EP1922783B1 - Kompakte mehrbandantenne - Google Patents

Kompakte mehrbandantenne Download PDF

Info

Publication number
EP1922783B1
EP1922783B1 EP06808268A EP06808268A EP1922783B1 EP 1922783 B1 EP1922783 B1 EP 1922783B1 EP 06808268 A EP06808268 A EP 06808268A EP 06808268 A EP06808268 A EP 06808268A EP 1922783 B1 EP1922783 B1 EP 1922783B1
Authority
EP
European Patent Office
Prior art keywords
antenna
arm
band
antenna according
mhz
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
EP06808268A
Other languages
English (en)
French (fr)
Other versions
EP1922783A1 (de
Inventor
Jean-François PINTOS
Philippe Minard
Ali Louzir
Philippe Gilberton
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.)
THOMSON LICENSING
Original Assignee
Thomson Licensing SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR0552987A external-priority patent/FR2891666A1/fr
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of EP1922783A1 publication Critical patent/EP1922783A1/de
Application granted granted Critical
Publication of EP1922783B1 publication Critical patent/EP1922783B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • 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

Definitions

  • the present invention relates to a compact multiband antenna, more particularly to a compact antenna that can be connected to a digital terrestrial television (DTT) receiver in DVB-H format (for Digital Video Broadcast Handheld in English), the receiver being able to be a portable device such as a PDA (for Personal Digital Assistant).
  • DTT digital terrestrial television
  • PDA Personal Digital Assistant
  • DVB-H format is possible because of the computing power of the microprocessor that equips most of these devices.
  • the DVB-H standard uses a new digital compression standard for video called H264 and recommends placing this new image format for mobile applications either in the UHF band (band between 470 and 870 MHz) or in the L band ( band around 1.5 GHz).
  • the above portable terminals must also be able to communicate using a cellular network of GSM 900 type (for Global System for Mobile Communications 900 MHz in English).
  • GSM 900 type for Global System for Mobile Communications 900 MHz in English
  • Antennas that can be used with this type of terminal must therefore be sufficiently compact and meet the constraints mentioned above.
  • the invention consists in proposing a compact multiband antenna in the form of an accessory for PDAs or mobile terminals which is broadband from the point of view of the DVB-H reception, multiband to access the L-band and filtering for the part GSM.
  • the subject of the present invention is therefore a compact multiband antenna, characterized in that it consists of a type element dipole comprising a first conducting arm connected to a second conductive arm having the form of a housing mounted on a ground plane, the first and second arms being supplied with differential and a second slot-like element formed in said ground plane in the extension of said second arm.
  • the first and second arms are rotatably mounted relative to each other. Therefore, it is possible to fold the first arm on the second arm so as to obtain a compact object that can be easily stored in a pocket.
  • the first conducting arm is planar with a triangular flared portion at the connection with the second arm, the triangular flared portion extending through a rectangular or square portion.
  • the specific shape of the second arm provides broadband operation while maintaining a small footprint.
  • the antenna is adapted to cover the UHF band.
  • the second conducting arm has the shape of a housing whose dimensions are adapted to receive an electronic card.
  • this electronic card is compatible with the DVB-H standard and it comprises at least the circuits for receiving the video stream and sending it to the mobile terminal or PDA.
  • the dipole-type element is connected to an adaptation circuit.
  • This adaptation circuit is optimized so as to maximize the transmission between the processing circuits of the video stream and the antenna. It is also dedicated to the lower part of the UHF band, namely the 470 MHz band at 700 MHz and performs an additional filtering function for the GSM band, namely around 900 MHz.
  • the slot-type element comprises two U-shaped slots mounted upside down. These two resonant slots are made in the ground plane in extension the second conducting arm of the dipole element.
  • the resonant slots are sized to achieve proper antenna matching in the L-band, ie between 1452 MHz and 1492 MHz for Europe and between 1670 MHz and 1675 MHz for the United States.
  • the antenna consists of a dipole type element 1 and a slot-like element 2
  • the two functions are not placed next to each other but one in the other.
  • the necessary large size of the ground plane is used to be effective in the UHF band, in order to integrate slots which make it possible to adapt the signal in L-band.
  • the dipole-type element comprises a first arm 10 of shape planar with a substantially triangular flared portion 10a extending through a rectangular portion 10b. This shape was chosen for a minimal size, the flared portion of triangular shape to obtain the desired broadband operation.
  • Part 10 is particularly compact with a total length of 35 mm and a width of 35 mm.
  • This first arm 10 is connected at the end of the triangular flared portion by a connecting element 12 to the second arm 11 of the dipole.
  • the second arm 11 has a volume form, more particularly the shape of a rectangular or square case extended by a planar portion in which the slots will be inserted.
  • the first and second arms of the element 1 are made of a conductive material, namely metal or with a metallized material.
  • the second arm 11 also has a volume portion whose length is 35 mm, the width of 35 mm and the thickness of 16 mm, plus a planar portion.
  • the two arms 10 and 11 are rotatably mounted at the axis 12, so as to fold the arm 10 on the arm 11. for transport.
  • the antenna is in use mode when the arm 10 is unfolded, as shown in FIG. figure 1 .
  • the arm 11 is fixed on a ground plane 3.
  • This ground plane can be, for example, constituted by a conductive material, namely metal or with a metallized material.
  • the antenna comprises a slot-type element 2. More particularly, two U-shaped slots 20, 21 mounted upside down, are made on the metallized plane 3 in the extension of the arm 11. These U-shaped slots are resonant slots and allow to provide a correct adaptation, namely a value for S 11 less than -10 dB at the level of the antenna in the L-band, namely in the 1452 MHz to 1492 MHz band for Europe or the 1670 MHz band at 1675 MHz for the United States.
  • the second arm 11 in the form of a housing is dimensioned and made to be able to receive an electronic card 4 whose one end, namely the end protruding from the housing 11 on the Figure 1B can be inserted into a connector of a portable terminal such as a PDA or the like.
  • an exemplary embodiment of an adaptation circuit that maximizes the transmission between the antenna A and the LNA (Low Noise Amplifier in English), namely the low noise amplifier provided at the input of the processing circuits of the video stream received by the antenna.
  • This matching circuit connects to the antenna at the connection point 12. It comprises, as shown in FIG. figure 2 , two capacitors C1, C11 connected in series between the point of connection to the antenna A and the input of the LNA and two inductors L1, L11 respectively connected between the entry point of the capacitor L1 and the ground for the inductor L1 and between the entry point of the capacity C11 and the mass for the self L11.
  • This adaptation circuit has been optimized to maximize the transmission between the LNA and the antenna at the bottom of the UHF band, namely between 470 MHz and 700 MHz, and to provide an additional filtering function for the GSM band around 900 MHz.
  • This electronic card 4 has a length of between 70 and 80 mm and a width of 35 mm to adapt to said housing.
  • This electronic card therefore comprises an LNA 40 connected to the antenna output, possibly through the adaptation circuit described above.
  • This circuit 40 is connected to a tuner 41 operating for the UHF bands and for the band L.
  • the output of the tuner 41 is sent to a DVB-H demodulator 42.
  • the output of the demodulator is sent to an SDIO interface circuit 43 (FIG. for Secure Digital Input / Output in English). This interface makes it possible to send the video stream to a portable terminal such as a PDA through a 44 SDIO connector.
  • An antenna with its adaptation circuit as described with reference to Figures 1 and 2 has been simulated.
  • An ADS2004 circuit simulator was used to optimize the values and choice of the matching circuit to maximize transmission between the antenna and the LNA.
  • An IE3D electromagnetic simulator was used to give the gain, efficiency and radiation curves as a function of frequency for the antenna associated with its adaptation circuit optimized on the previous software. The simulation gave the curves of Figures 4 to 7 as well as the radiation patterns of the figure 8 .
  • the curve of the figure 4 gives the variations as a function of the frequency of the transmission losses between the antenna and the LNA of the electronic circuit of the figure 3 . It can be seen that these losses are minimized and smoothed over the entire UHF band used with the DVB-H standard (ie between 470 MHz and 700 MHz). However, we see a significant loss around 900 MHz, which shows that the matching circuit performs a filtering function at this frequency.
  • the figure 5 represents the gain of the antenna as a function of frequency. This curve confirms a similar operation to a dipole in the UHF band (theoretically a dipole has a directivity of 2.17 dB) but more directional, in the band L.
  • the gain curve approaches 5 dBi at 1.6 GHz, which is significant of a radiation pattern more directive.
  • the directionality at 1.6 GHz can be explained by the fact of the networking of two radiating slots whose diagrams add up in a preferred direction.
  • the figure 6 represents the efficiency of the antenna system with an adaptation cell as described with reference to the figure 2 .
  • an antenna efficiency better than 60% over the entire UHF band of the DVB-H standard and better than 90% in the entire L band of the DVB-H standard (EP and US) is obtained, but a yield lower than 20% in the GSM band around 900 MHz. This therefore reflects a filtering function in the GSM band.
  • the figure 7 represents the adaptation of the antenna up to 2 GHz, ie it gives the values of the parameters S 11 of the antenna and its adaptation circuit beyond 1 GHz when it is loaded on 50 ohms.
  • an adaptation less than -10 dB is obtained in the L-band.
  • This adaptation is due to the resonance of the slots 20, 21 whose dimensions have been optimized on the location in the ground plane over the length and the width of the slots. to cover both the European L-band 1452-1492 MHz and the L band US 1670-1675 MHz.
  • the figure 8 represents the 600 MHz and 1600 MHz radiation patterns of the figure 1 .
  • the 600 MHz form is typical of a dipole (torus) whose null axis corresponds to the longitudinal axis of the antenna.
  • the shape at 1.6 GHz is both the combination of the diagrams of the two slots as well as the asymmetry of the structure generated by the placement of the slots on the ground plane near a "canister".

Landscapes

  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Support Of Aerials (AREA)
  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Claims (8)

  1. Kompakte Mehrbandantenne, dadurch gekennzeichnet, dass sie durch ein erstes Element (1) von der Art eines Dipols gebildet ist, welches einen ersten leitenden Arm (10) umfasst, welcher mit einem zweiten leitenden Arm (11) verbunden ist, welcher die Form eines Gehäuses aufweist und auf einer Masseebene (3) montiert ist, wobei der erste und der zweite Arm mit einem Differenzial gespeist werden (12), und durch ein zweites Element (2) von der Art eines Schlitzes, welches in der Masseebene in der Verlängerung des zweiten Arms ausgebildet ist.
  2. Antenne nach Anspruch 1, dadurch gekennzeichnet, dass der erste und der zweite Arm zueinander drehbar montiert sind.
  3. Antenne nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der erste Arm (10) planar mit einem ausgeweiteten Abschnitt (10a) an der Verbindung mit dem zweiten Arm ausgebildet ist, welcher Abschnitt durch einen rechteckigen oder quadratischen Abschnitt (10b) verlängert wird.
  4. Antenne nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Gehäuse dimensioniert ist, um eine elektronische Karte (4) aufzunehmen.
  5. Antenne nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Element von der Art eines Dipols an einen Adapterschaltkreis angeschlossen ist.
  6. Antenne nach Anspruch 5, dadurch gekennzeichnet, dass der Adapterschaltkreis eine Filterfunktion realisiert.
  7. Antenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Element (2) von der Art eines Schlitzes zwei U-förmige, gegenläufig angeordnete Schlitze (20, 21) aufweist.
  8. Antenne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie im UHF-Band oder im L-Band mit GSM-Band-Filterung funktioniert.
EP06808268A 2005-09-07 2006-08-31 Kompakte mehrbandantenne Active EP1922783B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0552697 2005-09-07
FR0552987A FR2891666A1 (fr) 2005-10-03 2005-10-03 Antenne multibande compacte
PCT/FR2006/050828 WO2007028918A1 (fr) 2005-09-07 2006-08-31 Antenne multibande compact

Publications (2)

Publication Number Publication Date
EP1922783A1 EP1922783A1 (de) 2008-05-21
EP1922783B1 true EP1922783B1 (de) 2010-04-28

Family

ID=37686028

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06808268A Active EP1922783B1 (de) 2005-09-07 2006-08-31 Kompakte mehrbandantenne

Country Status (7)

Country Link
US (1) US7796090B2 (de)
EP (1) EP1922783B1 (de)
JP (1) JP2009507443A (de)
KR (1) KR20080046168A (de)
CN (1) CN101258643B (de)
DE (1) DE602006014003D1 (de)
WO (1) WO2007028918A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8111204B2 (en) * 2008-01-31 2012-02-07 Silicon Laboratories Inc. Slot antenna for a circuit board ground plane
WO2012154140A1 (en) * 2011-05-06 2012-11-15 Temel Engin Tuncer Nonsymmetric wideband dipole antenna
JP2013021562A (ja) * 2011-07-12 2013-01-31 Furukawa Electric Co Ltd:The 無指向性アンテナ及び無指向性アンテナアレイ
KR101879705B1 (ko) * 2012-01-18 2018-07-18 삼성전자주식회사 휴대용 단말기의 안테나 장치
US9147938B2 (en) 2012-07-20 2015-09-29 Nokia Technologies Oy Low frequency differential mobile antenna
JP5481598B1 (ja) * 2013-05-20 2014-04-23 Ｎｅｃトーキン株式会社 通信装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5608413A (en) * 1995-06-07 1997-03-04 Hughes Aircraft Company Frequency-selective antenna with different signal polarizations
US6466176B1 (en) * 2000-07-11 2002-10-15 In4Tel Ltd. Internal antennas for mobile communication devices
CA2420959C (en) * 2000-08-28 2009-11-03 In4Tel Ltd. Apparatus and method for enhancing low-frequency operation of mobile communication antennas
TWI287317B (en) * 2001-08-23 2007-09-21 Asustek Comp Inc Antenna module combining electrodes of differential-type circuit
CN1545749A (zh) * 2001-09-13 2004-11-10 �����ɷ� 用于微型和多频带天线的多级和空间填充接地板
US20030112200A1 (en) * 2001-12-17 2003-06-19 Alcatel, Radio Frequency Systems, Inc. Horizontally polarized printed circuit antenna array

Also Published As

Publication number Publication date
JP2009507443A (ja) 2009-02-19
CN101258643B (zh) 2011-08-24
US20090135075A1 (en) 2009-05-28
KR20080046168A (ko) 2008-05-26
DE602006014003D1 (de) 2010-06-10
EP1922783A1 (de) 2008-05-21
WO2007028918A1 (fr) 2007-03-15
CN101258643A (zh) 2008-09-03
US7796090B2 (en) 2010-09-14

Similar Documents

Publication Publication Date Title
EP1922783B1 (de) Kompakte mehrbandantenne
US9112284B2 (en) Wireless device capable of multiband MIMO operation
EP0604338B1 (de) Wenig Raum beanspruchende, breitbandige Antenne mit zugehörigem Sendeempfänger
FR3070224A1 (fr) Antenne plaquee presentant deux modes de rayonnement differents a deux frequences de travail distinctes, dispositif utilisant une telle antenne
EP3146593B1 (de) Antennensystem zur verringerung der elektromagnetischen kopplung zwischen antennen
FR2709833A1 (fr) Instrument d'écoute large bande et bande basse pour applications spatiales.
EP2095465A1 (de) Einfach- oder mehrfach-frequenzantenne
FR3052617A1 (fr) Antenne wifi compacte a reflecteur en metamateriau
FR2896341A1 (fr) Antenne compacte portable
Andújar et al. Multiband non-resonant antenna system with reduced ground clearance
WO2007135312A1 (fr) Antenne compacte portable pour la television numerique terrestre avec rejection de frequences
EP1872436B1 (de) Breitbandige dipolantenne
EP2879233A1 (de) Integrierte Funkantenne mit Windungen
WO2010060956A1 (fr) Circuit électrique / électronique pour connecter un dispositif à une antenne radiofréquence
FR2891666A1 (fr) Antenne multibande compacte
EP2879234B1 (de) Elektronisches Gerät mit in einem Gehäuse zusammengefalteter Funkantenne
EP2022141B1 (de) Tragbare kompaktantenne für terrestrisches digitalfernsehen
FR3096514A1 (fr) circuit imprimé comportant plusieurs antennes d’excitation et une antenne parasite, et procédé de fabrication du circuit imprimé.
EP3641058B1 (de) Mehrband-schaltantenne und funkfrequenzvorrichtung, die eine solche antenne umfasst
EP1548877B1 (de) Multibandantenne mit planaren Strahlerflächen und tragbares Telefon mit einer derartigen Antenne
EP1750325A1 (de) Multiband-Antenne
EP2976805A1 (de) Aus mindestens zwei strahlungsdrähten und einer erdungsfläche geformte antenne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080307

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

17Q First examination report despatched

Effective date: 20090320

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

DAX Request for extension of the european patent (deleted)
RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: THOMSON LICENSING

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 602006014003

Country of ref document: DE

Date of ref document: 20100610

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20110131

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006014003

Country of ref document: DE

Representative=s name: DEHNS, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006014003

Country of ref document: DE

Representative=s name: DEHNS PATENT AND TRADEMARK ATTORNEYS, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006014003

Country of ref document: DE

Representative=s name: HOFSTETTER, SCHURACK & PARTNER PATENT- UND REC, DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

Owner name: THOMSON LICENSING DTV, FR

Effective date: 20180830

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20180927 AND 20181005

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006014003

Country of ref document: DE

Representative=s name: DEHNS, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 602006014003

Country of ref document: DE

Owner name: INTERDIGITAL MADISON PATENT HOLDINGS, FR

Free format text: FORMER OWNER: THOMSON LICENSING, ISSY-LES-MOULINEAUX, FR

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006014003

Country of ref document: DE

Representative=s name: DEHNS PATENT AND TRADEMARK ATTORNEYS, DE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230514

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230822

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20230824

Year of fee payment: 18

Ref country code: DE

Payment date: 20230828

Year of fee payment: 18