EP1672733A1 - Patchantenne - Google Patents

Patchantenne Download PDF

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Publication number
EP1672733A1
EP1672733A1 EP04029526A EP04029526A EP1672733A1 EP 1672733 A1 EP1672733 A1 EP 1672733A1 EP 04029526 A EP04029526 A EP 04029526A EP 04029526 A EP04029526 A EP 04029526A EP 1672733 A1 EP1672733 A1 EP 1672733A1
Authority
EP
European Patent Office
Prior art keywords
antenna
antenna arrangement
gap
patch
patches
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.)
Withdrawn
Application number
EP04029526A
Other languages
English (en)
French (fr)
Inventor
Zhinong Ying
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.)
Sony Mobile Communications AB
Original Assignee
Sony Ericsson Mobile Communications AB
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 Sony Ericsson Mobile Communications AB filed Critical Sony Ericsson Mobile Communications AB
Priority to EP04029526A priority Critical patent/EP1672733A1/de
Publication of EP1672733A1 publication Critical patent/EP1672733A1/de
Withdrawn legal-status Critical Current

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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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/005—Patch antenna using one or more coplanar parasitic elements
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • 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
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H01Q5/392—Combination of fed elements with parasitic elements the parasitic elements having dual-band or multi-band characteristics
    • 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

Definitions

  • the present invention relates to the field of antennas and more particularly to a PIFA antenna arrangement for a portable communication device as well as a portable communication device including such an antenna arrangement.
  • PIFAs are one of the most promising designs as regards compact antennas, they are often provided in mobile phones. See for instance K. Qassim, "Inverted F-antenna for portable handsets", IEEE Colloqium on Microwave Filters and Antennas for Personal Communication Systems, pp. 3/1-3/6, Feb. 1994, London, UK.
  • a PIFA is described that is compact and suitable for use in portable phones.
  • the PIFA comprises capacitve load to provide a yet smaller design, which unfortunately at the same time reduces the bandwidth of the antenna.
  • the present invention is directed towards solving the problem of providing a PIFA antenna arrangement that is very compact, i. e. more compact than a conventional PIFA and at the same time provide broad band capability.
  • An object of the present invention is thus to provide a PIFA antenna arrangement solving the problem(s) stated above.
  • a PIFA antenna arrangement comprising:
  • gap is meant a space where no conducting elements are placed.
  • a second aspect of the present invention is directed towards an antenna arrangement including the features of the first aspect, wherein also the first gap comprises dielectric or forming material.
  • a third aspect of the present invention is directed towards an antenna arrangement including the features of the first, second, third or fourth aspect, wherein the patches have a length approximately equal to a quarter of a wavelength at the operating frequency band.
  • a fourth aspect of the present invention is directed towards an antenna arrangement including the features of the first, second, or third aspect, wherein the connection between the feeding potential, provided by a radio circuit (source) and lower patch is screened.
  • a fifth aspect of the present invention is directed towards an antenna arrangement including the features of the first, second, third, or fourth, aspect, wherein the radio circuit is connected to the second patch at an edge thereof.
  • a sixth aspect of the present invention is directed towards an antenna arrangement including the features of any one of the preceding aspects, wherein at least one of the antenna patches has a slot shape.
  • a seventh aspect of the present invention is directed towards an antenna arrangement including the features of any one of the preceding aspects, wherein at least one of the antenna patches has a branch shape.
  • Another object of the present invention is directed towards providing a portable communication device including an antenna arrangement.
  • a portable communication device comprising a chassis having a microphone, a speaker opening, and a keypad, wherein the device further comprises a PIFA antenna arrangement, said antenna arrangement comprising:
  • the invention has the following advantages:
  • the antenna arrangement is very compact, in particular very thin and has broad-band capability, whereby much wider bandwidth can be achieved by using the same volume as prior art antennas. It is cheap and easy to implement in a portable communication device.
  • Fig. 1 schematically shows a perspective view of the antenna arrangement according to a first embodiment of the invention.
  • the antenna arrangement 10 includes a first upper L-shaped antenna patch 12 herein in the form of a conducting layer, to be connected to ground potential V1, and a second lower L-shaped transmission antenna patch 14, herein in the form of a conducting layer, to be connected to a feeding potential V2.
  • the antenna patches 12, 14 can be made of any suitable material, such as metal, polymer material or the like.
  • FIG. 2 illustrating a view from the side of the antenna arrangment illustrated in Fig. 1.
  • the antenna patches 12, 14 are arranged adjacent to each other and separated by a first gap 17a forming a capacitance like structure to provide a frequency dependent capacitive feeding, i. e. a variable capacitance, being variable due to the gap between antenna patches.
  • the second lower antenna patch 14 is separated by a second gap 17b to the ground plane 15, which second gap 17b comprises dielectric material.
  • the dielectric material is provided as load of dielectric block.
  • both gaps 17a, b could be dielectric block filled.
  • the gap size(s) depend(s) on the coupling between the upper antenna patch 12 and the lower antenna patch 14.
  • the size of the dielectrics 17a and 17b are merely schematic illustrated in the drawing figures and can be any suitable depending on design parameters. Thus, the sizes illustrated in Fig. 1 and 2 are not limiting the scope of the invention in any sense to these particular.
  • the patches have the form of L-shaped conducting layers stacked onto each other in a capacitor like structure.
  • the short between the upper patch 12 and ground can be formed, for instance by threading conducting fabric through a slot 19.
  • dielectric or forming (electret) material can therefore be placed here.
  • Materials to be employed as dielectric materials in the gap should preferably have low dielectric constants (such materials are dependent on the frequency at "high” frequencies, but normally not at “low” frequencies). Normally, in application within the field of the present invention, frequencies are high.
  • materials are for instance: polytetrafluorethylene (PTFE) or low-density polyethylene (LDPE).
  • An insulated conductor 18, connecting to a radio circuit or other source (not shown) is connected to the lower patch 14.
  • the conductor 18 can for instance be a conventional coaxial cable, whereby for instance a centre conductor of the same is connected to the lower patch 14, typically at an edge of the first patch 12, for instance by soldering or other suitable conventional fastening method.
  • the patches can have different area.
  • the antenna arrangement can also be capable of being tuned to different frequencies, for instance to be able also to operate in multiple frequency bands.
  • a first band may be a GSM band and the second band a DCS band.
  • other combinations of frequency bands may be implemented without departing from the invention. Examples are: GSM+PCS, GSM+WCDMA etc.
  • the patches has a length approximately equal to, or approaching a quarter wavelength at the operating frequency band (e.g. around 450 MHz for a cellular phone). It can also be equal to the full wavelength or any suitable multi-band quarter wavelength resonant.
  • the physical form of the patches can be any suitable, for instance planar layers, curved surfaces etc provided that they can be arranged in a capacitor-like fashion.
  • the patches can for instance be slot or branch shaped.
  • the gaps are dimensioned such that its length and impedance allow the antenna arrangement to be fed with an intended radio frequency bandwidth to stay within limits for broad-band performance and the antenna arrangement to work well. Radiation characteristics, drive point impedance and simple construction are parameters that typically have to be considered. However, since they are well-known for a person skilled in the art to design, they will not be further discussed herein.
  • the first gap 17a is about 0,1 to 0,3 percent of the wavelength. However, this is not necessary, since it depends on the dielectric block. Thus, any suitable gap could be provided.
  • the resonant frequencies f0 and bandwidth of the built-in antenna arrangement according to the present invention are dependent upon thickness of the dielectric material, but also the type of dielectric material (j. e. the dielectric constant) will influence.
  • the antenna is easily driven in many frequency bands, for instance GSM/900/1800, PCS 1900, UMTS bands and even GPS bands.
  • the different frequency bands are easily provided by the radio circuits including components such as tuning filter or a tuning network in order to comply with the different frequency bands.
  • the present invention has many advantages.
  • the frequency dependent capacitance feeding realised by two patches coupled to each other, provides two resonances adjacent to each other. In this way the bandwidth is doubled compared to a conventional PIFA.
  • the antenna arrangement provides better wideband performance because of the capacitive feeding compared to conventional PIFAs.
  • the antenna arrangement finds application in a portable communication device such as a mobile phone, which is a preferred embodiment of the invention.
  • the portable communication device can be other types of portable communication devices though, like a cordless phone, a communication module, a PDA or any other type of portable device communicating with radio waves. Most likely, there will be a number of varying portable communication devices in the future when the 3rd generation cellular systems are implemented. Therefore, preferably, the portable communication device according to the present invention, provides adequate gain and bandwidth in all existing present and future frequency bands, typically within a range of 300-3000 MHz.
  • the portable communication device herein a mobile phone, illustrated in Fig. 3 comprises a built-in antenna arrangement according to the present invention.
  • the mobile phone 200 includes a chassis 210 having a microphone opening 220 and speaker opening 230 located approximately next to the position of the mouth and ear, respectively of a user.
  • a keypad 240 allows the user to interact with the communication device, e. g. by inputting a telephone number to be dialed.
  • the mobile phone 200 also includes a built-in antenna, the details of which have been described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Waveguide Aerials (AREA)
  • Support Of Aerials (AREA)
EP04029526A 2004-12-14 2004-12-14 Patchantenne Withdrawn EP1672733A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04029526A EP1672733A1 (de) 2004-12-14 2004-12-14 Patchantenne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04029526A EP1672733A1 (de) 2004-12-14 2004-12-14 Patchantenne

Publications (1)

Publication Number Publication Date
EP1672733A1 true EP1672733A1 (de) 2006-06-21

Family

ID=34927757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04029526A Withdrawn EP1672733A1 (de) 2004-12-14 2004-12-14 Patchantenne

Country Status (1)

Country Link
EP (1) EP1672733A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9130267B2 (en) 2007-03-30 2015-09-08 Fractus, S.A. Wireless device including a multiband antenna system
US9960478B2 (en) 2014-07-24 2018-05-01 Fractus Antennas, S.L. Slim booster bars for electronic devices
CN114497992A (zh) * 2020-11-12 2022-05-13 启碁科技股份有限公司 天线结构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030098812A1 (en) * 2001-11-26 2003-05-29 Zhinong Ying Compact broadband antenna
EP1351334A1 (de) * 2002-04-05 2003-10-08 Hewlett-Packard Company Integrierte Multibandantenne mit kapazitiver Einspeisung
US20040108957A1 (en) * 2002-12-06 2004-06-10 Naoko Umehara Pattern antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030098812A1 (en) * 2001-11-26 2003-05-29 Zhinong Ying Compact broadband antenna
EP1351334A1 (de) * 2002-04-05 2003-10-08 Hewlett-Packard Company Integrierte Multibandantenne mit kapazitiver Einspeisung
US20040108957A1 (en) * 2002-12-06 2004-06-10 Naoko Umehara Pattern antenna

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9130267B2 (en) 2007-03-30 2015-09-08 Fractus, S.A. Wireless device including a multiband antenna system
US10476134B2 (en) 2007-03-30 2019-11-12 Fractus, S.A. Wireless device including a multiband antenna system
US11145955B2 (en) 2007-03-30 2021-10-12 Ignion, S.L. Wireless device including a multiband antenna system
US9960478B2 (en) 2014-07-24 2018-05-01 Fractus Antennas, S.L. Slim booster bars for electronic devices
US10236561B2 (en) 2014-07-24 2019-03-19 Fractus Antennas, S.L. Slim booster bars for electronic devices
US11349195B2 (en) 2014-07-24 2022-05-31 Ignion, S.L. Slim booster bars for electronic devices
CN114497992A (zh) * 2020-11-12 2022-05-13 启碁科技股份有限公司 天线结构
CN114497992B (zh) * 2020-11-12 2024-04-16 启碁科技股份有限公司 天线结构

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