CN108110423A - Antenna tuning circuit, antenna assembly and mobile terminal - Google Patents
Antenna tuning circuit, antenna assembly and mobile terminal Download PDFInfo
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- CN108110423A CN108110423A CN201711371309.1A CN201711371309A CN108110423A CN 108110423 A CN108110423 A CN 108110423A CN 201711371309 A CN201711371309 A CN 201711371309A CN 108110423 A CN108110423 A CN 108110423A
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- 239000000203 mixture Substances 0.000 claims description 3
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 16
- 239000006185 dispersion Substances 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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Classifications
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- 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
- 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
- H01Q1/12—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
- H01Q1/243—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 with built-in antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- 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
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
-
- 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
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/35—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points
Abstract
This application discloses a kind of antenna tuning circuit and mobile terminal, antenna tuning circuit includes：Including antenna, the first match circuit, the second match circuit, first switch, second switch and radio-frequency signal transceiver；The antenna includes the first distributing point, the second distributing point and the 3rd distributing point that are arranged in order；First match circuit and the first switch are connected between first distributing point and ground, and second match circuit and the second switch are connected between second distributing point and ground；When working frequency range is in low frequency, the radiofrequency signal of the radio-frequency signal transceiver transmitting reaches the antenna radiator by the 3rd distributing point, the first switch and the second switch are both turned on, and the frequency range in the 3rd band limits is less than the frequency range in second band limits.Radiation dispersion can inhibit using the embodiment of the present application.
Description
Technical field
This application involves a kind of electronic technology field more particularly to antenna tuning circuit, antenna assembly and mobile terminals.
Background technology
Forcible authentication index of the radiation dispersion as current electronic equipment (such as smart mobile phone etc.), is among all certifications
A problem that is most complicated, being difficult to resolve the most.Particularly global system for mobile communications (Global System for Mobile
Communication, GSM) frequency range, because the power of GSM in itself is higher, it is easy in moment the energy having by force be excited to lead
Cause the harmonic excess of radiation dispersion.It is mainly triple-frequency harmonics, the second harmonic of GSM1800 of GSM900 in actual engineering
Or GSM1800 triple-frequency harmonics is exceeded.
For radiofrequency signal, the signal that we emit can not only include available signal (such as GSM900), toward contact
The ingredient of second harmonic (such as 1800GHz) or triple-frequency harmonics (such as 2700GHz) can be included.It is most of in actual engineering
It is exceeded to be that triple-frequency harmonics is present with.It, will be by these at the resonance three times of the triple-frequency harmonics energy arrival antenna of radiofrequency signal
Useless harmonic energy is radiate, so as to cause spuious exceeded.
The content of the invention
The embodiment of the present application provides a kind of antenna tuning circuit and mobile terminal, for eliminating in low frequency operation, feed point
High voltage cause the situation of tuning switch saturation, and then inhibit radiation dispersion.
In a first aspect, the embodiment of the present application provides a kind of antenna tuning circuit, including antenna, the first match circuit, second
Match circuit, first switch, second switch and radio-frequency signal transceiver；
The antenna includes the first distributing point, the second distributing point and the 3rd distributing point that are arranged in order；First matching
Circuit and the first switch are connected between first distributing point and ground, second match circuit and the second switch
It is connected between second distributing point and ground；
When working frequency range is in the first band limits, the radiofrequency signal of radio-frequency signal transceiver transmitting passes through described
First distributing point reaches the antenna radiator, and the second switch conducting, the first switch disconnects or conducting；
When working frequency range is in the second band limits, the radiofrequency signal of radio-frequency signal transceiver transmitting passes through described
First distributing point reaches the antenna radiator, the first switch conducting, and the second switch disconnects, the second frequency range model
Frequency range in enclosing is less than the frequency range in first band limits；
When working frequency range is in three band limits, the radiofrequency signal of radio-frequency signal transceiver transmitting passes through described
3rd distributing point reaches the antenna radiator, and the first switch and the second switch are both turned on, the 3rd frequency range model
Frequency range in enclosing is less than the frequency range in second band limits.
Second aspect, the embodiment of the present application provide a kind of antenna assembly, are provided including power amplifier and first aspect
Antenna tuning circuit, the power amplifier is used to export after the amplification of radiofrequency signal that the radio-frequency signal transceiver is sent
To the antenna.
The third aspect, the embodiment of the present application provide a kind of mobile terminal, are provided including terminal body and first aspect
Antenna assembly.
As can be seen that in the embodiment of the present application, increase a low frequency distributing point (i.e. the 3rd distributing point), in low frequency operation
Under, low frequency energy is directly carried out spoke by the radiofrequency signal of RF signal transmitter transmitting by the low frequency distributing point and antenna body
It penetrates, eliminates in low frequency operation, the high voltage of distributing point causes the situation of tuning switch saturation, and then inhibits radiation dispersion.
These aspects or other aspects of the application can more straightforward in the following description.
Description of the drawings
In order to illustrate more clearly of the technical solution in the embodiment of the present application or background technology, the application will be implemented below
Attached drawing illustrates needed in example or background technology.
Fig. 1 is a kind of schematic diagram of the tuning circuit of slot antenna provided by the embodiments of the present application；
Fig. 2 is a kind of schematic diagram of antenna tuning circuit provided by the embodiments of the present application；
Fig. 3 is that the embodiment of the present application provides a kind of partial schematic diagram of antenna tuning circuit；
Fig. 4 is the partial schematic diagram that the embodiment of the present application provides another antenna tuning circuit；
Fig. 5 is the partial schematic diagram of another antenna tuning circuit provided by the embodiments of the present application；
Fig. 6 is the partial schematic diagram of another antenna tuning circuit provided by the embodiments of the present application；
Fig. 7 is the partial schematic diagram of another antenna tuning circuit provided by the embodiments of the present application；
Fig. 8 is that the embodiment of the present application provides a kind of structure diagram of antenna assembly；
Fig. 9 is that the embodiment of the present application provides a kind of structure diagram of mobile terminal.
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.
Mobile terminal involved by the embodiment of the present invention can include the various handheld devices with wireless communication function,
Mobile unit, wearable device, computing device or other processing equipments and various forms for being connected to radio modem
User equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal device (terminal
Device) etc..For convenience of description, apparatus mentioned above is referred to as mobile terminal.
Fig. 1 is a kind of schematic diagram of the tuning circuit of slot antenna provided by the embodiments of the present application, referring to Fig. 1, the antenna
Tuning circuit include antenna, distributing point, main power feed point, two tuning switch and two match circuits.Ground distributing point and master
Two tuning switch of distributing point connection are mainly used for adjusting medium-high frequency.The operation principle of the tuning circuit of the slot antenna is main
It is the switching that different frequency range is realized by two tuning switch and two match circuits.
As shown in Figure 1, main power feed point is grounded by tuning switch, when medium-high frequency (if the frequency that antenna size itself is supported
Section is 900 megahertzs of GSM, then medium-high frequency refers to that the frequency range more than 900 megahertzs of GSM, such as medium-high frequency have GSM1800
Megahertz, GSM1900 megahertzs etc..The frequency range that if antenna size itself is supported again is 1800 megahertzs of GSM, then middle height
Frequency refers to the frequency range more than 1800 megahertzs of GSM, for example, medium-high frequency have GSM1900 megahertzs when) work when, pass through matching
Circuit and tuning switch switch to the corresponding matching of medium-high frequency so that Antenna Operation is in medium-high frequency, so as to by medium-high frequency energy spoke
It is shot out.When low frequency (if antenna size itself support frequency range be 900 megahertzs of GSM, then low frequency refer to being less than or
Frequency range of 900 megahertzs equal to GSM, and if the frequency range of antenna size support itself is GSM1800, then high frequency refers to
Frequency range of 1800 megahertzs less than or equal to GSM) work when, since antenna size itself is just designed in low frequency band, nothing
The tuning switch at main power feed point need to be used, low frequency energy directly from main power feed point conduct and then radiated.For gap day
Line, in low frequency operation, main power feed point is to radiate low frequency energy in a manner that electric field is fierce, so in main power feed
Point has and its powerful voltage signal, high voltage can cause the tuning switch saturation of main power feed point, and then causes radiation dispersion
It is exceeded.
In view of the above-mentioned problems, referring to Fig. 2, the embodiment of the present application provides a kind of schematic diagram of antenna tuning circuit, the day
Line tuning circuit includes：It antenna 10, the first match circuit 20, the second match circuit 30, first switch 40, second switch 50 and penetrates
Frequency signal transceiver 60；
Antenna 10 includes the first distributing point 11, the second distributing point 12 and the 3rd distributing point 13 that are arranged in order；First matching
Circuit 20 and first switch 40 are connected between the first distributing point 11 and ground, and the second match circuit 30 is connected on second switch 50
Between second distributing point 12 and ground；
When working frequency range is in the first band limits, the radiofrequency signal that radio-frequency signal transceiver 60 emits passes through the first feedback
Electricity point 11 reaches antenna 10, and second switch 50 turns on, and first switch 40 is disconnected or turned on；
When working frequency range is in the second band limits, the radiofrequency signal that radio-frequency signal transceiver 60 emits passes through the first feedback
Electricity point 11 reaches antenna 10, and first switch 40 turns on, and second switch 50 disconnects, and the frequency range in the second band limits is less than the first frequency
Frequency range in segment limit；
When working frequency range is in three band limits, the radiofrequency signal that radio-frequency signal transceiver 60 emits passes through the 3rd feedback
Electricity point 13 reaches the antenna 10, and first switch 40 and second switch 50 are both turned on, and the frequency range in the 3rd band limits is less than institute
State the frequency range in the second band limits.
Wherein, the frequency range in the 3rd band limits can be less than or equal to 850 megahertzs of GSM, less than or equal to GSM
900 megahertzs or less than or equal to 1800 megahertzs of GSM etc., then this is not construed as limiting.
Wherein, the frequency range in the second band limits can be the frequency range in 850 megahertzs or so of GSM, and more than GSM
850 megahertzs, the frequency range in 900 megahertzs or so of GSM, and more than 900 megahertzs of GSM or on a GSM1800 megahertzs of left side
Right frequency range, and more than 1800 megahertzs of GSM etc., then this is not construed as limiting.
Wherein, the frequency range in the first band limits can be the frequency range in 1700 megahertzs or so of GSM, and be more than
GSM1700 megahertzs or in GSM1800 megahertzs or so of frequency range, and more than 1800 megahertzs of GSM etc., then this does not make
It limits.
Wherein, radio-frequency signal transceiver 60 has 850 megahertzs as original signal source, the frequency range of the radiofrequency signal usually emitted
Hereby, the one or more in 900 megahertzs, 1800 megahertzs, 1900 megahertzs etc..Mobile terminal can be in these band limits
Frequency is automatically switched according to network coverage situation, to ensure optimal using effect.
Wherein, antenna 10 is a kind of converter, it is transformed into the guided wave propagated on transmission line (logical in unbounded medium
Often free space) in the electromagnetic wave propagated or carry out opposite conversion.Antenna is for emitting or connecing in the terminal
Receive the component of electromagnetic wave.The engineering departments such as radio communication, broadcast, TV, radar, navigation, electronic countermeasure, remote sensing, radio astronomy
System, it is every to use electromagnetic waves to transfer information, antenna is depended on to work.In addition, transmitting energy side with electromagnetic wave
Face, the energy radiation of non-signal are also required to antenna.General antenna all has invertibity, i.e. the same antenna both can be used as emitting day
Line, it is also possible to make reception antenna.The same antenna is identical as transmitting or the fundamental characteristics parameter received.
Wherein, first switch 40, second switch 50 are tuning switch.
In the embodiment of the application, the first distributing point 12 is main distributing point, the second distributing point 13 is ground distributing point, the 3rd
Distributing point 14 is low frequency distributing point.
In the embodiment of the application, as shown in Fig. 2, the first distributing point 12 be placed in antenna radiator 11 first end point,
3rd distributing point 14 is placed in the second endpoint of antenna radiator 11, the second distributing point 13 is placed in the first distributing point 12 and the 3rd feed
Between point 14.
Specifically, due under low frequency operation, voltage is from the 3rd distributing point 13 toward antenna radiator other end (i.e. first
Distributing point) voltage is progressively reducing, so that tuning switch (i.e. the first tuning switch and second tune switch) is away from high electricity
Pressure, further avoids the radiation dispersion caused by tuning switch saturation.
As can be seen that in the embodiment of the present application, increase a low frequency distributing point (i.e. the 3rd distributing point), in low frequency operation
Under, low frequency energy is directly carried out spoke by the radiofrequency signal of radio-frequency signal transceiver transmitting by the low frequency distributing point and antenna
It penetrates, eliminates in low frequency operation, the high voltage of distributing point causes the situation of tuning switch saturation, and then inhibits radiation dispersion.
In the embodiment of the application, the first match circuit 20 is connected with first switch 40 and the first match circuit 20
Pass through the first distributing point 11 and the antenna 10；Second match circuit 30 is connected with second switch 50 and the second match circuit
30 are connected by the second distributing point 12 with antenna 10.It is specific as shown in Figure 2.
In the embodiment of the application, the first match circuit 20 is connected with first switch 40 and first switch 40 passes through
First distributing point 11 is connected with antenna 10；Second match circuit 30 is connected with second switch 50 and second switch 50 is by
Two distributing points 12 are connected with antenna 10.It is specific as shown in Figure 3.
In the embodiment of the application, the first match circuit 20 includes M matching sub-circuit, and the second match circuit 30 includes
N number of matching sub-circuit, M and N are positive integer.
In the embodiment of the application, when working frequency range is in the first band limits, in N number of matching sub-circuit at least
One matching sub-circuit conducting；Alternatively, the conducting of at least one matching sub-circuit and M matching son electricity in N number of matching sub-circuit
At least one matching sub-circuit conducting in road.
In the embodiment of the application, when working frequency range is in the second band limits, in M matching sub-circuit at least
One matching sub-circuit conducting.
In the embodiment of the application, when working frequency range is in three band limits, in N number of matching sub-circuit at least
At least one matching sub-circuit conducting in one matching sub-circuit conducting and M matching sub-circuit.
It should be noted that when at least one matching sub-circuit conducting, at least one matching sub-circuit access antenna,
To adjust the impedance of antenna so that the impedance of antenna is matched with the feed line impedance of distributing point, so that antenna tuning circuit work
Make in impedance matching condition.Matching sub-circuit can not only adjust the working frequency of antenna in high frequency, can also adjust antenna
Tuning circuit is in impedance matching condition.
In addition, matching sub-circuit can be single original paper, such as inductance or capacitance, it can also be by an inductance and two electricity
Hold composition π types match circuit or labyrinth, such as frequency electing and passing circuit, can also be other with identity function
Circuit, in addition without enumerating.Wherein, frequency electing and passing circuit can be equivalent to short circuit in low-frequency range, in high band etc.
It imitates in inductance or capacitance.In addition, the impedance of Different matching sub-circuit is different.Specifically, the structure of matching sub-circuit can refer to
Fig. 4, Fig. 4 are that the embodiment of the present application provides a kind of partial schematic diagram of antenna tuning circuit.
In the embodiment of the application, the matching sub-circuit of the first match circuit 20 is GSM850 megahertzs or 900 megahertzs
Hereby frequency band match sub-circuit, the matching sub-circuit of the second match circuit 30 is GSM1800 megahertzs of frequency band match sub-circuit.
In the embodiment of the application, the 3rd distributing point 13 is placed in an endpoint of antenna 10, the 3rd distributing point 13 and
The distance of one distributing point 11 and the second distributing point 12 is greater than or equal to setpoint distance.
Specifically, due in low frequency operation, the 3rd distributing point 13 be in a manner that electric field is fierce by low frequency energy into
Row radiation, so had and its powerful voltage signal in the 3rd distributing point 13, therefore in order to avoid high voltage causes first
The situation of switch 40 and 50 saturation of second switch, need to keep the first distributing point 11 and the second distributing point 12 with the 3rd distributing point 13
A certain distance.
Wherein, setpoint distance be research staff by test of many times obtain in the 3rd distributing point 13 and the first distributing point 11
When being greater than or equal to the value with the distance of the second distributing point 12, first switch and second switch are not in the situation of saturation.It should
Setpoint distance is less than the length of antenna 10.
In the embodiment of the application, antenna tuning circuit further includes the first filtering 80 and/or second filter 90, and first
It connects between the matching sub-circuit of match circuit 20 and first switch 40 first filter 80, matching of the second match circuit 30
Second filter of connecting between circuit and second switch 50 90, wave filter are used for the dominant frequency signal and the filtering that retain corresponding band
The harmonic wave that tuning switch generates.
Further, the 3rd distributing point 13 and the distance of the first distributing point 11 and the second distributing point 12 be less than setting away from
From the antenna tuning circuit further includes first filter 80 and second filter 90.
Further, it is less than the setpoint distance, the antenna in the distance of the 3rd distributing point 13 and the first distributing point 11
Tuning circuit further includes first filter 80.
Further, it is less than the setpoint distance, the antenna in the distance of the 3rd distributing point 13 and the second distributing point 12
Tuning circuit further includes second filter 90.
Wherein, first filter, second filter are low-pass filter.
Specifically, referring to Fig. 5, Fig. 5 is a kind of schematic diagram of antenna tuning circuit provided by the embodiments of the present application.Due to
In low frequency operation, the 3rd distributing point 13 is to radiate low frequency energy in a manner that electric field is fierce, so the 3rd
Distributing point 13 has and its powerful voltage signal.The 3rd distributing point 13 and the first distributing point 11 and the second distributing point 12 away from
It, may be there are the powerful voltage signal that the 3rd distributing point 13 generates in the second feedback of arrival in the case of from respectively less than setpoint distance
Still still there is powerful voltage signal when electricity point 12 and the first distributing point 11, so may result in first switch 40 and second and open
It closes 50 saturations and leads to the problem of radiation dispersion, therefore in order to avoid this kind of situation occurs, in the matching of the first match circuit 20
The matching sub-circuit of sub-circuit and the second match circuit 30 is connected a low-pass filter respectively, so that even if being opened in tuning
Harmonic wave is generated at pass, which can also filter out, and further solve the problems, such as radiation dispersion.
Fig. 6 is referred to, Fig. 6 is a kind of schematic diagram of antenna tuning circuit provided by the embodiments of the present application.Due in low frequency
During work, the 3rd distributing point 13 is to radiate low frequency energy in a manner that electric field is fierce, so in the 3rd distributing point
13 have and its powerful voltage signal.The feelings of setpoint distance are respectively less than in the distance of the 3rd distributing point 13 and the first distributing point 11
Under condition, the powerful voltage signal that may be generated there are the 3rd distributing point 13 still still has by force when reaching the first distributing point 11
Big voltage signal so may result in 40 saturation of first switch and lead to the problem of radiation dispersion, therefore in order to avoid this kind
Situation occurs, in matching sub-circuit one low-pass filter of series connection of the first match circuit 20, so that even if being opened in tuning
Harmonic wave is generated at pass, which can also filter out, and further solve the problems, such as radiation dispersion.
Fig. 7 is referred to, Fig. 7 is a kind of schematic diagram of antenna tuning circuit provided by the embodiments of the present application.Due in low frequency
During work, the 3rd distributing point 13 is to radiate low frequency energy in a manner that electric field is fierce, so in the 3rd distributing point
13 have and its powerful voltage signal.The feelings of setpoint distance are respectively less than in the distance of the 3rd distributing point 13 and the second distributing point 12
Under condition, the powerful voltage signal that may be generated there are the 3rd distributing point 13 still still has by force when reaching the second distributing point 12
Big voltage signal so may result in 50 saturation of second switch and lead to the problem of radiation dispersion, therefore in order to avoid this kind
Situation occurs, in matching sub-circuit one low-pass filter of series connection of the second match circuit 30, so that even if being opened in tuning
Harmonic wave is generated at pass, which can also filter out, and further solve the problems, such as radiation dispersion.
In the embodiment of the application, the tuning switch is appointing in single-pole double throw, single-pole three throw and hilted broadsword four-throw
Meaning is a kind of.
In the embodiment of the application, the antenna tuning circuit further includes control module 70,40 He of the first tuning switch
Second tune switch 50 is connected with control module 70, and the first tuning switch 40 and second tune switch 50 are for coming from receiving
In the case of the switching logic control signal of control module 70, corresponding matching electricity is selected based on switching logic control signal
Road.
Fig. 8 is referred to, Fig. 8 is that the embodiment of the present application provides a kind of antenna assembly, which includes power amplifier
And the antenna tuning circuit described in the various embodiments described above, the power amplifier are used for the radio frequency for sending radio-frequency signal transceiver
It is exported after signal amplification to antenna.
As shown in figure 8, antenna assembly provided by the embodiments of the present application is due to including the antenna tune described in the various embodiments described above
Humorous circuit, therefore antenna assembly equally has the advantageous effect identical with antenna tuning circuit.
The said goods can perform the antenna tuning circuit that the application any embodiment is provided, and it is corresponding to possess execution method
Function module and advantageous effect.The not technical detail of detailed description in the present embodiment, reference can be made to the application any embodiment institute
The antenna tuning circuit of offer.
Fig. 9 is referred to, Fig. 9 is that the embodiment of the present application provides a kind of mobile terminal, and the mobile terminal and upper including mainboard
Antenna assembly is stated, antenna assembly is connected with the mainboard.
As shown in figure 9, mobile terminal provided by the embodiments of the present application is due to including said antenna device, the antenna assembly bag
Include the antenna tuning circuit described in the various embodiments described above, therefore mobile terminal is equally with identical with antenna tuning circuit beneficial
Effect.It should be noted that the mobile terminal further includes the component that other support the mobile terminal to work normally, such as also wrap
Include touching display screen, processor, memory etc..
The said goods can perform the antenna tuning circuit that the application any embodiment is provided, and it is corresponding to possess execution method
Function module and advantageous effect.The not technical detail of detailed description in the present embodiment, reference can be made to the application any embodiment institute
The antenna tuning circuit of offer.
It should be noted that above-mentioned is only the preferred embodiment of the application and institute's application technology principle.Art technology
Personnel can be carried out various for a person skilled in the art it will be appreciated that the application is not limited to specific embodiment described here
The protection domain for significantly changing, readjusting and substituting without departing from the application.Therefore, although passing through above example pair
The application is described in further detail, but the application is not limited only to above example, is not departing from the application design
In the case of, other more equivalent embodiments can also be included, and scope of the present application is determined by scope of the appended claims.
Claims (20)
1. a kind of antenna tuning circuit, which is characterized in that opened including antenna, the first match circuit, the second match circuit, first
Pass, second switch and radio-frequency signal transceiver；
The antenna includes the first distributing point, the second distributing point and the 3rd distributing point that are arranged in order；First match circuit
It is connected on the first switch between first distributing point and ground, second match circuit is connected with the second switch
Between second distributing point and ground；
When working frequency range is in the first band limits, the radiofrequency signal of the radio-frequency signal transceiver transmitting passes through described first
Distributing point reaches the antenna, and the second switch conducting, the first switch disconnects or conducting；
When working frequency range is in the second band limits, the radiofrequency signal of the radio-frequency signal transceiver transmitting passes through described first
Distributing point reaches the antenna, the first switch conducting, and the second switch disconnects, the frequency range in second band limits
Less than the frequency range in first band limits；
When working frequency range is in three band limits, the radiofrequency signal of the radio-frequency signal transceiver transmitting passes through the described 3rd
Distributing point reaches the antenna, and the first switch and the second switch are both turned on, the frequency range in the 3rd band limits
Less than the frequency range in second band limits.
2. antenna tuning circuit according to claim 1, which is characterized in that first match circuit is opened with described first
Connection connects and first match circuit is connected by first distributing point with the antenna；Second match circuit
It is connected with the second switch and second match circuit is connected by second distributing point with the antenna.
3. antenna tuning circuit according to claim 1, which is characterized in that first match circuit is opened with described first
Connection connects and the first switch is connected by first distributing point with the antenna；Second match circuit and institute
It states second switch connection and the second switch is connected by second distributing point with the antenna.
4. according to claim 1-3 any one of them antenna tuning circuits, which is characterized in that first match circuit includes
M matching sub-circuit, second match circuit include N number of matching sub-circuit, and the M and the N are positive integer.
5. antenna tuning circuit according to claim 4, which is characterized in that be in the first frequency range model in working frequency range
When enclosing, at least one matching sub-circuit conducting in N number of matching sub-circuit；Alternatively, in N number of matching sub-circuit extremely
At least one matching sub-circuit conducting in few matching sub-circuit conducting and described M matching sub-circuit.
6. antenna tuning circuit according to claim 4 or 5, which is characterized in that be in the described second frequency in working frequency range
During segment limit, at least one matching sub-circuit conducting in the M matching sub-circuit.
7. according to claim 4-6 any one of them antenna tuning circuits, which is characterized in that be in described the in working frequency range
During three band limits, in the conducting of at least one matching sub-circuit and described M matching sub-circuit in N number of matching sub-circuit
At least one matching sub-circuit conducting.
8. according to claim 4-7 any one of them antenna tuning circuits, which is characterized in that the matching sub-circuit is by one
A inductance and two capacitance composition π type match circuits.
9. according to claim 4-7 any one of them antenna tuning circuits, which is characterized in that the matching sub-circuit is by single
Capacitance or single inductance composition.
10. according to claim 4-9 any one of them antenna tuning circuits, which is characterized in that the resistance of Different matching sub-circuit
Anti- difference.
11. according to claim 1-10 any one of them antenna tuning circuits, which is characterized in that first distributing point is placed in
The first end point of the antenna, the 3rd distributing point are placed in the second endpoint of the antenna.
12. according to claim 1-10 any one of them antenna tuning circuits, which is characterized in that the 3rd distributing point is placed in
The distance of the end point of the antenna, the 3rd distributing point and first distributing point and second distributing point is more than or waits
In setpoint distance.
13. according to claim 1-10 any one of them antenna tuning circuits, which is characterized in that the antenna tuning circuit is also
Including first filter and/or second filter, between the matching sub-circuit of first match circuit and the first switch
It connects the first filter, connects described second between the matching sub-circuit and the second switch of second match circuit
Wave filter, the wave filter are used for the dominant frequency signal for retaining the corresponding band and filter the humorous of the tuning switch generation
Ripple.
14. antenna tuning circuit according to claim 13, which is characterized in that in the 3rd distributing point and described first
The distance of distributing point and second distributing point is respectively less than the setpoint distance, and the antenna tuning circuit further includes the first filtering
Device and second filter.
15. antenna tuning circuit according to claim 13, which is characterized in that in the 3rd distributing point and described first
The distance of distributing point is less than the setpoint distance, and the antenna tuning circuit further includes first filter.
16. antenna tuning circuit according to claim 13, which is characterized in that in the 3rd distributing point and described second
The distance of distributing point is less than the setpoint distance, and the antenna tuning circuit further includes second filter.
17. according to claim 1-16 any one of them antenna tuning circuits, which is characterized in that the tuning switch is hilted broadsword
Any one in double-throw, single-pole three throw and hilted broadsword four-throw.
18. according to claim 1-17 any one of them antenna tuning circuits, which is characterized in that the antenna tuning circuit is also
Including control module, the tuning switch is connected with the control module, and the tuning switch is used to receive from described
In the case of the switching logic control signal of control module, corresponding matching electricity is selected based on the switching logic control signal
Road.
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 radio-frequency signal transceiver amplification to institute
State antenna.
20. a kind of mobile terminal, which is characterized in that the mobile terminal including mainboard and the antenna assembly as described in 19,
The antenna assembly is connected with the mainboard.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371309.1A CN108110423B (en) | 2017-12-14 | 2017-12-14 | Antenna tuning circuit, antenna device and mobile terminal |
| PCT/CN2018/119757 WO2019114622A1 (en) | 2017-12-14 | 2018-12-07 | Antenna tuning circuit, antena apparatus and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711371309.1A CN108110423B (en) | 2017-12-14 | 2017-12-14 | Antenna tuning circuit, antenna device and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108110423A true CN108110423A (en) | 2018-06-01 |
| CN108110423B CN108110423B (en) | 2020-03-10 |
Family
ID=62211024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711371309.1A Expired - Fee Related CN108110423B (en) | 2017-12-14 | 2017-12-14 | Antenna tuning circuit, antenna device and mobile terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108110423B (en) |
| WO (1) | WO2019114622A1 (en) |
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| WO2019114622A1 (en) * | 2017-12-14 | 2019-06-20 | Oppo广东移动通信有限公司 | Antenna tuning circuit, antena apparatus and mobile terminal |
| CN110444885A (en) * | 2019-08-28 | 2019-11-12 | Oppo（重庆）智能科技有限公司 | A kind of antenna module, mobile phone, control method and electronic equipment |
| CN110718761A (en) * | 2018-07-11 | 2020-01-21 | 华为技术有限公司 | Antenna device and mobile terminal |
| CN110970706A (en) * | 2019-11-20 | 2020-04-07 | 珠海格力电器股份有限公司 | Multimode antenna, terminal, communication method and device of multimode antenna and processor |
| CN112350054A (en) * | 2019-08-09 | 2021-02-09 | 青岛海信移动通信技术股份有限公司 | Mobile terminal |
| CN112397902A (en) * | 2020-10-23 | 2021-02-23 | Oppo广东移动通信有限公司 | Antenna and impedance matching method and terminal thereof |
| CN112882375A (en) * | 2019-11-29 | 2021-06-01 | RealMe重庆移动通信有限公司 | Wearable electronic equipment |
| CN113471696A (en) * | 2021-07-20 | 2021-10-01 | 南昌黑鲨科技有限公司 | Antenna |
| CN114122683A (en) * | 2020-08-28 | 2022-03-01 | 华为技术有限公司 | Antenna system and electronic device |
| CN115118302A (en) * | 2021-03-23 | 2022-09-27 | Oppo广东移动通信有限公司 | Antenna device and electronic apparatus |
| WO2024061280A1 (en) * | 2022-09-23 | 2024-03-28 | 维沃移动通信有限公司 | Antenna module and electronic device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108110423B (en) | 2020-03-10 |
| WO2019114622A1 (en) | 2019-06-20 |
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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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