EP1548877A1 - Multibandantenne mit planaren Strahlerflächen und tragbares Telefon mit einer derartigen Antenne - Google Patents

Multibandantenne mit planaren Strahlerflächen und tragbares Telefon mit einer derartigen Antenne Download PDF

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Publication number
EP1548877A1
EP1548877A1 EP04293084A EP04293084A EP1548877A1 EP 1548877 A1 EP1548877 A1 EP 1548877A1 EP 04293084 A EP04293084 A EP 04293084A EP 04293084 A EP04293084 A EP 04293084A EP 1548877 A1 EP1548877 A1 EP 1548877A1
Authority
EP
European Patent Office
Prior art keywords
radiation
antenna according
mhz
antenna
switches
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
Application number
EP04293084A
Other languages
English (en)
French (fr)
Other versions
EP1548877B1 (de
Inventor
Fernando Romao
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.)
Apple Inc
Original Assignee
Sagem SA
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
Application filed by Sagem SA filed Critical Sagem SA
Publication of EP1548877A1 publication Critical patent/EP1548877A1/de
Application granted granted Critical
Publication of EP1548877B1 publication Critical patent/EP1548877B1/de
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01Q9/0407—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
    • 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
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • 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
    • 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
    • H01Q9/0442—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular tuning means
    • 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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • 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
    • H01Q9/06—Details
    • H01Q9/14—Length of element or elements adjustable
    • H01Q9/145—Length of element or elements adjustable by varying the electrical length

Definitions

  • the present invention relates to a surface-type antenna (s) radiant (s) flat (s).
  • the invention notably proposes an antenna of this type capable of being used in transmission / reception on at least two frequency bands, and having improved performance compared to the antennas of the state of the technical.
  • PIFA Planar Inverted-F Antenna
  • plane antenna of type F inverted which comprise, as illustrated in FIG. mass 1 and a plane conductive surface 2 which is superimposed on this plane mass 1, and extends to the right and parallel to it.
  • Such an arrangement has a resonant wavelength that is function of the dimensions of the plane conductive surface 2 and the height which separates it from its mass plan 1.
  • the planar conductive surface 2 comprises a current driving point A and a grounding plane G.
  • the resonance frequency is notably related to the greatest peripheral length L AG between the point A and the point G, the length L AG being referenced 3 in Figure 1. It is also added to L AG twice the length h to obtain a length to find the resonant frequency of the antenna.
  • These antennas have, in particular, an important advantage in term congestion and aptitude for integration into phones mobile.
  • FIGS. 3A to 3C show that antennas are known allowing to radiate on several frequencies.
  • the low resonance frequency is defined by the length denoted L B and the high resonance frequency by the length denoted L H.
  • L B we define L B by the longest path on surface 2 to go from A to G, to which the distance h is added twice.
  • L H by an equivalent dimension of the slot to which we add twice the distance h.
  • the calculation of L H is known to those skilled in the art.
  • Figure 4 shows that we also know multiband antennas transmission / reception having at least one plane surface 2 of radiation having two slots 30 separating sections of radiation 21, 22 and 23.
  • the radiation sections 21, 22 and 23 are connected by means Z 1 and Z 2 defining adaptive passive circuits known to those skilled in the art which, on transmission as on reception, are resonant on simultaneously at least two frequency bands.
  • the means Z 1 and Z 2 define passive matching circuits and are generally connected in parallel with capacitive or inductive means themselves connected in series with means able to be switched selectively between a passing state and a starch. blocked.
  • the capacitive or inductive means offset the resonance bands of the antenna, depending on whether the means capable of being switched are in the on state or in the off state.
  • the means Z 1 and Z 2 comprise a plug circuit known to those skilled in the art which will be equivalent to an inductor for the low frequencies and a capacity for the high frequencies.
  • the antennas of FIGS. 3A to 4 provide performance of acceptable radiation, especially in far-field measurements, while locally producing a weaker near field than whip antennas or helical antennas known elsewhere.
  • the antennas of the state of the art of FIGS. 3A to 4 are designed so that multiband performance is average in the different bands.
  • WO 01/20718 discloses an antenna according to the preamble of claim 1.
  • the invention proposes to overcome these disadvantages.
  • An object of the invention is to overcome at least one of the disadvantages of antennas of the prior art.
  • one of the aims of the invention is to propose an antenna for which multiband performance is very close to several single-band antennas.
  • Another aim of the invention is to propose an antenna having several resonance bands and having very high bandwidth important compared to multiband antennas of the state of the art.
  • Another aim of the invention is to propose an antenna having several resonance bands and having a very high efficiency important compared to multiband antennas of the state of the art.
  • Another aim of the invention is to propose an antenna with several resonance bands, of which at least one in the GSM domain and at least one in the field of DCS 1800, the antenna overcoming at least one of the disadvantages of antennas of the prior art.
  • the invention provides an antenna according to claim 1.
  • the current of Switches control arrives at the antenna by the point of attack.
  • the invention also relates to a telephone comprising an antenna according to the invention.
  • An antenna according to the invention may also comprise more than one flat radiant surface.
  • the radiating surface 2 is connected with a side to the ground plane 1 (connection point G) and the other to an electronic supply / reception of RF signals (connection point A).
  • the radiating surface 2 is divided into at least two radiation zones 51 and 52 separated by a junction 4 formed on most of its length a slot.
  • the radiation surface 2 can of course have more than two radiation zones 51 and 52 and more than one junction 4.
  • the ends of the junction 4 located on the periphery 7 of the radiation surface 2 comprise means 60 forming links mechanical and electrical switches between the zones of radiation 51 and 52.
  • the electrical switches 60 are capable of resonating all or part of the radiation surface 2 by electrically connecting all or part of the radiation zones.
  • Figure 5 shows that at least the area 51 of radiation has at least one slot 5 of radiation.
  • the opening 6 of the slot 5 is located at the periphery 7 of the radiation surface 2.
  • FIG. 5 thus shows that the opening 6 of the slot 5 comprises means 61 capable of forming a mechanical connection between the two sides the slot 5 at the periphery 7 of the radiation surface 2.
  • the means 61 also form electrical switches between these two sides.
  • the means 61 are able to allow the circulation of current on the periphery 7 of the radiation surface 2 in a state closed, or to allow current flow on the periphery internal 8 of the slot 5 in an open electrical state.
  • the surface of FIG. 5 is equivalent to a radiating surface 2 such that represented in FIG. 6A. All areas of radiation are electrically connected to each other.
  • the radiation surface 2 is suitable for radiate according to the global system of mobile communications (GSM) and there is a flow of current as indicated by the reference 3, namely a circulation on the inner periphery 8 of the slot 5.
  • GSM global system of mobile communications
  • the slot 5 is able to allow the radiation of the surface 2 radiation at around 900 MHz, preferably in accordance with the global mobile communications system (GSM), including 824 MHz at 960 MHz.
  • GSM global mobile communications system
  • Zone 52 is not electrically connected to zone 51, although it is always mechanically connected to it.
  • the radiation surface 2 is suitable for to radiate in the frequency band around 1800 MHz, preferably that of the DCS 1800 or “Digital Communication System” (DCS) 1800 MHz “, in particular from 1710 MHz to 1990 MHz.
  • DCS Digital Communication System
  • the multiband performance of the antennas according to the invention are very close to those of n single-band antennas.
  • -5 dB of reflection rate on the edge of band is a suitable value. This corresponds to an antenna with a loss of 1.5 dB at the edge of the band from the center of bandaged.
  • the switch means is realized by means of active switches with low loss and high insulating power.
  • the means 60 and 61 can be used for switches having a PIN diode, ie a semiconductor comprising an intrinsic region (formed of a semiconductor intrinsic) between two regions, one type P, the other type N.
  • a PIN diode ie a semiconductor comprising an intrinsic region (formed of a semiconductor intrinsic) between two regions, one type P, the other type N.
  • the PIN diode preferably comprises in the on state a very low resistance, for example of the order 1 Ohm.
  • the PIN diode preferably includes in the blocked state a capacitance very low, for example of the order 0.1 pF.
  • means 60 and 61 for having an active element of the field-effect transistor type or a active diode, for example at least one BAR type diode 88.
  • such an active diode will have, for example, a through current of 25 mA for a resistance R on 0.5 Ohm and a voltage across its 0.8 volt.
  • Such an active diode will have a through current of 0 mA for a capacitance C off of 0.22 pF for a voltage at its terminals greater than 10 volts.
  • Two BAR diodes 88 are then available to provide sufficient isolation.
  • the voltage across the active diode is preferentially greater than 20 volts.
  • Figure 7 shows schematically a possible control device of the active diode.
  • a control terminal 79 is provided to control, through a resistor 80, means 78 forming a transistor.
  • the means 78 are also connected on the one hand to a voltage of control of 3 or 5 volts on a terminal 83 and secondly at a voltage of -20 Volt for example on a terminal 81, for example through the resistors 77 and 76.
  • This voltage of -20 Volt prevents the formation harmonics and allows the blocking of the diode.
  • a branch is connected with a shock inductor 74 by the terminal 82 located between the resistors 77 and 76.
  • Said branch connects means 78 to a current source of RF radio frequency, connected to the control device in point 73.
  • the inductor 74 has a very high impedance for radio frequencies.
  • the radiofrequency power source is connected to the antenna from of the terminal 73 via the two diodes 71 and 72, passing through that Sens.
  • a decoupling capacitor 75 having a very low impedance for the radio frequencies, is arranged between the mass and the terminal 82.
  • Figure 8 schematically shows another embodiment possible a radiation surface according to the invention.
  • the surface comprises three zones of radiation 51, 52 and 53.
  • the zones 51 and 53 are separated from each other by the junction 41 which comprises a slot having at its ends the means E 1 and E 2 .
  • the means E 1 are located on the periphery 7 of the surface, while the means E 2 are located in the middle of the radiation surface 2.
  • the grounding point G is located on zone 51, while the A point of attack is located on the zone 53.
  • a control circuit 90 described in more detail in Figure 9, is connected to the point of attack.
  • junction 41 and the means E 1 and E 2 makes it possible to force the passage of the direct current from the point A towards the point G through the periphery 7 of the radiating surface.
  • the means E 1 and E 2 comprise decoupling capabilities GSM and DCS.
  • Capacities are typically of the order of 22 pF in size 0402.
  • This control device therefore defines two different paths for the direct current and for the radiofrequency current.
  • the means E 1 and E 2 are indeed transparent for radio frequency currents.
  • the zones 51 and 53 on the one hand are separated from the zone 52 on the other hand by the junction 42 which comprises a slot having at its ends, on the periphery 7 of the surface 2, the means S 1 and S 2 .
  • junctions 41 and 42 are located substantially perpendicularly between them.
  • Two BAR type diodes 88 are preferentially placed at S 1 and two diodes at S 2 , in order to obtain the appropriate isolation value.
  • the passing directions of the diodes are placed so that a current can flow from A to G on the periphery 7 of the surface 2.
  • a slot 5 made in the zone 52 makes it possible to give the surface 2 GSM resonance.
  • the control system 90 is shown schematically in the figure 9.
  • a control terminal 83 connected to a 25 mA current source by example is provided to control means 78 electrical switch.
  • the means 78 are also connected to a voltage of -20 Volts per example on a terminal 81, for example through the resistor 76. This voltage of -20 volts prevents the formation of harmonics.
  • a branch is connected with a shock inductor 74 by the terminal 82 located between the means 78 and the resistor 76.
  • Said branch connects means 78 to a current source of RF radio frequency, connected to the control device in point 73.
  • the inductor 74 has a very high impedance for radio frequencies.
  • the radiofrequency power source is connected to the antenna from of the terminal 73 via at least one diode 71, passing through that Sens.
  • a decoupling capacitor 75 having a very low impedance for the radio frequencies, is arranged between the mass and the terminal 82.
  • the GSM mode is engaged when the means 78 are in a closed state
  • the DCS mode is engaged when the means 78 are in an open state.
  • the switch means may also include electromechanical microsystems of a MEMS or microelectronic technology mechanical system "according to the English terminology generally used by those skilled in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
EP04293084.2A 2003-12-23 2004-12-22 Multibandantenne mit planaren Strahlerflächen und tragbares Telefon mit einer derartigen Antenne Ceased EP1548877B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0315313A FR2864353B1 (fr) 2003-12-23 2003-12-23 Antenne a surface(s) rayonnante(s) plane(s) multibande et telephone portable comportant une telle antenne.
FR0315313 2003-12-23

Publications (2)

Publication Number Publication Date
EP1548877A1 true EP1548877A1 (de) 2005-06-29
EP1548877B1 EP1548877B1 (de) 2014-03-05

Family

ID=34531346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04293084.2A Ceased EP1548877B1 (de) 2003-12-23 2004-12-22 Multibandantenne mit planaren Strahlerflächen und tragbares Telefon mit einer derartigen Antenne

Country Status (2)

Country Link
EP (1) EP1548877B1 (de)
FR (1) FR2864353B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2523253A1 (de) * 2011-05-13 2012-11-14 HTC Corporation Tragbare Vorrichtung und Planarantenne damit

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780724A (en) * 1986-04-18 1988-10-25 General Electric Company Antenna with integral tuning element
GB2335798A (en) * 1998-03-26 1999-09-29 Nec Technologies Enhanced bandwidth antenna
WO2001020718A1 (en) * 1999-09-10 2001-03-22 Avantego Ab Antenna arrangement
EP1094542A2 (de) * 1999-10-18 2001-04-25 Matsushita Electric Industrial Co., Ltd. Antenne für mobile Funkkommunikation und tragbares Funkgerät mit einer derartigen Antenne
US6362789B1 (en) * 2000-12-22 2002-03-26 Rangestar Wireless, Inc. Dual band wideband adjustable antenna assembly
EP1304765A2 (de) * 2001-10-22 2003-04-23 Filtronic LK Oy Interne Mehrbandantenne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0301200D0 (sv) * 2003-04-24 2003-04-24 Amc Centurion Ab Antenna device and portable radio communication device comprising such an antenna device
SE528017C2 (sv) * 2004-02-02 2006-08-08 Amc Centurion Ab Antennanordning och bärbar radiokommunikationsanordning innefattande sådan antennanordning

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4780724A (en) * 1986-04-18 1988-10-25 General Electric Company Antenna with integral tuning element
GB2335798A (en) * 1998-03-26 1999-09-29 Nec Technologies Enhanced bandwidth antenna
WO2001020718A1 (en) * 1999-09-10 2001-03-22 Avantego Ab Antenna arrangement
EP1094542A2 (de) * 1999-10-18 2001-04-25 Matsushita Electric Industrial Co., Ltd. Antenne für mobile Funkkommunikation und tragbares Funkgerät mit einer derartigen Antenne
US6362789B1 (en) * 2000-12-22 2002-03-26 Rangestar Wireless, Inc. Dual band wideband adjustable antenna assembly
EP1304765A2 (de) * 2001-10-22 2003-04-23 Filtronic LK Oy Interne Mehrbandantenne

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2523253A1 (de) * 2011-05-13 2012-11-14 HTC Corporation Tragbare Vorrichtung und Planarantenne damit
US8780007B2 (en) 2011-05-13 2014-07-15 Htc Corporation Handheld device and planar antenna thereof

Also Published As

Publication number Publication date
EP1548877B1 (de) 2014-03-05
FR2864353B1 (fr) 2006-08-04
FR2864353A1 (fr) 2005-06-24

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