitic radiation redirection element for receiving radiation emitted from the antenna and redirecting the received radiation
55
toward the open transmission area so as to extend a transmission range of the antenna assembly.
48. A hand-held radio telephone according to claim 39; wherein the antenna assembly further includes a radiation reflection element disposed adjacent to the antenna for reflecting radiation emitted from the antenna toward the open transmission area so as to extend a transmission range of the antenna assembly.
49. A hand-held radio telephone for radio communication through an orbiting satellite, comprising; an antenna assembly fixed to the hand-held radio telephone, the antenna assembly including a radiation absorber defining an open curved shape in cross section so as to define an open transmission area, an antenna disposed adjacent to the open transmission area so that during use of the hand-held radio telephone a first portion of a radiation signal emitted from the antenna is adsorbed by the radiation absorber and a second portion of the radiation signal emitted from the antenna is transmitted through the open transmission area for reception by an orbiting satellite, and at least one parasitic radiation redirection element for receiving radiation emitted from the antenna and redirecting the received radiation toward the open transmission area so as to extend a transmission range of the antenna assembly; and mounting means for mounting and fixing the antenna assembly to the hand-held radio telephone so that during normal use of the hand-held radio telephone the open transmission area is disposed relative to the antenna in a direction away from the user and the radiation absorber is disposed relative to the antenna in a direction toward the user so that the second portion of the radiation signal is transmitted through the open transmission area and in a direction that is up and away from the user and toward an orbiting satellite and at least some of the first portion of the radiation signal is blocked from being transmitted to the user by the radiation absorber.
50. A hand-held radio telephone according to claim 49; wherein the antenna assembly further comprises a support structure fixed to the radiation absorber.
51. A hand-held radio telephone according to claim 50; wherein the support structure comprises a metal member.
52. A hand-held radio telephone according to claim 49; further comprising an antenna housing integrally formed with the hand-held radio telephone; and wherein the mounting means rotatably supports the antenna assembly within the antenna housing.
53. A hand-held radio telephone according to claim 49; wherein the radiation absorber has a semicircular cross-section having an arc length of at least 180 degrees.
54. A hand-held radio telephone according to claim 49; wherein the radiation absorber comprises a conductive material dispersed in a non-conductive matrix.
55. A hand-held radio telephone according to claim 54; wherein the conductive material comprises at least one of a conductive free metal, Feθ2, titanium oxide, a ferromagnetic material, carbonyl iron, ferrite oxide, garnet, magnesium, nickel, lithium, yttrium, and calcium vanadium.
56. A hand-held radio telephone according to claim 49; wherein the antenna assembly further includes at least one of a radiation blocking layer disposed between the antenna and the user and a reflective surface layer disposed on a surface of the radiation absorber for reflecting at least some of the first portion of the radiation signal emitted from the antenna back towards the open transmission area.
57. Shield apparatus for shielding a user from electromagnetic radiation emanating from an antenna of a radio signal transmitting device, the shield apparatus comprising: shielding means disposed during use of the radio signal transmitting device between the antenna and the user, the shielding means being effective for shielding the user from electromagnetic radiation emanating from the antenna in a direction toward the user by absorbing the electromagnetic radiation; and directing means for directing at least a portion of the electromagnetic radiation emanating from the antenna in a direction away from the user, the directing means including a first metallic element disposed adjacent to the antenna and disposed so that during use of the radio signal transmitting device the shielding means is disposed between the first metallic element and the user, a second metallic element disposed so that the antenna is disposed between the first metallic element and the second metallic element, the first metallic element and the second metallic element being effective for directing the electromagnetic radiation in the direction away from the user.
58. The shield apparatus according to claim 57; wherein the shielding means comprises particles effective for absorbing electromagnetic radiation and binding means for binding the particles.
59. The shield apparatus according to claim 58; wherein the shielding means comprises a sleeve disposed over the antenna and includes a first portion having the
57
particles and the binding means for absorbing the electromagnetic radiation and a second portion through which the electromagnetic radiation is transmitted.
60. A radio signal transmitting device, comprising: a handset; an antenna for transmitting electromagnetic radiation from the handset; shielding means disposed during use between the antenna and a user of the radio signal transmitting device, the shielding means for absorbing electromagnetic radiation emanating from the antenna in a first direction toward the user, the shielding means comprising particles for absorbing the electromagnetic radiation and binding means for receiving and binding the particles; and directing means comprising a first parasitic element disposed adjacent to the antenna and a second parasitic element disposed remote from the first parasitic element and aligned with the first parasitic element and the antenna for directing the electromagnetic radiation in a second direction away from the user.
61. The radio signal transmitting device according to claim 60; wherein the shielding means comprises a sleeve disposed about the antenna, the sleeve includes a first portion having the particles and the binding means and being effective for absorbing the electromagnetic radiation and a second portion through which the electromagnetic radiation is broadcast.
62. The radio signal transmitting device according to claim 60; wherein the antenna is movable from a down position within the handset to an up position above the handset; and the shielding means is movable with the antenna.
63. The radio signal transmitting device according to claim 60; wherein the shielding means comprises an arcuately extending shield member secured to the handset adjacent to the antenna.
64. The radio signal transmitting device according to claim 63; wherein the first parasitic element is disposed against the arcuately extending shield member.
65. The radio signal transmitting device according to claim 60; wherein the antenna is disposed between the first and second parasitic elements.
58
66. The radio signal transmitting device according to claim 60; wherein the shielding means includes a first layer of ferromagnetic or non-microwave ferrite material.
67. The radio signal transmitting device according to claim 66; wherein the shielding means further includes a metallic layer secured to the first layer.
68. An antenna assembly for use with a radio signal transmitting device, comprising: an antenna for transmitting a radio signal from a radio signal transmitting device; shielding means comprising a radiation absorbing layer, the shielding means being disposed during use of the radio signal transmitting device between the antenna and a user; and directing means comprising a first parasitic element disposed during use between the antenna and the user, and a second parasitic element disposed during use so that the antenna is between the second parasitic element and the user, the first parasitic element and the second parasitic element being effective to direct a portion of the radio signal transmitted from the antenna in a direction away from the user so as to extend the transmission range of the radio signal transmitting device.
69. An antenna assembly according to claim 68; wherein the at least one parasitic element comprises an electrically grounded parasitic element electrically connected to a circuit ground of the radio signal transmitting device.
70. An antenna assembly according to claim 68; wherein the radiation absorbing layer includes particles effective for blocking the radio signal transmitted from the antenna in a direction toward the user, and a binder for binding the particles.
71. An antenna assembly according to claim 70; wherein the binder comprising at least one of silicone, epoxy, neoprene and polyvinyl chloride.
72. An antenna assembly according to claim 68; wherein the shielding means further comprises a metallic shielding layer disposed during use between the radiation absorbing layer and the user.
5 9
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU33600/95A AU3360095A (en) | 1994-08-01 | 1995-08-01 | Radiation shielding and range extending antenna assembly |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/283,526 US5507012A (en) | 1993-03-17 | 1994-08-01 | Shield apparatus for absorbing microwave energy for hand held telephones |
| US283,526 | 1994-08-01 | ||
| US40443595A | 1995-03-15 | 1995-03-15 | |
| US08/404,436 US5601109A (en) | 1995-03-15 | 1995-03-15 | Fluid flow monitor |
| US404,435 | 1995-03-15 | ||
| US480,905 | 1995-06-08 | ||
| US08/480,905 US5666125A (en) | 1993-03-17 | 1995-06-08 | Radiation shielding and range extending antenna assembly |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| WO1996005682A2 WO1996005682A2 (en) | 1996-02-22 |
| WO1996005682A3 WO1996005682A3 (en) | 1996-06-27 |
| WO1996005682B1 true WO1996005682B1 (en) | 1996-09-06 |
| WO1996005682A9 WO1996005682A9 (en) | 1996-10-10 |
Family
ID=27501358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1995/009717 WO1996005682A2 (en) | 1994-08-01 | 1995-08-01 | Radiation shielding and range extending antenna assembly |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1996005682A2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9600824L (en) * | 1996-03-04 | 1997-09-05 | Moteco Ab | Power reduction device |
| US20030040345A1 (en) * | 1996-04-29 | 2003-02-27 | H. Stephen Berger | Radio-frequency hearing aid protector for wireless communications products |
| US5966099A (en) * | 1997-02-28 | 1999-10-12 | Ericsson Inc. | Adaptable directional antenna for hand-held terminal application |
| DE19727967A1 (en) * | 1997-07-02 | 1999-01-14 | Helmut Podobnik | Protection against electrosmog |
| RU2140689C1 (en) * | 1999-02-19 | 1999-10-27 | Общество с ограниченной ответственностью "Специальные комплексные проекты" | Radiophone incorporating electromagnetic radiation protection for user |
| SE9901680L (en) * | 1999-05-06 | 2000-11-07 | Stjernvall Christian Richtner | Mobile phone and antenna for such |
| ES2170663B1 (en) * | 2000-05-19 | 2003-12-16 | Hueto Leon Francisco M | RADIATION PROTECTION SCREEN, POLARIZED, FOR MOBILE PHONE. |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012114A (en) * | 1989-06-28 | 1991-04-30 | Charles H. Yanke | Radiation shield |
| JP2825670B2 (en) * | 1990-12-14 | 1998-11-18 | 富士通株式会社 | High frequency circuit device shield structure |
| US5335366A (en) * | 1993-02-01 | 1994-08-02 | Daniels John J | Radiation shielding apparatus for a radio transmitting device |
-
1995
- 1995-08-01 WO PCT/US1995/009717 patent/WO1996005682A2/en active Application Filing
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