CN108111180A - Tuning switch control circuit, antenna assembly and mobile terminal - Google Patents
Tuning switch control circuit, antenna assembly and mobile terminal Download PDFInfo
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- CN108111180A CN108111180A CN201711342027.9A CN201711342027A CN108111180A CN 108111180 A CN108111180 A CN 108111180A CN 201711342027 A CN201711342027 A CN 201711342027A CN 108111180 A CN108111180 A CN 108111180A
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- 238000010295 mobile communication Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 abstract description 27
- 239000006185 dispersion Substances 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 14
- 239000004065 semiconductor Substances 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Transceivers (AREA)
Abstract
A kind of tuning switch control circuit, antenna assembly and mobile terminal, the tuning switch control circuit include antenna, the first match circuit, the first tuning switch, RF signal transmitter and controller；Antenna includes antenna radiator, the first distributing point, first match circuit includes M matching sub-circuit, first tuning switch includes M switch ways, first matching sub-circuit is any one in M matching sub-circuit, first switch access is one corresponding with the first matching sub-circuit in M switch ways, the first end of first matching sub-circuit connects the first distributing point, the first end of the second end connection first switch access of the first matching sub-circuit, the second end ground connection of first switch access；First control terminal of controller connects the control terminal of the first tuning switch；Controller is at least one switch ways conducting in the M switch ways of control when Antenna Operation is in low frequency mode.The embodiment of the present invention can improve the harmonic excess of radiation dispersion.
Description
Technical field
The present invention relates to field of terminal technology, and in particular to a kind of tuning switch control circuit, antenna assembly and movement
Terminal.
Background technology
For the mobile terminals such as mobile phone, radiation dispersion is as its forcible authentication index, and certification difficulty is larger, and becoming needs
The problem to be solved.For global system for mobile communications (Global System for Mobile communication, GSM)
For the radiofrequency signal of frequency range, radiofrequency signal can not only include available signal (GSM900), and second harmonic can be included toward contact
It, will be by these harmonic wave energy at the resonance of the harmonic energy arrival antenna of radiofrequency signal with these garbage signals of triple-frequency harmonics
Amount is radiate, exceeded so as to cause radiation dispersion.
At present, for GSM frequency ranges, since the power of frequency range in itself is higher, it is easy to excited in moment stronger energy from
And cause the harmonic excess of radiation dispersion.
The content of the invention
It, can be to avoid an embodiment of the present invention provides a kind of tuning switch control circuit, antenna assembly and mobile terminal
Caused by antenna tuning switch the problem of radiation dispersion.
First aspect of the embodiment of the present invention provides a kind of tuning switch control circuit, including antenna, the first match circuit, the
One tuning switch, RF signal transmitter and controller；
The antenna includes antenna radiator, the first distributing point, and first match circuit includes M matching sub-circuit,
First tuning switch includes M switch ways, and the M matching sub-circuit is corresponded with the M switch ways, the
One matching sub-circuit for described M match sub-circuit in any one, first switch access in the M switch ways with institute
The corresponding switch ways of the first matching sub-circuit are stated, M is positive integer；
First distributing point connects the signal output part of the RF signal transmitter, the first matching sub-circuit
First end connects first distributing point, and the second end of the first matching sub-circuit connects the first of the first switch access
End, the second end ground connection of the first switch access；
The controller includes the first control terminal, and first control terminal connects the control terminal of first tuning switch；
The controller is used to that at least one switch in the M switch ways to be controlled to lead to when the Antenna Operation is in low frequency mode
Road turns on.
Second aspect of the embodiment of the present invention provides a kind of antenna assembly, which includes power amplifier and this hair
The tuning switch control circuit of bright embodiment first aspect.
The third aspect of the embodiment of the present invention provides a kind of mobile terminal, including terminal body and the embodiment of the present invention second
The antenna assembly of aspect.
When Antenna Operation is in low frequency mode, since the electrical length of antenna radiator is just met for Antenna Operation in Low-frequency Modes
Working frequency under formula, therefore the working frequency of antenna need not be adjusted using the first tuning switch, by the first tuning switch
M switch ways it is all off, however, this M switch ways disconnect when be equivalent to M capacitance, RF signal transmitter
Signal output part output radiofrequency signal in high-frequency harmonic energy can be accumulated at above-mentioned M capacitance, due to Antenna Operation
In low frequency mode, the power of RF signal transmitter is higher, it is easy to inspire stronger energy in the first distributing point moment
So as to cause the harmonic excess of radiation dispersion.The embodiment of the present invention is controlled when Antenna Operation is in low frequency mode by controller
At least one switch ways conducting in the M switch ways, the high-frequency harmonic energy that can will be accumulated at above-mentioned M capacitance
It eliminates, so as to improve the harmonic excess of radiation dispersion.
Description of the drawings
It in order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structure diagram of tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 2 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 3 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 4 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 5 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 6 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 7 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 8 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention；
Fig. 9 is a kind of structure diagram of antenna assembly disclosed by the embodiments of the present invention；
Figure 10 is a kind of structure diagram of mobile terminal disclosed by the embodiments of the present invention.
Specific embodiment
In order to which those skilled in the art is made to more fully understand the present invention program, below in conjunction in the embodiment of the present invention
The technical solution in the embodiment of the present invention is clearly and completely described in attached drawing, it is clear that described embodiment is only
Part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
All other embodiments obtained without creative efforts belong to the scope of protection of the invention.
Term " first ", " second " in description and claims of this specification and above-mentioned attached drawing etc. are for distinguishing
Different objects rather than for describing particular order.In addition, term " comprising " and " having " and their any deformations, it is intended that
It is to cover non-exclusive include.Such as it contains process, system, product or the equipment of series of steps or unit and does not limit
In listed the step of or unit, but optionally further include the step of not listing or unit or optionally further include for
Other intrinsic steps of these processes, product or equipment or unit.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
In addition, the mobile terminal involved by the embodiment of the present invention can include various holding with wireless communication function
Equipment, mobile unit, wearable device, computing device are connected to other processing equipments of radio modem and each
The user equipment (User Equipment, UE) of kind form, mobile station (Mobile Station, MS), terminal device
(terminal device) etc..For convenience of description, apparatus mentioned above is referred to as mobile terminal.
It describes in detail below to the embodiment of the present invention.
Referring to Fig. 1, Fig. 1 is a kind of structure diagram of tuning switch control circuit disclosed by the embodiments of the present invention, such as
Shown in Fig. 1, which includes antenna 11, the first match circuit 12, the first tuning switch 13, radiofrequency signal hair
Emitter 14 and controller 15.
Antenna 11 includes antenna radiator 111, the first distributing point 112, and the first match circuit 12 includes M matching sub-circuit
(it is as shown in Figure 1 121,122 ... 12M), the first tuning switch 13 include M switch ways (as shown in Figure 1 131,
132nd ... 13M), M matching sub-circuit corresponded with M switch ways (as shown in Figure 1,121 and 131 is corresponding, 122 and
132 correspondences ... 12M is corresponding with 13M), first matches sub-circuit 121 as any one in M matching sub-circuit, first switch
Access 131 is, with first matching 121 corresponding switch ways of sub-circuit, M is positive integer in M switch ways.
First distributing point 112 connects the signal output part 141 of RF signal transmitter 14, the first matching sub-circuit 121
First end 1211 connects the first distributing point 112, and the second end 1212 of the first matching sub-circuit 121 connects first switch access 131
First end 1311, the second end 1312 of first switch access 131 is grounded；
Controller 15 includes the first control terminal 151, and the first control terminal 151 connects the control terminal 130 of the first tuning switch 13；
Controller 15 is at least one switch ways conducting in the M switch ways of control when antenna 11 is operated in low frequency mode.
It is suitable for global system for mobile communications (Global System for Mobile in the embodiment of the present invention
Communication, GSM) frequency range, GSM frequency ranges can include low frequency band (900MHz frequency ranges) and high-frequency band (1800MHz
Frequency range).When antenna 11 is operated in low frequency mode, the low frequency signal of antenna radiator radiation 900MHz or so；When 11 work of antenna
Make in high frequency mode, the high-frequency signal of antenna radiator radiation 1800MHz or so.
Antenna 11 in the embodiment of the present invention is excited using electric field, when antenna 11 works as transmitting antenna, first
Distributing point 112 is by loading high voltage (for example, 60 volts -100 volts) come 111 radiation energy of excitation antenna radiator, antenna
11 receive the high frequency electric of the transmission of RF signal transmitter 14 by the first distributing point 112.According to electromagnetic induction principle, high-frequency electrical
Stream, which flows through antenna radiator 111, can generate magnetic field, so that antenna radiator 111 gives off energy in the form of an electromagnetic wave
It goes.
RF signal transmitter 14 can be located on mainboard, the signal of the first distributing point 112 and RF signal transmitter 14
Output terminal 141 connects, the radiofrequency signal (radio frequency that the first distributing point 112 sends over for reception from RF signal transmitter 14
Signal can be the high frequency oscillating current signal through ovennodulation), radiofrequency signal is after antenna radiator 111, antenna radiator
111 radiate energy in the form of an electromagnetic wave.
Radiofrequency signal can include high frequency radio signals and/or low frequency radio frequency signal.When antenna 11 is used as transmitting antenna work
Make in low frequency mode, RF signal transmitter 14 itself should only emit specific low frequency radio frequency signal, however, due to radio frequency
The internal component of signal projector 14 is not ideal component, there are more or less nonlinear device, in transmitting radiofrequency signal
During, the signal in the range of many non-assigned frequencies is generated, that is, stray radiation has occurred.Wherein, non-assigned frequency model
Signal in enclosing is generally the high-frequency harmonics such as second harmonic, triple-frequency harmonics.Since above-mentioned high-frequency harmonic is RF signal transmitter
14 are not desired to transmitting in itself, therefore need to reduce the radiation dispersion brought by above-mentioned high-frequency harmonic.
When antenna 11 as transmitting antenna be operated in low frequency mode when, in order to ensure radiation efficiency, it is necessary to aerial radiation
The electrical length of body is longer.Therefore using the entire antenna radiator 111 of antenna 11 as the electrical length under low frequency mode.Therefore, antenna
When 11 conduct transmitting antennas are operated in low frequency mode, electrical length need not be adjusted, the first distributing point 112 need not access any
With circuit, it is therefore desirable to which M switch ways for including the first tuning switch 13 turn off.Since the first distributing point 112 has high pressure
Presence, this M switch ways be equivalent to M capacitance in parallel when disconnecting, and it is a that the first end of this M capacitance connects M respectively
Match sub-circuit, the second end ground connection of this M capacitance.The radio frequency letter that the signal output part 141 of RF signal transmitter 14 exports
High-frequency harmonic energy in number can be accumulated in the first end of above-mentioned M capacitance, since antenna 11 is excited using electric field, and this
The voltage difference at M capacitance both ends is larger, and high voltage differential can inspire non-linear in the first match circuit 12, bring radiation dispersion
Risk.
The embodiment of the present invention is used to control when antenna 11 is operated in low frequency mode by adding in controller 15, controller 15
At least one switch ways conducting in M switch ways, is equivalent to the quantity for reducing capacitance in parallel, reduces capacitance effect
Should, the high-frequency harmonic that at least one switch ways conducting in M switch ways can accumulate the first end of above-mentioned M capacitance
Energy eliminates, so as to improve the harmonic excess of radiation dispersion.
Wherein, controller 15 can be debugged in advance, and the conducting of one or more of M switch ways is come test days
The fluctuation situation of the working frequency of line 11 and the performance change of radiation dispersion, select on the basis of radiation dispersion best performance
The switch conduction way of the working frequency fluctuation minimum of antenna 11.For example, it is assumed that M=3, a total of switch ways 1, switch ways
2 and switch ways 3, it can select to test the fluctuation of the working frequency of antenna 11 in the case where switch ways 1,2 turn on, open
It closes the fluctuation for the working frequency that antenna 11 is tested in the case that access 2,3 turns on, surveyed in the case where switch ways 1,2,3 turn on
The fluctuation of the working frequency of antenna 11 is tried, if testing the working frequency of antenna 11 in the case where switch ways 1,2,3 turn on
Fluctuation, then controller 15 when antenna 11 is operated in low frequency mode all switch ways in 3 switch ways is controlled all to lead
It is logical.
Optionally, referring to Fig. 2, Fig. 2 on the basis of Fig. 1 further optimization obtain, as shown in Fig. 2, tuning open
It closes control circuit and further includes inductance tuning access 23, the first end 231 of inductance tuning access 23 connects the first distributing point 112, electricity
The second end 232 of sense tuning access 23 is grounded；Controller 15 is additionally operable to control inductance tune when antenna 11 is operated in low frequency mode
Humorous access 23 turns on, and controller 15 is additionally operable to that inductance tuning access 23 is controlled to turn off when antenna 11 is operated in high frequency mode.
Wherein, inductance tuning access 23 can include at least one inductance, when antenna 11 is operated in low frequency mode, by electricity
When sense tuning access 23 turns on, it is equivalent to and eliminates the high-frequency harmonic energy of the first end accumulation of above-mentioned M capacitance, so as to
Further improve the harmonic excess of radiation dispersion.
When antenna 11 is operated in high frequency mode, in order to avoid inductance tunes shadow of the inductance in access 23 to high frequency mode
It rings, controller 15 is additionally operable to that inductance tuning access 23 is controlled to turn off when antenna 11 is operated in high frequency mode.
Optionally, referring to Fig. 3, Fig. 3 on the basis of Fig. 2 further optimization obtain, as shown in figure 3, controller
15 further include the second control terminal 152, and inductance tuning access 23 includes the first tuning coil L1 and the first inductance switch T1, the second control
End 152 processed connects the control terminal 2341 of the first inductance switch T1.First feed of the connection of first end 2331 of first tuning coil L1
Point 112, the second end 2332 of the first tuning coil L1 connect the first end 2342 of the first inductance switch T1, the first inductance switch T1
Second end 2343 be grounded.
Optionally, the first end 2342 of the first inductance switch T1 connects the first distributing point 112, and the of the first inductance switch T1
Two ends 2343 connect the first end 2331 of the first tuning coil L1, and the second end 2332 of the first tuning coil L1 is grounded.
In the embodiment of the present invention, the first tuning coil L1 and the first inductance switch T1 are series relationships, the first tuning coil
L1 is grounded by the first inductance switch T1 or the first inductance switch T1 is grounded by the first tuning coil L1.Wherein, first adjust
Humorous inductance L1 can include an inductance, can also include multiple inductance in parallel or connect including multiple inductance.First inductance
Switch T1 can be metal-oxide-semiconductor (metal oxide semiconductor, MOS) field-effect transistor,
The semiconductor switch such as insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT), triode
Any one of pipe.The first inductance switch T1 in Fig. 3 is using metal-oxide-semiconductor as example.
For example, if the first inductance switch T1 is NMOS tube, when antenna 11 is operated in low frequency mode, controller 15
Second control terminal 152 sends high level signal (for example, level value is 4V) to the control terminal 2341 of the first inductance switch T1, with control
Inductance tuning access 23 processed turns on；When antenna 11 is operated in high frequency mode, the second control terminal 152 of controller 15 is electric to first
The control terminal 2341 of sense switch T1 sends low level signal (for example, level value is 0V), inductance tuning access 23 to be controlled to turn off.
If the first inductance switch T1 is PMOS tube, when antenna 11 is operated in low frequency mode, the second control of controller 15
End 152 sends low level signal (for example, level value is 0V) to the control terminal 2341 of the first inductance switch T1, to control inductance tune
Humorous access 23 turns on；When antenna 11 is operated in high frequency mode, the second control terminal 152 of controller 15 is to the first inductance switch T1
Control terminal 2341 send high level signal (for example, level value be 4V), inductance tuning access 23 to be controlled to turn off.
Optionally, referring to Fig. 4, Fig. 4 on the basis of Fig. 1 further optimization obtain, as shown in figure 4, tuning open
It closes control circuit and further includes the first tuning coil module 16, first matching of the connection of first end 161 of the first tuning coil module 16
The second end 1212 of sub-circuit 121, the second end 162 of the first tuning coil module 16 are grounded.
The embodiment of the present invention is equivalent on the basis of above-mentioned M capacitance in parallel by adding in the first tuning coil module 16
Inductance, the high-frequency harmonic energy that can will be accumulated at above-mentioned M capacitance eliminate, and avoiding can when the first tuning switch 13 disconnects
The radiation dispersion problem for the high-frequency harmonic that can occur, so as to improve the harmonic excess of radiation dispersion.
Wherein, the first tuning coil module 16 can include an inductance, can also include the inductance of multiple parallel connections, also may be used
To include the inductance of multiple series connection, multiple inductance can also be included in parallel and serial.The second of first tuning coil module 16
End ground connection, the voltage of accumulation at above-mentioned M capacitance can be pulled to ground terminal by the first tuning coil module 16, so as to by radio frequency
The high-frequency harmonic energy being accumulated at M capacitance in the radiofrequency signal that the signal output part 141 of signal projector 14 exports disappears
It removes, so as to improve the harmonic excess of radiation dispersion.Meanwhile first tuning coil module 16 can also be with above-mentioned M capacitance
Generate resonance, the frequency of resonance is equivalent to the effect of disconnection for low frequency signal, does not interfere with low frequency signal in itself
Radiation efficiency.
Optionally, referring to Fig. 5, Fig. 5 on the basis of Fig. 4 further optimization obtain, as shown in figure 5, controller
15 further include the 3rd control terminal 153, and the first tuning coil module 16 includes second tune inductance L2 and the second inductance switch T2, the
Three control terminals 153 connect the control terminal 1621 of the second inductance switch T2.The connection of first end 1,611 first of second tune inductance L2
The second end 1212 of sub-circuit 121 is matched, the second end of second tune inductance L2 connects the first of 1,612 second inductance switch T2
End 1622, the second end 1623 of the second inductance switch T2 is grounded.
Optionally, the second end 1212 of the connection of the first end 1,622 first matching sub-circuit 121 of the second inductance switch T2, the
The second end 1623 of two inductance switch T2 connects the first end 1611 of second tune inductance L2, the second end of second tune inductance L2
1612 ground connection.
In the embodiment of the present invention, second tune inductance L2 and the second inductance switch T2 are series relationships, second tune inductance
L2 is grounded by the second inductance switch T2 or the second inductance switch T2 is grounded by second tune inductance L2.Wherein, second adjust
Humorous inductance L2 can include an inductance, can also include multiple inductance in parallel or connect including multiple inductance.Second inductance
Switching T2 can be with any one of semiconductor switch pipe such as MOS field-effect transistors, exhausted IGBT, triode.The second electricity in Fig. 5
Sense switch T2 is using metal-oxide-semiconductor as example.
For example, if the second inductance switch T2 is NMOS tube, when antenna 11 is operated in low frequency mode, controller 15
3rd control terminal 153 sends high level signal (for example, level value is 4V) to the control terminal 1621 of the second inductance switch T2, with control
Make the second inductance switch T2 conductings；When antenna 11 is operated in high frequency mode, the 3rd control terminal 153 of controller 15 is electric to second
The control terminal 1621 of sense switch T2 sends low level signal (for example, level value is 0V), to control the second inductance switch T2 shut-offs.
If the second inductance switch T2 is PMOS tube, when antenna 11 is operated in low frequency mode, the 3rd control of controller 15
End 153 sends low level signal (for example, level value is 0V) to the control terminal 1621 of the second inductance switch T2, with the second electricity of control
Sense switch T2 conductings；When antenna 11 is operated in high frequency mode, the 3rd control terminal 153 of controller 15 is to the second inductance switch T2
Control terminal 1621 send high level signal (for example, level value be 4V), to control the second inductance switch T2 shut-offs.
Referring to Fig. 6, Fig. 6 is the structure diagram of another tuning switch control circuit disclosed by the embodiments of the present invention,
Fig. 6 is that further optimization obtains on the basis of above-mentioned Fig. 1, as shown in fig. 6, tuning switch control circuit further includes the second feed
The 113, second match circuit 17 of point and second tune switch 18；
Second match circuit 17 include N number of matching sub-circuit (it is as shown in Figure 3 171,172 ... 17N), second tune is opened
Close 18 include N number of switch ways (it is as shown in Figure 3 181,182 ... 18N), N number of matching sub-circuit with N number of switch ways one by one
Corresponding, the second matching sub-circuit 171 is any one in N number of matching sub-circuit, and second switch access 181 is N number of switch ways
In with second matching 171 corresponding switch ways of sub-circuit, N is positive integer；
The first end 1711 of second matching sub-circuit 171 connects the second distributing point 113, and the of the second matching sub-circuit 171
The first end 1811 of two ends 1712 connection second switch access 181, the second end 1812 of second switch access 181 are grounded.
Wherein, the second distributing point 113 and the first distributing point 112 are located at the different position of antenna, the second distributing point 113 and
The distance between one distributing point 112 is less than the length of antenna radiator 111.Second distributing point 113 is mainly used for adjusting antenna 11
Electrical length under high frequency mode, to change the working frequency of antenna 11.Wherein, when antenna 11 is worked under high frequency mode, day
The electrical length of line is：One section of radiator in antenna radiator 111 between the second distributing point 113 and the first distributing point 112.
When antenna 11 is worked under low frequency mode, the electrical length of antenna 11 is the length of entire antenna radiator 111.
When antenna 11 works under high frequency mode, second tune switch 18 is used cooperatively with the first tuning switch 13, with
Realize the accurate adjusting of the working frequency to the high-frequency signal of antenna 11.
Optionally, as shown in fig. 6, controller 15 further includes the 4th control terminal 154, the 4th control terminal 154 connection second is adjusted
The control terminal 180 of humorous switch 18；
When antenna 11 is operated in low frequency mode, controller 15 controls N number of switch ways of second tune switch 18 whole
It disconnects.
When antenna 11 works under low frequency mode, such as when being operated in 900MHz, without adjusting the work frequency of antenna 11
Rate.Second distributing point 113 need not access any match circuit, it is therefore desirable to by N number of switch ways of second tune switch 18
It is all off.The low frequency operating frequency of antenna 11 is interfered after avoiding 18 conducting of second tune switch.
Optionally, when antenna 11 is operated in high frequency mode, controller 15 controls N number of switch of second tune switch 18 to lead to
At least one switch ways conducting in road.
It, can be by adjusting N when at least one switch ways conducting in N number of switch ways of second tune switch 18
Which or which way switch access in a switch ways turns on to adjust the working frequency of antenna 11 under high frequency mode.
Optionally, when in N number of switch ways at least one switch ways conducting when, in N number of switch ways at least
At least one matching sub-circuit of one switch ways connection is used to adjust the impedance of antenna.
When at least one switch ways conducting in N number of switch ways of second tune switch 18, with N number of switch ways
In at least one switch ways connection at least one matching sub-circuit access antenna radiator 111, at least one matching
Sub-circuit can adjust the impedance of antenna 11 so that and the impedance of antenna 11 is matched with accessing the feed line impedance of the first distributing point 112,
So that tuning switch control circuit is operated in impedance matching condition.Matching sub-circuit can not only adjust antenna 11 in high frequency mode
Under working frequency, the work of tuning switch control circuit can also be adjusted in impedance matching condition.Wherein, matching sub-circuit can
To form π type match circuits by an inductance and two capacitances.
Optionally, referring to Fig. 7, Fig. 7 on the basis of Fig. 6 further optimization obtain, such as Fig. 7, tuning switch control
Circuit processed further includes second tune inductor module 19, the connection of the first end 191 second matching son electricity of second tune inductor module 19
The second end 1712 on road 171, the second end 192 of second tune inductor module 19 are grounded.
Since the first distributing point 112 has the presence of high pressure, this N number of switch ways is equivalent to N number of capacitance, antenna when disconnecting
11 when being in low frequency operating mode, the harmonic high frequency in the radiofrequency signal that the signal output part 141 of RF signal transmitter 14 exports
Wave energy can be accumulated in the first end of above-mentioned N number of capacitance, the second end ground connection of above-mentioned N number of capacitance.
The embodiment of the present invention is equivalent on the basis of above-mentioned N number of capacitance in parallel by adding in second tune inductor module 19
Inductance, the high-frequency harmonic energy that can will be accumulated at above-mentioned N number of capacitance eliminate, and avoiding can when second tune switch 18 disconnects
The radiation dispersion problem for the high-frequency harmonic that can occur, so as to improve the harmonic excess of radiation dispersion.
Optionally, referring to Fig. 8, Fig. 7 further optimization obtains on the basis of Fig. 7, such as Fig. 8, controller 15 is also
Including the 5th control terminal 155, second tune inductor module 19 includes the 3rd tuning coil L3 and the 3rd inductance switch T3, the 5th control
End 155 processed connects the control terminal 1921 of the 3rd inductance switch T3.
The second end 1712 of the connection of the first end 1,911 second matching sub-circuit 171 of 3rd tuning coil L3, the 3rd tuning
The second end 1912 of inductance L3 connects the first end 1922 of the 3rd inductance switch T3, and the second end 1923 of the 3rd inductance switch T3 connects
Ground.
Optionally, the second end 1712 of the connection of the first end 1,922 second matching sub-circuit 171 of the 3rd inductance switch T3, the
The second end 1923 of three inductance switch T3 connects the first end 1911 of the 3rd tuning coil L3, the second end of the 3rd tuning coil L3
1912 ground connection.
In the embodiment of the present invention, the 3rd tuning coil L3 and the 3rd inductance switch T3 are series relationships, the 3rd tuning coil
L3 is grounded by the 3rd inductance switch T3 or the 3rd inductance switch T3 is grounded by the 3rd tuning coil L3.Wherein, the 3rd adjust
Humorous inductance L3 can include an inductance, can also include multiple inductance in parallel or connect including multiple inductance.3rd inductance
Switch T3 can be any one of semiconductor switch pipes such as MOS field-effect transistors, insulated gate double IGBT, triodes.In Fig. 8
The 3rd inductance switch T3 using metal-oxide-semiconductor as example.
Optionally, the signal output part 141 of RF signal transmitter 14 is used for output low frequency radiofrequency signal or high-frequency radio frequency
Signal is to the first distributing point；
In 14 output low frequency radiofrequency signal to the first distributing point 112 of RF signal transmitter, Antenna Operation is in Low-frequency Modes
Formula；
When RF signal transmitter 12 exports high frequency radio signals to the first distributing point 113, Antenna Operation is in high frequency mould
Formula；
Low frequency radio frequency signal includes GSM8500 megahertzs or GSM900 megahertzs of global system for mobile communications；High-frequency radio frequency
Signal includes GSM1800 megahertzs.
Referring to Fig. 9, Fig. 9 is a kind of structure diagram of antenna assembly disclosed by the embodiments of the present invention, antenna assembly 20
Including tuning switch control circuit 10 and power amplifier 21, wherein, power amplifier 21 is connected to the second distributing point 113 and penetrates
Between frequency signal projector 14.Power amplifier 21 is used for the high frequency radio signals or low frequency that send RF signal transmitter 14
Radiofrequency signal is exported after being amplified to the second distributing point 113.Wherein, tuning switch control circuit 10 can be Fig. 1 into Fig. 8
Any one.
Implement antenna assembly shown in Fig. 9, when Antenna Operation is in low frequency mode, control the M to open by controller
At least one switch ways conducting in access is closed, the high-frequency harmonic energy accumulated at above-mentioned M capacitance can be eliminated, so as to
The harmonic excess of radiation dispersion can be improved.
Referring to Fig. 10, Figure 10 is a kind of structure diagram of mobile terminal disclosed by the embodiments of the present invention, the movement is whole
End 30 includes antenna assembly 20 shown in Fig. 7 and terminal body 31, and terminal body 31 can include display screen, processor, storage
The other components such as device, power supply.Mobile terminal can be mobile phone.Wherein, tuning switch control circuit 10 can be Fig. 1 into Fig. 8
Any one.
Implement mobile terminal shown in Fig. 10, when Antenna Operation is in low frequency mode, control the M to open by controller
At least one switch ways conducting in access is closed, the high-frequency harmonic energy accumulated at above-mentioned M capacitance can be eliminated, so as to
The harmonic excess of radiation dispersion can be improved.
In several embodiments provided herein, it should be understood that disclosed device, it can be by another way
It realizes.For example, the apparatus embodiments described above are merely exemplary, such as the division of the unit, it is only one kind
Division of logic function, can there is an other dividing mode in actual implementation, such as multiple units or component can combine or can
To be integrated into another system or some features can be ignored or does not perform.Another, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING or communication connection of device or unit,
Can be electrical or other forms.
The unit illustrated as separating component may or may not be physically separate, be shown as unit
The component shown may or may not be physical location, you can be located at a place or can also be distributed to multiple
In network element.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
The embodiment of the present invention is described in detail above, specific case used herein to the principle of the present invention and
Embodiment is set forth, and the explanation of above example is only intended to help to understand core concept of the invention；Meanwhile for
Those of ordinary skill in the art, thought according to the invention have change in specific embodiments and applications
Place, in conclusion this specification content should not be construed as limiting the invention.
Claims (20)
1. a kind of tuning switch control circuit, which is characterized in that including antenna, the first match circuit, the first tuning switch, radio frequency
Signal projector and controller；
The antenna includes antenna radiator, the first distributing point, and first match circuit includes M matching sub-circuit, described
First tuning switch includes M switch ways, and the M matching sub-circuit is corresponded with the M switch ways, first
Be any one in described M matching sub-circuit with sub-circuit, first switch access in the M switch ways with described the
The corresponding switch ways of one matching sub-circuit, M is positive integer；
First distributing point connects the signal output part of the RF signal transmitter, and described first matches the first of sub-circuit
End connects first distributing point, and the second end of the first matching sub-circuit connects the first end of the first switch access,
The second end ground connection of the first switch access；
The controller includes the first control terminal, and first control terminal connects the control terminal of first tuning switch；It is described
Controller is used to that at least one switch ways in the M switch ways to be controlled to lead when the Antenna Operation is in low frequency mode
It is logical.
2. circuit according to claim 1, which is characterized in that the circuit further includes inductance tuning access, the inductance
The first end for tuning access connects first distributing point, the second end ground connection of the inductance tuning access；The controller is also
For controlling the inductance tuning access conducting when the Antenna Operation is in low frequency mode.
3. circuit according to claim 2, which is characterized in that the controller further includes the second control terminal, the inductance
Tuning access includes the first tuning coil and the first inductance switch, and second control terminal connects the control of first inductance switch
End processed.
4. circuit according to claim 3, which is characterized in that the first end connection described first of first inductance switch
Distributing point, the second end of first inductance switch connect the first end of first tuning coil, first tuning coil
Second end ground connection.
5. circuit according to claim 3, which is characterized in that the first end connection described first of first tuning coil
Distributing point, the second end of first tuning coil connect the first end of first inductance switch, first inductance switch
Second end ground connection.
6. circuit according to claim 1, which is characterized in that the circuit further includes the first tuning coil module, described
The second end of first end connection the first matching sub-circuit of first tuning coil module, the first tuning coil module
Second end is grounded.
7. circuit according to claim 6, which is characterized in that the controller further includes the 3rd control terminal, and described first
Tuning coil module includes second tune inductance and the second inductance switch, and the 3rd control terminal connects second inductance switch
Control terminal.
8. circuit according to claim 7, which is characterized in that the first end connection described first of second inductance switch
The second end of sub-circuit is matched, the second end of second inductance switch connects the first end of the second tune inductance, described
The second end ground connection of second tune inductance.
9. circuit according to claim 7, which is characterized in that the first end connection described first of the second tune inductance
The second end of sub-circuit is matched, the second end of the second tune inductance connects the first end of second inductance switch, described
The second end ground connection of second inductance switch.
10. according to claim 1-9 any one of them circuits, which is characterized in that the circuit further includes the second distributing point,
Two match circuits and second tune switch；
Second match circuit includes N number of matching sub-circuit, and the second tune switch includes N number of switch ways, described N number of
It matches sub-circuit to correspond with N number of switch ways, the second matching sub-circuit is any in N number of matching sub-circuit
A, second switch access is that a switch ways corresponding with the described second matching sub-circuit, N are in N number of switch ways
Positive integer；
The first end of the second matching sub-circuit connects second distributing point, and the second end of the second matching sub-circuit connects
Connect the first end of the second switch access, the second end ground connection of the second switch access.
11. circuit according to claim 10, which is characterized in that the controller further includes the 4th control terminal, and described
Four control terminals connect the control terminal of the second tune switch；
When the Antenna Operation is in low frequency mode, the controller controls N number of switch of the second tune switch logical
Road is all off.
12. circuit according to claim 11, which is characterized in that when the Antenna Operation is in high frequency mode, the control
Device processed controls at least one switch ways conducting in N number of switch ways of the second tune switch.
13. circuit according to claim 12, which is characterized in that at least one switch in N number of switch ways
When access turns on, at least one matching sub-circuit being connected at least one switch ways in N number of switch ways is used for
Adjust the impedance of the antenna.
14. circuit according to claim 10, which is characterized in that the circuit further includes second tune inductor module, institute
State the second end of first end connection the second matching sub-circuit of second tune inductor module, the second tune inductor module
Second end ground connection.
15. circuit according to claim 14, which is characterized in that the controller further includes the 5th control terminal, and described
Two tuning coil modules include the 3rd tuning coil and the 3rd inductance switch, and the 5th control terminal connects the 3rd inductance and opens
The control terminal of pass.
16. circuit according to claim 14, which is characterized in that the first end connection described the of the 3rd inductance switch
The second end of two matching sub-circuits, the second end of the 3rd inductance switch connect the first end of the 3rd tuning coil, institute
State the second end ground connection of the 3rd tuning coil.
17. circuit according to claim 14, which is characterized in that the first end connection described the of the 3rd tuning coil
The second end of two matching sub-circuits, the second end of the 3rd tuning coil connect the first end of the 3rd inductance switch, institute
State the second end ground connection of the 3rd inductance switch.
18. according to claim 11-17 any one of them circuits, the signal output part of the RF signal transmitter is for defeated
Go out low frequency radio frequency signal or high frequency radio signals to first distributing point；
When the RF signal transmitter exports the low frequency radio frequency signal to first distributing point, the Antenna Operation exists
Low frequency mode；
When the RF signal transmitter exports the high frequency radio signals to first distributing point, the Antenna Operation exists
High frequency mode；
The low frequency radio frequency signal includes GSM8500 megahertzs or GSM900 megahertzs of global system for mobile communications；The high frequency
Radiofrequency signal includes GSM1800 megahertzs.
19. a kind of antenna assembly, which is characterized in that including power amplifier and such as claim 1-18 any one of them tune
Humorous ON-OFF control circuit, the power amplifier are used to after the radiofrequency signal that the RF signal transmitter is sent is amplified export
To the antenna.
20. a kind of mobile terminal, which is characterized in that the mobile terminal includes terminal body and the radio frequency electrical as described in 19
Road.
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| CN201711342027.9A CN108111180B (en) | 2017-12-14 | 2017-12-14 | Tuning switch control circuit, antenna device and mobile terminal |
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|---|---|---|---|
| CN201711342027.9A CN108111180B (en) | 2017-12-14 | 2017-12-14 | Tuning switch control circuit, antenna device and mobile terminal |
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| CN108111180B CN108111180B (en) | 2020-06-02 |
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| CN109167187A (en) * | 2018-08-08 | 2019-01-08 | 维沃移动通信有限公司 | Antenna tuning matrix unit, radiation dispersion control device, method and mobile terminal |
| CN110380740A (en) * | 2019-06-24 | 2019-10-25 | 西安联乘智能科技有限公司 | A kind of vehicle intelligent antenna system |
| CN112104770A (en) * | 2020-09-04 | 2020-12-18 | Tcl通讯（宁波）有限公司 | Antenna tuning switch controller, communication module and mobile terminal |
| CN112134585A (en) * | 2019-06-05 | 2020-12-25 | 康希通信科技（上海）有限公司 | Multi-mode multi-frequency transceiver circuit |
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| CN114435038A (en) * | 2022-01-21 | 2022-05-06 | 深圳数马电子技术有限公司 | Antenna power regulating circuit, radio frequency device, electronic equipment and tire pressure detecting system |
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