EP3331097B1 - Antennenvorrichtung - Google Patents

Antennenvorrichtung Download PDF

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Publication number
EP3331097B1
EP3331097B1 EP17306647.3A EP17306647A EP3331097B1 EP 3331097 B1 EP3331097 B1 EP 3331097B1 EP 17306647 A EP17306647 A EP 17306647A EP 3331097 B1 EP3331097 B1 EP 3331097B1
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EP
European Patent Office
Prior art keywords
antenna
conducting
power supply
frequency range
capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17306647.3A
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English (en)
French (fr)
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EP3331097A1 (de
Inventor
Bruno Lechon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hager Security SAS
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Hager Security SAS
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Publication of EP3331097A1 publication Critical patent/EP3331097A1/de
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H01Q1/46—Electric supply lines or communication lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/06—Means for the lighting or illuminating of antennas, e.g. for purpose of warning

Definitions

  • the present invention relates to the field of antenna devices, more particularly for motion sensors.
  • Antenna devices called F-inverted type, are known from the prior art.
  • such an antenna device comprises an antenna comprising a radiating element and two branches positioned perpendicular to the radiating element and in the same plane, the branches and the radiating element delimiting an antenna volume.
  • the antenna device also comprises a ground plane, active elements, which may be LEDs, arranged in the antenna volume, and a power supply disposed in the ground plane which supplies the active elements.
  • active elements which may be LEDs
  • a power supply disposed in the ground plane which supplies the active elements.
  • it is necessary to isolate the active elements relative to the ground plane. For this purpose, it is known to achieve this isolation by means of radiofrequency shutdown inductors.
  • these inductances must be placed in the antenna volume and be as close as possible to an axis separating the antenna volume from the ground plane. It is necessary that the inductors have a higher impedance in the frequencies of the antenna than the impedance in the frequencies of the active elements. In general, the frequencies of the active elements are between 0 Hertz and a few tens of kilohertz.
  • Such antenna devices have several drawbacks which are, on the one hand, related to the quality of radiofrequency shutdown inductances and, on the other hand, to the physical dimensions of these inductances. Indeed, the impedances of radiofrequency chokes have a direct influence on the performance of the antenna, as well as on the efficiency of the active elements located in the antenna volume.
  • the document EP2302736A1 discloses an antenna having as radiating elements power supply conductors of a mobile phone vibrator.
  • the present invention aims to provide a solution to overcome at least the main limitations of the state of the art indicated above.
  • the invention relates to an antenna device according to claim 1.
  • the invention also relates to a device for transmitting and receiving electrical signals, characterized in that it comprises an antenna device as described above.
  • the antenna device 1 comprises at least one antenna 10, at least one active element 20, a power supply 30 of said active element 20 via a supply circuit 31, a ground element 40,
  • the antenna 10 delimits an antenna volume V disjoined from the volume of the mass element 40, said power supply 30 of said at least one active element 20 being disposed in the volume of the mass element 40 or on the mass element 40, said antenna 10 being adapted and intended to operate in a predetermined frequency range Fa, and, said active element 20 being adapted and adapted to operate in a frequency range of the predetermined active element Fe.
  • the capacitors 61, 62 behave like short circuits and connect the first supply-conducting element 32 and the second supply-conducting element 33 to the ground element 40. Therefore, in the frequencies of the antenna Fa, the antenna device 1 behaves like an antenna without loss of performance, as shown in FIGS. Figures 1C and 3C . On the contrary, in the frequencies of the active element, the capacitors 61, 62 behave as open circuits. As a result, in the frequencies of the active element Fe, the active element 20 is powered and controlled solely by the first supply conductor element 32 and the second supply conductive element 33, as illustrated by FIGS. Figures 1B and 3B .
  • the antenna device 1 exhibits Joule losses only generated by the first supply conductive element 32 and the second conductive supply element 33 which are negligible in comparison with that usually generated in the prior art when radiofrequency shutdown inductors are employed.
  • the first and second capacitors 61, 62 may be adapted and intended to have an impedance that tends to infinity in the frequency range of the active element Fe and the first and second capacitors 61, 62 may be suitable and intended to present an impedance that tends to zero in the frequency range of the antenna Fa.
  • the first and second capacitors 61, 62 may have a value of 180 picofarads for a frequency of the antenna Fa 430 megahertz.
  • the antenna device 1 may comprise at least one third capacitor 60 electrically connecting the first supply conductive element 32 to the first antenna conducting element 11, or to the second antenna conducting element 12, or the third antenna conductive element 13, in the frequency range of the antenna Fa and the third capacitor 60 can be adapted and intended to have an impedance that tends to infinity in the frequency range of the active element Fe and the third capacitor 60 can be adapted and intended to have an impedance that tends to zero in the frequency range of the antenna Fa.
  • the supply circuit 31 comprises only a first supply-conducting element 32 and a second supply-conducting element 33.
  • the third capacitor 60 can electrically connect the first supply conductor element 32 and the first antenna conductive element 11, in the frequency range of the antenna Fa.
  • the third capacitor 60 can electrically connect the first supply conductor element 32 and the second antenna conductive element 12 in the frequency range of the antenna Fa and the fifth capacitor 63 can electrically connect the third supply conductor 34 and the second antenna conductive element 12, in the frequency range of the antenna Fa.

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  • Details Of Aerials (AREA)

Claims (17)

  1. Antennenvorrichtung (1), mindestens eine Antenne (10) umfassend, mindestens ein aktives Bauteil (20), eine elektrische Stromversorgung (30) für das genannte aktive Bauteil (20) über einen Speisekreis (31), ein Massebauteil (40),
    wobei die genannte Antenne (10) umfasst:
    - einen ersten Antennenleiter (11), der mindestens teilweise erste elektromagnetische Wellen abstrahlende Mittel bildet,
    - einen zweiten Antennenleiter (12), direkt oder indirekt mindestens mit dem ersten Antennenleiter (11) elektrisch verbunden und dazu bestimmt, mit einer Stromversorgung der genannten Antenne (10) verbunden zu sein,
    - einen dritten Antennenleiter (13), direkt oder indirekt mindestens mit dem ersten Antennenleiter (11) und mit dem zweiten Antennenleiter (12) elektrisch verbunden,
    wobei die genannte Antenne (10) ein Antennenvolumen (V) umgrenzt, das vom Volumen des Massebauteils (40) getrennt ist, wobei die genannte Stromversorgung (30) des genannten mindestens einen aktiven Bauteils (20) im Volumen des Massebauteils (40) oder am Massebauteil (40) angeordnet ist,
    wobei die genannte Antenne (10) dafür geeignet und bestimmt ist, in einem festgelegten Frequenzbereich (Fa) zu arbeiten, und das genannte aktive Bauteil (20) dafür geeignet und bestimmt ist, in einem festgelegten Frequenzbereich des aktiven Bauteils (Fe) zu arbeiten,
    wobei der Speisekreis (31) mindestens umfasst:
    einen ersten Speiseleiter (32), der das aktive Bauteil (20) mit der Stromversorgung (30) des genannten mindestens einen aktiven Bauteils (20) im Frequenzbereich des aktiven Bauteils (Fe) elektrisch verbindet, wobei der genannte erste Leiter (32) teilweise im Antennenvolumen (V) und teilweise im Volumen des Massebauteils (40) oder am Massebauteil (40) angeordnet ist, einen zweiten Speiseleiter (33), der das aktive Bauteil (20) mit der Stromversorgung (30) des genannten mindestens einen aktiven Bauteils (20) im Frequenzbereich des aktiven Bauteils (Fe) elektrisch verbindet,
    dadurch gekennzeichnet, dass dieser zweite Speiseleiter (33) mindestens einen Teil des ersten Antennenleiters (11), den genannten dritten Antennenleiter (13) und einen Abschnitt eines Leiters (330) umfasst, der im Volumen des Massebauteils (40) oder am Massebauteil (40) angeordnet und einerseits mit dem genannten dritten Antennenleiter (13) und andererseits mit der Stromversorgung (30) des aktiven Bauteils (20) im Frequenzbereich des aktiven Bauteils (Fe) elektrisch verbunden ist,
    und dadurch, dass der Speisekreis (31) außerdem umfasst:
    mindestens einen ersten Kondensator (61), der den ersten Speiseleiter (32) mit dem Massebauteil (40) im Antennenfrequenzbereich (Fa) elektrisch verbindet, und
    mindestens einen zweiten Kondensator (62), der den zweiten Speiseleiter (33) mit dem Massebauteil (40) im Antennenfrequenzbereich (Fa) elektrisch verbindet.
  2. Antennenvorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, dass der erste und der zweite Kondensator (61, 62) dafür geeignet und bestimmt sind, über eine Impedanz zu verfügen, die im Frequenzbereich des aktiven Bauteils (Fe) gegen Unendlich strebt und dadurch, dass der erste und der zweite Kondensator (61, 62) dafür geeignet und bestimmt sind, über eine Impedanz zu verfügen, die im Antennenfrequenzbereich (Fa) gegen Null strebt.
  3. Antennenvorrichtung nach irgendeinem der Patentansprüche 1 oder 2, dadurch gekennzeichnet, dass die Antennenvorrichtung (1) mindestens einen dritten Kondensator (60) umfasst, der den ersten Speiseleiter (32) im Antennenfrequenzbereich (Fa) mit dem ersten Antennenleiter (11) oder mit dem zweiten Antennenleiter (12) oder mit dem dritten Antennenleiter (13) elektrisch verbindet, und dadurch, dass der dritte Kondensator (60) dafür geeignet und bestimmt ist, über eine Impedanz zu verfügen, die im Frequenzbereich des aktiven Bauteils (Fe) gegen Unendlich strebt und dadurch, dass der dritte Kondensator (60) dafür geeignet und bestimmt ist, über eine Impedanz zu verfügen, die im Antennenfrequenzbereich (Fa) gegen Null strebt.
  4. Antennenvorrichtung nach Patentanspruch 3, dadurch gekennzeichnet, dass der dritte Kondensator (60) den ersten Speiseleiter (32) im Antennenfrequenzbereich (Fa) mit dem ersten Antennenleiter (11) verbindet.
  5. Antennenvorrichtung nach irgendeinem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, dass der Speisekreis (31) einen dritten Speiseleiter (34) umfasst, der das aktive Bauteil (20) im Frequenzbereich des aktiven Bauteils (Fe) mit der Stromversorgung (30) elektrisch verbindet, wobei der genannte dritte Speiseleiter (34) teilweise im Antennenvolumen (V) und teilweise im Volumen des Massebauteils (40) oder am Massebauteil (40) angeordnet ist.
  6. Antennenvorrichtung nach Patentanspruch 5, dadurch gekennzeichnet, dass sie einen vierten Kondensator (64) umfasst, der den dritten Speiseleiter (34) im Antennenfrequenzbereich (Fa) mit dem Massebauteil (40) elektrisch verbindet, und dadurch, dass der vierte Kondensator (64) dafür geeignet und bestimmt ist, über eine Impedanz zu verfügen, die im Frequenzbereich des aktiven Bauteils (Fe) gegen Unendlich strebt und dadurch, dass der vierte Kondensator (64) dafür geeignet und bestimmt ist, über eine Impedanz zu verfügen, die im Antennenfrequenzbereich (Fa) gegen Null strebt.
  7. Antennenvorrichtung nach irgendeinem der Patentansprüche 5 bis 6, dadurch gekennzeichnet, dass sie einen fünften Kondensator (63) umfasst, der den dritten Speiseleiter (34) im Antennenfrequenzbereich (Fa) mit dem ersten Antennenleiter (11) oder mit dem mit dem zweiten Antennenleiter (12) oder mit dem dritten Antennenleiter (13) verbindet, und dadurch, dass der fünfte Kondensator (63) dafür geeignet und bestimmt ist, über eine Impedanz zu verfügen, die im Frequenzbereich des aktiven Bauteils (Fe) gegen Unendlich strebt und dadurch, dass der fünfte Kondensator (63) dafür geeignet und bestimmt ist, über eine Impedanz zu verfügen, die im Antennenfrequenzbereich (Fa) gegen Null strebt.
  8. Antennenvorrichtung nach irgendeinem der Patentansprüche 3 bis 7, dadurch gekennzeichnet, dass der dritte Kondensator (60) den ersten Speiseleiter (32) im Antennenfrequenzbereich (Fa) mit dem ersten Antennenleiter (11) elektrisch verbindet und dadurch, dass der fünfte Kondensator (63) den dritten Speiseleiter (34) im Antennenfrequenzbereich (Fa) mit dem ersten Antennenleiter (11) elektrisch verbindet.
  9. Antennenvorrichtung nach irgendeinem der Patentansprüche 3 bis 7, dadurch gekennzeichnet, dass der dritte Kondensator (60) den ersten Speiseleiter (32) im Antennenfrequenzbereich (Fa) mit dem zweiten Antennenleiter (12) elektrisch verbindet und dadurch, dass der fünfte Kondensator (63) den dritten Speiseleiter (34) im Antennenfrequenzbereich (Fa) mit dem zweiten Antennenleiter (12) elektrisch verbindet.
  10. Antennenvorrichtung nach irgendeinem der Patentansprüche 1 bis 9, dadurch gekennzeichnet, dass der erste Speiseleiter (32) und der zweite Speiseleiter (33) in zwei getrennten und im Wesentlichen parallel zueinander übereinander angeordneten Ebenen angeordnet sind.
  11. Antennenvorrichtung nach irgendeinem der Patentansprüche 5 bis 10, dadurch gekennzeichnet, dass der erste Speiseleiter (32), der zweite Speiseleiter (33) und der dritte Speiseleiter (34) in drei getrennten und im Wesentlichen parallel zueinander übereinander angeordneten Ebenen angeordnet sind.
  12. Antennenvorrichtung nach irgendeinem der Patentansprüche 1 bis 11, dadurch gekennzeichnet, dass das aktive Bauteil (20) mindestens eine LED (21), vorzugsweise zwei LED (21) umfasst.
  13. Antennenvorrichtung nach irgendeinem der Patentansprüche 1 bis 12, dadurch gekennzeichnet, dass die genannte Antenne (10) vom Typ Zweibandantenne ist, die über zweite elektromagnetische Wellen abstrahlende Mittel verfügt.
  14. Antennenvorrichtung nach Patentanspruch 13, dadurch gekennzeichnet, dass die Antenne (10) einen vierten Antennenleiter (14) umfasst, der mit dem zweiten Antennenleiter (12) elektrisch verbunden ist und mindestens teilweise die zweiten elektromagnetische Wellen abstrahlenden Mittel bildet.
  15. Antennenvorrichtung nach irgendeinem der Patentansprüche 1 bis 14, dadurch gekennzeichnet, dass der Antennenfrequenzbereich (Fa) zwischen 400 Megahertz und 3 Gigahertz liegt.
  16. Vorrichtung zum Aussenden und Empfangen elektrischer Signale, dadurch gekennzeichnet, dass sie eine Antennenvorrichtung (1) nach irgendeinem der Patentansprüche 1 bis 15 umfasst.
  17. Vorrichtung zum Aussenden und Empfangen elektrischer Signale nach Patentanspruch 16, dadurch gekennzeichnet, dass sie in einem Bewegungsmelder besteht.
EP17306647.3A 2016-12-05 2017-11-27 Antennenvorrichtung Active EP3331097B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1661963A FR3059839B1 (fr) 2016-12-05 2016-12-05 Dispositif d'antenne

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Publication Number Publication Date
EP3331097A1 EP3331097A1 (de) 2018-06-06
EP3331097B1 true EP3331097B1 (de) 2019-07-31

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EP (1) EP3331097B1 (de)
ES (1) ES2753963T3 (de)
FR (1) FR3059839B1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5147161B2 (ja) * 2005-03-02 2013-02-20 ソニーモバイルコミュニケーションズ株式会社 携帯無線端末およびアンテナモジュール
JP5250625B2 (ja) * 2008-06-27 2013-07-31 シャープ株式会社 無線機

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* Cited by examiner, † Cited by third party
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Also Published As

Publication number Publication date
EP3331097A1 (de) 2018-06-06
FR3059839B1 (fr) 2019-01-25
FR3059839A1 (fr) 2018-06-08
ES2753963T3 (es) 2020-04-15

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