CN101505000A - Multi-frequency band antenna and wireless communication terminal using the same - Google Patents
Multi-frequency band antenna and wireless communication terminal using the same Download PDFInfo
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- CN101505000A CN101505000A CNA2008100062271A CN200810006227A CN101505000A CN 101505000 A CN101505000 A CN 101505000A CN A2008100062271 A CNA2008100062271 A CN A2008100062271A CN 200810006227 A CN200810006227 A CN 200810006227A CN 101505000 A CN101505000 A CN 101505000A
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- multiband antenna
- radiation fin
- fin unit
- pcb mainboard
- antenna
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Abstract
The invention provides a multiband antenna and a wireless communication terminal using the multiband antenna; the multiband antenna has a monopolar antenna structure similar to a PIFA form and consists of a radiating sheet unit, a power feeding conductor and a PCB mainboard, wherein the radiating sheet unit is rectangular; the upper part of the radiating sheet unit is notched to form a multi-resonant structure; the PCB mainboard comprises a first part which is relatively arranged parallel to the radiation sheet unit and contains no metal layer and a second part which extends out from the first part and contains a metal layer; and the power feeding conductor is connected between the radiating sheet unit and a radio frequency signal feeding point of the PCB mainboard. The multiband antenna has the property of ultra-broadband; as a short-circuit conductor and a parasitic element are not need to mount, the shape structure of the multiband antenna is further simplified; therefore, the multiband antenna is more suitable for being internally mounted in the wireless terminal with small-scale and ultrathin design.
Description
Technical field
The present invention relates to a kind of antenna that is applied to radio communication device, relate in particular to a kind of built-in multiband antenna that is suitable for the radio communication device of miniaturization, ultra-thinization design.
Background technology
In the last few years, along with the fast development of mobile communication technology, the exploitation of radio antenna had received very big concern.For example, for the hand communication terminal that overall dimension is tending towards miniaturization Design, built-in antenna has become main flow.Along with mobile communication by the continuous evolution of the second generation to the third generation, can be simultaneously more and more general at the terminal equipment of two or more systems, a plurality of frequency range work, as bimodulus, double standby mobile phone etc.In the face of this demand, adopt an antenna that covers a plurality of frequency ranges of a plurality of patterns than adopting two or more antennas to save the device space and cost more, also be necessary sometimes.
At present, the research of the multiband aerial of wireless communication terminal mainly concentrates on the PIFA (dull and stereotyped inverse-F antenna), is in the Chinese patent application of CN1409570A and CN1886863A as publication number, has proposed two kinds of multifrequency PIFA antenna structures respectively.As shown in Figure 1, they are respectively to realize multifrequency resonance at the diverse location increase parasitic antenna 30 of conventional PIFA aerial radiation sheet, and this class formation is the current multi-band antenna structure more widely that adopts.
Yet along with increasing of mobile communication mode and frequency band are expanded to higher frequency, the multifrequency PIFA antenna of this routine still is apparent not enough on bandwidth, and the increase of parasitic antenna makes the radiation fin area increase.In addition, the capacitive loading effect of PIFA structure has limited further compression stroke distance between aerial radiation sheet and printed circuit (PCB) mainboard, thereby is difficult to be applied on the terminal of miniaturization, ultra-thinization design.
Moreover as wireless communication terminals such as mobile phones, its overall dimension is more and more littler, the increasing trend of function is growing on and on, and as taking up room the antenna of one of parts greatly, obtainable space is subjected to limiting more in this more and more limited space.Therefore, need the exploitation antenna that frequency band is wideer, adaptability is stronger, to satisfy wireless communication terminal technical development demand.
Summary of the invention
At solving existing problem in the prior art, purpose of the present invention is exactly under ultra-thinization of wireless terminal compact in size such as current phone, function and the increasing trend of pattern, propose a kind of simple in structure, realize multifrequency ultra broadband built-in aerial flexibly, to satisfy the current and following potential demand.
In order to address the above problem, the radio communication terminal device that the invention provides a kind of built-in multiband antenna and have this antenna, the structure of this multiband antenna not only has the ultra broadband characteristic, and need not to be provided with short-circuit conductor and parasitic antenna has further been simplified its contour structures because of it, thereby it is suitable for being built in the wireless terminal of miniaturization, ultra-thinization design more.
In order to realize purpose of the present invention, be unipole antenna according to the basic structure of built-in multiband antenna of the present invention with similar PIFA form, this multiband antenna is made up of radiation fin unit, feed-through and PCB mainboard.Described radiation fin unit is rectangular substantially, and fluting is to form the multi resonant structure of shaking on it.Described PCB mainboard comprises and the first and the second portion that provides with reference to the metal-containing layer on ground of radiation fin unit opposed not containing metal composition that wherein, second portion extends from first.Feed-through is used for described radiation fin unit is linked to each other with the radiofrequency signal distributing point of described PCB mainboard.
Because the first of the PCB mainboard corresponding with the radiation fin unit is non-metallic dielectric layer, therefore, eliminated the capacitive loading effect of PIFA antenna, thereby make the spacing between radiation fin unit and the PCB mainboard to reduce significantly, therefore, antenna according to the present invention is specially adapted to have the terminal of ultra-thin feature.
According to multiband antenna of the present invention not needs short-circuit conductor and parasitic antenna, simple in structure, and have extremely wide working band, and it covers GSM, DCS, PCS, UMTS, TD-SCDMA, 2.4GHzWLAN, and its high band bandwidth has reached the ultra broadband of nearly 2GHz up to about 3.5GHz.
Description of drawings
Fig. 1 shows an example of the multiband antenna of prior art;
Fig. 2 shows the structure according to the multiband antenna of the embodiment of the invention;
Fig. 3 shows the frequency characteristic according to the multiband antenna of Fig. 2 of the embodiment of the invention.
Embodiment
The basic structure of multiband antenna of the present invention is the monopole radiation chip antenna with similar PIFA form.
As shown in Figure 2, multiband antenna according to an embodiment of the invention comprises radiation fin unit 201, printed circuit (PCB) mainboard 207 and the feed-through 204 that radiation fin unit 201 is connected to PCB mainboard 207.
Described radiation fin unit 201 roughly rectangular structures, and fluting 202 on it.According to of the present invention exemplary embodiment, described groove 202 is a U-lag, and provides basic many resonant bodies for this radiation fin structure.
As shown in Figure 2, the PCB mainboard 207 according to of the present invention exemplary embodiment is made of first 205 and second portion 206.The first 205 of PCB mainboard 207 relatively is provided with abreast with radiation fin unit 201, this part is the prefect dielectric material, metal-containing layer not, can eliminate the capacitive loading effect between radiation fin unit 201 and the PCB mainboard 207 like this, therefore, spacing between radiation fin unit 201 and the PCB mainboard 207 can be dwindled, even radiation fin unit 201 can be attached on the surface of first 205 of PCB mainboard 207, this advantage makes that the application of design of this antenna is more flexible, is specially adapted to extra-thin wireless communication terminal.Second portion 206 extends from first 205, and it contains metal level, and it provides with reference to ground for the radiation fin unit 201 of antenna.
Described feed-through 204 is the members that radiation fin unit 201 are connected to the radiofrequency signal distributing point on the PCB mainboard 207, and it is used for the radio signal transmission on the PCB mainboard 207 to radiation fin unit 201.As shown in Figure 2, feed-through 204 is connected between radiation fin unit 201 and the PCB mainboard 207, more particularly, so an end of feed-through 204 is connected to the side 203 of second portion 206 of the close PCB mainboard 207 of radiation fin unit 201, because the first 205 and the radiation fin unit 201 of PCB mainboard 207 relatively are provided with, therefore, feed-through 204 vertically extends correspondence position with the first 205 that is connected to PCB mainboard 207 from a described side 203 of radiation fin unit 201, that is the position of the radiofrequency signal distributing point of PCB mainboard 207.
The link position of feed-through 204 can change along a described side 203 of rectangular radiation blade unit 201, as preferred version, feed-through 204 is connected between the first 205 of the centre position of a described side 203 of radiation fin unit 201 and PCB mainboard 207, can obtain the maximum bandwidth characteristic like this.
The specific implementation form of described feed-through 204 can have a variety of, and it can be used as the extension of radiation fin unit 201, also can realize with the feeler (pogo pin) from 207 extensions of PCB mainboard that touches radiation fin unit 201.
Fig. 3 shows the frequency characteristic according to the antenna of Fig. 2 of the embodiment of the invention.
As shown in Figure 3, the figure shows the curve as the reflection coefficient S11 of the function of frequency, wherein, abscissa is represented frequency F (GHz), and ordinate is represented reflection coefficient S11 (dB).As can be seen from the figure, according to the working band of multiband antenna of the present invention about about 0.9GHz and at about 2GHz to approximately between the 3.2GHz, therefore, compared with prior art, its operating frequency range is very wide.
According to the structure of the multiband antenna of the embodiment of the invention not needs short-circuit conductor and parasitic antenna, therefore, it is simple in structure, and in addition, it also has extremely wide working band.
The present invention has realized having the built-in multiband antenna of ultra broadband characteristic, and it can cover GSM, DCS, PCS, UMTS, TD-SCDMA, 2.4GHz WLAN so that following more high frequency band; In addition, because the first of the PCB mainboard that relatively is provided with the radiation fin unit is the prefect dielectric material, can eliminate the capacitive loading effect between radiation fin unit and the PCB mainboard like this, thereby can dwindle the spacing between radiation fin unit and the PCB mainboard, therefore, multiband antenna according to the present invention is specially adapted to the especially wireless terminal of ultra-thinization of miniaturization.
Above preferred embodiments of the present invention have been disclosed for illustrative, but in claims institute restricted portion, can use thought of the present invention in a different manner, for example, the radiation fin unit can take different shapes and realize, and the shape of the groove on it also can change as required, in addition, the present invention does not also limit aspects such as the manufacture method of antenna and materials, for example, described antenna can be made by sheet metal, flexible printed circuit board (FPC) or other material, or the like.
Claims (7)
1, a kind of multiband antenna comprises:
The radiation fin unit;
The PCB mainboard;
Feed-through is used for described radiation fin unit is linked to each other with the radiofrequency signal distributing point of described PCB mainboard.
2, multiband antenna as claimed in claim 1 is characterized in that the rectangular shape in outside, described radiation fin unit, and has the multi resonant that forms by the slotting structure of shaking thereon.
3, multiband antenna as claimed in claim 1, it is characterized in that described PCB mainboard constitutes by first with from the extended second portion of first, described first is the dielectric-slab of no metal level, and and relatively setting parallel with described radiation fin unit, described second portion metal-containing layer, and for described radiation fin unit provide with reference to ground.
4, multiband antenna as claimed in claim 2 is characterized in that described groove is a U type groove.
5, multiband antenna as claimed in claim 3, an end that it is characterized in that described feed-through is connected to the side of second portion of the close described PCB mainboard of described radiation fin unit, and described feed-through extends perpendicular to described radiation fin unit and is connected to the PCB mainboard from a described end.
6, multiband antenna as claimed in claim 5 is characterized in that a described end of described feed-through is connected to the centre position of a described side of radiation fin unit.
7, a kind of built-in wireless communication terminal as any one described multiband antenna among the claim 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100062271A CN101505000A (en) | 2008-02-05 | 2008-02-05 | Multi-frequency band antenna and wireless communication terminal using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100062271A CN101505000A (en) | 2008-02-05 | 2008-02-05 | Multi-frequency band antenna and wireless communication terminal using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101505000A true CN101505000A (en) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100062271A Pending CN101505000A (en) | 2008-02-05 | 2008-02-05 | Multi-frequency band antenna and wireless communication terminal using the same |
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| Country | Link |
|---|---|
| CN (1) | CN101505000A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079562A1 (en) * | 2009-12-31 | 2011-07-07 | 中兴通讯股份有限公司 | Method for realizing terminal antenna, terminal antenna and terminal thereof |
| CN102386485A (en) * | 2011-09-15 | 2012-03-21 | 清华大学 | Loop and inverted-F-shaped reconfigurable cell phone built-in antenna |
| CN102906938A (en) * | 2010-04-06 | 2013-01-30 | 拉迪娜股份有限公司 | Antenna having a broadband power supply structural body, and a power supply method |
| CN105789895A (en) * | 2016-05-05 | 2016-07-20 | 图唐智能科技（上海）有限公司 | 4G antenna |
| CN106058442A (en) * | 2016-07-06 | 2016-10-26 | 广东通宇通讯股份有限公司 | Antenna |
| WO2018058300A1 (en) * | 2016-09-27 | 2018-04-05 | 北京小米移动软件有限公司 | Terminal housing and terminal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1431735A (en) * | 2002-01-10 | 2003-07-23 | 飞元科技股份有限公司 | Dual frequency flat surface type antenna of single dipole and its radiation sheet metal |
| CN2919565Y (en) * | 2006-02-28 | 2007-07-04 | 华南理工大学 | Built-in triple-frequency mobile phone antenna based on multi-branched band spread technology |
-
2008
- 2008-02-05 CN CNA2008100062271A patent/CN101505000A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1431735A (en) * | 2002-01-10 | 2003-07-23 | 飞元科技股份有限公司 | Dual frequency flat surface type antenna of single dipole and its radiation sheet metal |
| CN2919565Y (en) * | 2006-02-28 | 2007-07-04 | 华南理工大学 | Built-in triple-frequency mobile phone antenna based on multi-branched band spread technology |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079562A1 (en) * | 2009-12-31 | 2011-07-07 | 中兴通讯股份有限公司 | Method for realizing terminal antenna, terminal antenna and terminal thereof |
| US9013363B2 (en) | 2009-12-31 | 2015-04-21 | Zte Corporation | Method for realizing terminal antenna, terminal antenna and terminal thereof |
| CN102906938A (en) * | 2010-04-06 | 2013-01-30 | 拉迪娜股份有限公司 | Antenna having a broadband power supply structural body, and a power supply method |
| CN102386485A (en) * | 2011-09-15 | 2012-03-21 | 清华大学 | Loop and inverted-F-shaped reconfigurable cell phone built-in antenna |
| CN102386485B (en) * | 2011-09-15 | 2013-09-04 | 清华大学 | Loop and inverted-F-shaped reconfigurable cell phone built-in antenna |
| CN105789895A (en) * | 2016-05-05 | 2016-07-20 | 图唐智能科技（上海）有限公司 | 4G antenna |
| CN106058442A (en) * | 2016-07-06 | 2016-10-26 | 广东通宇通讯股份有限公司 | Antenna |
| WO2018058300A1 (en) * | 2016-09-27 | 2018-04-05 | 北京小米移动软件有限公司 | Terminal housing and terminal |
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Application publication date: 20090812 |