CN108183331A - Antenna tuning circuit, antenna assembly and mobile terminal - Google Patents
Antenna tuning circuit, antenna assembly and mobile terminal Download PDFInfo
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- CN108183331A CN108183331A CN201711339213.7A CN201711339213A CN108183331A CN 108183331 A CN108183331 A CN 108183331A CN 201711339213 A CN201711339213 A CN 201711339213A CN 108183331 A CN108183331 A CN 108183331A
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- switch
- circuit
- antenna
- inductance
- tuning
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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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- 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
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- 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
-
- 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
-
- 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
-
- 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
- H01Q5/328—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 between a radiating element and ground
-
- 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
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Abstract
The embodiment of the invention discloses a kind of antenna tuning circuit, antenna assembly and mobile terminal, which includes antenna, the first match circuit, the first tuning switch, RF signal transmitter and the first tuning coil module；Antenna includes antenna radiator, the first distributing point and the second 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, and first switch access is a switch ways 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 first matching sub-circuit, the second end ground connection of first switch access, the second end of first end connection the first matching sub-circuit of first tuning coil module, the second end ground connection of the first tuning coil module.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 antenna tuning circuit, antenna assembly and mobile 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 lead to the harmonic excess of radiation dispersion.
Invention content
An embodiment of the present invention provides a kind of antenna tuning circuit, antenna assembly and mobile terminals, can be to avoid antenna
Caused by tuning switch the problem of radiation dispersion.
First aspect of the embodiment of the present invention provides a kind of antenna tuning circuit, is adjusted including antenna, the first match circuit, first
Humorous switch, RF signal transmitter and the first tuning coil module；
The antenna includes antenna radiator, the first distributing point and the second distributing point, and first match circuit includes M
Sub-circuit is matched, first tuning switch includes M switch ways, the M matching sub-circuit and the M switch ways
It corresponds, the first matching sub-circuit is any one in described M matching sub-circuit, and first switch access is opened for the M
A switch ways corresponding with the described first matching sub-circuit in access are closed, M is positive integer；
Second distributing point connects the signal output end 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, first end connection first matching of the first tuning coil module
The second end of sub-circuit, the second end ground connection of the first tuning coil module.
Second aspect of the embodiment of the present invention provides a kind of antenna assembly, which includes power amplifier and this hair
The antenna tuning 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 M switch ways of the first tuning switch are all off, this M are opened
It closes access and is equivalent to M capacitance when disconnecting, the high frequency in the radiofrequency signal that the signal output end of RF signal transmitter exports
Harmonic energy can be accumulated at above-mentioned M capacitance, in the embodiment of the present invention, by adding in the first tuning coil module, be equivalent to
In parallel inductance, the high-frequency harmonic energy elimination that can will be accumulated at above-mentioned M capacitance avoid on the basis of above-mentioned M capacitance
The radiation dispersion problem of high-frequency harmonic that first tuning switch is likely to occur when disconnecting, so as to improving the humorous of radiation dispersion
Wave is exceeded.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below
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 antenna tuning circuit disclosed by the embodiments of the present invention；
Fig. 2 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention；
Fig. 3 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention；
Fig. 4 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention；
Fig. 5 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention；
Fig. 6 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention；
Fig. 7 is a kind of structure diagram of antenna assembly disclosed by the embodiments of the present invention；
Fig. 8 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 shall fall within the protection scope of the present 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 antenna tuning circuit disclosed by the embodiments of the present invention, such as Fig. 1 institutes
Show, the antenna tuning circuit include antenna 11, the first match circuit 12, the first tuning switch 13, RF signal transmitter 14 with
And the first tuning coil module 15.
Antenna 11 includes antenna radiator 111, the first distributing point 112 and the second distributing point 113, and the first match circuit 12 wraps
Include M matching sub-circuit (it is as shown in Figure 1 121,122 ... 12M), the first tuning switch 13 includes M switch ways (such as figure
Shown in 1 131,132 ... 13M), M matching sub-circuit is with M switch ways one-to-one correspondence (as shown in Figure 1,121 and 131
Corresponding, 122 correspondings with 132 ... 12M is corresponding with 13M), first to match sub-circuit 121 be M any matched in sub-circuit
A, first switch access 131 is, with first matching 121 corresponding switch ways of sub-circuit, M is just in M switch ways
Integer.
Second distributing point 113 connects the signal output end 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, and the first end 151 of the first tuning coil module 15 connects
The second end 1212 of the first matching sub-circuit 121 is connect, the second end 152 of the first tuning coil module 15 is grounded.
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, second
Distributing point 113 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 current of the transmission of RF signal transmitter 14 by the second distributing point 113.According to electromagnetic induction principle, high-frequency electrical
Stream, which flows through antenna radiator 111, can generate magnetic field, so as to which antenna radiator 111 be made to give off energy in the form of an electromagnetic wave
It goes.
RF signal transmitter 14 can be located on mainboard, the signal of the second distributing point 113 and RF signal transmitter 14
Output terminal 141 connects, the radiofrequency signal (radio frequency that the second distributing point 113 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 produced, 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 is operated in low frequency mode as transmitting antenna, in order to ensure radiation efficiency, the aerial radiation that needs
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, do not need to adjust electrical length, the first distributing point 112 does not need to access any
With circuit, it is therefore desirable to which the M switch ways that the first tuning switch 13 includes are turned off.Since the second distributing point 113 has high pressure
Presence, this M switch ways be equivalent to M capacitance when disconnecting, the first end of this M capacitance connect respectively M match it is sub
Circuit, the second end ground connection of this M capacitance.In the radiofrequency signal that the signal output end 141 of RF signal transmitter 14 exports
High-frequency harmonic energy can be accumulated in the first end of above-mentioned M capacitance, since antenna 11 is excited using electric field, and this M electricity
The voltage difference for holding 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 equivalent on the basis of above-mentioned M capacitance in parallel by adding in the first tuning coil module 15
Inductance can eliminate the high-frequency harmonic energy accumulated at above-mentioned M capacitance, 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 15 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 15
End ground connection, the voltage of accumulation at above-mentioned M capacitance can be pulled to ground terminal by the first tuning coil module 15, so as to by radio frequency
The high-frequency harmonic energy being accumulated at M capacitance in the radiofrequency signal that the signal output end 141 of signal projector 14 exports disappears
It removes, so as to improve the harmonic excess of radiation dispersion.Meanwhile first tuning coil module 15 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.
In the embodiment of the present invention, the first matching sub-circuit 121 is any one in M matching sub-circuit, and the first tuning is electric
The second end 1212 of the connection of the first end 151 first matching sub-circuit 121 of sense module 15, the second of the first tuning coil module 15
152 ground connection of end.The second end of each matching sub-circuit in above-mentioned M matching sub-circuit can connect a tuning coil mould
Block matches M by tuning coil module the high-frequency harmonic energy that the second end of each matching sub-circuit in sub-circuit is accumulated
Amount is eliminated, so as to improve the harmonic excess of radiation dispersion.The embodiment of the present invention can increase M tuning coil module, often
A tuning coil module can be carried out the elimination of higher hamonic wave energy, can improve higher harmonic cancellation speed, quickly improve spoke
Penetrate spuious harmonic excess.
Optionally, the signal output end 141 of RF signal transmitter 14 is used for output low frequency radiofrequency signal or high-frequency radio frequency
Signal is to the second distributing point 113；
In 14 output low frequency radiofrequency signal to the second distributing point 113 of RF signal transmitter, antenna 11 is operated in low frequency
Pattern, the M switch ways that the first tuning switch 13 includes are all off；
First tuning coil module 15 is used to that the energy of the first distributing point 112 to disappear when Antenna Operation is in low frequency mode
It removes.
Optionally, low frequency radio frequency signal includes GSM8500 megahertzs or GSM900 megahertzs of global system for mobile communications；It is high
Frequency radiofrequency signal includes GSM1800 megahertzs.
In the embodiment of the present invention, in 14 output low frequency radiofrequency signal to the second distributing point 113 of RF signal transmitter, penetrate
Frequency signal projector 14 itself should only emit low frequency radio frequency signal, however, the inside member device due to RF signal transmitter 14
Part is not ideal component, and there are more or less nonlinear devices, often adjoint during low frequency radio frequency signal is emitted
The high-frequency harmonics such as second harmonic, the triple-frequency harmonics of the low frequency radio frequency signal.Since the first distributing point 112 is operated in antenna 11
It is used under high frequency, in low frequency operation, M switch ways of the first tuning switch 13 all disconnect antenna 11, are equivalent to be formed
M capacitance, the first match circuit 12 being connect with the first distributing point 112 and the first tuning switch 13 are quicker to high-frequency signal
Sense, the energy of these higher hamonic waves can be in the first end that above-mentioned M capacitance is reached by the first distributing point 112, above-mentioned M capacitance
Second end ground connection.The first end of first tuning coil module 15 connects first of first switch access 131 in M switch ways
End 1311, the first end 1311 of first switch access 131 is equivalent to the first end of one of capacitance of above-mentioned M capacitance, because
This, the first tuning coil module 15 can release the voltage quick release of the first end of one of capacitance of above-mentioned M capacitance
The energy of higher hamonic wave is put, so as to improve the harmonic excess of radiation dispersion.
Optionally, when RF signal transmitter 14 exports high frequency radio signals to the second distributing point 113, antenna 11 works
In high frequency mode, when antenna 11 is operated in high frequency mode, at least one of M switch ways of the first tuning switch 13 are opened
Close access conducting.
It, can be by adjusting M when at least one of M switch ways of the first tuning switch 13 switch ways are connected
Which or which way switch access in a switch ways is connected to adjust the working frequency of antenna 11 under high frequency mode.
Optionally, when at least one of M switch ways switch ways are connected, in M 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 of M switch ways of the first tuning switch 13 switch ways are connected, with M switch ways
At least one of 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 second distributing point 113,
So that antenna tuning circuit is operated in impedance matching condition.Matching sub-circuit can not only adjust antenna 11 under high frequency mode
Working frequency can also adjust antenna tuning circuit work in impedance matching condition.
Wherein, matching sub-circuit can form π type match circuits by an inductance and two capacitances.
Referring to Fig. 2, Fig. 2 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention, Fig. 2 is
It is advanced optimized on the basis of Fig. 1.As shown in Fig. 2, the antenna tuning circuit further includes controller 16, controller 16
Including the first control terminal 161, the first tuning coil module 15 includes the first tuning coil L1 and the first inductance switch T1, the first control
End 161 processed connects the control terminal 1521 of the first inductance switch T1；
The second end 1212 of the connection of the first end 1,511 first matching sub-circuit 121 of first tuning coil L1, the first tuning
The second end 1512 of inductance L1 connects the first end 1522 of the first inductance switch T1, and the second end 1523 of the first inductance switch T1 connects
Ground.
Optionally, the connection mode of the first tuning coil L1 and inductance switch T1 can also connect in such a way：
The second end 1212 of the connection of the first end 1,522 first matching sub-circuit 121 of first inductance switch T1, the first inductance switch T1's
Second end 1523 connects the first end 1511 of the first tuning coil L1, and the second end 1512 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, it first adjusts
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. 2 is using metal-oxide-semiconductor as example.
Optionally, when antenna 11 is operated in low frequency mode, controller 16 controls the first inductance switch T1 conductings, in antenna
11 when being operated in high frequency mode, and controller 16 controls the first inductance switch T1 to disconnect.
In the embodiment of the present invention, when antenna 11 is operated in low frequency mode, M included due to the first tuning switch 13 are opened
Access shutdown is closed, this M switch ways is equivalent to M capacitance when disconnecting, and the energy of higher hamonic wave can be the first of M capacitance
It is accumulated at end, M capacitance second end ground connection needs to eliminate the energy of higher hamonic wave using the first tuning coil L1.
When antenna 11 is operated in high frequency mode, in order to avoid the first tuning coil L1 causes to do to the high-frequency signal of antenna
It disturbs, the first inductance switch T1 is controlled to disconnect by controller 16, so that the first tuning coil is stopped.
If specifically, the first inductance switch T1 be NMOS tube, when antenna 11 is operated in high frequency mode, controller 16
First control terminal 161 exports low level signal to the first inductance switch T1, so that the first inductance switch T1 is disconnected；In 11 work of antenna
Make in low frequency mode, the first control terminal 161 of controller 16 exports high level signal to the first inductance switch T1, so that first
Inductance switch T1 is connected.
Optionally, controller 16 further includes the second control terminal 162, and the second control terminal 162 connects the first tuning switch 13
Control terminal 130；
When antenna 11 is operated in high frequency mode, controller 16 is controlled in M switch ways of the first tuning switch 13
At least one switch ways conducting.
The embodiment of the present invention can flexibly control the conducting shape of M switch of the first tuning switch 13 by controller 16
State can flexibly adjust the frequency of antenna 11 under high frequency mode.
Referring to Fig. 3, Fig. 3 is the structure diagram of another antenna tuning circuit disclosed by the embodiments of the present invention, Fig. 3 is
It is advanced optimized on the basis of Fig. 2.As shown in figure 3, antenna tuning circuit further includes the second match circuit 17 and
Two tuning 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 location 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 figure 4, controller 16 further includes third control terminal 163, the connection of third control terminal 163 second is adjusted
The control terminal 180 of humorous switch 18；
When antenna 11 is operated in low frequency mode, controller 16 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 does not need to 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 16 controls N number of switch of second tune switch 18 to lead to
The switch ways conducting of at least one of road.
It, can be by adjusting N when the switch ways conducting of at least one of N number of switch ways of second tune switch 18
Which or which way switch access in a switch ways is connected to adjust the working frequency of antenna 11 under high frequency mode.
Optionally, when at least one of N number of switch ways switch ways are connected, 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 the switch ways conducting of at least one of N number of switch ways of second tune switch 18, with N number of switch ways
At least one of 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 second distributing point 113,
So that antenna tuning circuit is operated in impedance matching condition.Matching sub-circuit can not only adjust antenna 11 under high frequency mode
Working frequency can also adjust antenna tuning circuit work in impedance matching condition.Wherein, matching sub-circuit can be by one
A inductance and two capacitance composition π type match circuits.
Optionally, as shown in figure 5, antenna tuning circuit further includes second tune inductor module 19, second tune inductance mould
The second end 1712 of the connection of the first end 191 second matching sub-circuit 171 of block 19, the second end of second tune inductor module 19
192 ground connection.
Since the second distributing point 113 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 end 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 can eliminate the high-frequency harmonic energy accumulated at above-mentioned N number of capacitance, 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.
As shown in fig. 6, controller 16 further includes the 4th control terminal 164, second tune inductor module 19 includes second tune
Inductance L2 and the second inductance switch T2, the 4th control terminal 164 connect the control terminal 1921 of the second inductance switch T2.
The second end 1712 of the connection of the first end 1,911 second matching sub-circuit 171 of second tune inductance L2, second tune
The second end 1912 of inductance L2 connects the first end 1922 of the second inductance switch T2, and the second end 1923 of the second inductance switch T2 connects
Ground.
The second end 1712 of the connection of the first end 1,922 second matching sub-circuit 171 of second inductance switch T2, the second inductance
The second end 1923 for switching T2 connects the first end 1911 of second tune inductance L2, and the second end 1912 of second tune inductance L2 connects
Ground.
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, it second adjusts
Humorous inductance L2 can include an inductance, can also include multiple inductance in parallel or connect including multiple inductance.Second inductance
Switch T2 can be any one of semiconductor switch pipes such as MOS field-effect transistors, insulated gate double IGBT, triodes.In Fig. 6
The second inductance switch T2 using metal-oxide-semiconductor as example.
Referring to Fig. 7, Fig. 7 is a kind of structure diagram of antenna assembly disclosed by the embodiments of the present invention, antenna assembly 20
Including antenna tuning circuit 10 and power amplifier 21, wherein, power amplifier 21 is connected to the second distributing point 113 and radio frequency letter
Between number transmitter 14.Power amplifier 21 is used for the high frequency radio signals for sending out RF signal transmitter 14 or low frequency radio frequency
Signal is exported after being amplified to the second distributing point 113.Wherein, antenna tuning circuit 10 can be any one in Fig. 1 to Fig. 6
Kind.
Implement antenna assembly shown in Fig. 7, it, can be to avoid antenna tuning circuit 10 by adding in the first tuning coil module
The first tuning switch 13 radiation dispersion problem of high-frequency harmonic for being likely to occur when disconnecting, so as to improve radiation dispersion
Harmonic excess.
Referring to Fig. 8, Fig. 8 is a kind of structure diagram of mobile terminal disclosed by the embodiments of the present invention, the mobile terminal
30 include antenna assembly 20 shown in Fig. 7 and terminal body 31, terminal body 31 can include display screen, processor, memory,
The other components such as power supply.Mobile terminal can be mobile phone.Wherein, antenna tuning circuit 10 can be any one in Fig. 1 to Fig. 6
Kind.
Implement mobile terminal shown in Fig. 8, it, can be to avoid antenna tuning circuit 10 by adding in the first tuning coil module
The first tuning switch 13 radiation dispersion problem of high-frequency harmonic for being likely to occur when disconnecting, so as to improve radiation dispersion
Harmonic excess.
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 a kind of
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 point, 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 unit, 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 according to the actual needs to realize the mesh of this embodiment scheme
'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 expounded, 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 present invention have change in specific embodiments and applications
Place, in conclusion the content of the present specification should not be construed as limiting the invention.
Claims (20)
1. a kind of antenna tuning circuit, which is characterized in that including antenna, the first match circuit, the first tuning switch, radiofrequency signal
Transmitter and the first tuning coil module；
The antenna includes antenna radiator, the first distributing point and the second distributing point, and first match circuit includes M matching
Sub-circuit, first tuning switch include M switch ways, and the M matching sub-circuit and the M switch ways are one by one
Corresponding, the first matching sub-circuit is any one in described M matching sub-circuit, and first switch access is logical for described M switch
The corresponding switch ways of first matching sub-circuit described in Lu Zhongyu, M is positive integer；
Second distributing point connects the signal output end 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, first end connection the first matching son electricity of the first tuning coil module
The second end on road, the second end ground connection of the first tuning coil module.
2. circuit according to claim 1, which is characterized in that the signal output end of the RF signal transmitter is for defeated
Go out low frequency radio frequency signal or high frequency radio signals to second distributing point；
When the RF signal transmitter exports the low frequency radio frequency signal to second distributing point, the Antenna Operation exists
Low frequency mode, the M switch ways that first tuning switch includes are all off；
The first tuning coil module is used for the energy of first distributing point when the Antenna Operation is in low frequency mode
It eliminates.
3. circuit according to claim 2, which is characterized in that export the high-frequency radio frequency in the RF signal transmitter
During signal to second distributing point, the Antenna Operation leads in high frequency mode, the M switch of first tuning switch
The switch ways conducting of at least one of road.
4. circuit according to claim 3, which is characterized in that when at least one of described M switch ways switch is logical
When road is connected, at least one matching sub-circuit being connect at least one of M switch ways switch ways is used to adjust
Save the impedance of the antenna.
5. circuit according to claim 2, which is characterized in that the circuit further includes controller, and the controller includes
First control terminal, the first tuning coil module include the first tuning coil and the first inductance switch, first control terminal
Connect the control terminal of first inductance switch.
6. circuit according to claim 5, which is characterized in that
The second end of first end connection the first matching sub-circuit of first inductance switch, first inductance switch
Second end connects the first end of first tuning coil, the second end ground connection of first tuning coil.
7. circuit according to claim 5, which is characterized in that
The second end of first end connection the first matching sub-circuit of first tuning coil, first tuning coil
Second end connects the first end of first inductance switch, the second end ground connection of first inductance switch.
8. circuit according to claim 5, which is characterized in that when the Antenna Operation is in low frequency mode, the control
Device controls the first inductance switch conducting, when the Antenna Operation is in high frequency mode, the controller control described first
Inductance switch disconnects.
9. circuit according to claim 5, which is characterized in that the controller further includes the second control terminal, and described second
Control terminal connects the control terminal of first tuning switch；
When the Antenna Operation is in high frequency mode, the controller controls the M switch of first tuning switch logical
The switch ways conducting of at least one of road.
10. according to claim 5-9 any one of them circuits, which is characterized in that the circuit further includes the second match circuit
It is switched with second tune；
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 third control terminal, and described
Three 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 controller controls N number of switch of the second tune switch logical
The switch ways conducting of at least one of road.
13. circuit according to claim 12, which is characterized in that
When at least one of N number of switch ways switch ways are connected, at least one of with N number of switch ways
At least one matching sub-circuit of switch ways connection is used to 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 4th control terminal, and described
Two tuning coil modules include second tune inductance and the second inductance switch, and the 4th control terminal connects second inductance and opens
The control terminal of pass.
16. circuit according to claim 14, which is characterized in that
The second end of first end connection the second matching sub-circuit of second inductance switch, second inductance switch
Second end connects the first end of the second tune inductance, the second end ground connection of the second tune inductance.
17. circuit according to claim 14, which is characterized in that
The second end of first end connection the second matching sub-circuit of the second tune inductance, the second tune inductance
Second end connects the first end of second inductance switch, the second end ground connection of second inductance switch.
18. according to claim 11-17 any one of them circuits, the low frequency radio frequency signal includes global system for mobile communications
GSM8500 megahertzs or GSM900 megahertzs；The high frequency radio signals include 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 day
Line tuning circuit, the power amplifier are exported after being used for the radiofrequency signal for sending RF signal transmitter amplification to institute
State 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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| CN201711339213.7A CN108183331B (en) | 2017-12-14 | 2017-12-14 | Antenna tuning circuit, antenna device and mobile terminal |
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|---|---|---|---|
| CN201711339213.7A CN108183331B (en) | 2017-12-14 | 2017-12-14 | Antenna tuning circuit, antenna device and mobile terminal |
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| CN108183331B CN108183331B (en) | 2020-12-01 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004367A (en) * | 2018-07-27 | 2018-12-14 | 南昌黑鲨科技有限公司 | Broadband antenna unit and mobile terminal |
| CN109193183A (en) * | 2018-09-11 | 2019-01-11 | 深圳市思讯通信技术有限公司 | The antenna system of wearable smart machine and wearable smart machine |
| CN109755748A (en) * | 2019-01-21 | 2019-05-14 | 联想(北京)有限公司 | Electronic equipment |
| CN109950701A (en) * | 2019-03-20 | 2019-06-28 | Oppo广东移动通信有限公司 | Antenna module and mobile terminal |
| CN110224226A (en) * | 2019-04-02 | 2019-09-10 | 西安易朴通讯技术有限公司 | Antenna, method of controlling antenna and device |
| CN110649391A (en) * | 2018-06-26 | 2020-01-03 | 苹果公司 | Electronic device antenna with switchable feed terminal |
| CN111082203A (en) * | 2018-10-22 | 2020-04-28 | 意法半导体(图尔)公司 | Antenna for mobile communication device |
| WO2020134367A1 (en) * | 2018-12-29 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Antenna system and mobile terminal |
| 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 |
| CN115149973A (en) * | 2021-11-09 | 2022-10-04 | 浙江利尔达物联网技术有限公司 | NB-Iot module |
| WO2022262478A1 (en) * | 2021-06-18 | 2022-12-22 | 安徽安努奇科技有限公司 | Tuning circuit and communication device |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060009165A1 (en) * | 2004-07-09 | 2006-01-12 | Atmel Germany Gmbh | High frequency circuit |
| KR100639589B1 (en) * | 1998-04-07 | 2006-10-27 | 텔레폰악티에볼라겟 엘엠 에릭슨(펍) | Antenna switch |
| JP4073964B2 (en) * | 1997-02-25 | 2008-04-09 | テレフオンアクチーボラゲツト エル エム エリクソン（パブル） | Device and method for communication |
| EP1919027B1 (en) * | 2006-11-02 | 2012-04-04 | Panasonic Corporation | Antenna switching circuit with band pass filter and harmonics suppression |
| US20150054698A1 (en) * | 2013-08-21 | 2015-02-26 | Rf Micro Devices, Inc. | Antenna tuning circuitry with reduced interference |
| CN105609969A (en) * | 2016-02-22 | 2016-05-25 | 深圳市金立通信设备有限公司 | Communication terminal |
| CN105633555A (en) * | 2016-01-25 | 2016-06-01 | 宇龙计算机通信科技(深圳)有限公司 | Antenna switching assembly, switching method, switching system, antenna and mobile terminal |
| CN105897280A (en) * | 2016-04-08 | 2016-08-24 | 广东欧珀移动通信有限公司 | Antenna tuning circuit and mobile terminal |
| CN106099370A (en) * | 2015-04-29 | 2016-11-09 | 联发科技股份有限公司 | Antenna system, harmonics restraint element and radio-frequency unit |
| CN106684557A (en) * | 2015-11-10 | 2017-05-17 | 小米科技有限责任公司 | Antenna assembly and electronic equipment |
| CN206259922U (en) * | 2016-11-22 | 2017-06-16 | 广东欧珀移动通信有限公司 | RF front-end module and mobile terminal |
-
2017
- 2017-12-14 CN CN201711339213.7A patent/CN108183331B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4073964B2 (en) * | 1997-02-25 | 2008-04-09 | テレフオンアクチーボラゲツト エル エム エリクソン（パブル） | Device and method for communication |
| KR100639589B1 (en) * | 1998-04-07 | 2006-10-27 | 텔레폰악티에볼라겟 엘엠 에릭슨(펍) | Antenna switch |
| US20060009165A1 (en) * | 2004-07-09 | 2006-01-12 | Atmel Germany Gmbh | High frequency circuit |
| EP1919027B1 (en) * | 2006-11-02 | 2012-04-04 | Panasonic Corporation | Antenna switching circuit with band pass filter and harmonics suppression |
| US20150054698A1 (en) * | 2013-08-21 | 2015-02-26 | Rf Micro Devices, Inc. | Antenna tuning circuitry with reduced interference |
| CN106099370A (en) * | 2015-04-29 | 2016-11-09 | 联发科技股份有限公司 | Antenna system, harmonics restraint element and radio-frequency unit |
| CN106684557A (en) * | 2015-11-10 | 2017-05-17 | 小米科技有限责任公司 | Antenna assembly and electronic equipment |
| CN105633555A (en) * | 2016-01-25 | 2016-06-01 | 宇龙计算机通信科技(深圳)有限公司 | Antenna switching assembly, switching method, switching system, antenna and mobile terminal |
| CN105609969A (en) * | 2016-02-22 | 2016-05-25 | 深圳市金立通信设备有限公司 | Communication terminal |
| CN105897280A (en) * | 2016-04-08 | 2016-08-24 | 广东欧珀移动通信有限公司 | Antenna tuning circuit and mobile terminal |
| CN206259922U (en) * | 2016-11-22 | 2017-06-16 | 广东欧珀移动通信有限公司 | RF front-end module and mobile terminal |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110649391A (en) * | 2018-06-26 | 2020-01-03 | 苹果公司 | Electronic device antenna with switchable feed terminal |
| CN110649391B (en) * | 2018-06-26 | 2022-01-25 | 苹果公司 | Electronic device antenna with switchable feed terminal |
| US11205834B2 (en) | 2018-06-26 | 2021-12-21 | Apple Inc. | Electronic device antennas having switchable feed terminals |
| CN109004367B (en) * | 2018-07-27 | 2021-11-23 | 南昌黑鲨科技有限公司 | Broadband antenna device and mobile terminal |
| CN109004367A (en) * | 2018-07-27 | 2018-12-14 | 南昌黑鲨科技有限公司 | Broadband antenna unit and mobile terminal |
| CN109193183A (en) * | 2018-09-11 | 2019-01-11 | 深圳市思讯通信技术有限公司 | The antenna system of wearable smart machine and wearable smart machine |
| CN111082203A (en) * | 2018-10-22 | 2020-04-28 | 意法半导体(图尔)公司 | Antenna for mobile communication device |
| WO2020134367A1 (en) * | 2018-12-29 | 2020-07-02 | 瑞声声学科技(深圳)有限公司 | Antenna system and mobile terminal |
| CN109755748A (en) * | 2019-01-21 | 2019-05-14 | 联想(北京)有限公司 | Electronic equipment |
| CN109755748B (en) * | 2019-01-21 | 2021-09-14 | 联想(北京)有限公司 | Electronic device |
| CN109950701A (en) * | 2019-03-20 | 2019-06-28 | Oppo广东移动通信有限公司 | Antenna module and mobile terminal |
| CN110224226A (en) * | 2019-04-02 | 2019-09-10 | 西安易朴通讯技术有限公司 | Antenna, method of controlling antenna and device |
| CN110224226B (en) * | 2019-04-02 | 2021-09-28 | 西安易朴通讯技术有限公司 | Antenna, antenna control method and device |
| 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 |
| CN112104770B (en) * | 2020-09-04 | 2022-08-05 | Tcl通讯（宁波）有限公司 | Antenna tuning switch controller, communication module and mobile terminal |
| WO2022262478A1 (en) * | 2021-06-18 | 2022-12-22 | 安徽安努奇科技有限公司 | Tuning circuit and communication device |
| CN115149973A (en) * | 2021-11-09 | 2022-10-04 | 浙江利尔达物联网技术有限公司 | NB-Iot module |
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Address after: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Applicant after: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. Address before: Changan town in Guangdong province Dongguan 523860 usha Beach Road No. 18 Applicant before: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS Corp.,Ltd. |
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