EP1872436B1 - Antenne large bande de type dipole - Google Patents

Antenne large bande de type dipole Download PDF

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Publication number
EP1872436B1
EP1872436B1 EP06743305.2A EP06743305A EP1872436B1 EP 1872436 B1 EP1872436 B1 EP 1872436B1 EP 06743305 A EP06743305 A EP 06743305A EP 1872436 B1 EP1872436 B1 EP 1872436B1
Authority
EP
European Patent Office
Prior art keywords
antenna
arm
arms
adaptation
connection port
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
EP06743305.2A
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German (de)
English (en)
French (fr)
Other versions
EP1872436A1 (fr
Inventor
Jean-Luc Robert
Philippe Gilberton
Ali Louzir
Jean-François PINTOS
Philippe Minard
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.)
InterDigital Madison Patent Holdings SAS
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InterDigital Madison Patent Holdings SAS
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Publication date
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Publication of EP1872436A1 publication Critical patent/EP1872436A1/fr
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Classifications

    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them

Definitions

  • the present invention relates to a broadband antenna of dipole type, more particularly an antenna for receiving television signals, in particular the reception of digital television signals on a portable electronic device such as a laptop, a PVA (Personal Assistant) or other similar device.
  • a broadband antenna of dipole type more particularly an antenna for receiving television signals, in particular the reception of digital television signals on a portable electronic device such as a laptop, a PVA (Personal Assistant) or other similar device.
  • dipoles as receiving antenna, see in particular the patent US 2002/0109639 .
  • a conventional dipole comprises two identical arms having a length substantially equal to ⁇ / 4 and placed vis-a-vis. The arms are powered by a differential generator.
  • This type of antenna has been studied since the beginnings of electromagnetism and is used in particular for UHF reception and even, more recently, in WLAN type wireless networks. Therefore, it is also known to use dipole antennas whose arms are rotatably mounted to be folded into radio telephony, see in particular the patent US 5,561,437 .
  • the present invention therefore uses the concept of the dipole type antenna to realize a compact broadband antenna covering the whole of the UHF band and associated with an electronic card that can connect to a portable device using, in particular, a USB type connector.
  • the present invention relates to a broadband dipole antenna comprising a first and a second differential-fed conductive arm, the first and the second arms being rotated relative to one another at a zone of articulation located at one end of each arm and having a connection element.
  • each arm has a generally rectangular shape with a curved profile at the area of articulation.
  • the first arm has the shape of a housing in which is inserted an electronic card.
  • the first arm comprises an upper face covering the electronic card. At this upper face may be associated two side faces.
  • the profiles are preferably complementary so as to fold the two arms against each other and to obtain a compact antenna, easily transportable.
  • the electronic card comprises, at one end, a connection port for the supply of the antenna and at the other end a connection port to an electronic device.
  • the connection port to the electronic device is a USB connection port.
  • the electronic card includes circuitry for processing television signals.
  • this dipole antenna essentially comprises a first conducting arm 1 and a second conducting arm 2, the two arms being connected to each other via a hinge zone 3 located at one end of the each arm.
  • the arm 2 is constituted by a rectangular plate made of a metallic, metallized or other conductive material and has a length close to ⁇ / 4 at the central operating frequency, namely close to 112 mm for operation in the UHF band (band between 460 and 870 MHz).
  • This arm 2 has a rectilinear portion 2a and a curved portion 2b allowing the connection at the zone 3 to the other arm 1.
  • the arm 1 has a shape such that it can be used at least as a cover for an electronic card which will be described in detail below.
  • the arm 1 shown in FIGS. Figures 1 and 2 has a rectangular portion 1a forming a housing in which can inserting said electronic card and it is extended by a curved portion 1b forming a progressive flare which allows the energy to be radiated gradually and, in this way, promotes adaptation over a wider frequency band.
  • the length of the arm 1 is also substantially equal to ⁇ / 4.
  • the arm 1 is made of a metallic conductive material, metallized or otherwise.
  • the arms 1 and 2 have nearly identical total lengths, i.e., a length of 118.7 mm in the embodiment shown. More precisely, the rectilinear part has a length of 70 mm and a width of 25 mm.
  • the arm 1 in the form of housing has a height of 10 mm.
  • the two arms 1 and 2 are connected to one another at a hinge zone 3 which comprises at 3a a connection element for connecting the antenna to a generator or receiver circuit for processing electromagnetic signals. .
  • the hinge zone comprises connection elements made using material relatively transparent to the radio waves while the electrical connection is provided by a metal wire, a coaxial or similarly connected to the generator circuit or the electromagnetic signal processing receiver. In order to avoid a short circuit between the metal wire and the arm 2, an opening is necessary in the arm 2.
  • the two arms 1 and 2 are made of a conductive material, in particular metal. Thus, they can be made from metal plates by cutting these plates.
  • the antenna of the figure 2 having the dimensioning given above was simulated using a commercial electromagnetic software (IE3D).
  • IEEE3D commercial electromagnetic software
  • the results of the simulations are given on the curves of Figures 3 to 6 which mainly concern a simulation made on the antenna alone and a simulation made when the antenna is connected to an adaptation circuit such as that which will be described with reference to the figure 11 .
  • the figure 3 represents the impedance matching curves of the antenna of the figure 2 with and without adaptive circuit.
  • the adaptation cell makes it possible to obtain a good adaptation over the entire UHF band, namely the frequency band between 460 - 870 MHz while the curve obtained without an adaptation circuit makes it possible to get a good adaptation on a more restricted frequency band. This is confirmed on Smith's chart of the figure 4 .
  • the figure 5 represents the curves giving the efficiency of the antenna with and without adaptation circuit.
  • the curves obtained confirm the previous results and show that an antenna efficiency greater than 80% is obtained over the entire UHF band in the case of the use of a matching circuit.
  • the radiation pattern of the figure 6 is a radiation pattern in gain that confirms that the antenna of the figure 2 works like a dipole.
  • the arm 2 of the antenna is rotatably mounted relative to the arm 1, so as to orient the antenna for optimal reception.
  • various positions of the arm 2 with respect to the arm 1 have been represented, namely a position in which the angle ⁇ between the two arms is equal to 0 ° referenced 20, a position in which the angle ⁇ between the two arms is substantially equal to 30 ° referenced 21, a position in which the angle ⁇ that the two arms make is substantially equal to 45 ° referenced 22, a position in which the angle ⁇ between the two arms is substantially equal to 60 ° referenced 23 and a position in which the angle ⁇ between the two arms is substantially equal to 90 ° referenced 24.
  • the figure 8 gives the results for the antenna alone. In this case, the antenna is not adapted to the entire UHF frequency. If an adaptation cell such as the one shown in figure 11 In this case, we obtain the adaptation curves of the figure 9 . According to these curves, the upper band is well adapted with a coefficient S11 of less than -6 dB for all the positions of the arm 2 and the lower band is well adapted with S11 less than -6 dB for the positions of the arm 2 between 0 ° and 60 °.
  • the radiation patterns at a frequency of 660 MHz for the different positions of the arm 2 of the antenna.
  • the radiation patterns are inclined as a function of the angle of inclination ⁇ . This inclination optimizes the reception of the digital television signal.
  • FIG. figure 11 An adaptation cell that can be used in the present invention is shown schematically in FIG. figure 11 .
  • the antenna A is connected to the cell constituted by an inductance L and a capacitance C.
  • the antenna is connected in series with the capacitor C which is connected to a low noise amplifier LNA, while the inductor L is mounted between the ground and the point of connection of the antenna to the capacitor C.
  • This adaptation cell has been optimized for an inclined arm with an angle ⁇ equal to 60 °.
  • the antenna comprises an arm 2 identical to the arm 2 of the figure 2 and an arm 1 formed only by the upper face 12 of the housing forming the arm 1 of the figure 2 .
  • the adaptation and efficiency curves represented respectively on the Figures 13 and 14 .
  • the curves of the figure 13 which compares the impedance matching of the antenna of the figure 12 with the antenna of the figure 2 shows that we still get a good adaptation on the entire UHF band.
  • the curves of the figure 14 shows that, in this case, the efficiency of the antenna of the figure 12 is less than that of the antenna of the figure 2 in the lower band due to the elimination of the side and bottom walls of the arm 1 of the figure 2 .
  • the arm 2 is identical to the arm 2 of the antenna of the figures 2 and 12 while the arm 1 has only the upper face 1c and the two side faces 1d.
  • the arm 1 forms a cover fitting on the electronic card.
  • the results of the simulation represented on the figures 16 and 17 show that this embodiment gives results that are substantially identical to the embodiment of the figure 2 .
  • This embodiment has the advantage of being easier to industrialize than the embodiment of the figure 2 .
  • the arm 10 consists of an element having the shape of a rectangular housing whose upper surface is stamped so as to obtain a portion 10c. This stamped portion allows to receive the arm 20 when the latter is folded for transport.
  • the arm 20 has a shape corresponding substantially to a half-ellipse.
  • the dimensions of the arms 10 and 20 are substantially identical and correspond to approximately ⁇ / 4 at the desired operating frequency.
  • the arm 10 and the arm 20 are interconnected at an interconnection zone 30 so as to be rotatable relative to each other.
  • this electronic card may include all the integrated circuits necessary for the processing of a digital television signal.
  • this card 100 thus comprises a low noise amplifier 101 connected to the output of the antenna at the rotation zone 3 or 30 of the antenna, the signal from the LNA amplifier is sent to a tuner 102 and then to a demodulator 103 connected to a USB interface 104.
  • the electronic card being provided with a USB connection port 105. If necessary, the electronic card may be provided with a shielding of the RE part.
  • connection port allowing to connect to an electronic device, can be used, such as, for example, the formats used for memory cards (Compact Flash , SD, XD ).
  • this electronic card has a length of between 70-80 mm and a width of between 15-25 mm so that it can be easily inserted into the arm 1 forming a housing, as shown on the figure 2 .
  • this card is only one example of an electronic card that can be used in the case of the present invention. According to alternative embodiments, this card can also be integrated into a conventional USB key used for the transport of personal data, photos or music.

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  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
EP06743305.2A 2005-04-20 2006-04-13 Antenne large bande de type dipole Active EP1872436B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0551009A FR2884973A1 (fr) 2005-04-20 2005-04-20 Antenne large bande de type dipole
PCT/EP2006/061599 WO2006111509A1 (fr) 2005-04-20 2006-04-13 Antenne large bande de type dipole

Publications (2)

Publication Number Publication Date
EP1872436A1 EP1872436A1 (fr) 2008-01-02
EP1872436B1 true EP1872436B1 (fr) 2019-07-03

Family

ID=34955053

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06743305.2A Active EP1872436B1 (fr) 2005-04-20 2006-04-13 Antenne large bande de type dipole

Country Status (8)

Country Link
US (1) US8130163B2 (ko)
EP (1) EP1872436B1 (ko)
JP (1) JP4841621B2 (ko)
KR (1) KR101255688B1 (ko)
CN (1) CN101164197B (ko)
FR (1) FR2884973A1 (ko)
HK (1) HK1111268A1 (ko)
WO (1) WO2006111509A1 (ko)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2889362B1 (fr) * 2005-08-01 2007-10-19 Thomson Licensing Sas Systeme d'antennes a diversite de type dipole
FR2901063A1 (fr) * 2006-05-12 2007-11-16 Thomson Licensing Sas Antenne compacte portable pour la television numerique terrestre
US8963795B1 (en) 2012-10-15 2015-02-24 L-3 Communications Corp. Wedge shaped scimitar antenna
CN107591609A (zh) * 2016-07-07 2018-01-16 南方科技大学 多频带天线、多频带天线装置及钟表

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6266017B1 (en) * 1992-04-08 2001-07-24 3Com Corporation Retractable antenna system
US5561437A (en) * 1994-09-15 1996-10-01 Motorola, Inc. Two position fold-over dipole antenna
US6612874B1 (en) 2000-09-08 2003-09-02 3Com Corporation Rotating connector adapter with strain relief
FR2818018B1 (fr) * 2000-12-12 2003-02-14 Thomson Csf Antenne rayonnante a isolation galvanique
JP3830773B2 (ja) * 2001-05-08 2006-10-11 三菱電機株式会社 携帯電話機
US6544075B1 (en) 2002-04-24 2003-04-08 Accton Technology Corporation Wireless adapter
JP3789424B2 (ja) * 2002-11-20 2006-06-21 埼玉日本電気株式会社 携帯端末
JP2004201108A (ja) * 2002-12-19 2004-07-15 Sony Corp 高周波信号受信装置
JP4053418B2 (ja) 2002-12-26 2008-02-27 三菱電機株式会社 アンテナ装置及び携帯電話
US6842149B2 (en) * 2003-01-24 2005-01-11 Solectron Corporation Combined mechanical package shield antenna
US6758689B1 (en) * 2003-05-29 2004-07-06 Interlink Electronics, Inc. Wireless adapter having foldable geometrically loop-like antenna
US6975274B2 (en) 2003-06-27 2005-12-13 Microsoft Corporation Automatic antenna orientation for USB pass-through port
US20070060089A1 (en) * 2005-09-12 2007-03-15 James Owen Wi-Fi network locator with directional antenna and wireless adaptor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN101164197A (zh) 2008-04-16
EP1872436A1 (fr) 2008-01-02
JP4841621B2 (ja) 2011-12-21
KR20070120536A (ko) 2007-12-24
HK1111268A1 (en) 2008-08-01
KR101255688B1 (ko) 2013-04-17
FR2884973A1 (fr) 2006-10-27
US8130163B2 (en) 2012-03-06
JP2008537419A (ja) 2008-09-11
CN101164197B (zh) 2012-12-26
US20090066599A1 (en) 2009-03-12
WO2006111509A1 (fr) 2006-10-26

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