CN107124192B - A kind of radio circuit and mobile terminal - Google Patents
A kind of radio circuit and mobile terminal Download PDFInfo
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- CN107124192B CN107124192B CN201710297569.2A CN201710297569A CN107124192B CN 107124192 B CN107124192 B CN 107124192B CN 201710297569 A CN201710297569 A CN 201710297569A CN 107124192 B CN107124192 B CN 107124192B
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- filter
- standing wave
- mobile terminal
- load
- radio circuit
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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
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- 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
- H04B1/16—Circuits
- H04B1/18—Input circuits, e.g. for coupling to an antenna or a transmission line
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Telephone Function (AREA)
Abstract
The embodiment of the present invention provides a kind of radio circuit and mobile terminal, radio circuit includes filter, matching module and standing wave adjuster, the output end of filter is connected with the input terminal of matching module, and standing wave adjuster is connected with the input terminal of the output end of filter and matching module respectively；When the load of mobile terminal is antenna, standing wave adjuster adjusts the standing wave of the load of filter, and matching module matches the output end phase of filter, so that the output terminal impedance of filter is matched with the holding of the load impedance of filter.When the load of mobile terminal is antenna, the embodiment of the present invention can guarantee that the output terminal impedance of filter in mobile terminal is matched with the load impedance of filter always, improve the efficiency and output power of power amplifier, effectively reduce power consumption and calorific value of the mobile terminal under coupling and state, and structure is simple, occupied space and Insertion Loss are small, it is at low cost.
Description
Technical field
The present invention relates to field of circuit technology, more particularly to a kind of radio circuit and a kind of mobile terminal.
Background technique
Mobile terminal is generally in conducted state or coupling and state.Wherein, mobile when mobile terminal is in conducted state
The load of terminal is instrument, under the state, the load emission ratio very little of mobile terminal, and the port Impedance and instrument of mobile terminal
Port Impedance almost match.When mobile terminal is in coupling and state, the load of mobile terminal is antenna, mobile terminal
Load standing wave it is larger, the port Impedance of mobile terminal and the port Impedance mismatch of antenna are serious.The load of mobile terminal hinders
Anti- mismatch will lead to the load impedance mismatch of power amplifier, and the efficiency and output power of power amplifier are low, and mobile terminal
Power consumption and calorific value it is big.
The prior art makes mobile terminal realize load impedance under conducted state and coupling and state by following scheme
Matching:
As shown in Figure 1, the program is switched according to the current working frequency range selection of mobile terminal and match group, to adjust antenna
Feedback place and feedback ground matching, to change the working frequency of antenna.
But load impedance matching scheme in the prior art there is problems: can only reduce to a certain extent
The load impedance mismatch problems of mobile terminal, improve the efficiency of antenna, and can not make the port Impedance and antenna of mobile terminal
Port Impedance exact matching.
Summary of the invention
In view of the above problems, the embodiment of the present invention is designed to provide a kind of radio circuit and a kind of mobile terminal, with
Solve the problems, such as that the matching scheme of the prior art can not be such that the port Impedance of mobile terminal and the port Impedance of antenna exactly matches.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of radio circuits, are applied to mobile terminal, described to penetrate
Frequency circuit includes filter, matching module and standing wave adjuster, wherein the output end of the filter and the matching module
Input terminal is connected, and the standing wave adjuster is connected with the input terminal of the output end of the filter and the matching module respectively；
When the load of the mobile terminal is antenna, the standing wave adjuster adjusts the standing wave of the load of the filter, and described
It is matched with output end phase of the module to the filter, so that the output terminal impedance of the filter and the filter
Load impedance keep matching.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of mobile terminals, including the radio circuit.
The embodiment of the present invention includes following advantages: by increasing standing wave adjuster in radio circuit, and filter is arranged
Output end be connected with the input terminal of matching module, the input with the output end of filter and matching module respectively of standing wave adjuster
End is connected, and when the load of mobile terminal is antenna, i.e., when mobile terminal is in coupling and state, is adjusted by standing wave adjuster
The standing wave of the load of filter, and then matched by output end phase of the matching module to filter, so that filter
Output terminal impedance is matched with the holding of the load impedance of filter.In this way, the present invention is implemented when mobile terminal is in coupling and state
Example can guarantee that the output terminal impedance of filter in mobile terminal is matched with the load impedance of filter always, that is, guarantee mobile whole
The load impedance of end port is matched with the load impedance of antenna port always, and this improves the efficiency of power amplifier and defeated
Power out effectively reduces power consumption and calorific value of the mobile terminal under coupling and state.
Detailed description of the invention
Fig. 1 is the load impedance matching schematic diagram of mobile terminal in the prior art；
Fig. 2 is a kind of structural block diagram of radio circuit embodiment of the invention；
Fig. 3 is a kind of structural block diagram of radio circuit specific embodiment of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig. 2, it illustrates a kind of structural block diagram of radio circuit embodiment of the invention, which can be answered
For mobile terminal, for example, mobile phone, tablet computer, personal digital assistant (PDA, Personal Digital Assistant),
Vehicle-mounted computer, intelligent wearable device or navigator etc..
Referring to Fig. 2, which can specifically include following module: filter 10, matching module 20 and standing wave are adjusted
Device 30 etc., wherein the output end of filter 10 is connected with the input terminal of matching module 20, standing wave adjuster 30 respectively with filter
10 output end is connected with the input terminal of matching module 20；When the load of mobile terminal is antenna, i.e., when mobile terminal is in
When coupling and state (such as holding state, free space state, number of people state etc.), standing wave adjuster 30 adjusts the negative of filter 10
The standing wave of load, matching module 20 match the output end phase of filter 10 so that the output terminal impedance of filter 10 with
The load impedance of filter 10 keeps matching.
Specifically, when the output terminal impedance of filter 10 is matched with the load impedance of filter 10, filter 10 it is defeated
The reflection coefficient of outlet and the load reflection coefficient of filter 10 are conjugated, at this point, the output end standing wave and filter of filter 10
10 load standing wave is equal, the load reflection coefficient phase phase of the reflection coefficient phase and filter 10 of the output end of filter 10
Instead.
In this way, the embodiment of the present invention can guarantee filter 10 in mobile terminal when mobile terminal is in coupling and state
Output terminal impedance matched always with the load impedance of filter 10, i.e., guarantee mobile terminal port load impedance always with day
The load impedance of line end mouth matches, and this improves the efficiency of power amplifier and output powers, effectively reduce mobile terminal
Power consumption and calorific value under coupling and state.
Specifically, in one particular embodiment of the present invention, the basic structure of radio circuit can be as shown in figure 3, penetrate
Frequency circuit further includes power amplifier 40, switch module in addition to including filter 10, matching module 20 and standing wave adjuster 30
50, the first matching module 60 between power amplifier 40 and filter 10, the second matching module 70 after switch module 50.
Wherein, the modules in radio circuit (power amplifier 40, filter 10, switch module 50 and microstrip line etc.) are made in production
It during making is designed and measures according to the reference impedance of 50 Ω, the port Impedance of instrument is also all the ginseng according to 50 Ω
It examines impedance to be designed and measure, therefore, when the load of mobile terminal is instrument, i.e., when mobile terminal is in conducted state
When, it is usually easy to match the port Impedance of mobile terminal with the port Impedance of instrument.In multiband system, antenna
60 working frequency range is wider, and under each working frequency range, the reflection coefficient and phase (i.e. time delay) of antenna port differ greatly, at this point,
Even if increasing standing wave adjuster 30 in radio circuit to adjust the standing wave of the load of filter 10, if the reflection system of antenna port
Several reflection coefficients with mobile terminal port are not conjugated, and still the load impedance of antenna port all can not be matched to 50 Ω.?
That is only increasing standing wave adjuster 30, the reflection coefficient of the output end of filter 10 when mobile terminal is in coupling and state
It is not necessarily conjugated with the load reflection coefficient of filter 10, the port Impedance of mobile terminal is still deposited with the port Impedance of antenna 60
The mismatch the problem of.
Further analysis, in above-mentioned radio circuit, the maximum element of time delay is filter 10, the load of filter 10 (from
The output end of filter 10 is seen to 60 end of antenna) phase of reflection coefficient is more convergent, and the load of power amplifier 40
The phase bit comparison of (in terms of from the output end of power amplifier 40 to 60 end of antenna) reflection coefficient dissipates, once the port of mobile terminal
The port Impedance mismatch of impedance and antenna 60, the consistency of the load impedance of power amplifier 40 will severe exacerbation, cause i.e.
Just for same frequency range different channels, also difference is huge greatly for the power consumption of mobile terminal and calorific value.
Specifically, when in radio circuit without standing wave adjuster 30, if filter 10 is to being 50 Ω between antenna port
Matching system, filter 10 to the Insertion Loss between antenna port are L, phase of the filter 10 to the transmission coefficient between antenna port
Position is B.When mobile terminal is in coupling and state, if the reflection coefficient of antenna port is Rt, the load of filter 10 is anti-
It penetrates coefficients R and meets following formula:
R=L-2e-2BRt
The size of phase B not will lead to conduction mismatch it can be seen from above formula, and the size of phase B will not influence
Under couple state, the amplitude and standing wave of the load reflection coefficient R of filter 10, the size of phase B only will affect filter 10
The phase of load reflection coefficient R.
Since the rear class of filter 10 has matching module 20, the adjustable phase B of matching module 20.At mobile terminal
When conducted state, each inter-stage impedance of radio circuit be all it is matched, the time delay of filter 10 does not influence to match.Work as mobile terminal
When in coupling and state, if the load impedance mismatch of the output terminal impedance and filter 10 of filter 10, in the defeated of filter 10
After outlet increases standing wave of the standing wave adjuster 30 to adjust the load of filter 10, even if standing wave adjuster 30 brings additional phase
Position, is adjusted phase B by the matching module 20 of 10 rear class of filter, it can adjusts the load reflection system of filter 10
The phase of number R, so that the load reflection coefficient opposite in phase of the reflection coefficient phase of the output end of filter 10 and filter 10,
I.e. so that the output terminal impedance of filter 10 is matched with the load impedance of filter 10.
Optionally, in one embodiment of the invention, referring to Fig. 3, standing wave adjuster 30 may include: that at least one is opened
Device 31 is closed, the first end of switching device 31 is connected with the input terminal of the output end of filter 10 and matching module 20 respectively；Extremely
A few standing wave adjusts unit 32, and standing wave adjusts unit 32 and is connected with the second end of switching device 31, and standing wave adjusts unit 32 and uses
In the standing wave for the load for adjusting filter 10, each standing wave, which adjusts unit 32, has different working frequency range；Control unit 33, control
Unit 33 is connected with the control terminal of switching device 31, when the load of mobile terminal is instrument, 33 control switch device of control unit
Part 31 disconnects, and when the load of mobile terminal is antenna, control unit 33 is according to the working frequency range of mobile terminal, control and standing wave
Adjust unit 32 (standing wave adjust unit 32 working frequency range and the working frequency range of mobile terminal it is identical) corresponding switching device
31 conductings.Since switching device 31 is far from antenna 60, the general switching device 31 of antistatic effect can choose, convenient for section
Save switch cost.In addition, due to standing wave adjust unit 32 only need to single frequency range adjust filter 10 load standing wave, because
This, Insertion Loss is small.
Optionally, control unit 33 can be set in the control chip of mobile terminal.In the embodiment of the present invention, at least one
A can be one or more.
Optionally, switching device 31 may include mechanical switch, electronic switch, triode or metal-oxide-semiconductor.Specifically, electronics
Switch may include single-pole single-throw switch (SPST), single pole multiple throw, multi-pole, multi-throw switch.
Wherein, the number of switching device 31 can be determined according to the working frequency range number of mobile terminal and the type of switch.
For example, when the working frequency range number of mobile terminal is three, if switching device 31 is that single pole multiple throw or multitool are thrown out more
It closes, then the number of switching device 31 can be 1.At this point, standing wave adjusting unit 32 can be with a throwing point of switching device 31
It is connected, when mobile terminal is in coupling and state, according to the working frequency range of mobile terminal, control and standing wave are adjusted control unit 33
Unit 32 (standing wave adjust unit 32 working frequency range and the working frequency range of mobile terminal it is identical) conducting of corresponding throwing point.
Optionally, it may include at least one of capacitor, inductance or transmission line that standing wave, which adjusts unit 32,.For example, standing wave
Adjusting unit 32 may include multiple capacitors or standing wave adjusting unit 32 may include at least one capacitor and at least one inductance
Deng.
Compared with prior art, standing wave adjusting unit 32 can be only by capacitor, inductance or transmission line in the embodiment of the present invention
It constitutes, not only occupies little space, Insertion Loss is small, and cost is also lower.
In one embodiment of the invention, standing wave adjuster 30 can be integrally disposed with filter 10, to reduce standing wave
30 the space occupied of adjuster.
The radio circuit of the embodiment of the present invention includes following advantages: by increasing standing wave adjuster in radio circuit, and
The output end that filter is arranged is connected with the input terminal of matching module, standing wave adjuster respectively with the output end of filter and matching
The input terminal of module is connected, and when the load of mobile terminal is antenna, i.e., when mobile terminal is in coupling and state, passes through standing wave
Adjuster adjusts the standing wave of the load of filter, and then is matched by output end phase of the matching module to filter, with
Match the output terminal impedance of filter with the holding of the load impedance of filter.In this way, when mobile terminal is in coupling and state,
The embodiment of the present invention can guarantee that the output terminal impedance of filter in mobile terminal is matched with the load impedance of filter always, i.e.,
Guarantee that the load impedance of mobile terminal port is matched with the load impedance of antenna port always, this improves power amplifiers
Efficiency and output power, effectively reduce power consumption and calorific value of the mobile terminal under coupling and state, can reduce simultaneously
Space hold and Insertion Loss, realization reduce cost.
The invention also discloses a kind of mobile terminals, including above-mentioned radio circuit.
Specifically, mobile terminal may include mobile phone, tablet computer, personal digital assistant, vehicle-mounted computer, intelligently wearing is set
Standby or navigator etc..
The mobile terminal of the embodiment of the present invention includes following advantages: by increasing standing wave adjuster in radio circuit, and
The output end that filter is arranged is connected with the input terminal of matching module, standing wave adjuster respectively with the output end of filter and matching
The input terminal of module is connected, and when the load of mobile terminal is antenna, i.e., when mobile terminal is in coupling and state, passes through standing wave
Adjuster adjusts the standing wave of the load of filter, and then is matched by output end phase of the matching module to filter, with
Match the output terminal impedance of filter with the holding of the load impedance of filter.In this way, when mobile terminal is in coupling and state,
The embodiment of the present invention can guarantee that the output terminal impedance of filter in mobile terminal is matched with the load impedance of filter always, i.e.,
Guarantee that the load impedance of mobile terminal port is matched with the load impedance of antenna port always, this improves power amplifiers
Efficiency and output power, effectively reduce power consumption and calorific value of the mobile terminal under coupling and state, can reduce simultaneously
Space hold and Insertion Loss, realization reduce cost.
For mobile terminal embodiment, since it includes radio circuit, so being described relatively simple, related place
Illustrate referring to the part of radio circuit embodiment.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Above to a kind of radio circuit provided by the present invention and a kind of mobile terminal, it is described in detail, herein
Apply that a specific example illustrates the principle and implementation of the invention, the explanation of above example is only intended to help
Understand method and its core concept of the invention；At the same time, for those skilled in the art, according to the thought of the present invention,
There will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as to this
The limitation of invention.
Claims (6)
1. a kind of radio circuit is applied to mobile terminal, which is characterized in that the radio circuit includes filter, matching module
And standing wave adjuster, wherein
The output end of the filter is connected with the input terminal of the matching module, the standing wave adjuster respectively with the filtering
The output end of device is connected with the input terminal of the matching module；
When the load of the mobile terminal is antenna, the standing wave adjuster adjusts the standing wave of the load of the filter, institute
It states matching module to match the output end phase of the filter, so that the output terminal impedance of the filter and the filter
The load impedance of wave device keeps matching；
Wherein, the standing wave adjuster includes:
At least one switching device, the first end of the switching device respectively with the output end of the filter and the matching mould
The input terminal of block is connected；
At least one standing wave adjusts unit, and the standing wave adjusts unit and is connected with the second end of the switching device, the standing wave
Adjust the standing wave that unit is used to adjust the load of the filter；Each standing wave, which adjusts unit, has different working frequency range；
Control unit, described control unit are connected with the control terminal of the switching device, when the load of the mobile terminal is instrument
When device, described control unit controls the switching device and disconnects, and when the load of the mobile terminal is antenna, the control is single
Working frequency range of the member according to the mobile terminal, the control switch device conductive corresponding with standing wave adjusting unit.
2. radio circuit according to claim 1, which is characterized in that the standing wave adjust unit include capacitor, inductance or
At least one of transmission line.
3. radio circuit according to claim 1, which is characterized in that the switching device includes mechanical switch, electronic cutting
Pass, triode or metal-oxide-semiconductor.
4. radio circuit according to claim 1, which is characterized in that the standing wave adjuster is integrated with the filter and set
It sets.
5. a kind of mobile terminal, which is characterized in that including radio circuit of any of claims 1-4.
6. mobile terminal according to claim 5, which is characterized in that the mobile terminal includes mobile phone, tablet computer, a
Personal digital assistant, vehicle-mounted computer, intelligent wearable device or navigator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710297569.2A CN107124192B (en) | 2017-04-28 | 2017-04-28 | A kind of radio circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710297569.2A CN107124192B (en) | 2017-04-28 | 2017-04-28 | A kind of radio circuit and mobile terminal |
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| Publication Number | Publication Date |
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| CN107124192A CN107124192A (en) | 2017-09-01 |
| CN107124192B true CN107124192B (en) | 2019-07-26 |
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ID=59726063
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710297569.2A Active CN107124192B (en) | 2017-04-28 | 2017-04-28 | A kind of radio circuit and mobile terminal |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052975A (en) * | 1991-02-06 | 1991-07-10 | 中国人民解放军空军第一研究所 | A kind of slot antenna for variably polarized waveguide |
| CN101814963A (en) * | 2010-02-25 | 2010-08-25 | 飞创(苏州)电讯产品有限公司 | Automatic microwave electronic adjustable loading device and detection method thereof |
| CN104467692A (en) * | 2014-12-15 | 2015-03-25 | 佳律通信设备(上海)有限公司 | Input-matching standing-wave ratio adjusting circuit for low-noise amplifier |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7409245B1 (en) * | 2007-01-30 | 2008-08-05 | Cardiac Pacemakers, Inc. | Variable antenna matching network for an implantable antenna |
| JP6216951B2 (en) * | 2012-07-12 | 2017-10-25 | 学校法人慶應義塾 | Directional coupled communication device |
-
2017
- 2017-04-28 CN CN201710297569.2A patent/CN107124192B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1052975A (en) * | 1991-02-06 | 1991-07-10 | 中国人民解放军空军第一研究所 | A kind of slot antenna for variably polarized waveguide |
| CN101814963A (en) * | 2010-02-25 | 2010-08-25 | 飞创(苏州)电讯产品有限公司 | Automatic microwave electronic adjustable loading device and detection method thereof |
| CN104467692A (en) * | 2014-12-15 | 2015-03-25 | 佳律通信设备(上海)有限公司 | Input-matching standing-wave ratio adjusting circuit for low-noise amplifier |
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| Publication number | Publication date |
|---|---|
| CN107124192A (en) | 2017-09-01 |
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