WO2003005487A1 - Antenne de protection electromagnetique pour emetteur portable - Google Patents
Antenne de protection electromagnetique pour emetteur portable Download PDFInfo
- Publication number
- WO2003005487A1 WO2003005487A1 PCT/EP2002/008675 EP0208675W WO03005487A1 WO 2003005487 A1 WO2003005487 A1 WO 2003005487A1 EP 0208675 W EP0208675 W EP 0208675W WO 03005487 A1 WO03005487 A1 WO 03005487A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antenna
- central
- point
- loops
- electromagnetic protection
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—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
Definitions
- the present invention relates to an electromagnetic protection antenna for a portable transmitter, for example a mobile telephone, and more particularly such an antenna comprising two substantially planar loops symmetrical with respect to a point where they cross in an electrically isolated manner, in order to ensure a phase difference between the two loops.
- Such antennas are already known from document FR-A 2 781 088. Although generally satisfactory, it has been found that this type of antenna could be improved with a view to greater effectiveness of the protection granted to the user .
- the present invention aims to provide an antenna of the above type of greater efficiency.
- the subject of the invention is an electromagnetic protection antenna for a mobile transmitter, of the type comprising two substantially planar loops symmetrical with respect to a point where they cross in an electrically isolated manner, characterized in that a central antenna is arranged inside each of the loops, each central antenna having a shape substantially homothetic to that of the respective outer loop.
- each central antenna has dimensions substantially half that of the respective external loop.
- each central antenna forms an open loop. Also in a particular embodiment, each central antenna is electrically connected to the respective loop by a connecting section.
- each of said connecting sections can be oriented radially with respect to the point of symmetry.
- each of the central antennas may be located substantially opposite the point of contact of said central antenna with said connecting section.
- FIG. 1 is a plan view of an antenna according to a first embodiment of the invention.
- FIG. 1 is a plan view of another embodiment.
- FIG. 1 An antenna 1 composed of two circular loops 2 and 3 crossing at a point 4 with respect to which they are symmetrical. The crossing of the two loops at point 4 is carried out so that the two branches are electrically isolated.
- each loop 2 and 3 is disposed a central antenna 5 and 6 respectively.
- the central antennas ⁇ and 6 are also circular and their diameter is substantially equal to half the diameter of the loops 2 and 3.
- Each central antenna 5 and 6 is open at a point 7 and 8 respectively, which is here the point of each antenna closest to the crossing point 4. Consequently, points 4, 7 and 8 are aligned here.
- the same references have been used in FIG. 2 as in FIG. 1 for the homologous elements.
- FIG. 2 differs from that of FIG. 1 by the fact that each central antenna 5 and 6 is electrically connected to the loop inside which it is arranged, by a connecting section 9 and 10 respectively.
- the link sections 9 and 10 are here rectilinear and are aligned with the crossing point 4. Consequently, the link sections 9 and 10 are connected to the central antennas 5 and 6 at their point opposite their opening point 7 and 8 respectively.
- All of the antenna wires can be produced for example by depositing copper, in any known manner, on a flat support provided with an adhesive enabling it to be fixed on a portable electromagnetic transmitter, for example a mobile telephone, or any other type of transmitter.
Landscapes
- Support Of Aerials (AREA)
- Details Of Aerials (AREA)
- Aerials With Secondary Devices (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK02754973T DK1421648T3 (da) | 2001-07-02 | 2002-07-02 | Elektromagnetisk beskyttelsesantenne for bærbar sender |
EP02754973A EP1421648B1 (fr) | 2001-07-02 | 2002-07-02 | Antenne de protection electromagnetique pour emetteur portable |
DE60202304T DE60202304T2 (de) | 2001-07-02 | 2002-07-02 | Elektromagnetische schutzantenne für einen tragbaren funksender |
US10/482,290 US6894658B2 (en) | 2001-07-02 | 2002-07-02 | Electromagnetic protection antenna for portable transmitter |
AT02754973T ATE285128T1 (de) | 2001-07-02 | 2002-07-02 | Elektromagnetische schutzantenne für einen tragbaren funksender |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR01/08726 | 2001-07-02 | ||
FR0108726A FR2826784B1 (fr) | 2001-07-02 | 2001-07-02 | Antenne de protection electromagnetique pour emetteur portable |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003005487A1 true WO2003005487A1 (fr) | 2003-01-16 |
Family
ID=8865009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/008675 WO2003005487A1 (fr) | 2001-07-02 | 2002-07-02 | Antenne de protection electromagnetique pour emetteur portable |
Country Status (8)
Country | Link |
---|---|
US (1) | US6894658B2 (fr) |
EP (1) | EP1421648B1 (fr) |
AT (1) | ATE285128T1 (fr) |
DE (1) | DE60202304T2 (fr) |
ES (1) | ES2235070T3 (fr) |
FR (1) | FR2826784B1 (fr) |
PT (1) | PT1421648E (fr) |
WO (1) | WO2003005487A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013038099A1 (fr) | 2011-09-12 | 2013-03-21 | Abel Franco Garcia | Dispositif multi-déphaseur pour la protection des personnes contre les ondes électromagnétiques |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2860106B1 (fr) * | 2003-09-23 | 2006-03-17 | Garcia Abel Franco | Dispositif de protection des personnes vis a vis des ondes electromagnetiques |
FR2888050A1 (fr) * | 2005-06-30 | 2007-01-05 | Pierrette Wehrlen | Systeme d'antennes passives de protection biologique |
FR2890243B1 (fr) * | 2005-08-24 | 2007-11-09 | Garcia Abel Franco | Dispositif multidephaseur de protection des personnes vis a vis des ondes electromagnetiques. |
FR2923324B1 (fr) * | 2007-11-05 | 2010-09-10 | Commissariat Energie Atomique | Antenne inductive large bande pour systemes de communication sans contact |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605104A (en) * | 1969-08-19 | 1971-09-14 | Us Army | Parasitic loop counterpoise antenna |
US3971031A (en) * | 1975-10-31 | 1976-07-20 | Burke Emmett F | Loaded quad antenna |
US4516133A (en) * | 1981-09-09 | 1985-05-07 | Japan Radio Company, Limited | Antenna element having non-feed conductive loop surrounding radiating element |
FR2781088A1 (fr) * | 1998-07-08 | 2000-01-14 | Roland Wehrlen | Dispositif d'antennes passives dephasees adaptables exterieurement ou interieurement pour telephones h.f portables pour la protection electromagnetique h.f des utilisateurs |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4809009A (en) * | 1988-01-25 | 1989-02-28 | Grimes Dale M | Resonant antenna |
US5826178A (en) * | 1996-01-29 | 1998-10-20 | Seiko Communications Systems, Inc. | Loop antenna with reduced electrical field sensitivity |
GB2315602B (en) * | 1996-07-23 | 2000-11-29 | Motorola Inc | Loop antenna |
-
2001
- 2001-07-02 FR FR0108726A patent/FR2826784B1/fr not_active Expired - Fee Related
-
2002
- 2002-07-02 EP EP02754973A patent/EP1421648B1/fr not_active Expired - Lifetime
- 2002-07-02 US US10/482,290 patent/US6894658B2/en not_active Expired - Fee Related
- 2002-07-02 PT PT02754973T patent/PT1421648E/pt unknown
- 2002-07-02 WO PCT/EP2002/008675 patent/WO2003005487A1/fr not_active Application Discontinuation
- 2002-07-02 AT AT02754973T patent/ATE285128T1/de not_active IP Right Cessation
- 2002-07-02 DE DE60202304T patent/DE60202304T2/de not_active Expired - Fee Related
- 2002-07-02 ES ES02754973T patent/ES2235070T3/es not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3605104A (en) * | 1969-08-19 | 1971-09-14 | Us Army | Parasitic loop counterpoise antenna |
US3971031A (en) * | 1975-10-31 | 1976-07-20 | Burke Emmett F | Loaded quad antenna |
US4516133A (en) * | 1981-09-09 | 1985-05-07 | Japan Radio Company, Limited | Antenna element having non-feed conductive loop surrounding radiating element |
FR2781088A1 (fr) * | 1998-07-08 | 2000-01-14 | Roland Wehrlen | Dispositif d'antennes passives dephasees adaptables exterieurement ou interieurement pour telephones h.f portables pour la protection electromagnetique h.f des utilisateurs |
Non-Patent Citations (1)
Title |
---|
OJIRO Y ET AL: "A monopole-fed circularly polarized loop antenna", ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 1998. IEEE ATLANTA, GA, USA 21-26 JUNE 1998, NEW YORK, NY, USA,IEEE, US, 21 June 1998 (1998-06-21) - 26 June 1998 (1998-06-26), atlanta, usa, pages 810 - 813, XP010292376, ISBN: 0-7803-4478-2 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013038099A1 (fr) | 2011-09-12 | 2013-03-21 | Abel Franco Garcia | Dispositif multi-déphaseur pour la protection des personnes contre les ondes électromagnétiques |
Also Published As
Publication number | Publication date |
---|---|
US20040201540A1 (en) | 2004-10-14 |
EP1421648B1 (fr) | 2004-12-15 |
DE60202304D1 (de) | 2005-01-20 |
US6894658B2 (en) | 2005-05-17 |
FR2826784B1 (fr) | 2003-10-31 |
FR2826784A1 (fr) | 2003-01-03 |
ES2235070T3 (es) | 2005-07-01 |
DE60202304T2 (de) | 2006-03-02 |
PT1421648E (pt) | 2005-05-31 |
EP1421648A1 (fr) | 2004-05-26 |
ATE285128T1 (de) | 2005-01-15 |
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