CN206180116U - Antenna matching circuit and radio communication terminal - Google Patents
Antenna matching circuit and radio communication terminal Download PDFInfo
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- CN206180116U CN206180116U CN201621251636.4U CN201621251636U CN206180116U CN 206180116 U CN206180116 U CN 206180116U CN 201621251636 U CN201621251636 U CN 201621251636U CN 206180116 U CN206180116 U CN 206180116U
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Abstract
The utility model provides an antenna matching circuit and radio communication terminal, antenna matching circuit includes: the antenna, the antenna has the feed foot, the circuit comprises a switch module, switch serial module extremely the feed foot to be connected to power feeding terminal, the switch module includes: the switch circuit who connects in parallel more than two tunnel is used for respectively matcing different working frequency band, and each way switch circuit all includes the switching element and the matching circuit of series connection. Above -mentioned antenna matching circuit can improve the performance of antenna in each frequency channel.
Description
Technical field
This utility model is related to antenna technical field, more particularly to a kind of antenna-matching circuit and wireless communication terminal.
Background technology
In current various communication standards and under the situation deposited, the particularly popularization of 4G, the frequency range of operating handset is more and more,
These require that antenna is devised bigger bandwidth, to cover all conventional frequency ranges.Simultaneously as cell phone appearance is designed not
It is disconnected to incorporate new fashion and aesthetic feeling element, a large amount of utilizations of metallic element, antenna size is constantly reduced, antenna environment is more disliked
It is 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 ranges, antenna for mobile phone debugging is upper mainly to adopt two kinds of sides
Method, one is the loaded switches unit on antenna, and two is the 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 into the one of ground of antenna
Foot, then connect an electric capacity or inductance component walk different matchings and be routed to ground to ground by on-off control antenna, refer to
Fig. 1, antenna 10 is connected by grounding leg with earth terminal 11 and earth terminal 12, is connected with feed end 14 by feeding foot, will be switched
Unit 15 is connected in series on one of grounding leg, is connected with earth terminal 11, and the switch element 15 includes being connected in series to derailing switch
Part and inductively or capacitively, controls antenna and walks different matchings to be routed to ground affecting the resonance of antenna by switch element 15
Frequency is so as to realizing the switching and optimization of antenna different frequency range；Fig. 2 is refer to, another kind of implementation method is then by switch element 21
It is connected in series on antenna 10 on the grounding leg of diverse location, is connected with earth terminal 20, antenna is controlled by switching and walks different connecing
Ground path so need not still further connect the switching and optimization that affect the resonant frequency of antenna so as to realize different frequency
Capacitor and inductor device.
The method of loading tunable capacitor equally also has two kinds of implementations：Fig. 3 is refer to, one is the feed foot in antenna 10
One tunable capacitor 30 of upper series connection, is connected with feed end 14, is obtained by changing the bias voltage size on tunable capacitor 30
Realize the different capacitance of antenna in series to different size of capacitance, and then realize the switching of antenna each frequency range and excellent
Change；Fig. 4 is refer to, two is to load tunable capacitor 40 on the grounding leg of antenna 10 to be connected to earth terminal, by different biasings
Voltage obtains different capacitances, make antenna ground foot connect different electric capacity to realizing 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 antenna is lifted, also had
Larger limitation, performance need further raising.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of antenna-matching circuit and wireless communication terminal,
Improve the performance of the antenna-matching circuit and wireless communication terminal.
To solve the above problems, the utility model proposes a kind of antenna-matching circuit, including：Antenna, the antenna has
Feed foot；Switch module, the switch module is connected serially to the feed foot, and is connected to feed end, and the switch module includes：
The on-off circuit of two-way more parallel, is respectively used to match different working frequency range, and each path switching circuit includes that series connection connects
The switching device for connecing and match circuit.
Optionally, different on-off circuits have respectively different match circuits.
Optionally, the match circuit include single electric capacity, single inductance, the matching network of L-type, π type matching networks, with
And at least one in the mixing match network of L-type and π types.
Optionally, different on-off circuits adopt identical switching device.
Optionally, the switching device includes at least in diode, audion, field-effect transistor and IGCT
Kind.
Optionally, the antenna also has grounding leg, for being grounded.
To solve the above problems, this utility model also provides a kind of wireless communication terminal, including an antenna-matching circuit, its
It is characterised by, the antenna-matching circuit includes：Antenna, the antenna has feed foot；Switch module, the switch module string
The feed foot is coupled to, and is connected to feed end, the switch module includes：The on-off circuit of two-way more parallel, per all the way
On-off circuit includes switching device and the match circuit being connected in series.
Optionally, different on-off circuits have respectively different match circuits.
Optionally, the match circuit include single electric capacity, single inductance, the matching network of L-type, π type matching networks, with
And at least one in the mixing match network of L-type and π types.
Optionally, different on-off circuits adopt identical switching device.
Optionally, the switching device includes at least in diode, audion, field-effect transistor and IGCT
Kind.
Optionally, the antenna also has grounding leg, for being grounded.
In the feed foot tandem tap module of antenna, the switch module includes many antenna-matching circuit of the present utility model
Individual on-off circuit in parallel, corresponds to respectively different working frequency range, and the on-off circuit includes the switching device of series connection and matching
Circuit, by controlling each on-off circuit in, the turned on or off of switching device, the antenna for making respectively is opened by different
Powered-down road is connected to feed end.On each on-off circuit, different match circuits are respectively equipped with, each frequency range is obtained
Matching well.Compared with prior art, the antenna-matching circuit is more widely applied, and cost is lower.
Wireless communication terminal of the present utility model has above-mentioned antenna-matching circuit, so as to have more preferable radio communication
Energy.
Description of the drawings
Fig. 1 is the structural representation of the antenna-matching circuit of prior art of the present utility model；
Fig. 2 is the structural representation of the antenna-matching circuit of prior art of the present utility model；
Fig. 3 is the structural representation of the antenna-matching circuit of prior art of the present utility model；
Fig. 4 is the structural representation of the antenna-matching circuit of prior art of the present utility model；
Fig. 5 is the structural representation of the antenna-matching circuit of the specific embodiment of this utility model one；
Fig. 6 is the structural representation of the switch module of the antenna-matching circuit of the specific embodiment of this utility model one.
Specific embodiment
As stated in the Background Art, switching device is connected in series to ground by the scheme of switch loading due to needing, so requiring day
The form that line must have grounding leg, such antenna can only just be confined to PIFA or IFA forms, for no grounding leg
Monopole antennas, 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 in itself capacitive, can only just do electric capacity tune
It is humorous, then less it is suitable for when antenna impedance itself is in just capacitive；On the other hand, because tunable capacitor device ratio itself is opened
Device is closed expensive, so can also bring on cost than switching device further increasing.
The antenna-matching circuit and wireless communication terminal for providing this utility model below in conjunction with the accompanying drawings is embodied as
Mode elaborates.
Fig. 5 is refer to, is the structural representation of the antenna-matching circuit of the specific embodiment of this utility model one.
The antenna-matching circuit includes：Antenna 510, the antenna has feed foot 511；Switch module 520, it is described to open
Close module 520 and be connected serially to the feed foot 511, and be connected to feed end 512.
The feed foot 511 of the antenna 510 is used to be connected to feed end 512, and the feed end 512 is the end of holding wire
Mouthful, as signal input or output port.The switch module 520 is used in different frequency range, impedance of antenna etc. is carried out
Match somebody with somebody, make antenna 510 that there is suitable resonant frequency in each working frequency range, so that the performance on different frequency bands of antenna 510
More optimize.
In specific embodiment of the present utility model, the antenna 510 can be one pole (monopole) antenna, not have
Grounding leg.In other specific embodiments of the present utility model, the antenna 510 can also be PIFA (plane inverse F type) day
Line or IFA (reversed F-typed) antenna, not only with feed foot, also with grounding leg.In this embodiment, the day
Line 510 also has grounding leg 513, for connecting ground terminal 514, to be grounded.
In specific embodiment of the present utility model, the switch module includes：The on-off circuit of two-way more parallel,
Each path switching circuit includes switching device and the match circuit being connected in series.
Fig. 6 is refer to, is that the concrete structure of the switch module 520 of a specific embodiment of the present utility model is illustrated
Figure.The switch module 520 includes double switch circuit, respectively on-off circuit 610 and on-off circuit 620, the switch electricity
Road 610 includes switching device 611 and match circuit 612；The on-off circuit 620 includes switching device 621 and match circuit
622.The on-off circuit 610 and on-off circuit 620 are connected in parallel to the end 602 of the first end 601 and second, and described first
End 601 is connected to feed foot 511 (refer to Fig. 5), and second end 602 is connected to feed end 512 (refer to Fig. 5), also may be used
Feed foot 512 (refer to Fig. 5) is connected to second end 602, the first end 601 is connected to feed end 512 and (refer to
Fig. 5).
The match circuit 612 and match circuit 622 have respectively different match circuit forms, can be single electricity
At least one in the mixing match network of appearance, single inductance, the matching network of L-type, π types matching network and L-type and π types,
Matching device value wherein in the mixing match network of the matching network of L-type, π types matching network and L-type and π types can make
Electric capacity or inductance, any independent assortment.It is above-mentioned so that match circuit 612 and match circuit 622 can realize different frequency range
Different matching network, so as to 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, can be with
For diode, audion, field-effect transistor or IGCT etc., in this embodiment, the switching device 611 and open
Pass device 621 is simple single-pole single-throw switch (SPST).In other specific embodiments of the present utility model, the switching device can
Think diode, audion, field-effect transistor or IGCT, by suitable control signal, control the switching device
Conducting and off-state, so as to realize the selection of on-off circuit.For example, in this embodiment, the switching device 611
Disconnect, the switching device 621 is turned on, and the on-off circuit 620 between the end 602 of the first end 601 and second is turned on, described
With circuit 622 as the match circuit between antenna feed foot 511 and feed end 512, such that it is able to pass through the match circuit
622 pairs of antennas are debugged.The on-off circuit 610 and on-off circuit 620 respectively correspond to different frequency range, such as GSM900 and
GSM1800, so as to be respectively directed to different frequency range, is debugged, to carry by match circuit 612 and match circuit 622 to antenna
Service behaviour of the high antenna in each frequency range.
In other specific embodiments of the present utility model, the switch module 520 can also include two or more simultaneously
The on-off circuit of connection, such as 3,4,5,6 etc., different on-off circuits have respectively different match circuits, to divide
Working frequency range that Dui Ying be not different.In by controlling each on-off circuit, the turned on or off of switching device make respectively
Antenna 510 is connected to feed end 512 by different on-off circuits.Can be respectively provided with different on each on-off circuit
Match circuit, makes each frequency range to be matched well.
Because the switch module 520 is connected on feed foot 511, application is relatively broad, it is adaptable to all types of
Antenna.Also, the match circuit on each on-off circuit is also not limited to be connected in series to the sole mode on ground, and can be to set
The network of any formation is counted into, any capacitor and inductor device can be used, also, the on-off circuit is more cheap than tunable capacitor
It is many, so having significant cost advantage.
Specific embodiment of the present utility model also provides a kind of wireless communication terminal.
The wireless communication terminal includes antenna-matching circuit as shown in Figure 5, and the antenna-matching circuit includes：Antenna
510, the antenna 510 has feed foot 511；Switch module 520, the switch module 520 is connected serially to the feed foot 511,
And feed end 512 is connected to, the switch module 520 includes：The on-off circuit of two-way more parallel, each path switching circuit is equal
Including the switching device and match circuit that are connected in series.In this embodiment, the 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.The switch module 520 includes double switch circuit, point
Not Wei on-off circuit 610 and on-off circuit 620, the on-off circuit 610 includes switching device 611 and match circuit 612；It is described
On-off circuit 620 includes switching device 621 and match circuit 622.The on-off circuit 610 and on-off circuit 620 are connected in parallel
To the end 602 of the first end 601 and second, the first end 601 is connected to and feeds foot 511 (refer to Fig. 5), and described second
End 602 is connected to feed end 512 (refer to Fig. 5), it is also possible to which second end 602 is connected to feed foot 512 and (refer to figure
5), the first end 601 is connected to feed end 512 (refer to Fig. 5).The 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 types matching network and L
The matching network of at least one in the mixing match network of type and π types, wherein L-type, π types matching network and L-type and π types
Mixing match network in matching device value can make electric capacity or inductance, any independent assortment.It is above-mentioned so that match circuit
612 and match circuit 622 can realize the Different matching network of different frequency range, so as to preferably debug the property of each frequency range of antenna
Energy.
In other specific embodiments of the present utility model, the switch module 520 can also include two or more simultaneously
The on-off circuit of connection, different on-off circuits have respectively different match circuits, to correspond to different working frequency range respectively.
The switching device can be diode, audion, field-effect transistor or IGCT, be believed by suitable control
Number, conducting and the off-state of the switching device are controlled, so as to realize the selection of on-off circuit.By controlling each switch electricity
Lu Zhong, the turned on or off of switching device, the antenna for making respectively is connected to feed end by different on-off circuits.Can be with
On each on-off circuit, different match circuits are separately designed, each frequency range is matched well, so as to improve
The performance of the wireless communication terminal.
The above is only preferred implementation of the present utility model, it is noted that for the common skill of the art
Art personnel, on the premise of without departing from this utility model principle, can also make some improvements and modifications, these improvements and modifications
Also should be regarded as protection domain of the present utility model.
Claims (12)
1. a kind of antenna-matching circuit, it is characterised in that include：
Antenna, the antenna has feed foot；
Switch module, the switch module is connected serially to the feed foot, and is connected to feed end, and the switch module includes：Two
The on-off circuit of road more parallel, is respectively used to match different working frequency range, and each path switching circuit includes being connected in series
Switching device and match circuit.
2. antenna-matching circuit according to claim 1, it is characterised in that different on-off circuits have respectively different
With circuit.
3. antenna-matching circuit according to claim 1, it is characterised in that the match circuit includes single electric capacity, list
At least one in individual inductance, the matching network of L-type, the mixing match network of π types matching network and L-type and π types.
4. antenna-matching circuit according to claim 1, it is characterised in that different on-off circuits adopt identical derailing switch
Part.
5. antenna-matching circuit according to claim 1, it is characterised in that the 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 the antenna also has grounding leg, for connecing
Ground.
7. a kind of wireless communication terminal, an including antenna-matching circuit, it is characterised in that the antenna-matching circuit includes：
Antenna, the antenna has feed foot；
Switch module, the switch module is connected serially to the feed foot, and is connected to feed end, and the switch module includes：Two
The on-off circuit of road more parallel, each path switching circuit includes switching device and the match circuit being connected in series.
8. wireless communication terminal according to claim 7, it is characterised in that different on-off circuits have respectively different
With circuit.
9. wireless communication terminal according to claim 8, it is characterised in that the match circuit includes single electric capacity, list
At least one in individual inductance, the matching network of L-type, the mixing match network of π types matching network and L-type and π types.
10. wireless communication terminal according to claim 7, it is characterised in that different on-off circuits are switched using identical
Device.
11. wireless communication terminals according to claim 7, it is characterised in that the 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 the antenna also has grounding leg, for connecing
Ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621251636.4U CN206180116U (en) | 2016-11-15 | 2016-11-15 | Antenna matching circuit and radio communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621251636.4U CN206180116U (en) | 2016-11-15 | 2016-11-15 | Antenna matching circuit and radio communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206180116U true CN206180116U (en) | 2017-05-17 |
Family
ID=58686638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621251636.4U Active CN206180116U (en) | 2016-11-15 | 2016-11-15 | Antenna matching circuit and radio communication terminal |
Country Status (1)
| Country | Link |
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| CN (1) | CN206180116U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181065A (en) * | 2017-05-27 | 2017-09-19 | 深圳市德卡科技股份有限公司 | It is non-to connect IC-card read-write equipment antenna |
| CN107645055A (en) * | 2017-08-28 | 2018-01-30 | 维沃移动通信有限公司 | A kind of antenna system and mobile terminal |
| 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 |
| CN113675592A (en) * | 2020-05-13 | 2021-11-19 | 北京小米移动软件有限公司 | Antenna module and terminal equipment |
-
2016
- 2016-11-15 CN CN201621251636.4U patent/CN206180116U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181065A (en) * | 2017-05-27 | 2017-09-19 | 深圳市德卡科技股份有限公司 | It is non-to connect IC-card read-write equipment antenna |
| CN107645055A (en) * | 2017-08-28 | 2018-01-30 | 维沃移动通信有限公司 | A kind of antenna system and mobile terminal |
| 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 |
| CN113675592A (en) * | 2020-05-13 | 2021-11-19 | 北京小米移动软件有限公司 | Antenna module and terminal equipment |
| CN113675592B (en) * | 2020-05-13 | 2023-08-04 | 北京小米移动软件有限公司 | Antenna module and terminal equipment |
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