EP2113965A1 - Dual feed multiband antenna and a portable radio communication device comprising such an antenna - Google Patents
Dual feed multiband antenna and a portable radio communication device comprising such an antenna Download PDFInfo
- Publication number
- EP2113965A1 EP2113965A1 EP08155275A EP08155275A EP2113965A1 EP 2113965 A1 EP2113965 A1 EP 2113965A1 EP 08155275 A EP08155275 A EP 08155275A EP 08155275 A EP08155275 A EP 08155275A EP 2113965 A1 EP2113965 A1 EP 2113965A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency band
- radiating element
- antenna device
- filter
- antenna
- 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- Withdrawn
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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
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength
-
- 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
- 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
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
-
- 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 generally to antennas, and particularly to antenna devices for portable radio communication devices.
- An object of the present invention is thus to provide an antenna device which can have reduced size or improved performance compared to known solutions, for a portable radio communication device.
- an antenna device for a portable radio communication device, comprising a first radiating element having a first feed portion, a second radiating element having a second feed portion, a first filter and a second filter, wherein the first and second radiating elements are interconnected through the first filter, the first radiating element is configured to be tuned to a first frequency band, and the second radiating element is configured to be tuned to a second frequency band, wherein the first radiating element is configured to be fed by at least the first frequency band and a third frequency band lower than the first frequency band and the second frequency band through the first feed portion, the second radiating element is configured to be fed by the second frequency band through the second filter, the first filter is configured to block the first and second frequency bands and pass the third frequency band, and the second filter is configured to block the third frequency band and pass the second frequency band, reduced size can be achieved compared to known antenna devices since the highest frequency band utilizes the antenna volume more efficiently.
- the first or second radiating element advantageously has a ground portion for grounding the antenna device.
- the first feed portion is preferably arranged at the first radiating element facing away from the second radiating element and/or the second feed portion is preferably arranged at the second radiating element facing away from the first radiating element.
- the antenna device for a portable radio communication device such as a mobile phone, a PDA, a portable computer and similar devices, comprises a first radiating element 1 having a first feed portion 5, a second radiating element 2 having a second feed portion 6, a first filter 3, which preferably is a low pass filter 3, and a second filter 4, which preferably is a high pass filter 4.
- the first radiating element 1 and the second radiating element 2 are connected through the low pass filter 3.
- the first radiating element 1 is configured to be tuned to a first frequency band and the second radiating element 2 is configured to be tuned to a second frequency band, preferably in the same range or higher than the first frequency band.
- the low pass filter 3 connects the first radiating element 1 and the second radiating element 2, wherein the position of the low pass filter 3 between the radiating elements 1 and 2 is a part of the specific antenna design and may thus vary.
- the first radiating element 1 is configured to be fed by the first frequency band and a third frequency band lower than the first frequency band and the second frequency band. Preferably both the first and third frequency bands are fed through the first feed portion 5. Alternatively, the first radiating element 1 is provided with a third feed portion, and the first and third frequency bands are fed through the first and third feed portions, respectively. The first radiating element 1, the second radiating element 2 and the low pass filter 3 together are configured to be tuned to the third frequency band.
- the second radiating element 2 is configured to be fed by the second frequency band.
- the second frequency band is fed through the high pass filter 4, which is configured to block at least the third frequency band and pass the second frequency band.
- the high pass filter 4 could further be configured to also block the first frequency band, although is should be sufficiently blocked by the low pass filter 3 as described below.
- the low pass filter 3 is configured to block the first and second frequency bands and to pass the third frequency band.
- the high pass filter 4 and the low pass filter 3 are preferably provided by lumped components, since it provides a high degree of design freedom.
- the filters 3 and 4 are provided by e.g. distributed components that are implemented in the pattern of the antenna elements 1 and/or 2.
- a filter component e.g. ceramic or LTCC
- the antenna device is preferably provided with a grounding portion 8 for the first radiating element 1, when the antenna device is arranged over ground or near ground, in order to ground the antenna device.
- the radiating elements 1 and 2 are depicted as patches. However, the radiating elements 1 and 2 can also be made like e.g. off-ground antennas (monopole or IFA).
- the antenna device can also be provided with parasitic radiators to boost performance in one band, having no galvanic connection to the radiating elements 1 and 2 themselves.
- filters have been described above as low pass filter and high pass filter, respectively, they could alternatively be e.g. bandpass or bandstop filters.
- At least the third frequency band is preferably distinct apart from the first and second frequency bands, for relevant separation of the two radiating elements, to allow use of simple filters. Also the first and second frequency bands are preferably distinct apart.
- Tri-band GSM comprises GSM900, 1800 and 1900, which would be fed through the first feed portion 5 to the first radiating element 1.
- WCDMA2100 would be fed through the high pass filter 4 and the second feed portion 6 to the second radiating element 2.
- the first filter 3 is configured to pass frequencies below 1400 MHz and block frequencies there above.
- the second filter 4 is configured to pass signals over 1900 MHz and block frequencies there below.
- the first radiating element 1 is configured for passing S 11 requirements for GSM1800 and 1900.
- the second radiating element 2 is configured for passing S 11 requirements for
- the first and second radiating elements 1 and 2 are together configured to pass S 11 requirements for GSM900.
- GSM comprises Rx and TX frequency bands.
- GSM 900 Rx and Tx, GSM1800 RX and Tx, as well as GSM1900 Rx and Tx would be fed through the first feed portion 5 to the first radiating element 1.
- GSM1800 Rx and GSM1900 Rx would be fed through the high pass filter 4 and the second feed portion 6 to the second radiating element 2.
- the first filter 3 is configured to pass frequencies below 1400 MHz and block frequencies there above.
- the second filter 4 is configured to pass frequencies above 1400 MHz and block frequencies there below.
- the first radiating element 1 is configured for passing S 11 requirements for GSM1800 and GSM1900.
- the second radiating element 2 is configured for passing S 11 requirements for GSM1800 Rx and GSM1900 Rx.
- the first and second radiating elements 1 and 2 are together configured to pass S 11 requirements for GSM900.
- FIG. 2 An antenna device according to a second embodiment of the present invention will now be described with reference to Fig. 2 .
- This second embodiment is identical to the first embodiment described above apart from the following.
- a grounding portion 9 is arranged on the second radiating element 2 instead of on the first radiating element 1, which provides for a different functionality of the antennas according to the first and second embodiments, especially in the third frequency band.
- the grounding portion 9 is preferably positioned less than 10 mm from the high pass filter 4, more preferably less than 5 mm, and most preferably less than 2 mm.
- the grounding portion 9 can alternatively be arranged on the first radiating element 1, or not used at all, as in the first embodiment described above.
- a third filter 10 is provided between the first and second radiating elements 1 and 2.
- the use of a third filter 10 allows greater flexibility in design of the desired filter functions.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Waveguide Aerials (AREA)
Abstract
Description
- The present invention relates generally to antennas, and particularly to antenna devices for portable radio communication devices.
- The market for portable radio communication devices, such as mobile phones, PDA, portable computers and similar devices, is today very competitive, which puts tough demands on the manufacturers. Furthermore, antennas of such devices many times only have access to limited space of different shapes.
- An object of the present invention is thus to provide an antenna device which can have reduced size or improved performance compared to known solutions, for a portable radio communication device.
- This object, among others, is according to the present invention attained by an antenna device and a portable radio communication device, respectively, as defined by the appended claims.
- By providing an antenna device, for a portable radio communication device, comprising a first radiating element having a first feed portion, a second radiating element having a second feed portion, a first filter and a second filter, wherein the first and second radiating elements are interconnected through the first filter, the first radiating element is configured to be tuned to a first frequency band, and the second radiating element is configured to be tuned to a second frequency band, wherein the first radiating element is configured to be fed by at least the first frequency band and a third frequency band lower than the first frequency band and the second frequency band through the first feed portion, the second radiating element is configured to be fed by the second frequency band through the second filter, the first filter is configured to block the first and second frequency bands and pass the third frequency band, and the second filter is configured to block the third frequency band and pass the second frequency band, reduced size can be achieved compared to known antenna devices since the highest frequency band utilizes the antenna volume more efficiently.
- By preferably providing the antenna device over ground or close to ground the first or second radiating element advantageously has a ground portion for grounding the antenna device.
- To improve isolation between the radiating elements the first feed portion is preferably arranged at the first radiating element facing away from the second radiating element and/or the second feed portion is preferably arranged at the second radiating element facing away from the first radiating element.
- Further features and advantages of the present invention will be evident from the following description.
- The present invention will become more fully understood from the detailed description of embodiments given below and the accompanying figure, which is given by way of illustration only, and thus, is not limitative of the present invention, wherein:
-
Fig. 1 schematically illustrates an antenna device according to a first embodiment of the present invention. -
Fig. 2 schematically illustrates an antenna device according to a second embodiment of the present invention. -
Fig. 3 schematically illustrates an antenna device according to a third embodiment of the present invention. - In the following description, for purpose of explanation and not limitation, specific details are set forth, such as particular techniques and applications in order to provide a thorough understanding of the present invention. However, it will be apparent for a person skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed description of well-known methods and apparatuses are omitted so as not to obscure the description of the present invention with unnecessary details.
- An antenna device according to a first embodiment of the present invention will now be described with reference to
Fig. 1 . - The antenna device for a portable radio communication device, such as a mobile phone, a PDA, a portable computer and similar devices, comprises a first radiating
element 1 having afirst feed portion 5, a secondradiating element 2 having a second feed portion 6, afirst filter 3, which preferably is alow pass filter 3, and asecond filter 4, which preferably is ahigh pass filter 4. The firstradiating element 1 and the secondradiating element 2 are connected through thelow pass filter 3. The first radiatingelement 1 is configured to be tuned to a first frequency band and the second radiatingelement 2 is configured to be tuned to a second frequency band, preferably in the same range or higher than the first frequency band. Thelow pass filter 3 connects the firstradiating element 1 and the secondradiating element 2, wherein the position of thelow pass filter 3 between theradiating elements - The first radiating
element 1 is configured to be fed by the first frequency band and a third frequency band lower than the first frequency band and the second frequency band. Preferably both the first and third frequency bands are fed through thefirst feed portion 5. Alternatively, the firstradiating element 1 is provided with a third feed portion, and the first and third frequency bands are fed through the first and third feed portions, respectively. The firstradiating element 1, the secondradiating element 2 and thelow pass filter 3 together are configured to be tuned to the third frequency band. - The second radiating
element 2 is configured to be fed by the second frequency band. The second frequency band is fed through thehigh pass filter 4, which is configured to block at least the third frequency band and pass the second frequency band. Thehigh pass filter 4 could further be configured to also block the first frequency band, although is should be sufficiently blocked by thelow pass filter 3 as described below. - The
low pass filter 3 is configured to block the first and second frequency bands and to pass the third frequency band. Thehigh pass filter 4 and thelow pass filter 3 are preferably provided by lumped components, since it provides a high degree of design freedom. Alternatively, thefilters antenna elements 1 and/or 2. Also, a filter component (e.g. ceramic or LTCC) can be used directly to provide desired filtering. - The antenna device is preferably provided with a
grounding portion 8 for the firstradiating element 1, when the antenna device is arranged over ground or near ground, in order to ground the antenna device. - The
radiating elements radiating elements radiating elements - Although the filters have been described above as low pass filter and high pass filter, respectively, they could alternatively be e.g. bandpass or bandstop filters.
- At least the third frequency band is preferably distinct apart from the first and second frequency bands, for relevant separation of the two radiating elements, to allow use of simple filters. Also the first and second frequency bands are preferably distinct apart.
- For an antenna device arranged to provide e.g. tri-band GSM and WCDMA the configuration would be as follows.
- Tri-band GSM comprises GSM900, 1800 and 1900, which would be fed through the
first feed portion 5 to the firstradiating element 1. WCDMA2100 would be fed through thehigh pass filter 4 and the second feed portion 6 to the second radiatingelement 2. Thefirst filter 3 is configured to pass frequencies below 1400 MHz and block frequencies there above. Thesecond filter 4 is configured to pass signals over 1900 MHz and block frequencies there below. The first radiatingelement 1 is configured for passing S11 requirements for GSM1800 and 1900. The second radiatingelement 2 is configured for passing S11 requirements for - WCDMA. The first and second
radiating elements - For an antenna device arranged to provide e.g. GSM900, GSM1800 and GSM1900 with reception diversity for the high bands the configuration would be as follows.
- GSM comprises Rx and TX frequency bands. GSM 900 Rx and Tx, GSM1800 RX and Tx, as well as GSM1900 Rx and Tx would be fed through the
first feed portion 5 to the firstradiating element 1. GSM1800 Rx and GSM1900 Rx would be fed through thehigh pass filter 4 and the second feed portion 6 to the second radiatingelement 2. Thefirst filter 3 is configured to pass frequencies below 1400 MHz and block frequencies there above. Thesecond filter 4 is configured to pass frequencies above 1400 MHz and block frequencies there below. The first radiatingelement 1 is configured for passing S11 requirements for GSM1800 and GSM1900. The second radiatingelement 2 is configured for passing S11 requirements for GSM1800 Rx and GSM1900 Rx. The first and secondradiating elements - An antenna device according to a second embodiment of the present invention will now be described with reference to
Fig. 2 . This second embodiment is identical to the first embodiment described above apart from the following. - A
grounding portion 9 is arranged on the second radiatingelement 2 instead of on the firstradiating element 1, which provides for a different functionality of the antennas according to the first and second embodiments, especially in the third frequency band. By arranging thegrounding portion 9 on thesecond radiating element 2, preferably close to thehigh pass filter 4, implementation of thehigh pass filter 4 is facilitated, since the impedance of the radiating element will be low close to thegrounding portion 9, which in turn implies that the third frequency band attains a half-wave structure (such as a loop structure). In connection herewith the groundingportion 9 is preferably positioned less than 10 mm from thehigh pass filter 4, more preferably less than 5 mm, and most preferably less than 2 mm. - The grounding
portion 9 can alternatively be arranged on thefirst radiating element 1, or not used at all, as in the first embodiment described above. - An antenna device according to a third embodiment of the present invention will now be described with reference to
Fig. 3 . This third embodiment is identical to the second embodiment described above apart from the following. - A
third filter 10 is provided between the first andsecond radiating elements third filter 10 allows greater flexibility in design of the desired filter functions. - It will be obvious that the present invention may be varied in a plurality of ways. Such variations are not to be regarded as departure from the scope of the present invention as defined by the appended claims. All such variations as would be obvious for a person skilled in the art are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (13)
- An antenna device for a portable radio communication device, comprising a first radiating element (1) having a first feed portion (5), a second radiating element (2) having a second feed portion (6), a first filter (3) and a second filter (4), characterized in that said first and second radiating elements (1, 2) are interconnected through said first filter (3), said first radiating element (1) is configured to be tuned to a first frequency band, and said second radiating element (2) is configured to be tuned to a second frequency band, wherein said first radiating element (1) is configured to be fed by at least said first frequency band and a third frequency band lower than said first frequency band and said second frequency band, said second radiating element (2) is configured to be fed by said second frequency band through said second filter (4), said first filter (3) is configured to block said first and second frequency bands and pass said third frequency band, and said second filter (4) is configured to block said third frequency band and pass said second frequency band.
- The antenna device as claimed in claim 1, wherein said first radiating element (1) has a ground portion (8) for grounding said antenna device.
- The antenna device as claimed in claim 1 or 2, wherein said second radiating element (2) has a ground portion (9) for grounding said antenna device.
- The antenna device as claimed in claim 3, wherein said ground portion (9) on said second radiating element (2) is arranged close to said second feeding portion (6).
- The antenna device as claimed in any of claims 1-4, wherein said first feed portion (5) is arranged at said first radiating element (1) facing away from said second radiating element (2).
- The antenna device as claimed in any of claims 1-5, wherein said second feed portion (6) is arranged at said second radiating element (2) facing away from said first radiating element (1).
- The antenna device as claimed in any of claims 1-6, wherein said first radiating element (1), said second radiating element (2) and said first filter (3) together are configured to be tuned to said third frequency band.
- The antenna device as claimed in any of claims 1-7, wherein said first frequency band and said third frequency band are fed through said first feed portion (5).
- The antenna device as claimed in any of claims 1-8, wherein said first radiating element (1) has a third feed portion, wherein said first frequency band is fed through said first feed portion (5) and said third frequency band is fed through said third feed portion.
- The antenna device as claimed in any of claims 1-9, wherein said second frequency band is higher than said first frequency band.
- The antenna device as claimed in any of claims 1-10, wherein said first and second frequency bands are distinct apart.
- The antenna device as claimed in any of claims 1-11, wherein said first and third frequency bands are distinct apart.
- A portable radio communication device characterized in that is comprises an antenna device as claimed in any of claims 1-12.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08155275A EP2113965A1 (en) | 2008-04-28 | 2008-04-28 | Dual feed multiband antenna and a portable radio communication device comprising such an antenna |
PCT/SE2009/050431 WO2009134198A1 (en) | 2008-04-28 | 2009-04-24 | An antenna device and a portable radio communication device comprising such an antenna device |
CN2009801151523A CN102017291B (en) | 2008-04-28 | 2009-04-24 | An antenna device and a portable radio communication device comprising such an antenna device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08155275A EP2113965A1 (en) | 2008-04-28 | 2008-04-28 | Dual feed multiband antenna and a portable radio communication device comprising such an antenna |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2113965A1 true EP2113965A1 (en) | 2009-11-04 |
Family
ID=39832632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08155275A Withdrawn EP2113965A1 (en) | 2008-04-28 | 2008-04-28 | Dual feed multiband antenna and a portable radio communication device comprising such an antenna |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2113965A1 (en) |
CN (1) | CN102017291B (en) |
WO (1) | WO2009134198A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022046028A1 (en) * | 2020-08-25 | 2022-03-03 | Hewlett-Packard Development Company, L.P. | Multi-band antennas |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102215658B1 (en) * | 2019-10-11 | 2021-02-15 | (주)휴맥스 | Integrated antenna module and smart antenna devicee for vehicle comprising the same |
KR102215657B1 (en) * | 2019-10-11 | 2021-02-15 | (주)휴맥스 | Multi-band antenna and antenna assembly comprising the same for vehicle |
CN111106452A (en) * | 2019-12-13 | 2020-05-05 | 惠州Tcl移动通信有限公司 | Antenna array, FPC and electronic equipment |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61265905A (en) | 1985-05-20 | 1986-11-25 | Toyo Commun Equip Co Ltd | Two-frequency shared antenna |
JPH10247814A (en) | 1997-03-05 | 1998-09-14 | Mitsubishi Electric Corp | Three-frequency sharing antenna device |
JPH11251825A (en) | 1998-03-03 | 1999-09-17 | Kenwood Corp | Multi-ple frequency resonance-type inverted f-type antenna |
US20060262028A1 (en) | 2002-10-15 | 2006-11-23 | Ken Takei | Small multi-mode antenna and rf module using the same |
EP1764866A1 (en) * | 2005-09-15 | 2007-03-21 | Infineon Tehnologies AG | Miniaturized integrated monopole antenna |
US20080174508A1 (en) * | 2007-01-19 | 2008-07-24 | Hiroshi Iwai | Array antenna apparatus having at least two feeding elements and operable in multiple frequency bands |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6078295A (en) * | 1999-02-24 | 2000-06-20 | Ericsson Inc. | Tri-band antenna |
JP2002246942A (en) * | 2001-02-19 | 2002-08-30 | Sony Corp | Switching device and portable communication terminal device |
SE528017C2 (en) * | 2004-02-02 | 2006-08-08 | Amc Centurion Ab | Antenna device and portable radio communication device including such antenna device |
CN1728449A (en) * | 2004-07-29 | 2006-02-01 | 智邦科技股份有限公司 | Antenna |
SE528569C2 (en) * | 2004-09-13 | 2006-12-19 | Amc Centurion Ab | Antenna device and portable radio communication device including such antenna device |
US7277056B1 (en) * | 2006-09-15 | 2007-10-02 | Laird Technologies, Inc. | Stacked patch antennas |
-
2008
- 2008-04-28 EP EP08155275A patent/EP2113965A1/en not_active Withdrawn
-
2009
- 2009-04-24 WO PCT/SE2009/050431 patent/WO2009134198A1/en active Application Filing
- 2009-04-24 CN CN2009801151523A patent/CN102017291B/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61265905A (en) | 1985-05-20 | 1986-11-25 | Toyo Commun Equip Co Ltd | Two-frequency shared antenna |
JPH10247814A (en) | 1997-03-05 | 1998-09-14 | Mitsubishi Electric Corp | Three-frequency sharing antenna device |
JPH11251825A (en) | 1998-03-03 | 1999-09-17 | Kenwood Corp | Multi-ple frequency resonance-type inverted f-type antenna |
US20060262028A1 (en) | 2002-10-15 | 2006-11-23 | Ken Takei | Small multi-mode antenna and rf module using the same |
EP1764866A1 (en) * | 2005-09-15 | 2007-03-21 | Infineon Tehnologies AG | Miniaturized integrated monopole antenna |
US20080174508A1 (en) * | 2007-01-19 | 2008-07-24 | Hiroshi Iwai | Array antenna apparatus having at least two feeding elements and operable in multiple frequency bands |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022046028A1 (en) * | 2020-08-25 | 2022-03-03 | Hewlett-Packard Development Company, L.P. | Multi-band antennas |
Also Published As
Publication number | Publication date |
---|---|
CN102017291A (en) | 2011-04-13 |
WO2009134198A1 (en) | 2009-11-05 |
CN102017291B (en) | 2013-10-09 |
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