CN202997046U - Multiband antenna apparatus - Google Patents
Multiband antenna apparatus Download PDFInfo
- Publication number
- CN202997046U CN202997046U CN 201220734982 CN201220734982U CN202997046U CN 202997046 U CN202997046 U CN 202997046U CN 201220734982 CN201220734982 CN 201220734982 CN 201220734982 U CN201220734982 U CN 201220734982U CN 202997046 U CN202997046 U CN 202997046U
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- frequency band
- radiant element
- low
- antenna apparatus
- multiband antenna
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Abstract
The utility model provides a multiband antenna apparatus capable of easily carrying out impedance matching and antenna characteristics can be ensured. A radiation-component branch circuit (30) comprises a load reactance component (X1) for low frequency bands arranged between a branch point (BP) of the radiation-component branch circuit (30) and a radiation component (11) for the low frequency bands, and a branch load reactance component (X3) mounted between the branch point (BP) and a power supply point (FP), wherein the load reactance component (X1) for the low frequency bands and the branch load reactance component (X3) are inductors formed by coil patterns respectively and mutually carry out electromagnetic field coupling.
Description
Technical field
The utility model relates to a kind of antenna assembly of multiband, particularly a kind of multiband antenna apparatus that is loaded into the small-sized communication terminal device such as mobile telephone terminal.
Background technology
In recent years, in the small-sized communication terminal device such as mobile telephone terminal, for a plurality of frequency bands of correspondence, for example use multiband antenna as shown in patent documentation 1,2.
[prior art document]
[patent documentation]
[patent documentation 1] Japanese Patent Laid-Open 2007-13596 communique
No. 4508190 communique of [patent documentation 2] Japanese Patent Laid
The utility model content
[utility model problem to be solved]
Comprise the sort of multiband antenna apparatus shown in patent documentation 1,2, in design during multiband antenna apparatus, because the situation around antenna is usually different with different machines, so the adjustment of its impedance and being not easy.The situation of multiband antenna is even more serious.
Make radiant element branch halfway, respectively to one tunnel radiant element that distributes low-frequency band to use, the radiant element that distributes high frequency band to use to another road, in order to adjust resonance frequency separately, for example as shown in figure 10 antenna assembly is effective.In Figure 10, regulation begins to low-frequency band the 1st electrical length P1 till with the 2nd end 112 of radiant element 11, begins to high frequency band the 2nd electrical length P2 till with the 2nd end 122 of radiant element 12 and begin the 3rd electrical length P3 till the supply terminals FP from breakout BP from breakout BP from the breakout BP of radiant element branch circuit 30.
In Figure 10, by the 1st electrical length P1 and the 3rd electrical length P3 centre frequency f with low-frequency band
L(for example 900MHz) carries out 1/4 wave resonance.In addition, by the 2nd electrical length P2 and the 3rd electrical length P3 centre frequency f with high frequency band
H(for example 1800MHz) carries out 1/4 wave resonance.
The utility model is In view of the foregoing completed, and its purpose is to provide a kind of can easily carry out the not multiband antenna apparatus of variation of impedance matching and antenna performance.
[in order to the technical scheme of dealing with problems]
The utility model is a kind of multiband antenna apparatus, possesses: the low-frequency band radiant element, and this low-frequency band is connected with the radiant element branch circuit and the opening of the 2nd end with the 1st end of radiant element; The high frequency band radiant element, this high frequency band is connected with described radiant element branch circuit and the opening of the 2nd end with the 1st end of radiant element; And earthing conductor, this earthing conductor carries out the resonance action with described low-frequency band with radiant element and described high frequency band together with radiant element, this multiband antenna apparatus is characterised in that, described radiant element branch circuit has: low-frequency band load reactance element, and this low-frequency band is located at breakout that described radiant element branch circuit has and described low-frequency band with between radiant element with the load reactance element; And bifurcation load reactance element, this bifurcation load reactance element is located between described breakout and supply terminals, at least described low-frequency band is respectively the inductor that is made of coil pattern with load reactance element and described bifurcation load reactance element, and described low-frequency band is carried out electromagnetic field couples mutually with load reactance element and described bifurcation load reactance element.
Be preferably between described power supply circuits and described supply terminals load VSWR (Voltage Standing Wave Ratio: voltage standing wave ratio) improve and use impedance conversion element is arranged.
Be preferably and adopt following structure: namely, described low-frequency band is configured in the side close to from described earthing conductor with radiant element and described high frequency band with the 1st end of radiant element, the 2nd end is configured in the side away from from described earthing conductor, and described low-frequency band is coupled mutually via electric capacity with the 2nd end of radiant element and described high frequency band the 2nd end with radiant element.
[utility model effect]
According to the utility model, can obtain easily to carry out the not multiband antenna apparatus of variation of impedance matching and antenna performance.
Description of drawings
Fig. 1 (A) is the stereogram of the related multiband antenna apparatus 101 of execution mode 1 of the present utility model, and Fig. 1 (B) observes the stereogram of multiband antenna apparatus 101 take the viewpoint of Fig. 1 (A) as benchmark from the rear.
Fig. 2 is the vertical view of multiband antenna apparatus 101.
Fig. 3 is the figure that transformer, current path and electrical length that the radiant element branch circuit 30 of multiband antenna apparatus 101 consists of are shown.
Fig. 4 is the figure that resonance frequency and the anti-resonance frequency of multiband antenna apparatus 101 are shown.
Fig. 5 is the equivalent circuit diagram of multiband antenna apparatus 101 shown in Figure 3.
Fig. 6 (A) is the circuit diagram of the related multiband antenna apparatus of execution mode 2 102, and Fig. 6 (B) is the equivalent circuit diagram of the related multiband antenna apparatus of execution mode 2 102.
Fig. 7 is that the VSWR of the related multiband antenna apparatus of execution mode 3 improves the structure chart with impedance conversion element.
Fig. 8 is that another VSWR of the related multiband antenna apparatus of execution mode 3 improves the structure chart with impedance conversion element.
Fig. 9 is the expanded view of the multiband antenna apparatus shown in patent documentation 1.
Figure 10 is the figure that the structure of the antenna assembly that has possessed the radiant element branch circuit is shown.
Embodiment
" execution mode 1 "
Fig. 1 (A) is the stereogram of the related multiband antenna apparatus 101 of execution mode 1 of the present utility model, and Fig. 1 (B) observes the stereogram of multiband antenna apparatus 101 take the viewpoint of Fig. 1 (A) as benchmark from the rear.In addition, Fig. 2 is the vertical view of multiband antenna apparatus 101.
This multiband antenna apparatus 101 possesses printed wiring board 60 and antenna component 50, and described antenna component 50 is arranged on the ungrounded zone of this printed wiring board 60.The low-frequency band that antenna component 50 possesses dielectric body 10 and is formed on this dielectric body 10 surfaces with radiant element 11 and high frequency band with radiant element 12.A plurality of chip components and parts that printed wiring board 60 possesses base material 8, is formed at the earthing conductor 9 of this base material 8 and is installed on base material 8.
As Fig. 2 is represented, this multiband antenna apparatus 101 possesses radiant element branch circuit 30, power supply circuits 32 and VSWR to be improved with impedance conversion element 31, described branch circuit 30 comprises low-frequency band load reactance element (hereinafter referred to as " the 1st reactance component ") X1, the 2nd reactance component X2 and bifurcation load reactance element (hereinafter referred to as " the 3rd reactance component ") X3, and described VSWR improvement is carried between power supply circuits 32 and the 3rd reactance component X3 with impedance conversion element 31.For example, the 1st reactance component X1, the 2nd reactance component X2 and the 3rd reactance component X3 are inductive reactive element (inductors).The VSWR improvement uses the object lesson of impedance conversion element 31 by shown in execution mode described later.
Low-frequency band is connected with radiant element branch circuit 30 with the 1st end 111 of radiant element 11, and the 2nd end 112 is open.In addition, high frequency band is connected with radiant element branch circuit 30 with the 1st end 121 of radiant element 12, and the 2nd end 122 is open.
Low-frequency band is configured in the side close to from earthing conductor 9 with the 1st end 111 of radiant element 11, the 2nd end 112 is configured in the side away from from earthing conductor.In addition, high frequency band is configured in the side close to from earthing conductor 9 with the 1st end 121 of radiant element 12, the 2nd end 122 is configured in the side away from from earthing conductor 9.Therefore, with radiant element 11 and high frequency band are that produce between with radiant element 12 and earthing conductor 9, parasitic capacitance that radiation is not made contributions is less, radiation efficiency is higher in low-frequency band.
Fig. 3 is the figure that transformer, current path and electrical length that the radiant element branch circuit 30 of multiband antenna apparatus 101 consists of are shown.In addition, Fig. 4 is the figure that resonance frequency and the anti-resonance frequency of multiband antenna apparatus 101 are shown.
In Fig. 3, the 1st reactance component X1 and the 3rd reactance component X3 are respectively the inductors that is made of coil pattern, have consisted of transformer T by electromagnetic field couples (being mainly magnetic Field Coupling).
In Fig. 3, the breakout BP from radiant element branch circuit 30 is begun to low-frequency band the 1st electrical length till with the 2nd end 112 of radiant element 11 electrical length of path (low-band resonance) P1, begins to high frequency band the 2nd electrical length (electrical length of the high frequency band resonant path) P2 till with the 2nd end 122 of radiant element 12 and the 3rd electrical length P3 that begins till the supply terminals FP from breakout BP stipulates from breakout BP.
By the 1st electrical length P1 and the 3rd electrical length P3 centre frequency f with low-frequency band
L(for example 900MHz) carries out 1/4 wave resonance.In addition, by the 2nd electrical length P2 and the 3rd electrical length P3 centre frequency f with high frequency band
H(for example 1800MHz) carries out 1/4 wave resonance.
Determine anti-resonance frequency f by the 1st electrical length P1 and the 2nd electrical length P2
a(for example 1300MHz).That is, pass through electrical length P4 with anti-resonance frequency f in Fig. 3
aCarry out 1/2 wave resonance.
In addition, in Fig. 3, according to the 2nd electrical length P2 and the 1st electrical length P1 by the centre frequency f of electrical length with low-frequency band
LCarry out 3/4 wave resonance.
Fig. 5 is the equivalent circuit diagram of multiband antenna apparatus 101 shown in Figure 3.In Fig. 5, transformer T represents the transformer of transformer T as shown in Figure 3 with T-shaped equivalent electric circuit.In addition, in Fig. 5, represent to improve by the VSWR of Fig. 3 the circuit that is consisted of with impedance conversion element 31 and power supply circuits 32 with the terminal resistance 33 of 50 Ω.
As shown in Figure 5, the reactance of the resonant path of low-frequency band institute load is (L1+L3+2M), and the reactance of the resonant path institute load of high frequency band is (L2+L3).
Inductance increases 2 times of sizes of the mutual inductance M that is produced by electromagnetic field couples in low-frequency band.Thus, the physical size of coil of inductance L 1, the L3 of expectation can be reduced to consist of, consequently, the loss that is brought by the 1st reactance component X1 and the 3rd reactance component X3 can be reduced.
If represent the coupling coefficient of the 1st reactance component X1 and the 3rd reactance component X3 with k, described mutual inductance M is
Therefore, be preferably the coil that consists of the 1st reactance component X1 and the coil that consists of the 3rd reactance component X3 and carry out the strong-electromagnetic field coupling.
Therefore in addition, in the resonant path of high frequency band, the mutual inductance M that produces cancels out each other, and can suppress the impact that the coupling by the 1st reactance component X1 and the 3rd reactance component X3 brings.High frequency band is higher than the frequency of low-frequency band, therefore scarcely needs large inductance, and cancelling out each other of this mutual inductance M is gratifying.
" execution mode 2 "
Fig. 6 (A) is the circuit diagram of the related multiband antenna apparatus of execution mode 2 102, and Fig. 6 (B) is the equivalent circuit diagram of this multiband antenna apparatus 102.To be connected with the 4th reactance component X4 in power supply circuits one side of the 3rd reactance component X3 with the equivalent electric circuit difference as Fig. 3, execution mode 1 shown in Figure 5.In addition, be connected with the 5th reactance component X5 between the 1st reactance component X1 and low-frequency band are with radiant element 11.
The 4th reactance component X4 and the 5th reactance component X5 are the microcall inductive components that is not coupled with the 1st reactance component X1, the 2nd reactance component X2 and the 3rd reactance component X3, work as the external loading inductance.The 5th reactance component X5 works as the load inductance of low-frequency band with radiant element 11.
" execution mode 3 "
In the example of Fig. 7, the LC parallel circuits that is comprised of capacitor C6 and inductor L6 consists of VSWR improvement impedance conversion element 31.In this LC parallel circuits, the electric capacity of capacitor C6 and the inductance of inductor L6 are stipulated, make in low-frequency band to have inductive, have capacitive character at high frequency band, all mate at which frequency band from the impedance that power supply circuits 32 are observed radiant element one side.
In the example of Fig. 8, possesses inductor L1a, L1b, L2a and L2b.In Fig. 8, be connected with power supply circuits 32 on port # 1, be connected with radiant element branch circuit 30 on port # 2.
As shown in Figure 8, when the arrow a direction from port # 1 to figure provides electric current, in conductive pattern L1a along the arrow b direction current flowing in figure, and in conductive pattern L1b along the arrow c direction current flowing in figure.Then, utilize these electric currents, form with the magnetic flux shown in arrow A in scheming (by the magnetic flux of closed magnetic circuit).
Due to conductive pattern L1a with conductive pattern L2a is configured to wireline reel mutually and conductive pattern is overlapping, therefore current flowing b and induced current d is flow through along opposite direction in the magnetic field and conductive pattern L2a coupling that produce in conductive pattern L2a in conductive pattern L1a.Similarly, due to conductive pattern L1b with conductive pattern L2b is configured to wireline reel mutually and conductive pattern is overlapping, therefore current flowing c and induced current e is flow through along opposite direction in the magnetic field and conductive pattern L2b coupling that produce in conductive pattern L2b in conductive pattern L1b.Then, utilize these electric currents, form with shown in arrow B in scheming, magnetic flux by closed magnetic circuit.
The closed magnetic circuit of the magnetic flux A that is produced in the 1st inductance element by conductive pattern L1a, L1b is independent with the closed magnetic circuit of the magnetic flux B that is produced in the 2nd inductance element by conductive pattern L2a, L2b, therefore produces equivalent neticdomain wall MW between the 1st inductance element and the 2nd inductance element.
In addition, conductive pattern L1a and conductive pattern L2a are coupled by electric field.Similarly, conductive pattern L1b and conductive pattern L2b are coupled by electric field.Capacitor Ca, Cb in Figure 20 is the label that symbolically represents for the coupling capacitance of described field coupled.
The two carries out close coupling by magnetic field and electric field for the 1st inductance element (L1a, L1b) and the 2nd inductance element (L2a, L2b).Thus, the VSWR improvement can be also transformer device structure with impedance conversion element 31.
Thus, possessing has VSWR to improve with impedance conversion element 31, thus the impedance between power supply circuits 31 and multiband antenna apparatus mated, can obtain higher electrical efficiency.
Label declaration
BP: breakout
FP: supply terminals
L1a, L1b, L2a, L2b: inductor
M: mutual inductance
P1: the 1st electrical length
P2: the 2nd electrical length
P3: the 3rd electrical length
T: transformer
X1: the 1st reactance component (low-frequency band load reactance element)
X2: the 2nd reactance component
X3: the 3rd reactance component (bifurcation load reactance element)
X4: the 4th reactance component
X5: the 5th reactance component
8: base material
9: earthing conductor
10: dielectric body
11: the low-frequency band radiant element
12: the high frequency band radiant element
30: the radiant element branch circuit
31:VSWR improvement impedance conversion element
32: power supply circuits
33: terminal resistance
50: antenna component
60: printed wiring board
101,102: multiband antenna apparatus
111: low-frequency band the 1st end of radiant element
112: low-frequency band the 2nd end of radiant element
121: high frequency band the 1st end of radiant element
122: high frequency band the 2nd end of radiant element
Claims (3)
1. multiband antenna apparatus possesses:
The low-frequency band radiant element, this low-frequency band is connected with the radiant element branch circuit and the opening of the 2nd end with the 1st end of radiant element;
The high frequency band radiant element, this high frequency band is connected with described radiant element branch circuit and the opening of the 2nd end with the 1st end of radiant element; And
Earthing conductor, this earthing conductor carries out the resonance action with described low-frequency band with radiant element and described high frequency band together with radiant element,
This multiband antenna apparatus is characterised in that,
Described radiant element branch circuit has:
Low-frequency band load reactance element, this low-frequency band is located at breakout that described radiant element branch circuit has and described low-frequency band with between radiant element with the load reactance element; And
Bifurcation load reactance element, this bifurcation load reactance element is located between described breakout and supply terminals,
At least described low-frequency band is respectively the inductor that is made of coil pattern with load reactance element and described bifurcation load reactance element, and described low-frequency band is carried out electromagnetic field couples mutually with load reactance element and described bifurcation load reactance element.
2. multiband antenna apparatus as claimed in claim 1, is characterized in that,
Load has voltage standing wave ratio improvement impedance conversion element between power supply circuits and described supply terminals.
3. multiband antenna apparatus as claimed in claim 1 or 2, is characterized in that,
Described low-frequency band is configured in the side close to from described earthing conductor with radiant element and described high frequency band with the 1st end of radiant element, the 2nd end is configured in the side away from from described earthing conductor, and described low-frequency band is coupled mutually via electric capacity with the 2nd end of radiant element and described high frequency band the 2nd end with radiant element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012072693A JP5582158B2 (en) | 2012-03-28 | 2012-03-28 | Multiband antenna device |
| JP2012-072693 | 2012-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997046U true CN202997046U (en) | 2013-06-12 |
Family
ID=48568178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220734982 Expired - Lifetime CN202997046U (en) | 2012-03-28 | 2012-12-27 | Multiband antenna apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5582158B2 (en) |
| CN (1) | CN202997046U (en) |
Cited By (5)
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| CN103843194A (en) * | 2013-08-09 | 2014-06-04 | 华为终端有限公司 | Print-circuit board antenna and terminal |
| CN104201464A (en) * | 2014-08-05 | 2014-12-10 | 西安电子科技大学 | Frequency-reconfigurable triple-band antenna and method |
| CN105281020A (en) * | 2014-09-22 | 2016-01-27 | 维沃移动通信有限公司 | Mobile terminal antenna device and mobile terminal |
| CN112002993A (en) * | 2016-11-29 | 2020-11-27 | 株式会社村田制作所 | Antenna device and electronic apparatus |
| CN113708053A (en) * | 2016-02-19 | 2021-11-26 | 株式会社友华 | Antenna device |
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| JP5876863B2 (en) * | 2013-12-11 | 2016-03-02 | 原田工業株式会社 | Compound antenna device |
| KR102301421B1 (en) * | 2020-04-29 | 2021-09-14 | 주식회사 갤트로닉스 코리아 | Hybrid antenna for mobile communicative devices |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4082674B2 (en) * | 2003-03-10 | 2008-04-30 | ソニー・エリクソン・モバイルコミュニケーションズ株式会社 | ANTENNA DEVICE AND RADIO DEVICE |
| JP5187515B2 (en) * | 2008-10-24 | 2013-04-24 | 株式会社村田製作所 | ANTENNA DEVICE AND RADIO COMMUNICATION DEVICE |
| JP2011044999A (en) * | 2009-08-24 | 2011-03-03 | Nec Corp | Wireless communication apparatus |
| JP5507935B2 (en) * | 2009-09-14 | 2014-05-28 | 日本電気株式会社 | Antenna structure, radio communication apparatus, and antenna control method |
| KR101244902B1 (en) * | 2010-01-19 | 2013-03-18 | 가부시키가이샤 무라타 세이사쿠쇼 | Antenna device and communication terminal apparatus |
| WO2011090050A1 (en) * | 2010-01-19 | 2011-07-28 | 株式会社村田製作所 | Antenna device |
-
2012
- 2012-03-28 JP JP2012072693A patent/JP5582158B2/en active Active
- 2012-12-27 CN CN 201220734982 patent/CN202997046U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103843194A (en) * | 2013-08-09 | 2014-06-04 | 华为终端有限公司 | Print-circuit board antenna and terminal |
| US9666951B2 (en) | 2013-08-09 | 2017-05-30 | Huawei Device Co., Ltd. | Printed circuit board antenna and terminal |
| CN103843194B (en) * | 2013-08-09 | 2019-04-19 | 华为终端（东莞）有限公司 | Printed circuit board antenna and terminal |
| US10355357B2 (en) | 2013-08-09 | 2019-07-16 | Huawei Device Co., Ltd. | Printed circuit board antenna and terminal |
| US10819031B2 (en) | 2013-08-09 | 2020-10-27 | Huawei Device Co., Ltd. | Printed circuit board antenna and terminal |
| CN104201464A (en) * | 2014-08-05 | 2014-12-10 | 西安电子科技大学 | Frequency-reconfigurable triple-band antenna and method |
| CN104201464B (en) * | 2014-08-05 | 2018-02-02 | 西安电子科技大学 | A kind of frequency reconfigurable three-frequency antenna and method |
| CN105281020A (en) * | 2014-09-22 | 2016-01-27 | 维沃移动通信有限公司 | Mobile terminal antenna device and mobile terminal |
| CN113708053A (en) * | 2016-02-19 | 2021-11-26 | 株式会社友华 | Antenna device |
| CN113708053B (en) * | 2016-02-19 | 2023-08-18 | 株式会社友华 | Antenna device |
| CN112002993A (en) * | 2016-11-29 | 2020-11-27 | 株式会社村田制作所 | Antenna device and electronic apparatus |
| CN112002993B (en) * | 2016-11-29 | 2023-09-19 | 株式会社村田制作所 | Antenna device and electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013207437A (en) | 2013-10-07 |
| JP5582158B2 (en) | 2014-09-03 |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |