CN109660267A - A kind of antenna system and mobile terminal - Google Patents
A kind of antenna system and mobile terminal Download PDFInfo
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- CN109660267A CN109660267A CN201811502831.3A CN201811502831A CN109660267A CN 109660267 A CN109660267 A CN 109660267A CN 201811502831 A CN201811502831 A CN 201811502831A CN 109660267 A CN109660267 A CN 109660267A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/005—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
- H04B1/0053—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band
- H04B1/0057—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using diplexing or multiplexing filters for selecting the desired band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention provides a kind of antenna system and mobile terminals, and wherein antenna system includes: the radio frequency signal transmission line road under first network standard；Adjustable harmonic suppression circuit is connect with radio frequency signal transmission line road；Control switch is connected on adjustable harmonic suppression circuit to the connection line on radio frequency signal transmission line road；Controller, it is separately connected with control switch and adjustable harmonic suppression circuit, controller, it is separately connected with control switch and adjustable harmonic suppression circuit, controller is used for: in the case that working frequency range of the mobile terminal under first network standard is in the working frequency range of the second network formats of interference, controlling control switch is in closed state, and adjusts the harmonics restraint frequency of adjustable harmonic suppression circuit.The interference to the radio-frequency performance of other frequency ranges under first network standard is reduced while promoting inhibitory effect, in maximum likelihood.
Description
Technical field
The present invention relates to field of communication technology more particularly to a kind of antenna system and mobile terminals.
Background technique
The communication technology develops from 2G to 3G to 4G at present, has evolved to the 5th third-generation mobile communication at present, abbreviation 5G,
Higher bandwidth is needed to realize the requirement of high data rate.Since 2G/3G/4G has occupied a large amount of bandwidth, 5G
Resource of frequency range alternative is by severe crush.And under existing 5G standard application, whens some 4G band operations, can give one
5G frequency range is divided to bring biggish interference, the final sensitivity for influencing to rewrite 5G frequency range influences the actual downloading rate of 5G, call matter
The indexs such as amount.
For above problem, there are two types of solutions at present:
One is in LTE band operation, it is desirable that 5G frequency range tripping LTE frequency range second harmonic of the part vulnerable to interference
Frequency range avoids interference of the LTE frequency range to 5G frequency range by hopping.And this kind of scheme, due to needing to avoid harmonic wave
The influence of frequency executes hopping, and the usable frequency that will lead to 5G frequency range tails off, and can actually reduce the actual transmissions speed of 5G
Rate cannot achieve the requirement of high data rate.And the frequency that the program needs base station cooperation to use 5G frequency range is far from 4G frequency range
Harmonic frequency, it is possible that because of no available frequency band or switching bring disconnection.
Another method is that low-pass filter network is added in radio-frequency front-end, by inhibiting LTE harmonic wave, to reduce to 5G frequency range
Interference strength.And this kind of scheme will then generate higher insertion loss when harmonics restraint is higher on LTE fundamental wave, it can shadow
The output power for ringing LTE frequency range, if to need lower insertion loss in LTE frequency range, to LTE frequency range harmonics restraint meeting
It is deteriorated very much, it is difficult to realize inhibitory effect；And this kind of scheme be while filtering out interference, also to other frequencies under 4G network formats
The radio-frequency performance of section generates upset, impacts to the signal transmission under 4G frequency range.
Summary of the invention
The embodiment of the present invention provides a kind of antenna system and mobile terminal, to solve to solve the scheme of interference in the prior art
In the presence of compression the 5G resource of frequency range, go offline, larger to 4G network insertion loss, interference suppressioning effect is poor, under 4G network formats
The radio-frequency performance of other frequency ranges generates the problems such as upset.
In order to solve the above-mentioned technical problem, the present invention is implemented as follows:
In a first aspect, being applied to mobile terminal, the antenna system packet the embodiment of the invention provides a kind of antenna system
It includes:
Radio frequency signal transmission line road under first network standard；
Adjustable harmonic suppression circuit is connect with the radio frequency signal transmission line road；
Control switch is connected to the connection line of the adjustable harmonic suppression circuit to the radio frequency signal transmission line road
On；
Controller is separately connected with the control switch and the adjustable harmonic suppression circuit, and the controller is used for: when
Working frequency range of the mobile terminal under the first network standard is in the feelings of the working frequency range of the second network formats of interference
Under condition, the control switch is controlled in closed state, and adjust the harmonics restraint frequency of the adjustable harmonic suppression circuit；It is no
Then, the control switch is controlled in off-state.
Second aspect, the embodiment of the invention also provides a kind of mobile terminals, including antenna system as described above.
In embodiments of the present invention, by the way that adjustable harmonic wave is arranged on the radio frequency signal transmission line road under first network standard
Suppression circuit, and under the control of the controller, the modulation to harmonic suppression circuit rejection is realized, in control switch in closure
When state, according to the working condition on the radio frequency signal transmission line road under first network standard, modulation goes out different harmonics restraint energy
Power realizes the inhibition to the harmonic wave generated in the radio frequency signal transmission line road, promotes inhibitory effect, and in mobile terminal first
When being not in the frequency range of the working frequency range generation interference to the second network formats under network formats, control control switch is disconnected,
Reduced while realizing harmonic restraining function, in maximum likelihood under first network standard the radio-frequency performance of other frequency ranges it is dry
It disturbs.
Detailed description of the invention
Fig. 1 shows a kind of circuit structure diagrams of antenna system in the embodiment of the present invention；
Fig. 2 indicates the inspection table of harmonic frequency range and variable capacitance in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The present invention discloses a kind of antenna system in implementing, and is applied to mobile terminal, as shown in connection with fig. 1, the antenna
System includes:
Radio frequency signal transmission line road under first network standard；
Adjustable harmonic suppression circuit is connect with the radio frequency signal transmission line road；
Control switch is connected to the connection line of the adjustable harmonic suppression circuit to the radio frequency signal transmission line road
On；
Controller is separately connected with the control switch and the adjustable harmonic suppression circuit, and the controller is used for: when
Working frequency range of the mobile terminal under the first network standard is in the feelings of the working frequency range of the second network formats of interference
Under condition, the control switch is controlled in closed state, and adjust the harmonics restraint frequency of the adjustable harmonic suppression circuit；It is no
Then, the control switch is controlled in off-state.
The radio frequency signal transmission line road is route corresponding with first network standard in mobile terminal, for penetrating according to this
Frequency signal transmission line realizes the signal transfer function under first network standard in the terminal.
The mobile terminal is the terminal for supporting first network standard and the second network formats to run parallel.
Wherein, working frequency range of the mobile terminal under the first network standard is in the work of the second network formats of interference
In the case where frequency range, specifically: when mobile terminal works under first network standard and the second network formats simultaneously, when first
Work at present frequency range under network formats is the case where generating interference to the work at present frequency range under the second network formats.Its
In, the work at present frequency range under the first network standard is that interference packet can be generated to the work at present frequency range under the second network formats
Include: the harmonic signal generated in the work at present frequency range under first network standard is to the work at present frequency range under the second network formats
In fundamental signal generate interference.Such as: tranmitting frequency range is 1710MHz-1785MHz, frequency multiplication frequency in LTE B3 frequency range
For 3420MHz-3570MHz, just fall in the bandwidth of the N77 and N78 frequency range under 5G standard.It is current under first network standard
The frequency multiplication frequency of tranmitting frequency is fallen into the bandwidth frequency under the second network formats in working frequency range.Mobile terminal is in first network
The harmonic wave in working frequency range under standard generates interference to the working frequency range signal transmitting under the second network formats.
In the antenna system, adjustable harmonic suppression circuit is connect with the radio frequency signal transmission line road under first network standard,
And under the control of the controller, it realizes to the change of the harmonics restraint performance of adjustable harmonic suppression circuit, is embodied in institute
The modulation for the harmonics restraint frequency that can be provided is realized with providing different harmonic inhibition capabilities to penetrating under first network standard
The harmonic wave generated in frequency signal transmission line filters out, when control switch is in closed state, according under first network standard
The service condition on radio frequency signal transmission line road, modulation go out different harmonic inhibition capabilities and realize in the radio frequency signal transmission line road
The inhibition of the harmonic wave of generation promotes inhibitory effect.
Wherein, the working frequency range of control switch being opened or closed with mobile terminal under first network standard is in interference
Be Rule of judgment in the case where the working frequency range of second network formats, when mobile terminal under first network standard in interference the
When the default frequency range of the working frequency range of two network formats, then control switch is needed to be closed, so that adjustable harmonic suppression circuit is opened
Work, to filter out mobile terminal, harmonic wave does signal transmitting under the second network formats in locating frequency range under first network standard
It disturbs, and is not in the default frequency range of the working frequency range of second network formats of interference under first network standard in mobile terminal
When, control control switch disconnects, and while realizing harmonic restraining function, reduces in maximum likelihood under first network standard
The interference of the radio-frequency performance of other frequency ranges.
Wherein, the premise " otherwise " that the control switch is in off-state is controlled, comprising: when mobile terminal is in first network
In the case that working frequency range under standard is the frequency range for not generating interference to the working frequency range of the second network formats or the second net
Network standard is in unused state.
Preferably, wherein the first network standard is 4G network formats, and the second network formats are 5G network formats.That is, working as
When in the case that working frequency range of the mobile terminal under 4G network formats is in the working frequency range for interfering 5G standard, the control is controlled
System switch is in closed state, and adjusts the adjustable harmonic suppression circuit harmonics restraint frequency；When the mobile terminal is in 4G net
When working frequency range under network standard is not in the case where the working frequency range of interference 5G standard, then the control switch is controlled in disconnected
Open state.On the basis of not reducing 5G frequency range actual speed rate, pass through the parallel connection one on the radio frequency signal transmission line road of 4G network
A adjustable network filters out the harmonic components of long term evolution (Long Term Evolution, LTE), so as to improve LTE
The harmonic wave of frequency range, intermodulation product, harmonic mixing interference signal enter 5G and receive 5G receiving sensitivity caused by frequency range and decline.And
When the radio frequency signal transmission line road of 4G network is when other transmit LTE band operation without harmonic wave interference to 5G signal, then turn off
The filter network reduces the influence to work other radio frequency bands.It is final to realize that 4G frequency range and 5G frequency range work at the same time, and performance
Nothing is decreased obviously.
Wherein, as a preferred embodiment, wherein as shown in connection with fig. 1, this is adjustable, and harmonic suppression circuit includes: string
The tunable capacitor C1 of connection and the first inductance L1；One end of the tunable capacitor C1 is connected to the control switch, first electricity
Feel one end ground connection of L1；The controller adjusts the capacitance of the tunable capacitor C1, to adjust the adjustable harmonics restraint electricity
The harmonics restraint frequency on road.
As shown in connection with fig. 1, the filter network of harmonic wave is constituted with one group of L (inductance) C (capacitor) series resonance.Wherein C1 is
Variable capacitance.The capacitance of C1 is adjusted by external control signal, to change harmonics restraint frequency.It is adjustable by increasing by one
Capacitor realizes the adjustability of harmonic suppression circuit.
For band segment in LTE standard there are harmonic wave, to interference in 5G frequency range bring band, in the present embodiment by
LTE radio signal transmssion line road increases a switch O and one group of harmonic suppression network, and wherein harmonic suppression network passes through control
End A comes the opening and shutdown of control switch O, and adjusts the capacitance of variable capacitance, and then to adjust harmonic suppression network institute energy
The harmonics restraint frequency of offer.
When LTE interference band works, mobile terminal is taken the mobile phone as an example for real work, and mobile phone is according to the interference frequency point of storage
And corresponding harmonic nests capacitance chooses corresponding capacitance, and opens the switch of harmonic suppression circuit, to filter out LTE
The secondary and triple-frequency harmonics of frequency range reduces the interference that frequency range is received to 5G；If LTE frequency range currently in use is not stored in mobile phone
Interference band within, then close the switch of filter network, do not influence the normal radio frequency performance of LTE frequency range.
Correspondingly, the working frequency range when the mobile terminal under the first network standard is in the second net of interference
When in the case where the working frequency range of network standard, the controller adjusts the harmonics restraint frequency of the adjustable harmonic suppression circuit,
Include:
Obtain mobile terminal working channel locating in the working frequency range under the first network standard；It is set from one
In the fixed harmonics restraint table of comparisons, the target capacitance value of the tunable capacitor corresponding with the working channel is searched；Adjust institute
The capacitance for stating tunable capacitor is the target capacitance value.
According to the different channels of interference band, pass through pair of the variable capacitance and harmonics restraint that are previously stored in mobile terminal
It should be related to call different capacitances, dynamically can filter out harmonic wave for frequency point, so as to realize better harmonic wave
Rejection ability, and the radio-frequency performance of fundamental wave is not influenced.
Wherein, a target capacitance value corresponds to a range of channel's number, and channel number falls into a channel number
When in range, then it is assumed that when working channel of the mobile terminal under first network standard is channel corresponding with the channel number
When, confirm target capacitance value, is a target capacitance value corresponding with a range of channel's number.
By taking LTE B3 band interference as an example, the inspection table of harmonic frequency range and variable capacitance is as shown in Fig. 2, i.e. harmonic wave
Inhibit the table of comparisons.It wherein, is N77 by the 5G frequency range of LTE B3 band interference.For channel different in LTE B3 frequency range, use
The parameter value of different variable capacitances, the other assemblies in adjustable harmonic suppression circuit immobilizes.Actual effect sees, for
The Insertion Loss of fundamental wave can receive all in 0.5dB hereinafter, to show that LTE signal is influenced by the matching network smaller.In harmonic wave 40MHz
Harmonics restraint in bandwidth signal all in 40dB or more, for fundamental wave Insertion Loss all in 0.5dB hereinafter, meeting N77 under 5G standard
The impregnable theoretical calculation requirement of UHF band reception sensitivity.
Wherein, after the step of capacitance for adjusting the tunable capacitor is the target capacitance value, further includes:
When setting time interval reaches, returns and execute the acquisition mobile terminal under the first network standard
Working frequency range in locating working channel the step of.To ensure to obtain in time after working channel changes and make capacitor
The adjustment of value.
It is further preferred that as shown in connection with fig. 1, this is adjustable harmonic suppression circuit further include: at least one set of in parallel second
Capacitor C2 and the second inductance L2 is connected between the ground terminal and ground of the first inductance L1.
In the structure, harmonic network is constituted with one group of LC series resonance and at least one set LC series resonant network.?
On LTE HW highway, parallel filtering network constitutes two stage filter network using two groups of LC networks, and wherein capacitor is tunable capacitor.
The first order of filter network is series resonant network, and the frequency for filtering out the needs selected filters, and main indicator is to mention
The rejection ability of higher harmonics；The second level is LC series resonant network, mainly lesser Insertion Loss is provided for fundamental wave, simultaneously for humorous
Wave has certain inhibition.Can be effectively higher for the harmonic wave of LTE band segment, need the scene of the higher harmonics restraint of frequency.
Wherein C1 capacitor is adjustable condenser, other are fixed value capacitor and inductor.
Further, which includes: the common transmission route of emission of radio frequency signals, and the control is opened
Connection is connected to the common transmission route；Or the radio frequency signal transmission line road includes: multiple emission of radio frequency signals accesses, institute
The working frequency range for stating multiple emission of radio frequency signals accesses is different；The control switch is respectively connected to the multiple radiofrequency signal hair
Penetrate each emission of radio frequency signals access in access.
The common transmission route of the emission of radio frequency signals, the radiofrequency signal of different frequency range passes specially under first network standard
Defeated route summarize after route, control switch is connected to the common transmission route, is penetrated with realizing in common end to different frequency range
The harmonic wave interference that frequency signal generates when transmitting rationally is inhibited.
Either control switch is connected on the different each emission of radio frequency signals access of the working frequency range, with can be with
The harmonic wave interference generated when targetedly to the radio signal transmission of any one working frequency range is rationally inhibited, and harmonic wave is enhanced
The accuracy of interference filtering.
Further, when the radio frequency signal transmission line road includes: the common transmission route of emission of radio frequency signals, in conjunction with
Shown in Fig. 1, the adjustable harmonic suppression circuit further include: it is arranged in series in the third inductance L3 on the common transmission route,
And one end is connected on the common transmission route, the third capacitor C3 of other end ground connection.
The third inductance can be with third capacitor and combine with two schemes in aforementioned embodiments, filter network
The first order is series resonant network, and the frequency for filtering out the needs selected filters, and main indicator is the suppression of harmonic wave to be improved
Ability processed；The second level is LC series resonant network, mainly provides lesser Insertion Loss for fundamental wave, has simultaneously for harmonic wave certain
Inhibit；The third level is general series connection low-pass filter network, the impedance of radio frequency network is mainly withdrawn into 50 ohm, thus band
Carry out Insertion Loss in lower band, while also having certain inhibitory effect to the harmonic wave outside band.With one group of LC series resonance and one group of LC
Series resonant network constitutes harmonic network, while plus the low-pass filter network (series electrical that radio frequency path can normally be added
Feel the scheme of shunt capacitance), substantially all scenes can be directed to, it is relatively low with interior Insertion Loss, harmonics restraint is also smaller.
Further, as a preferred embodiment, wherein controller is also used to be periodically detected the mobile terminal
Whether it is in setting strength range in the network signal intensity under second network formats；If being not at the setting intensity
In range, then by the capacitance modulation of the tunable capacitor to other target capacitance values, until under second network formats
Network signal intensity is in the setting strength range.
The process, controller may be implemented to realize according to the network signal intensity under the second network formats to first network
The adjustment for the harmonic frequency that the adjustable harmonic suppression circuit of radio frequency signal transmission line road connection under standard is able to suppress, specifically
For by the modulation of the capacitance to tunable capacitor, realize in the case that different application environment and, can ensure harmonics restraint energy
Power optimizes, and reduces the interference to signal under the second network formats.
Further, it is preferable to ground, which is also used to: determining the mobile terminal under second network formats
Network signal intensity is in set in strength range a capacitance as optimum capacitance value；Modify the harmonics restraint pair
According in table, target capacitance value corresponding to the working channel is the optimum capacitance value.
The process is combined with above-mentioned capacitance modulation process, during modulation capacitance, by the second network formats
Under network signal intensity be in a capacitance setting in strength range and record as optimum capacitance value, and by the value to control
In table, to guarantee to enter optimal harmonic filtration state in adjustment next time.
Further, it is preferable to ground, in the respective embodiments described above, the capacitance modulation range of tunable capacitor is preferably between
0.5pf is between 15pf.But not limited to this.
In conjunction with the application process of mobile phone, the above process is described.
Firstly, user mobile phone is switched on, normal registration searches net (mobile phone supports 4G/5G business)；Interior of mobile phone detection is resident
Frequency range and channel information, into downstream；Mobile phone detects whether to be registered in 4G/5G frequency range simultaneously, if it is while using 4G/
5G network, then mobile phone uses 4G/5G network simultaneously, then the 4G/5G harmonics restraint inspection table of calling mobile phone storage inside, i.e. harmonic wave
Inhibit the table of comparisons, the frequency range and channel of the 4G used and 5G that mobile phone is detected are compareed with harmonics restraint inspection table, if full
The corresponding channel for requiring, then using for 4G of the 4G frequency range and 5G frequency range of sufficient harmonics restraint inspection table, inquires variable condenser
Capacitance, mobile phone are controlled by voltage, to control the capacitance of variable condenser to the capacitance of harmonics restraint inspection table requirement,
Capacitance, which changes, to be completed.Purpose is just for there is the frequency range mutually interfered to come using harmonics restraint, on other frequency ranges without influence.Mobile phone
By control command, switching circuit in parallel on radio frequency signal transmission circuit under 4G standard is opened, harmonics restraint is connected and filters net
Network filters out interference of the harmonic wave of institute's working frequency under 4G standard to institute's working frequency under 5G standard；The normal work of harmonic suppression network
Make, mobile phone detects the received signal strength indicator RSSI value of internal 5G signal, whether normal RSSI is checked, to judge that 5G is sensitive
Whether degree receives interference.If RSSI signal is normal, expression does not receive interference signal influence, then detects mobile phone every the set time
The frequency range and channel used, and it is corresponding with harmonics restraint inspection table whether consistent, if it is, again by above-mentioned calling mobile phone
The 4G/5G harmonics restraint inspection table of portion's storage, which check, to be started, and executes the above process, it is therefore an objective to which operating handset is for a period of time
Afterwards, if channel switches, by detection to determine whether also needing harmonic suppression network；If RSSI abnormal signal, indicate
Harmonic suppression network also needs to optimize, it is determined that mobile phone RSSI signal is affected, then adjusted by ordering can power transformation for mobile phone
Capacitor value can be adjusted using step-by-step method, and each adjusted value can be adjustment 0.1V；It can power transformation by stepping 0.1V adjusting
After capacitor value, mobile phone itself detects whether 5G RSSI signal is normal, and what mobile phone will eventually determine if normal can power transformation
Capacitor value and corresponding 4G and 5G frequency range and channel, and update and arrive harmonics restraint inspection table, switching circuit in parallel is opened,
Harmonic suppression network is started to work.Purpose is to optimize the parameter of harmonic suppression network by the continuous renewal in actual use.
If mobile phone itself detection 5G RSSI signal is still abnormal, mobile phone continues through order to adjust variable capacitance capacitor value, after
It is continuous to step through mobile phone command according to 0.1V to adjust variable capacitance capacitor value.After circulation setting number, such as 5 times, hand
Machine judges the RSSI signal strength under 5 adjustment to determine the corresponding variable capacitance capacitor value of selection.
A kind of mobile terminal is also disclosed in the embodiment of the present invention, including as above described in any item antenna systems.
For secondary and triple-frequency harmonics existing for band segment in LTE standard, interference problem in 5G frequency range bring band is given,
Network is mainly inhibited by the 4G dynamic harmonic built on HW highway, to inhibit to have interference to 5G UHF band reception sensitivity
Harmonic wave, so as to allow 4G and 5G network to work at the same time, and do not lose 5G channel utilized bandwidth and transmission rate.
Capacitance by controlling variable capacitance is inhibited to be directed to the harmonic wave of 4G band operation frequency point, different 4G works
Make the different variable capacitance of value, to improve inhibitory effect.By switching circuit in parallel, determination will not be to 5G in 4G
The frequency range for generating harmonic wave interference, then close the harmonic network, to avoid the influence to other frequency range performances.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form belongs within protection of the invention.
Above-described is the preferred embodiment of the present invention, it should be pointed out that the ordinary person of the art is come
It says, can also make several improvements and retouch under the premise of not departing from principle of the present invention, these improvements and modifications also exist
In protection scope of the present invention.
Claims (10)
1. a kind of antenna system, it is applied to mobile terminal, which is characterized in that the antenna system includes:
Radio frequency signal transmission line road under first network standard；
Adjustable harmonic suppression circuit is connect with the radio frequency signal transmission line road；
Control switch is connected on the adjustable harmonic suppression circuit to the connection line on the radio frequency signal transmission line road；
Controller is separately connected with the control switch and the adjustable harmonic suppression circuit, and the controller is used for: when described
In the case that working frequency range of the mobile terminal under the first network standard is in the working frequency range of the second network formats of interference,
The control switch is controlled in closed state, and adjusts the harmonics restraint frequency of the adjustable harmonic suppression circuit；Otherwise, it controls
The control switch is in off-state.
2. antenna system according to claim 1, which is characterized in that the adjustable harmonic suppression circuit includes: concatenated
Tunable capacitor and the first inductance；One end of the tunable capacitor is connected to the control switch, a termination of first inductance
Ground；
The controller adjusts the capacitance of the tunable capacitor, to adjust the harmonics restraint frequency of the adjustable harmonic suppression circuit
Rate.
3. antenna system according to claim 2, which is characterized in that when the mobile terminal is in the first network standard
Under working frequency range be in the working frequency range of the second network formats of interference in the case where, the controller adjusts the adjustable harmonic wave
The harmonics restraint frequency of suppression circuit, comprising:
Obtain mobile terminal working channel locating in the working frequency range under the first network standard；
From the harmonics restraint table of comparisons of a setting, the target capacitance of the tunable capacitor corresponding with the working channel is searched
Value；
The capacitance for adjusting the tunable capacitor is the target capacitance value.
4. antenna system according to claim 3, which is characterized in that
The controller is also used to be periodically detected network signal intensity of the mobile terminal under second network formats
Whether in setting strength range；
If being not in the setting strength range, by the capacitance modulation of the tunable capacitor to other target capacitance values,
Until the network signal intensity under second network formats is in the setting strength range.
5. antenna system according to claim 4, which is characterized in that the controller is also used to:
Determine that the mobile terminal is in the setting strength range in the network signal intensity under second network formats
A capacitance be optimum capacitance value；
It modifies in the harmonics restraint table of comparisons, target capacitance value corresponding to the working channel is the optimum capacitance value.
6. antenna system according to claim 2, which is characterized in that the adjustable harmonic suppression circuit further include: at least
One group of second capacitor and the second inductance in parallel, are connected between the ground terminal and ground of first inductance.
7. antenna system according to claim 1, which is characterized in that the radio frequency signal transmission line road includes: radio frequency letter
The common transmission route of number transmitting, the control switch is connected to the common transmission route；Or
The radio frequency signal transmission line road includes: multiple emission of radio frequency signals accesses, the multiple emission of radio frequency signals access
Working frequency range is different；The control switch is respectively connected to the hair of each radiofrequency signal in the multiple emission of radio frequency signals access
Penetrate access.
8. antenna system according to claim 7, which is characterized in that
When the radio frequency signal transmission line road includes: the common transmission route of emission of radio frequency signals, the adjustable harmonics restraint
Circuit further include: be arranged in series on the common transmission route third inductance and one end be connected to the common transmission line
On the road, the third capacitor of other end ground connection.
9. antenna system according to claim 1, which is characterized in that the first network standard is 4G network formats, institute
Stating the second network formats is 5G network formats.
10. a kind of mobile terminal, including such as the described in any item antenna systems of claim 1-9.
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| CN201811502831.3A CN109660267A (en) | 2018-12-10 | 2018-12-10 | A kind of antenna system and mobile terminal |
| PCT/CN2019/122915 WO2020119538A1 (en) | 2018-12-10 | 2019-12-04 | Antenna system and mobile terminal |
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| CN201811502831.3A CN109660267A (en) | 2018-12-10 | 2018-12-10 | A kind of antenna system and mobile terminal |
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| WO2020119538A1 (en) | 2020-06-18 |
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