CN1739219A - Antenna - Google Patents
Antenna Download PDFInfo
- Publication number
- CN1739219A CN1739219A CN 200480002348 CN200480002348A CN1739219A CN 1739219 A CN1739219 A CN 1739219A CN 200480002348 CN200480002348 CN 200480002348 CN 200480002348 A CN200480002348 A CN 200480002348A CN 1739219 A CN1739219 A CN 1739219A
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- CN
- China
- Prior art keywords
- antenna
- antenna structure
- antenna panel
- feed voltage
- panel
- 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.)
- Pending
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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
- H01Q9/0442—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
- 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
- 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
- H01Q9/0414—Substantially flat resonant element parallel to ground plane, e.g. patch antenna in a stacked or folded configuration
-
- 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
- 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
- H01Q9/0457—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means electromagnetically coupled to the feed line
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Support Of Aerials (AREA)
- Waveguide Aerials (AREA)
- Telephone Set Structure (AREA)
- Transceivers (AREA)
Abstract
Antenna arrangement for a portable communication device, and portable communication device comprising such an antenna arrangement (10) built-in, wherein said antenna arrangement (10) comprises antenna patches (12, 14) separated by a gap (17) comprise capacitance feeding being frequency dependent.
Description
Technical field
The present invention relates to field of antenna, more specifically, relate to the antenna structure and the portable communication device that comprises this built-in antenna arrangement of portable communication device.
Background technology
It is exactly at the inner built-in aerial of installing of equipment self that a kind of trend is arranged in portable communication device field (particularly in field of cellular telephony).Following portable communication device may be little and in light weight with volume.Usually in such equipment, will more need built-in aerial.Nowadays, the built-in aerial of existing portable communication device (for example cell phone) outfit generally has so-called " little band (Microstrostrip) " antenna or so-called " plane inverse F type " antenna (PIFA).
Microstrip antenna has slim body, and size is little and in light weight, but can not provide the application more than a frequency band usually, and so-called " multiband " ability promptly is not provided.Under the situation of microstrip antenna, provide multiple frequency band capabilities by a plurality of strip lines parts (strip line part) of resonance under different frequency, thereby antenna provides the possibility of multiband.In US-A-6 166 694, can find the example of this technology.The printed twin spiral dual band antenna is disclosed in this document.
PIFA has been used to mobile phone and has been one of the most promising design.For example see K.Qassim, " Inverted F-antenna for portable handsets ", IEEEColloqium on MicroWave Filters and Antennas for PersonalCommunication Systems, pp.3/1-3/6, Feb.1994, London, Uk.
In addition, for example see and described crooked inverted F shaped antenna among the WO-A1-96/27 219, compare with traditional PI FA thus and can reduce antenna size.
Yet, along with portable communication device becomes more and more littler, need for example to be used for a plurality of antennas of honeycomb, WLAN (wireless local area network) (LAN), GPS application etc. simultaneously, therefore traditional antenna can not provide enough multiple frequency band capabilities, and not have enough bandwidth and/or excessive and can not be applicable to the little base plate of following portable communication device specifically.
Thereby need a kind of antenna structure that is used for portable communication device, and this antenna structure can provide enough bandwidth, and particularly, this antenna structure should be able to provide broadband ability, and volume is little.
Summary of the invention
The present invention is intended to solve the problem of the antenna structure (built-in antenna arrangement specifically) that provides such, and this antenna structure provides broadband ability simultaneously in light weight and/or size is little.
Similarly, an object of the present invention is to provide the antenna structure that addresses the above problem.Another object of the present invention provides the portable communication device that comprises such antenna structure.
According to a first aspect of the invention, it can realize that this antenna structure comprises by such antenna structure:
First antenna panel that is connected with first feed voltage and
Second antenna panel that is connected with second feed voltage, described antenna panel are comprised the feed electric capacity (capacitance feeding) based on frequency by repacking.
The variable capacitance that provides frequency to rely in this way.It provides much wide bandwidth, generally is the twice with conventional PIFA of same antenna volume.
A second aspect of the present invention is intended to comprise the antenna structure of described first aspect feature, and wherein said flat board is separated by the gap that comprises dielectric material or moulding material (forming material).Because this antenna structure looks like two L, so hereinafter, the antenna structure of different embodiment according to the subject invention also will be called as " PDLA " (the two L antennas in plane).Preferably, described dielectric material has low dielectric constant.
A third aspect of the present invention is intended to comprise described first or the antenna structure of the feature of second aspect, the length in wherein said gap to/from the wavelength in source 0.1～0.3% between.
A fourth aspect of the present invention is intended to comprise the antenna structure of the feature of described first, second or the third aspect, the wherein said second feed voltage ground connection.
A fifth aspect of the present invention is intended to comprise described first, second, third or the antenna structure of the feature of fourth aspect, the length of wherein said flat board be approximately equal to operational frequency bands wavelength 1/4th.
A sixth aspect of the present invention is intended to comprise described first, second, third, fourth or the antenna structure of the feature of the 5th aspect, wherein is connected conductively-closed between described first feed voltage that is provided by radio circuit (source) and described first flat board.
A seventh aspect of the present invention is intended to comprise the antenna structure of the feature of described the first, second, third, fourth, the 5th or the 6th aspect, and wherein said radio circuit is connected at the edge of this first flat board with described first flat board.
Another aspect of the present invention aims to provide the portable communication device that comprises antenna structure.
According to an eighth aspect of the invention, its purpose realizes that by such portable communication device described equipment comprises the base plate with microphone opening, speaker openings and keypad, and wherein equipment also comprises antenna structure, and described antenna structure comprises:
First antenna panel that is connected with first feed voltage and
Second antenna panel that is connected with second feed voltage, described antenna panel are comprised the electric capacity based on the frequency feed by repacking.
The present invention has following advantage: this antenna equipment has broadband ability, thereby by using the volume identical with the antenna of prior art can realize wideer bandwidth.This cheap and in portable communication device, realizing easily.And, because the built-in antenna arrangement size is little, so its needed PCB space is minimized.
Should emphasize,, also not get rid of existence or additional one or more further features, integral body, step, part or their combination though term " comprises " existence that is used to refer in particular to described feature, integral body, step or parts in the explanation of this paper.
Description of drawings
To illustrate in greater detail the present invention in conjunction with the accompanying drawings now.
Fig. 1 schematically shows the perspective view according to the first embodiment of the present invention.
Fig. 2 shows the sectional view of antenna element shown in Figure 1, and described diagrammatic sketch intercepts along the line A-A among Fig. 1.
Fig. 3 shows the equivalent electric circuit of the antenna structure among Fig. 1-2.
Fig. 4 shows by using the analog result of simulation tool acquisition with the form of frequency curve.
Fig. 5 shows the embodiment of portable communication device, wherein can realize according to antenna structure of the present invention.
Fig. 6 shows the return loss and the Smith chart of antenna structure according to an embodiment of the invention.
Embodiment
As required, specific embodiment of the present invention will be disclosed herein; Yet, should be appreciated that the disclosed embodiments only are examples of the present invention, the present invention can also come specific implementation with modified example outside the embodiment that describes below and replacement form.Accompanying drawing neither inevitable proportional drafting, and in order to show the details of specific components or feature, some elements may be exaggerated or dwindle.Therefore, ad hoc structure disclosed herein and function detail can not be interpreted as restriction in all senses, but as just the basis of claim with make those skilled in the art put into practice representational basis of the present invention with changing.
Fig. 1 schematically shows the perspective view according to the first embodiment of the present invention.Antenna structure 10 comprises and the first feed voltage V
1Be connected, herein for first antenna panel 12 of conductive layer form and with the second feed voltage V
2Be connected, be second antenna panel 14 of conductive layer form, this second feed voltage V herein
2Be ground voltage in this particular example.This second feed voltage V
2Generally be ground connection, but also can be any suitable voltage that comprises negative voltage.
Antenna panel can be made by any suitable material, for example metal, polymeric material etc.
Referring now to Fig. 2, it is the sectional view of Fig. 1, and first dull and stereotyped 12 and second dull and stereotyped 14 is comprised that the gap 17 of dielectric material or moulding material separates, thereby according to the operating frequency of antenna structure, provides the variable capacitance of frequency dependence.Preferably, dull and stereotyped 12,14 is the form of L shaped conductive layer, and they pile up mutually in the mode of similar capacitor.For example, can between second flat board 14 and ground, form short circuit by making conductive structure pass groove 19.To further specify the structure of the antenna structure 10 in portable communication device below; Yet, conspicuous design parameter for those skilled in the art designs will be described, for example apart from enough distances of equipment bay (not shown) and other parameter.
Wherein, term " gap " meaning is the space of not placing conducting element.Therefore can place different dielectric material or moulding (electret) material here.Preferably, should have low dielectric constant (select this material in frequency under for " height " situation frequently, and generally do not select this material under for " low " situation frequently) as the material of the dielectric material in the gap in frequency.Usually, in the application of the field of the invention, frequency is high.The concrete example of material is for example: polytetrafluoroethylene (PTFE) or low density polyethylene (LDPE) (LDPE).
The insulated conductor 18 that is connected to radio circuit or other source (not shown) is connected with first flat board 12.This conductor 18 for example can be conventional coaxial cable, thereby for example its center conductor is connected with first flat board 12, generally for example is connected at the edge of first flat board 12 by welding or other conventional fixing means that is fit to.
Described flat board can have different zones.For example,, also antenna structure can be tuned to different frequency, for example also can under a plurality of frequency bands, work by controlling dull and stereotyped length (or width).For example, first frequency band is a GSM frequency band and second frequency band is the DCS frequency band.Certainly, do not breaking away under the situation of the present invention, also can realize the combination of other frequency band.For example: GSM+PCS, GSM+WCDMA etc.
In a preferred embodiment, flat board has 1/4th the wavelength that is approximately equal to or approaches working band (being about 450MHz for cell phone for example).It is long that it also can equal all-wave.
Dull and stereotyped physical form can be any suitable form, and for example flat layer, curved surface etc. are as long as they can be with the arranged in form of similar capacitor.
Usually, the gross thickness according to antenna structure of the present invention is below the 15mm.Can finish the tuning of antenna structure by the mode of for example mating the bridge (not shown).
Referring now to accompanying drawing 3, it shows the equivalent electric circuit of antenna structure.By equivalent electric circuit 100 this antenna structure can be described, inductance L that wherein is connected in parallel and capacitor C and variable capacitor Cv are connected in series, this variable capacitor Cv has variable electric capacity (pointing out with the arrow that tilts), and it is that frequency relies on, and this is because the gap between the flat board.Conventional PIFA has fixing L and C,, does not have variable capacitor Cv that is, and it is limited therefore working as an antenna volume hour bandwidth.
Usually, the length and the impedance that gap size are defined as it make antenna structure when being supplied to the radio frequency bandwidth of design, remain on the interior and antenna structure operational excellence of restriction of broadband performance.Radiation characteristic, driving point impedance and simple structure generally are the parameters that must consider.Yet because design for those skilled in the art, they are known, so will they be further discussed herein.Preferably, the gap approximately is 0.1～0.3% of a wavelength.
As mentioned above, the thickness that depends on dielectric material according to the resonance frequency f0 and the bandwidth of built-in antenna arrangement of the present invention, and also the type of dielectric material (that is dielectric constant) is also influential.This resonance frequency can be described by known general formula (I):
(I)：
f0＝1/2πLC (I)
By designing this flat board dexterously, can further improve broadband character.For example can provide load resistance with further raising bandwidth.
Because the size of antenna structure of the present invention, can drive this antenna at an easy rate at many frequency bands, for example at GSM/900/1800, PCS1900, UMTS frequency band even GPS frequency band.For with different frequency band compatibilities, can provide different frequency bands easily by the radio circuit of the parts that comprise tuned filter for example or tuning network.
For effect of the present invention is described, Fig. 4 has set forth the analog result of exemplary antenna structure.Fig. 4 shows, compares with conventional PIFA, and bandwidth has increased by 30%.PDLA introduces Cv parts as shown in Figure 3, and these Cv parts allow PDLA to have nearly 50 ohm in the broadband.This is further shown in Fig. 6, has shown the circle around 50 ohm of centers among Fig. 6.In Fig. 6, shown the impedance of the antenna structure of big frequency range.Because Fig. 6 is conventional Smith chart, so will be not described further herein.
The present invention has many advantages.The feed electric capacity that relies on by two dull and stereotyped frequencies that realize that intercouple provides two contiguous mutually resonance.In this way, comparing bandwidth with conventional PIFA is doubled.Because the cause of feed electric capacity, so compare with conventional PIFA, this antenna structure provides better broadband performance.
In Fig. 5, now combined with mobile telephone (it is the preferred embodiments of the present invention) is illustrated according to portable communication device of the present invention.Yet it can be the communication equipment of other type, as cordless telephone, communication module, PDA or utilize the portable communication device of any other type of airwave communication.In future, when having realized third generation cellular system, a lot of portable communication devices that change will appear probably.Therefore, preferably, (generally in the 300-3000MHz scope) provides enough gain and bandwidth in the portable communication device according to the present invention and frequency band in the future existing at all.
Portable communication device (shown in Fig. 5 is mobile phone) comprises according to built-in antenna arrangement of the present invention.This mobile phone 200 comprises base plate 210, and base plate 210 has the microphone opening 220 and the speaker openings 230 of the position that lays respectively at the mouth that approaches the user and ear below.Keypad 240 permission users and communication equipment are mutual, for example the telephone number that will dial by input.Mobile phone 200 also comprises built-in aerial 250, and its detailed content is described in the above.
Described above principle of the present invention, preferred embodiment and mode of operation.Yet the present invention should not be construed to and be confined to specific embodiment discussed above.Therefore, the above embodiments are construed as exemplary rather than restrictive, and should be appreciated that those skilled in the art can make multiple modification to these embodiment in not breaking away from by the appended scope of the present invention that claim limited.
Claims (9)
1, a kind of antenna structure that is configured in the portable communication device, wherein this antenna structure (10) comprising:
With the first feed voltage (V
1) first antenna panel (12) that is connected and with the second feed voltage (V
2) second antenna panel (14) that is connected, this second feed voltage (V
2) earth point preferably, described antenna panel (12,14) is adapted as the feed electric capacity that comprises that frequency relies on.
2, antenna structure according to claim 1, wherein said first and second antenna panel (12,14) are separated by the gap that comprises dielectric material or moulding material (17).
3, antenna structure according to claim 1 and 2, wherein said dielectric material has low dielectric constant.
4, according to any one described antenna structure in the claim 1 to 3, the length of wherein said gap (17) from/to the wavelength of source (S) 0.1～0.3% between.
5, according to any one described antenna structure in the claim 1 to 4, the wherein said second feed voltage (V
2) be earthed voltage.
6, according to any one described antenna structure in the claim 1 to 5, wherein said antenna panel (12,14) has the quarter-wave length that approaches working band.
7, according to the described antenna structure of any one claim of front, the described first feed voltage (V that (S) provides by described radio circuit (source) wherein
1) and described first flat board (12) between connection (18) conductively-closed.
8, according to the described antenna structure of any one claim of front, wherein said radio circuit (S) is connected with described first antenna panel (12) in described first antenna panel (12) edge.
9, a kind of portable communication device, described equipment (200) comprises base plate (210), this base plate (210) has microphone (220), speaker openings (230) and keypad (240), and wherein this equipment (200) also comprises antenna structure (10), and described antenna structure (10) comprising:
With the first feed voltage (V
1) first antenna panel (12) that is connected and with the second feed voltage (V
2) second antenna panel (14) that is connected, described antenna panel (12,14) is adapted as the feed electric capacity that comprises that frequency relies on.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03001011.0 | 2003-01-17 | ||
| EP03001011A EP1443595A1 (en) | 2003-01-17 | 2003-01-17 | Antenna |
| US60/443,365 | 2003-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1739219A true CN1739219A (en) | 2006-02-22 |
Family
ID=32605233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200480002348 Pending CN1739219A (en) | 2003-01-17 | 2004-01-14 | Antenna |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1443595A1 (en) |
| CN (1) | CN1739219A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834344A (en) * | 2010-04-27 | 2010-09-15 | 上海真灼电子技术有限公司 | Radio-frequency identification reader antenna for refrigerator |
| CN103563169A (en) * | 2011-05-19 | 2014-02-05 | 莫列斯公司 | Antenna system |
| CN109478721A (en) * | 2016-06-06 | 2019-03-15 | 索尼移动通讯有限公司 | The C feed antennas being formed on multilayer board edge |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1223637B1 (en) | 1999-09-20 | 2005-03-30 | Fractus, S.A. | Multilevel antennae |
| US8738103B2 (en) | 2006-07-18 | 2014-05-27 | Fractus, S.A. | Multiple-body-configuration multimedia and smartphone multifunction wireless devices |
| GB201122324D0 (en) | 2011-12-23 | 2012-02-01 | Univ Edinburgh | Antenna element & antenna device comprising such elements |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659009B2 (en) * | 1988-03-10 | 1994-08-03 | 株式会社豊田中央研究所 | Mobile antenna |
| US5764190A (en) * | 1996-07-15 | 1998-06-09 | The Hong Kong University Of Science & Technology | Capacitively loaded PIFA |
| FI110395B (en) * | 1997-03-25 | 2003-01-15 | Nokia Corp | Broadband antenna is provided with short-circuited microstrips |
| JP3252786B2 (en) * | 1998-02-24 | 2002-02-04 | 株式会社村田製作所 | Antenna device and wireless device using the same |
-
2003
- 2003-01-17 EP EP03001011A patent/EP1443595A1/en not_active Ceased
-
2004
- 2004-01-14 CN CN 200480002348 patent/CN1739219A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834344A (en) * | 2010-04-27 | 2010-09-15 | 上海真灼电子技术有限公司 | Radio-frequency identification reader antenna for refrigerator |
| CN101834344B (en) * | 2010-04-27 | 2013-09-11 | 上海真灼电子技术有限公司 | Radio-frequency identification reader antenna for refrigerator |
| CN103563169A (en) * | 2011-05-19 | 2014-02-05 | 莫列斯公司 | Antenna system |
| CN103563169B (en) * | 2011-05-19 | 2015-12-23 | 莫列斯公司 | Antenna system |
| CN109478721A (en) * | 2016-06-06 | 2019-03-15 | 索尼移动通讯有限公司 | The C feed antennas being formed on multilayer board edge |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1443595A1 (en) | 2004-08-04 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20060222 |