WO2001089031A1 - Antenna arrangement - Google Patents
Antenna arrangement Download PDFInfo
- Publication number
- WO2001089031A1 WO2001089031A1 PCT/SE2001/001078 SE0101078W WO0189031A1 WO 2001089031 A1 WO2001089031 A1 WO 2001089031A1 SE 0101078 W SE0101078 W SE 0101078W WO 0189031 A1 WO0189031 A1 WO 0189031A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- ground plane
- antenna
- connector element
- arrangement
- conductive space
- Prior art date
Links
Classifications
-
- 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
- H01Q1/243—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 with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
-
- 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
- H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means
Definitions
- the present invention relates to an antenna arrangement of the type that comprises a ground plane spaced apart from an antenna plane for use in a mobile communication device.
- the invention concerns the ground plane dependent antennas.
- the invention also concerns a communication device including such an antenna.
- the wireless forms of communications have become a standard way of communication.
- means for conducting a wireless communication such as cordless telephones, lap top computers with wireless modems, satellite and cellular telephones.
- the communication device i.e. the mobile handsets rapidly become smaller and lighter and the globalisation demand, multiple communication functions and standards being combined into a single unit, e.g. for communicates in multiple frequency bands.
- radiotelephone systems There are a variety of different radiotelephone systems in use today.
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- GSM Global System for Mobile telecommunication
- AMPS Advanced Mobile Phone System
- DAMPS Digital Advanced Mobile Phone System
- PCS Personal Communication Services
- DCS Digital Communication System
- PCN Personal Communication Networks
- the antenna requires a load, either capacitive or inductive.
- An inductive load consists of slots within the antenna and a capacitive load is formed by either a dielectric material placed at certain locations or bringing the metal closer to the ground plane. Both methods of forming a capacitive load require three-dimensional structures.
- a parasitic (or galvanic coupled) element may be placed above the antenna, where this parasitic element would have a resonance at a higher frequency band.
- This layered construction of the antenna requires more complex mass-production techniques than single layer microstrip antennas.
- the antenna may consist of several elements parallel to each other. Although the antenna consists of only one layer, the parallel elements have a strong coupling, making it difficult to tune each element separately.
- the antenna designers invest a great deal of time for designing the half of the antenna, i.e. the radiator part, while the second half, i.e. ground plane, has not been changed remarkably in past years.
- an antenna arrangement having a ground plane, which in one embodiment can be is provided with a notch. Changing the size of the notch changes the radiation characteristics.
- the main object of the present invention is to provide an antenna of ground plane dependent type, which through a new tuned ground plane structure, provides enhanced antenna characteristics.
- Other object of the invention is to provide a ground plane that can be a part of the matching component in a communications device.
- the ground plane in the initially mentioned antenna arrangement is arranged with a specific length and/or pattern so that it is tuneable and arranged as at least a part of a matching circuit.
- the ground plane is provided with at least one non-conductive space arranged as a capacitive and/or inductive load, that the capacitive load in from of said non-conductive space is arranged in a distance from said connector element and that said inductive load in from of said non-conductive space is arranged close to said connector element.
- said ground plane has an electrical length, electrically sufficient for good performance of antenna. Most preferably, said electrical length is > 1/4 ⁇ , wherein ⁇ is the antenna's operation wavelength.
- the ground plane is provided with at least one non-conductive space arranged as a capacitive and/or inductive load. In one embodiment said ground plane is arranged through etching on a circuit board. A capacitive load in from of a non-conductive space is arranged in a distance from the connector elements. An inductive load in from of a non-conductive space is arranged close to the connector elements.
- an antenna arrangement comprising an antenna element arranged spaced apart from a ground plane and provided with at least one feeding connector element and at least one ground connector element.
- the method is accomplished by arranging said ground plane with a specific length and/or pattern so that it is tuned and arranged as at least a part of a matching circuit.
- the invention also concerns a communication arrangement comprising an internally arranged antenna device, comprising an antenna element arranged spaced apart from a ground plane and provided with at least one feeding connector element and at least one ground connector element.
- the ground plane is provided with a specific length and/or pattern so that it is tuned and arranged as at least a part of a matching circuit.
- the communication arrangement may be a cellular phone or a Bluetooth-based device.
- Fig. 1 is a schematic top view of a preferred embodiment of an antenna according to the present invention
- Fig. 2 is a cross-section along line A-A in fig. 1,
- Fig. 3 shows a magnified view of the encircled section in fig. 2
- Fig. 4 is a cross-section along line B-B in fig. 1, illustrating a first embodiment
- Fig. 5 shows a magnified view of the encircled section in fig. 4.
- the main features of the present invention include changing the characteristics of the ground plane, among others through altering its electrical length (with respect to the antenna element) and/or arranging inductive or capacitive loads.
- reference sign 10 denotes an antenna arrangement, comprising an antenna element 11, a ground plane 12, connector elements 13 and 14, and a spacer 15.
- the antenna element 11 is a dual or multi band antenna consisting of a conductive sheet provided with a substantially longitudinal and vertical slit 16 or non-conductive space.
- slits 16 if arranged, may have other shape and location on the antenna element. In case of a single band antenna the slit 16 can be eliminated.
- the connector element 13 is arranged as a substantially S-shaped clip or clasp (figs. 2 and 3). Clearly, the shape of the clip is not limited to S-shape and can be varied.
- the connector element 13 is arranged to connect the antenna element 11 to a feed point 17 on a PCB 18.
- the connector element 14 is arranged to connect the ground plane 12 and antenna element 11. The feed and grounding points can be connected to the sender/receiver circuitry (not shown) of the communication device.
- the connector clip 13 (figs. 2-3) comprises a first end 21 connecting to the antenna element 11.
- the clip as mentioned above is substantially S-shaped, having a first section 131 (fig. 3) and a second section 132.
- the first section 131 comprises two substantially parallel portions 133 and 134, also substantially parallel to the antenna element 11 and ground plane 12. The distance between said first and second portions corresponds to the spacer 15.
- the second portion is substantially "nose"-sha ⁇ ed having an inclining section 135, which ends in a connector end 136.
- the portion 133 is arranged with a bulging 137.
- the clip is connected to the antenna element 11, at the end section 21 through an extension 139, which extends inside a groove on the antenna element.
- the end 21 can be fixed in place by means of a rivet, a weld, conductive adhesive, etc.
- a rivet By prearranging the grooves on the antenna element 11, it is possible to obtain a distinct distance between the ends 21 and 22 of the clips, which affects the antenna characteristics.
- the ground plane 12 can be longer than the antenna element 11, which gives it a longer electrical length. It is important that the antenna has an electrical length, electrically sufficient for good performance, preferably it can be > 1/4 ⁇ , wherein ⁇ is the antenna's operation wavelength. Moreover, it is at one end arranged with slits 121 and 122, which form the capacitive and inductive loads.
- the length of the ground plane, the number of slits, their shape and position can vary with respect to the desired antenna characteristics. A good capacitive characteristic is obtained if the capacitive load is placed distanced from the feeding points (21, 22) and a good inductive load is obtained if the inductive load is placed close to the feeding points.
- the capacitive load can be modified by bending at least part of the ground plane with respect to the antenna element.
- the characteristics of the loads of the ground plane affect the characteristics of the entire antenna.
- the ground plane is a part of antenna separate from the PCB. However, it can be arranged as a part of the PCB, e.g. through etching a specific pattern on one side of the PCB. Thus, it is important that the RF ground is adjusted to increase the performance.
- the feeding connector clip 13 (fig. 3) is isolated from the ground plane 12 through an opening 20 in the ground plane 12. For this reason, the spacer 15 is provided with an extension 151, on which some part of the section 133 bears against, which distances it from the ground plane 12. It is also possible to isolate the clip 13 from the ground plane 12 in another ways.
- the connector clip 14 is disclosed in more detail.
- the clip 14 according to this embodiment is a substantially U-shaped part connecting between the antenna element and the ground plane.
- the shape of the clips is not limited to U-shape and can be varied.
- the ground plane 12 can be connected to ground, e.g. in case of a PIFA, through a pin 14' shaped as prying from the PCB or other section connecting to the ground plane.
- the antenna has a modular structure, comprising of parts which can be manufactured separately and assembled together with regard to the communication device design, frequency requirements etc.; for example, the location of the connector clips can be varied to obtain required antenna features, the form of the antenna element can be varied for obtaining single or multi-band characteristics while same ground plate is used and so on.
- the antenna arrangement according to the present invention can be used in any suitable communications device, such as cellular phones, bluetooth devices etc.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU58992/01A AU5899201A (en) | 2000-05-15 | 2001-05-14 | Antenna arrangement |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20432500P | 2000-05-15 | 2000-05-15 | |
SE0001811A SE0001811D0 (en) | 2000-05-15 | 2000-05-15 | Antenna arrangement |
US60/204,325 | 2000-05-15 | ||
SE0001811-9 | 2000-05-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001089031A1 true WO2001089031A1 (en) | 2001-11-22 |
WO2001089031A8 WO2001089031A8 (en) | 2002-02-28 |
Family
ID=26655109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2001/001078 WO2001089031A1 (en) | 2000-05-15 | 2001-05-15 | Antenna arrangement |
Country Status (2)
Country | Link |
---|---|
AU (1) | AU5899201A (en) |
WO (1) | WO2001089031A1 (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1401050A1 (en) * | 2002-09-19 | 2004-03-24 | Filtronic LK Oy | Internal antenna |
WO2005008835A1 (en) * | 2003-07-22 | 2005-01-27 | Psion Teklogix Inc. | Internal antenna with slots |
FR2884972A1 (en) * | 2005-04-21 | 2006-10-27 | Valeo Securite Habitacle Sas | Carrier identification badge for automatic locking/unlocking of vehicle, has antenna formed at interior of case in which printed circuit is assembled, where air space between circuit and antenna has specific thickness |
WO2006114477A1 (en) * | 2005-04-28 | 2006-11-02 | Pulse Finland Oy | Slot antenna |
US7504997B2 (en) | 2003-02-19 | 2009-03-17 | Fractus, S.A. | Miniature antenna having a volumetric structure |
US7688276B2 (en) | 2001-09-13 | 2010-03-30 | Fractus, S.A. | Multilevel and space-filling ground-planes for miniature and multiband antennas |
US7872605B2 (en) | 2005-03-15 | 2011-01-18 | Fractus, S.A. | Slotted ground-plane used as a slot antenna or used for a PIFA antenna |
US7928915B2 (en) | 2004-09-21 | 2011-04-19 | Fractus, S.A. | Multilevel ground-plane for a mobile device |
US7932863B2 (en) | 2004-12-30 | 2011-04-26 | Fractus, S.A. | Shaped ground plane for radio apparatus |
EP2453522A1 (en) * | 2009-07-07 | 2012-05-16 | Huizhou TCL Mobile Communication Co., Ltd | Mobile communication terminal |
US9761934B2 (en) | 1999-09-20 | 2017-09-12 | Fractus, S.A. | Multilevel antennae |
US9899727B2 (en) | 2006-07-18 | 2018-02-20 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US10355346B2 (en) | 2000-01-19 | 2019-07-16 | Fractus, S.A. | Space-filling miniature antennas |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5262792A (en) * | 1991-09-11 | 1993-11-16 | Harada Kogyo Kabushiki Kaisha | Shortened non-grounded type ultrashort-wave antenna |
US5764190A (en) * | 1996-07-15 | 1998-06-09 | The Hong Kong University Of Science & Technology | Capacitively loaded PIFA |
EP0892459A1 (en) * | 1997-07-08 | 1999-01-20 | Nokia Mobile Phones Ltd. | Double resonance antenna structure for several frequency ranges |
EP1052723A2 (en) * | 1999-05-10 | 2000-11-15 | Nokia Mobile Phones Ltd. | Antenna construction |
-
2001
- 2001-05-14 AU AU58992/01A patent/AU5899201A/en not_active Abandoned
- 2001-05-15 WO PCT/SE2001/001078 patent/WO2001089031A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5262792A (en) * | 1991-09-11 | 1993-11-16 | Harada Kogyo Kabushiki Kaisha | Shortened non-grounded type ultrashort-wave antenna |
US5764190A (en) * | 1996-07-15 | 1998-06-09 | The Hong Kong University Of Science & Technology | Capacitively loaded PIFA |
EP0892459A1 (en) * | 1997-07-08 | 1999-01-20 | Nokia Mobile Phones Ltd. | Double resonance antenna structure for several frequency ranges |
EP1052723A2 (en) * | 1999-05-10 | 2000-11-15 | Nokia Mobile Phones Ltd. | Antenna construction |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10056682B2 (en) | 1999-09-20 | 2018-08-21 | Fractus, S.A. | Multilevel antennae |
US9761934B2 (en) | 1999-09-20 | 2017-09-12 | Fractus, S.A. | Multilevel antennae |
US10355346B2 (en) | 2000-01-19 | 2019-07-16 | Fractus, S.A. | Space-filling miniature antennas |
US7911394B2 (en) | 2001-09-13 | 2011-03-22 | Fractus, S.A. | Multilevel and space-filling ground-planes for miniature and multiband antennas |
US8581785B2 (en) | 2001-09-13 | 2013-11-12 | Fractus, S.A. | Multilevel and space-filling ground-planes for miniature and multiband antennas |
US7688276B2 (en) | 2001-09-13 | 2010-03-30 | Fractus, S.A. | Multilevel and space-filling ground-planes for miniature and multiband antennas |
US6985108B2 (en) * | 2002-09-19 | 2006-01-10 | Filtronic Lk Oy | Internal antenna |
EP1401050A1 (en) * | 2002-09-19 | 2004-03-24 | Filtronic LK Oy | Internal antenna |
US8149171B2 (en) | 2003-02-19 | 2012-04-03 | Fractus, S.A. | Miniature antenna having a volumetric structure |
US8593349B2 (en) | 2003-02-19 | 2013-11-26 | Fractus, S.A. | Miniature antenna having a volumetric structure |
US7504997B2 (en) | 2003-02-19 | 2009-03-17 | Fractus, S.A. | Miniature antenna having a volumetric structure |
EP2273615A1 (en) * | 2003-07-22 | 2011-01-12 | Psion Teklogix Inc. | Internal antenna with slots |
WO2005008835A1 (en) * | 2003-07-22 | 2005-01-27 | Psion Teklogix Inc. | Internal antenna with slots |
US7050009B2 (en) | 2003-07-22 | 2006-05-23 | Psion Teklogix Inc. | Internal antenna |
US7928915B2 (en) | 2004-09-21 | 2011-04-19 | Fractus, S.A. | Multilevel ground-plane for a mobile device |
US7932863B2 (en) | 2004-12-30 | 2011-04-26 | Fractus, S.A. | Shaped ground plane for radio apparatus |
US8593360B2 (en) | 2005-03-15 | 2013-11-26 | Fractus, S.A. | Slotted ground-plane used as a slot antenna or used for a PIFA antenna |
US7872605B2 (en) | 2005-03-15 | 2011-01-18 | Fractus, S.A. | Slotted ground-plane used as a slot antenna or used for a PIFA antenna |
US8111199B2 (en) | 2005-03-15 | 2012-02-07 | Fractus, S.A. | Slotted ground-plane used as a slot antenna or used for a PIFA antenna |
FR2884972A1 (en) * | 2005-04-21 | 2006-10-27 | Valeo Securite Habitacle Sas | Carrier identification badge for automatic locking/unlocking of vehicle, has antenna formed at interior of case in which printed circuit is assembled, where air space between circuit and antenna has specific thickness |
WO2006114477A1 (en) * | 2005-04-28 | 2006-11-02 | Pulse Finland Oy | Slot antenna |
US9899727B2 (en) | 2006-07-18 | 2018-02-20 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US10644380B2 (en) | 2006-07-18 | 2020-05-05 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US11031677B2 (en) | 2006-07-18 | 2021-06-08 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US11349200B2 (en) | 2006-07-18 | 2022-05-31 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
US11735810B2 (en) | 2006-07-18 | 2023-08-22 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
EP2453522A4 (en) * | 2009-07-07 | 2014-05-21 | Huizhou Tcl Mobile Comm Co Ltd | Mobile communication terminal |
EP2453522A1 (en) * | 2009-07-07 | 2012-05-16 | Huizhou TCL Mobile Communication Co., Ltd | Mobile communication terminal |
Also Published As
Publication number | Publication date |
---|---|
WO2001089031A8 (en) | 2002-02-28 |
AU5899201A (en) | 2001-11-26 |
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