CN104836021A - Communication device - Google Patents
Communication device Download PDFInfo
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- CN104836021A CN104836021A CN201410048861.7A CN201410048861A CN104836021A CN 104836021 A CN104836021 A CN 104836021A CN 201410048861 A CN201410048861 A CN 201410048861A CN 104836021 A CN104836021 A CN 104836021A
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- feed
- reactance circuit
- frequency band
- communicator
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Abstract
The invention provides a communication device. The communication device comprises a grounding element and an antenna element. The antenna element comprises a metal portion, a first feed-in branch and a second feed-in branch. The metal part is close to an edge of the grounding element. The first feed-in branch and the second feed-in branch are respectively connected to a first feed-in point and a second feed-in point on the metal portion in a coupling manner, so the antenna element is approximately in the shape of an inverted F. The first feed-in branch comprises a first reactance circuit, and the first feed-in point is connected to a first signal source via the first reactance circuit in a coupling manner. The second feed-in branch comprises a second reactance circuit, and the second feed-in point is connected to a second signal source via the second reactance circuit in a coupling manner. The communication device provided by the invention can effectively reduce the complexity of a whole system and improves overall antenna efficiency.
Description
Technical field
The present invention relates to a kind of communicator, particularly a kind of communicator and miniaturized double-fed thereof enter inverted-F antenna element (Small-size Dual-feed Inverted-F Antenna Element).
Background technology
In recent years, the antenna element of mobile communications device is the characteristic reaching miniaturization and multiband, usually can adopt active diverter switch.By operating active diverter switch, antenna element can switch to different match circuits in each frequency band, or restructuring antenna element itself obtains different resonance path, thus reaches the Antenna Design of multiband.But because the circuit design of active diverter switch is comparatively complicated, it often can cause complexity and the cost increase of integrated antenna system, and easily reduce the radiation efficiency of antenna element.Therefore, how to improve the shortcoming of active diverter switch in mobile communications device, become a major challenge of antenna designers now.
Summary of the invention
In order to solve the problem of prior art, the invention provides a kind of communicator of novelty, it at least comprises the simple miniaturized double-fed of structure and enters inverted-F antenna element.This kind of antenna element comprises a metal section of two feed-in branch roads and simple shape, wherein this two feed-ins branch road makes antenna element excite low frequency and the high frequency band of generation wideband, to contain the multi-band operation of LTE/WWAN (Long Term Evolution/Wireless Wide Area Network) frequency band respectively.
In the preferred embodiment, the invention provides a kind of communicator, comprising: an earth element, there is an edge; And an antenna element, comprise a metal section, one first feed-in branch road, and one second feed-in branch road, wherein this metal section is adjacent to this edge of this earth element, and this first feed-in branch road and this second feed-in branch road are coupled to one first load point in this metal section and one second load point respectively, this antenna element is made to be roughly a font of falling F; Wherein this first feed-in branch road comprises one first reactance circuit, this first load point is coupled to one first signal source via this first reactance circuit, this the second feed-in branch road comprises one second reactance circuit, and this second load point is coupled to a secondary signal source via this second reactance circuit.
This metal section of this antenna element has two load points, that is, this first load point and this second load point.In certain embodiments, when one first FD feed of this first signal source carrys out this antenna element of feed-in via this first load point, this antenna element excites generation one first frequency band; And when one second FD feed in this secondary signal source carrys out this antenna element of feed-in via this second load point, this antenna element excites generation one second frequency band, wherein, the frequency of this first frequency band is lower than the frequency of this second frequency band.In certain embodiments, this first frequency band is about between 704MHz to 960MHz, and this second frequency band is about between 1710MHz to 2690MHz.In certain embodiments, this metal section is roughly a vertical bar shaped or inverted L-shaped.In certain embodiments, this first load point and this second load point are all positioned at or are adjacent to a side or an end points of this metal section.Under this design, this first load point and this second load point all can make full use of the resonance path that this metal section can provide.Therefore, the size of this metal section can utilize with being optimized, thus the miniaturization of attainable cost invention antenna element, designs simplification, and the characteristic of multi-band operation.
In certain embodiments, when this antenna element operates in this first frequency band, this first reactance circuit has a high reactance value in this second frequency band, and this will cause this first reactance circuit to have the characteristic that approximate band refuses (Band Rejection) in this second frequency band, be affect the operation of this antenna element in this first frequency band with this second FD feed in this secondary signal source by unlikely.In certain embodiments, this first reactance circuit also can make the frequency range of this first frequency band increase.
In certain embodiments, when this antenna element operates in this second frequency band, this second reactance circuit has a high reactance value in this first frequency band, and this has the approximate characteristic of refusing of being with by causing this second reactance circuit in this first frequency band, be affect the operation of this antenna element in this second frequency band with this first FD feed of this first signal source by unlikely.In certain embodiments, this second reactance circuit more can make the frequency range of this second frequency band increase.
In certain embodiments, this metal section is positioned at a headroom interval, and does not overlap each other with this earth element.In certain embodiments, this first reactance circuit and this second reactance circuit are all positioned on this earth element.In further embodiments, this first reactance circuit and this second reactance circuit are all positioned at this headroom interval, and do not overlap each other with this earth element.In certain embodiments, this first reactance circuit and this second reactance circuit and this metal section co-integration on a medium substrate, and do not overlap each other with this earth element.That is this first reactance circuit and this second reactance circuit can take the design space on this earth element.
In certain embodiments, this antenna element of the present invention only must take undersized headroom interval (such as, its area is only about 30 × 10mm
2), this first frequency band of wideband and this second frequency band (such as, LTE/WWAN frequency band, it is about between 704MHz to 960MHz, and about between 1710MHz to 2690MHz) can be contained.Compare with traditional design mode, the present invention replaces active diverter switch with passive type circuit, and it can reduce the complexity of total system effectively, and promote integrated antenna efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram showing communicator described according to a first embodiment of the present invention;
Fig. 2 is the S parameter figure of the antenna element showing communicator described according to a first embodiment of the present invention;
Fig. 3 is the antenna efficiency figure of the antenna element showing communicator described according to a first embodiment of the present invention;
Fig. 4 is the schematic diagram showing communicator described according to a second embodiment of the present invention; And
Fig. 5 is the schematic diagram showing communicator described according to a third embodiment of the present invention.
Wherein, description of reference numerals is as follows:
100,400,500 ~ communicator;
10 ~ earth element;
The edge of 101 ~ earth element;
11,41,51 ~ antenna element;
12,42,52 ~ metal section;
121,421,521 ~ the first load points;
122,422,522 ~ the second load points;
13,43,53 ~ the first feed-in branch roads;
131,431,531 ~ the first reactance circuits;
14,44,54 ~ the second feed-in branch roads;
141,441,541 ~ the second reactance circuits;
15 ~ the first signal sources;
16 ~ secondary signal source;
201 ~ reflection coefficient (S
11) curve;
202 ~ reflection coefficient (S
22) curve;
203 ~ isolation (S
21) curve;
21 ~ the first frequency bands;
22 ~ the second frequency bands;
The antenna efficiency curve of 31 ~ the first frequency bands;
The antenna efficiency curve of 32 ~ the second frequency bands.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, cited below particularly go out specific embodiments of the invention, and coordinate institute's accompanying drawings, be described in detail below.
Fig. 1 is the schematic diagram showing communicator 100 described according to a first embodiment of the present invention.Communicator 100 can be a smart mobile phone (Smart Phone), a panel computer (Tablet Computer), or a notebook computer (Notebook Computer).As shown in Figure 1, communicator 100 at least comprises earth element 10 and an antenna element 11.Antenna element 11 comprises metal section 12, a 1 first feed-in branch road 13, and one second feed-in branch road 14.Metal section 12 is adjacent to an edge 101 of earth element 10.Metal section 12 can be roughly a vertical bar shaped.First feed-in branch road 13 and the second feed-in branch road 14 are coupled to one first load point 121 and one second load point 122 in metal section 12 respectively, make antenna element 11 be roughly a font of falling F.First feed-in branch road 13 comprises one first reactance circuit 131, and wherein the first load point 121 is coupled to one first signal source 15 via the first reactance circuit 131.First reactance circuit 131 can comprise one or more capacity cell or (and) inductance element, such as: chip capacitor or (and) chip inducer.First signal source 15 can be a radio frequency (Radio Frequency, the RF) module of communicator 100, and its one first FD feed that can produce low frequency carrys out excitation antenna element 11.Second feed-in branch road 14 comprises one second reactance circuit 141, and wherein the second load point 122 is coupled to a secondary signal source 16 via the second reactance circuit 141.Second reactance circuit 141 can comprise one or more capacity cell or (and) inductance element, such as: chip capacitor or (and) chip inducer.Secondary signal source 16 can be another radio-frequency module of communicator 100, and its one second FD feed that can produce high frequency carrys out excitation antenna element 11.In the embodiment in figure 1, metal section 12 is positioned at the headroom interval do not overlapped each other with earth element 10, and the first reactance circuit 131 and the second reactance circuit 141 are all positioned on earth element 10.Must be noted that communicator 100 also can comprise other elements, such as: a contact panel, a processor, a loud speaker, a battery, and a shell (not shown).
Fig. 2 is S parameter (S parameter) figure of the antenna element 11 showing communicator 100 described according to a first embodiment of the present invention.In certain embodiments, the component size of communicator 100 and component parameters can as what follows.The length of earth element 10 is about 200mm, and width is about 150mm.The ground plane dimensions of the roughly equivalent general 9.7 inch panel computers of size of earth element 10.The length of antenna element 11 is about 30mm, and width is about 10mm.According to the measurement of Fig. 2, when antenna element 11 by the first signal source 15 by the first reactance circuit 131 excite time, antenna element 11 can operate in one first frequency band 21, as reflection coefficient (S
11) shown in curve 201.In addition, when antenna element 11 by secondary signal source 16 by the second reactance circuit 141 excite time, antenna element 11 also can operate in one second frequency band 22, as reflection coefficient (S
22) shown in curve 202.In the preferred embodiment, the first frequency band 21 can contain LTE700/GSM850/900 frequency band, and it is about between 704MHz to 960MHz; And the second frequency band 22 can contain GSM1800/1900/UMTS/LTE2300/2500 frequency band, it is about between 1710MHz to 2690MHz.First reactance circuit 131 can have the characteristic that approximate band refuses (Band Rejection) in the second frequency band 22, and therefore this second FD feed in secondary signal source 16 will not easily affect the operation of antenna element 11 in the first frequency band 21.First reactance circuit 131 more can make the frequency range of the first frequency band 21 increase.Second reactance circuit 141 also can have the characteristic that approximate band is refused in the first frequency band 21, and therefore this first FD feed of the first signal source 15 also not easily affects the operation of antenna element 11 in the second frequency band 22.Second reactance circuit 141 also can make the frequency range of the second frequency band 22 increase.By using the first reactance circuit 131 and the second reactance circuit 141, the isolation (S of antenna element 11
21) curve 203 all roughly lower than-25dB, can meet the demand of high-isolation between antenna in the first frequency band 21 and the second frequency band 22.
Fig. 3 is antenna efficiency (Antenna Efficiency) figure of the antenna element 11 showing communicator 100 described according to a first embodiment of the present invention.Aforesaid antenna efficiency is comprised the radiation efficiency returning loss.According to the measurement of Fig. 3, the antenna efficiency curve 31 of antenna element 11 in the first frequency band 21 (LTE700/GSM850/900 frequency band) is about between 67% to 75%, and the antenna efficiency curve 32 of antenna element 11 in the second frequency band 22 (GSM1800/1900/UMTS/LTE2300/LTE2500 frequency band) is about between 73% to 96%.Therefore, the antenna efficiency of antenna element 11 can realistic application demand.
Fig. 4 is the schematic diagram showing communicator 400 described according to a second embodiment of the present invention.Fig. 4 and Fig. 1 is similar.In a second embodiment, one first reactance circuit 431,1 second reactance circuit 441 of an antenna element 41, and a metal section 42 is all positioned at a headroom interval.In other words, metal section 42, first reactance circuit 431, and the second reactance circuit 441 does not all overlap each other with earth element 10.In certain embodiments, metal section 42, first reactance circuit 431, and second reactance circuit 441 co-integration on a medium substrate, such as: a FR4 (Flame Retardant4) substrate, wherein this medium substrate and earth element 10 do not overlap each other.In addition, metal section 42 can be roughly one inverted L-shaped, to make full use of the area in this headroom interval.In other embodiments, metal section 42 also can have other shapes, and such as: a reverse U shape, or one is J-shaped.All the other features of second embodiment are all similar to the first embodiment, so two embodiments all can reach similar operating effect.
Fig. 5 is the schematic diagram showing communicator 500 described according to a third embodiment of the present invention.Fig. 5 and Fig. 1 is similar.In the third embodiment, one first load point 521 of one antenna element 51 and one second load point 522 are all positioned at or are adjacent to a side or an end points of a metal section 52, the resonance path making the first load point 521 and the second load point 522 all can make full use of metal section 52 to provide.In more detail, metal section 52 comprises not wide structure, and this not wide structure comprises a narrower part part and a wider part part, wherein the first load point 521 can be positioned on an end points of this narrower part part, and the second load point 522 can be positioned on a side of this narrower part part.All the other features of 3rd embodiment are all similar to the first embodiment, so two embodiments all can reach similar operating effect.
It should be noted that above-described component size, component shape, and frequency range all non-be restrictive condition of the present invention.Antenna designers can need to adjust these set points according to difference.Communicator of the present invention and antenna structure are not limited in the state illustrated in Fig. 1-5.The present invention only can comprise any one or more of feature of one or more embodiment any of Fig. 1-5.In other words, and the illustrated feature of not all must be implemented in the middle of communicator of the present invention and antenna structure simultaneously.
Ordinal number in this specification and claim, such as " first ", " second ", " the 3rd " etc., do not have the precedence relationship in order each other, it only has the different elements of same name for indicating differentiation two.
Though the present invention with preferred embodiment openly as above; so itself and be not used to limit scope of the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion of defining depending on appended claim.
Claims (10)
1. a communicator, comprising:
One earth element, has an edge; And
One antenna element, comprise a metal section, one first feed-in branch road, and one second feed-in branch road, wherein this metal section is adjacent to this edge of this earth element, and this first feed-in branch road and this second feed-in branch road are coupled to one first load point in this metal section and one second load point respectively, this antenna element is made to be roughly a font of falling F;
Wherein this first feed-in branch road comprises one first reactance circuit, this first load point is coupled to one first signal source via this first reactance circuit, this the second feed-in branch road comprises one second reactance circuit, and this second load point is coupled to a secondary signal source via this second reactance circuit.
2. communicator as claimed in claim 1, wherein this metal section is roughly a vertical bar shaped or inverted L-shaped.
3. communicator, wherein this metal section, this first reactance circuit as claimed in claim 1, and this second reactance circuit does not all overlap each other with this earth element.
4. communicator as claimed in claim 1, wherein this first load point and this second load point are all positioned at or are adjacent to a side or an end points of this metal section.
5. communicator as claimed in claim 1, wherein this antenna element at least operates in one first frequency band and one second frequency band, and the frequency of this first frequency band is lower than the frequency of this second frequency band.
6. communicator as claimed in claim 5, wherein this first frequency band is about between 704MHz to 960MHz, and this second frequency band is about between 1710MHz to 2690MHz.
7. communicator as claimed in claim 5, wherein this first reactance circuit has the characteristic that approximate band is refused in this second frequency band.
8. communicator as claimed in claim 5, wherein this second reactance circuit has the characteristic that approximate band is refused in this first frequency band.
9. communicator as claimed in claim 5, wherein this first reactance circuit makes the frequency range of this first frequency band increase.
10. communicator as claimed in claim 5, wherein this second reactance circuit makes the frequency range of this second frequency band increase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410048861.7A CN104836021A (en) | 2014-02-12 | 2014-02-12 | Communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410048861.7A CN104836021A (en) | 2014-02-12 | 2014-02-12 | Communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104836021A true CN104836021A (en) | 2015-08-12 |
Family
ID=53813745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410048861.7A Pending CN104836021A (en) | 2014-02-12 | 2014-02-12 | Communication device |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450776A (en) * | 2016-09-29 | 2017-02-22 | 宇龙计算机通信科技(深圳)有限公司 | Antenna device and mobile terminal |
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| US20090278755A1 (en) * | 2008-05-12 | 2009-11-12 | Sony Ericsson Mobile Communications Japan, Inc. | Antenna device and communication terminal |
| WO2011024280A1 (en) * | 2009-08-27 | 2011-03-03 | 株式会社 東芝 | Antenna device and communication device |
| US20120075158A1 (en) * | 2009-06-03 | 2012-03-29 | Murata Manufacturing Co., Ltd. | Antenna module |
| CN102893452A (en) * | 2010-06-18 | 2013-01-23 | 索尼爱立信移动通讯有限公司 | Two port antennas with separate antenna branches including respective filters |
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2014
- 2014-02-12 CN CN201410048861.7A patent/CN104836021A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1650475A (en) * | 2002-10-15 | 2005-08-03 | 株式会社日立制作所 | Small multiple mode antenna and high frequency module using it |
| CN101277123A (en) * | 2007-03-27 | 2008-10-01 | 连展科技电子（昆山）有限公司 | Apparatus and method for switching wide band antenna frequency band |
| US20090278755A1 (en) * | 2008-05-12 | 2009-11-12 | Sony Ericsson Mobile Communications Japan, Inc. | Antenna device and communication terminal |
| US20120075158A1 (en) * | 2009-06-03 | 2012-03-29 | Murata Manufacturing Co., Ltd. | Antenna module |
| WO2011024280A1 (en) * | 2009-08-27 | 2011-03-03 | 株式会社 東芝 | Antenna device and communication device |
| CN102893452A (en) * | 2010-06-18 | 2013-01-23 | 索尼爱立信移动通讯有限公司 | Two port antennas with separate antenna branches including respective filters |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450776A (en) * | 2016-09-29 | 2017-02-22 | 宇龙计算机通信科技(深圳)有限公司 | Antenna device and mobile terminal |
| CN106450776B (en) * | 2016-09-29 | 2019-06-11 | 宇龙计算机通信科技(深圳)有限公司 | Antenna assembly and mobile terminal |
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Application publication date: 20150812 |