CN106384893A - Antenna matching circuit and wireless communication terminal - Google Patents
Antenna matching circuit and wireless communication terminal Download PDFInfo
- Publication number
- CN106384893A CN106384893A CN201611021017.0A CN201611021017A CN106384893A CN 106384893 A CN106384893 A CN 106384893A CN 201611021017 A CN201611021017 A CN 201611021017A CN 106384893 A CN106384893 A CN 106384893A
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- wireless communication
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- 238000004891 communication Methods 0.000 title claims abstract description 20
- 230000005669 field effect Effects 0.000 claims description 7
- 239000003990 capacitor Substances 0.000 description 12
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005404 monopole Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- Transceivers (AREA)
Abstract
An antenna matching circuit and a wireless communication terminal are disclosed. The antenna matching circuit comprises an antenna having a feeding pin, and a switch module serially connected to the feeding pin and to a feeding end, wherein the switch module comprises two or more paths of switch circuits in parallel connection. Each path of switch circuit matches with different work frequency ranges, and comprises a switch device and a matching circuit in serial connection. The antenna matching circuit improves the performance of the antenna in each frequency range.
Description
Technical field
The present invention relates to antenna technical field, more particularly, to a kind of antenna-matching circuit and wireless communication terminal.
Background technology
In multiple communication standards now and under the situation deposited, the particularly popularization of 4G, the frequency range of operating handset gets more and more,
These require that antenna is devised bigger bandwidth, to cover all conventional frequency ranges.Simultaneously as cell phone appearance designs not
Break and incorporate new fashion and aesthetic feeling element, a large amount of utilizations of metallic element, so that antenna size is constantly reduced, antenna environment is more disliked
Bad, further increase the design difficulty of antenna for mobile phone.
Under present circumstances, in order to cover the wide bandwidth of 4G LTE low-frequency range, antenna for mobile phone debugging is upper mainly to adopt two kinds of sides
Method, one is loaded switches unit on antenna, and two is loading tunable capacitor device on antenna.
The method of loaded switches device has two kinds of implementations：One is that switching device is connected in series to the one of ground of antenna
Foot, then connect an electric capacity or inductance component, to ground, walk different couplings by on-off control antenna and be routed to ground, refer to
Fig. 1, antenna 10 is connected with earth terminal 11 and earth terminal 12 by grounding leg, is connected with feed end 14 by feeding foot, will switch
Unit 15 is connected in series on one of grounding leg, is connected with earth terminal 11, and described switch element 15 includes being connected in series to derailing switch
Part and inductively or capacitively, controls antenna to walk different couplings by switch element 15 and is routed to ground, to affect the resonance of antenna
Frequency is thus realize switching and the optimization of antenna different frequency range；Refer to Fig. 2, another kind of implementation method is then by switch element 21
It is connected in series on the grounding leg of diverse location on antenna 10, is connected with earth terminal 20, to control antenna to walk different connecing by switch
Ground path, affecting the resonant frequency of antenna thus realizing switching and the optimization of different frequency, so not needing still further to connect
Capacitor and inductor device.
The method loading tunable capacitor equally also has two kinds of implementations：Refer to Fig. 3, one is the feed foot in antenna 10
One tunable capacitor 30 of upper series connection, is connected with feed end 14, by changing the bias voltage size on tunable capacitor 30 thus obtaining
To different size of capacitance, to realize the different capacitance of antenna in series, and then to realize the switching of each frequency range of antenna and excellent
Change；Refer to Fig. 4, two is to load tunable capacitor 40 on the grounding leg of antenna 10 to connect to earth terminal, by different biasings
Voltage obtains different capacitances, makes antenna ground foot connect different electric capacity with arriving, to realize the switching of each frequency range and excellent
Change.
Although said method is capable of the bandwidth of extended antenna to a certain extent, the performance of lifting antenna, also have
Larger limitation, performance need further to improve.
Content of the invention
The technical problem to be solved is to provide a kind of antenna-matching circuit and wireless communication terminal, improves
Described antenna-matching circuit and the performance of wireless communication terminal.
For solving the above problems, the present invention proposes a kind of antenna-matching circuit, including：Antenna, described antenna has feed
Foot；Switch module, described switch module is connected serially to described feed foot, and connects to feed end, and described switch module includes：Two-way
The on-off circuit of more parallel, is respectively used to mate different working frequency range, and each path switching circuit all includes being connected in series
Switching device and match circuit.
Optionally, different on-off circuits are respectively provided with different match circuits.
Optionally, described match circuit include single electric capacity, single inductance, the matching network of L-type, π type matching network, with
And at least one in the mixing match network of L-type and π type.
Optionally, different on-off circuits adopt identical switching device.
Optionally, described switching device includes in diode, audion, field-effect transistor and IGCT at least one
Kind.
Optionally, described antenna also has grounding leg, for being grounded.
For solving the above problems, the present invention also provides a kind of wireless communication terminal, including an antenna-matching circuit, its feature
It is, described antenna-matching circuit includes：Antenna, described antenna has feed foot；Switch module, described switch module is connected serially to
Described feed foot, and connect to feed end, described switch module includes：The on-off circuit of two-way more parallel, each way switch
Circuit all includes switching device and the match circuit being connected in series.
Optionally, different on-off circuits are respectively provided with different match circuits.
Optionally, described match circuit include single electric capacity, single inductance, the matching network of L-type, π type matching network, with
And at least one in the mixing match network of L-type and π type.
Optionally, different on-off circuits adopt identical switching device.
Optionally, described switching device includes in diode, audion, field-effect transistor and IGCT at least one
Kind.
Optionally, described antenna also has grounding leg, for being grounded.
The antenna-matching circuit of the present invention in the feed foot tandem tap module of antenna, described switch module include multiple simultaneously
The on-off circuit of connection, corresponds to different working frequency range respectively, and described on-off circuit includes switching device and the match circuit connected,
By controlling in each on-off circuit, the turned on or off of switching device, the antenna making respectively passes through different switch electricity
Road connects to feed end.On each on-off circuit, it is respectively equipped with different match circuits, so that each frequency range can be obtained very well
Coupling.Compared with prior art, described antenna-matching circuit is more widely applied, and cost is lower.
The wireless communication terminal of the present invention has above-mentioned antenna-matching circuit, thus having more preferable performance for wireless communications.
Brief description
Fig. 1 is the structural representation of the antenna-matching circuit of prior art of the present invention；
Fig. 2 is the structural representation of the antenna-matching circuit of prior art of the present invention；
Fig. 3 is the structural representation of the antenna-matching circuit of prior art of the present invention；
Fig. 4 is the structural representation of the antenna-matching circuit of prior art of the present invention；
Fig. 5 is the structural representation of the antenna-matching circuit of the embodiment of the invention；
Fig. 6 is the structural representation of the switch module of antenna-matching circuit of the embodiment of the invention.
Specific embodiment
As stated in the Background Art, switch the scheme loading due to needing for switching device to be connected in series to ground, so requiring sky
Line must have grounding leg, and the form of such antenna just can only be confined to PIFA or IFA form, for not having grounding leg
Monopole antenna, this kind of method then cannot be applied；On the other hand, because capacitor and inductor device is confined to be connected in series to ground, antenna
More matching network forms cannot be selected.And tunable capacitor loading scheme can be connected on feed foot and can also be connected on ground
Foot, therefore do not limited to by antenna form, but because tunable capacitor device is capacitive in itself, just can only do electric capacity and adjust
Humorous, then less applicable during for antenna impedance itself just in capacitive；On the other hand, because tunable capacitor device ratio itself is opened
Close device expensive, so also can bring on cost than switching device further increasing.
The antenna-matching circuit below in conjunction with the accompanying drawings present invention being provided and the specific embodiment of wireless communication terminal
Elaborate.
Refer to Fig. 5, be the structural representation of the antenna-matching circuit of the embodiment of the invention.
Described antenna-matching circuit includes：Antenna 510, described antenna has feed foot 511；Switch module 520, described opens
Close module 520 and be connected serially to described feed foot 511, and connect to feed end 512.
The feed foot 511 of described antenna 510 is used for connecting to feed end 512, and described feed end 512 is the end of holding wire
Mouthful, as signal input or output port.Described switch module 520 is used in different frequency range, impedance of antenna etc. is carried out
Join, make antenna 510 have suitable resonant frequency in each working frequency range, so that antenna 510 performance on different frequency bands
More optimize.
In the specific embodiment of the present invention, described antenna 510 can be one pole (monopole) antenna, be not grounded
Foot.In other specific embodiments of the present invention, described antenna 510 can also be PIFA (plane inverse F type) antenna or
IFA (reversed F-typed) antenna, not only has feed foot, also has grounding leg.In this embodiment, described antenna 510 also has
There is grounding leg 513, for connecting ground terminal 514, to be grounded.
In the specific embodiment of the present invention, described switch module includes：The on-off circuit of two-way more parallel, each
Path switching circuit all includes switching device and the match circuit being connected in series.
Refer to Fig. 6, be the concrete structure schematic diagram of the switch module 520 of a specific embodiment of the present invention.Institute
State switch module 520 and include double switch circuit, respectively on-off circuit 610 and on-off circuit 620, described on-off circuit 610
Including switching device 611 and match circuit 612；Described on-off circuit 620 includes switching device 621 and match circuit 622.Described
On-off circuit 610 and on-off circuit 620 are connected in parallel to described first end 601 and the second end 602, and described first end 601 is even
It is connected to feed foot 511 (refer to Fig. 5), described second end 602 connects to feed end 512 (refer to Fig. 5) it is also possible to described the
Two ends 602 connect to feed foot 512 (refer to Fig. 5), and described first end 601 connects to feed end 512 (refer to Fig. 5).
Described match circuit 612 and match circuit 622 are respectively provided with different match circuit forms, can be single electricity
At least one in appearance, single inductance, the mixing match network of the matching network of L-type, π type matching network and L-type and π type,
Wherein the coupling device value in the mixing match network of the matching network of L-type, π type matching network and L-type and π type can make
Electric capacity or inductance, any independent assortment.Above-mentioned so that match circuit 612 and match circuit 622 can realize different frequency range
Different matching network, thus preferably debug the performance of each frequency range of antenna.
Above-mentioned switching device 611 and switching device 621 can be adopted as identical or different switching device, specifically, permissible
For diode, audion, field-effect transistor or IGCT etc., in this embodiment, described switching device 611 and opening
Pass device 621 is simple single-pole single-throw switch (SPST).In other specific embodiments of the present invention, described switching device can be
Diode, audion, field-effect transistor or IGCT, by suitable control signal, control the conducting of described switching device
And off-state, thus realize the selection of on-off circuit.For example, in this embodiment, described switching device 611 breaks
Open, described switching device 621 turns on, the on-off circuit 620 between described first end 601 and the second end 602 turns on, described coupling
Circuit 622 feeds the match circuit between foot 511 and feed end 512 as antenna, such that it is able to by described match circuit 622
Antenna is debugged.Described on-off circuit 610 and on-off circuit 620 correspond to different frequency range respectively, such as GSM900 and
GSM1800, thus being respectively directed to different frequency range, is debugged to antenna by match circuit 612 and match circuit 622, to carry
High antenna is in the service behaviour of each frequency range.
In other specific embodiments of the present invention, described switch module 520 can also include two or more parallel connection
On-off circuit, such as 3,4,5,6 etc., different on-off circuits is respectively provided with different match circuits, with right respectively
Answer different working frequency range.By controlling in each on-off circuit, the turned on or off of switching device, the antenna making respectively
510 are connected to feed end 512 by different on-off circuits.Different couplings can be respectively provided with each on-off circuit
Circuit, makes each frequency range can be mated well.
Because described switch module 520 is connected on feed foot 511, application relatively broad it is adaptable to all types of
Antenna.And, the match circuit on each on-off circuit is also not limited to be connected in series to the sole mode on ground, but can set
Count into the network of any formation, any capacitor and inductor device can use, and, described on-off circuit is more cheap than tunable capacitor
Many, so having significant cost advantage.
The specific embodiment of the present invention also provides a kind of wireless communication terminal.
Described wireless communication terminal includes antenna-matching circuit as shown in Figure 5, and described antenna-matching circuit includes：Antenna
510, described antenna 510 has feed foot 511；Switch module 520, described switch module 520 is connected serially to described feed foot 511,
And connect to feed end 512, described switch module 520 includes：The on-off circuit of two-way more parallel, each path switching circuit is equal
Including the switching device being connected in series and match circuit.In this embodiment, described antenna 510 also has grounding leg
513, for connecting ground terminal 514, to be grounded.
Fig. 6 is the concrete structure schematic diagram of a switch module 520.Described switch module 520 includes double switch circuit, point
Not Wei on-off circuit 610 and on-off circuit 620, described on-off circuit 610 includes switching device 611 and match circuit 612；Described
On-off circuit 620 includes switching device 621 and match circuit 622.Described on-off circuit 610 and on-off circuit 620 are connected in parallel
To described first end 601 and the second end 602, described first end 601 connects to feed foot 511 (refer to Fig. 5), and described second
End 602 connects to feed end 512 (refer to Fig. 5) it is also possible to described second end 602 connects (refer to figure to feed foot 512
5), described first end 601 connects to feed end 512 (refer to Fig. 5).Described match circuit 612 and match circuit 622 have respectively
There are different match circuit forms, can be single electric capacity, single inductance, the matching network of L-type, π type matching network and L
The matching network of at least one in the mixing match network of type and π type, wherein L-type, π type matching network and L-type and π type
Mixing match network in coupling device value can make electric capacity or inductance, any independent assortment.Above-mentioned so that match circuit
612 and match circuit 622 can realize the Different matching network of different frequency range, thus preferably debugging the property of each frequency range of antenna
Energy.
In other specific embodiments of the present invention, described switch module 520 can also include two or more parallel connection
On-off circuit, different on-off circuits is respectively provided with different match circuits, to correspond to different working frequency range respectively.
Described switching device can be diode, audion, field-effect transistor or IGCT, controls letter by suitable
Number, control conducting and the off-state of described switching device, thus realizing the selection of on-off circuit.By controlling each switch electricity
Lu Zhong, the turned on or off of switching device, the antenna making respectively is connected to feed end by different on-off circuits.Permissible
On each on-off circuit, separately designing different match circuits, so that each frequency range can be mated well, thus improving
The performance of described wireless communication terminal.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
Member, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be regarded as
Protection scope of the present invention.
Claims (12)
1. a kind of antenna-matching circuit is it is characterised in that include：
Antenna, described antenna has feed foot；
Switch module, described switch module is connected serially to described feed foot, and connects to feed end, and described switch module includes：Two
The on-off circuit of road more parallel, is respectively used to mate different working frequency range, and each path switching circuit all includes being connected in series
Switching device and match circuit.
2. antenna-matching circuit according to claim 1 is it is characterised in that different on-off circuit is respectively provided with different
Distribution road.
3. antenna-matching circuit according to claim 1 is it is characterised in that described match circuit includes single electric capacity, list
At least one in individual inductance, the mixing match network of the matching network of L-type, π type matching network and L-type and π type.
4. antenna-matching circuit according to claim 1 is it is characterised in that different on-off circuit adopts identical derailing switch
Part.
5. antenna-matching circuit according to claim 1 is it is characterised in that described switching device includes diode, three poles
At least one in pipe, field-effect transistor and IGCT.
6. antenna-matching circuit according to claim 1, it is characterised in that described antenna also has grounding leg, is used for connecing
Ground.
7. a kind of wireless communication terminal, including an antenna-matching circuit it is characterised in that described antenna-matching circuit includes：
Antenna, described antenna has feed foot；
Switch module, described switch module is connected serially to described feed foot, and connects to feed end, and described switch module includes：Two
The on-off circuit of road more parallel, each path switching circuit all includes switching device and the match circuit being connected in series.
8. wireless communication terminal according to claim 7 is it is characterised in that different on-off circuit is respectively provided with different
Distribution road.
9. wireless communication terminal according to claim 8 is it is characterised in that described match circuit includes single electric capacity, list
At least one in individual inductance, the mixing match network of the matching network of L-type, π type matching network and L-type and π type.
10. wireless communication terminal according to claim 7 is it is characterised in that different on-off circuit adopts identical to switch
Device.
11. wireless communication terminals according to claim 7 are it is characterised in that described switching device includes diode, three poles
At least one in pipe, field-effect transistor and IGCT.
12. wireless communication terminals according to claim 7, it is characterised in that described antenna also has grounding leg, are used for connecing
Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611021017.0A CN106384893A (en) | 2016-11-15 | 2016-11-15 | Antenna matching circuit and wireless communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611021017.0A CN106384893A (en) | 2016-11-15 | 2016-11-15 | Antenna matching circuit and wireless communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106384893A true CN106384893A (en) | 2017-02-08 |
Family
ID=57959173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611021017.0A Pending CN106384893A (en) | 2016-11-15 | 2016-11-15 | Antenna matching circuit and wireless communication terminal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107706504A (en) * | 2017-11-06 | 2018-02-16 | 深圳市信维通信股份有限公司 | A kind of mobile terminal antenna for supporting full frequency band to cover |
| CN109150206A (en) * | 2018-09-14 | 2019-01-04 | 深圳传音通讯有限公司 | Antenna-matching circuit, terminal device and impedance matching methods |
| CN110380198A (en) * | 2019-08-08 | 2019-10-25 | 维沃移动通信有限公司 | A kind of antenna modules and electronic equipment |
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| CN107706504A (en) * | 2017-11-06 | 2018-02-16 | 深圳市信维通信股份有限公司 | A kind of mobile terminal antenna for supporting full frequency band to cover |
| CN107706504B (en) * | 2017-11-06 | 2023-09-12 | 深圳市信维通信股份有限公司 | Mobile terminal antenna supporting full-band coverage |
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Application publication date: 20170208 |