EP1872436A1 - Antenne large bande de type dipole - Google Patents
Antenne large bande de type dipoleInfo
- Publication number
- EP1872436A1 EP1872436A1 EP06743305A EP06743305A EP1872436A1 EP 1872436 A1 EP1872436 A1 EP 1872436A1 EP 06743305 A EP06743305 A EP 06743305A EP 06743305 A EP06743305 A EP 06743305A EP 1872436 A1 EP1872436 A1 EP 1872436A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- arm
- antenna
- antenna according
- electronic card
- 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.)
- Granted
Links
- 230000000295 complement effect Effects 0.000 claims description 2
- 230000006978 adaptation Effects 0.000 description 18
- 238000004088 simulation Methods 0.000 description 7
- 230000005855 radiation Effects 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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
- 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.
- the present invention therefore uses the concept of the dipole type antenna to provide a compact broadband antenna covering the entire UHF band and associated with an electronic card that can connect to a portable device using, in particular, a connector of USB type.
- the present invention relates to a dipole-type broadband antenna comprising a first and a second differential-powered conducting arm.
- one of the arms, said first arm forms at least one cover for an electronic card.
- 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 first and second arms are rotatably mounted relative to each other and each arm has a generally rectangular shape with a curved profile, the profiles being preferably complementary so as to be able to fold the two arms. against each other and thus 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.
- FIG. 1 is a side perspective view of a first embodiment embodiment of an antenna according to the present invention.
- Figure 2 is a perspective view of the antenna of Figure 1.
- FIG. 3 represents adaptation curves S11 as a function of frequency for the antenna of FIG. 2, respectively with and without matching circuit.
- Figure 4 shows a Smith chart of the antenna of Figure 2 with and without matching circuit.
- Figure 5 shows curves giving the efficiency of the antenna as a function of frequency with or without matching circuit.
- Figure 6 is a radiation pattern in gain of the antenna of Figure 2.
- Figure 7 is a representation identical to the representation of Figure 1 wherein the second arm takes different positions.
- FIG. 8 represents curves giving the adaptation as a function of the frequency for the different positions of the arm 2 represented in FIG. 7.
- Figure 9 shows curves giving the adaptation of the antenna as a function of frequency for the different positions of the arm 2 shown in Figure 7 when the antenna is followed by a matching circuit.
- Figure 10 shows the radiation patterns in gain of the antenna of Figure 7, for the different positions of the arm 2.
- Figure 11 shows schematically an adaptation circuit provided at the antenna output.
- Figure 12 is a schematic perspective view of a second embodiment of an antenna according to the present invention.
- FIG. 13 and FIG. 14 respectively represent curves giving the adaptation as a function of the frequency and the curves giving the efficiency of the antenna as a function of frequency, respectively for the antenna of FIG. 12 compared to FIG.
- Figure 15 is a schematic perspective view of a third embodiment of the present invention.
- FIG. 16 and FIG. 17 respectively represent frequency matching versus antenna efficiency versus frequency curves for the antenna of FIG. 15 in comparison with the antenna of FIG. 2.
- Figure 18 is a schematic perspective view of a fourth embodiment of the present invention, and Figure 19 is a schematic view of an electronic card used in the present invention.
- FIGS. 1 and 2 A first embodiment of a compact broadband antenna for use in receiving digital terrestrial television on a portable computer according to the present invention will first be described with reference to FIGS. 1 and 2.
- this dipole antenna essentially comprises a first conducting arm 1 and a second conducting arm 2, the two arms being connected to one another via a zone d articulation 3 located at one end of each of the arms.
- 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. More specifically, the arm 1 shown in FIGS.
- 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, namely 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 Figure 2 having the dimensioning given above, was simulated using a commercial electromagnetic software (IE3D). In these simulations, the antenna is assumed in the air and consists of a conductive material having good conductivity ( ⁇ > 5.10 7 S / m). 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 FIG. 11.
- IEEE3D commercial electromagnetic software
- Figure 3 shows the impedance matching curves of the antenna of Figure 2 with and without matching 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.
- Figure 5 shows the curves giving the efficiency of the antenna with and without matching 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 FIG. 6 is a gain radiation pattern which confirms that the antenna of FIG. 2 functions as a dipole.
- FIG. 7 shows different positions of the arm 2 relative to the arm 1, 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.
- FIG. 8 represents the various curves giving the impedance matching as a function of the frequency for the different positions of the arm 2.
- 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 that represented in FIG. 11 is used, the adaptation curves of FIG. 9 are obtained in this case. According to these curves, the upper band is well adapted with a coefficient S11. less than -6dB for all the positions of the arm 2 and the lower band is well adapted with S11 less than -6dB for the positions of the arm 2 between 0 ° and 60 °.
- FIG 10 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 according to the angle of inclination ⁇ . This inclination optimizes the reception of the digital television signal.
- FIG. 11 An adaptation cell that can be used in the present invention is shown schematically in FIG. 11.
- the antenna A is connected to the cell consisting of an inductor L and a capacitor 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 connected between the ground and the point of connection of the antenna to the capacitor C.
- LNA low noise amplifier
- This adaptation cell has been optimized for an inclined arm with an oc angle equal to 60 °.
- the antenna comprises an arm 2 identical to the arm 2 of FIG. 2 and an arm 1 constituted only by the upper face 12 of the casing forming the arm 1 of FIG. 2.
- the curves of adaptation and efficiency shown respectively in FIGS. 13 and 14 are obtained.
- the curves of FIG. 13 which compares the impedance matching of the antenna of FIG. 12 with the antenna of FIG.
- Figure 2 shows that we still obtain a good adaptation over the entire UHF band.
- the curves of FIG. 14 show that, in this case, the efficiency of the antenna of FIG. 12 is lower than that of the antenna of FIG. 2 in the lower band due to the elimination of the side walls and lower arm 1 of FIG.
- FIGS. 15, 16 and 17 A third embodiment of the present invention will now be described with reference to FIGS. 15, 16 and 17.
- the arm 2 is identical to the arm 2 of the antenna of 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 shown in FIGS. 16 and 17 show that this embodiment gives results that are substantially identical to the embodiment of FIG. 2.
- This embodiment has the advantage of being easier to industrialize than the mode of production. realization of 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 coming from the LNA amplifier is sent on a tuner 102 and a demodulator 103 connected to a USB interface 104.
- the electronic card is provided with a USB connection port 105. If necessary, the electronic card can be provided with a shielding of the RE part.
- connection port allowing to connect to an electronic device
- the formats used for memory cards can be used, such as, for example, the formats used for memory cards (Compact Flash , SD, XD ). It is possible to make this electronic card so that it has a length of between 70-80 mm and a width of between 15-25 mm so that it can easily be inserted into the arm 1 forming a housing, as shown in FIG.
- 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.
Landscapes
- Details Of Aerials (AREA)
- Support Of Aerials (AREA)
Abstract
Description
Claims
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 true EP1872436A1 (fr) | 2008-01-02 |
EP1872436B1 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 (fr) |
EP (1) | EP1872436B1 (fr) |
JP (1) | JP4841621B2 (fr) |
KR (1) | KR101255688B1 (fr) |
CN (1) | CN101164197B (fr) |
FR (1) | FR2884973A1 (fr) |
HK (1) | HK1111268A1 (fr) |
WO (1) | WO2006111509A1 (fr) |
Families Citing this family (4)
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)
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 |
-
2005
- 2005-04-20 FR FR0551009A patent/FR2884973A1/fr active Pending
-
2006
- 2006-04-13 EP EP06743305.2A patent/EP1872436B1/fr active Active
- 2006-04-13 JP JP2008507063A patent/JP4841621B2/ja active Active
- 2006-04-13 CN CN2006800131618A patent/CN101164197B/zh active Active
- 2006-04-13 WO PCT/EP2006/061599 patent/WO2006111509A1/fr not_active Application Discontinuation
- 2006-04-13 KR KR1020077023800A patent/KR101255688B1/ko active IP Right Grant
- 2006-04-13 US US11/918,685 patent/US8130163B2/en active Active
-
2008
- 2008-05-27 HK HK08105896.6A patent/HK1111268A1/xx unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2006111509A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR101255688B1 (ko) | 2013-04-17 |
EP1872436B1 (fr) | 2019-07-03 |
JP4841621B2 (ja) | 2011-12-21 |
HK1111268A1 (en) | 2008-08-01 |
CN101164197A (zh) | 2008-04-16 |
CN101164197B (zh) | 2012-12-26 |
KR20070120536A (ko) | 2007-12-24 |
FR2884973A1 (fr) | 2006-10-27 |
JP2008537419A (ja) | 2008-09-11 |
US8130163B2 (en) | 2012-03-06 |
WO2006111509A1 (fr) | 2006-10-26 |
US20090066599A1 (en) | 2009-03-12 |
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Inventor name: PINTOS, JEAN-FRANCOIS Inventor name: LOUZIR, ALI Inventor name: GILBERTON, PHILIPPE Inventor name: ROBERT, JEAN-LUC Inventor name: MINARD, PHILIPPE |
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