CN106487415A - A kind of RF front-end circuit and communication terminal - Google Patents
A kind of RF front-end circuit and communication terminal Download PDFInfo
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- CN106487415A CN106487415A CN201610843357.5A CN201610843357A CN106487415A CN 106487415 A CN106487415 A CN 106487415A CN 201610843357 A CN201610843357 A CN 201610843357A CN 106487415 A CN106487415 A CN 106487415A
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- transmitting
- end circuit
- transceiver
- frequency range
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Abstract
The embodiment of the present invention provides a kind of RF front-end circuit and communication terminal, and this circuit includes RF transceiver, at least two separate up transmitting chains, transmitting-receiving switching circuit and the main collection antenna being sequentially connected electrically;At least two separate up transmitting chains are used for launching the data of different frequency range;The transmitter of RF transceiver includes at least two sets mixing and this vibrating system, and the data for supporting at least two frequency ranges simultaneously is launched, and RF transceiver is provided with the emission port of at least two frequency ranges, and each emission port connects the up transmitting chain of corresponding frequency band.The present invention is by improving to RF transceiver and up transmitting chain, RF transceiver is allow to support data transmitting while multiple frequency range, the up polymerization of interband just can be realized on this basis, solve the problems, such as that existing carrier aggregation radio frequency scheme does not support that interband up-link carrier is polymerized, enhance the experience of user.
Description
Technical field
The present invention relates to the communications field, more particularly, to a kind of RF front-end circuit and communication terminal.
Background technology
In order to meet the ever-increasing data service of user demand it is proposed that carrier aggregation this be used for spread bandwidth
With the technology improving handling capacity.Existing carrier aggregation radio frequency scheme support up-link carrier polymerization in band (intraband ULCA,
Interband uplink carrier aggregation), band in descending carrier polymerization (intraband DLCA,
Interband downlink carrier aggregation) and the polymerization of interband descending carrier (interband DLCA,
Interband downlink carrier aggregation), but do not support interband up-link carrier polymerization (interband
ULCA, interband uplink carrier aggregation).
Content of the invention
The embodiment of the present invention provides a kind of RF front-end circuit and communication terminal, solves existing carrier aggregation radio frequency scheme not
Support the problem of interband up-link carrier polymerization.
For solving above-mentioned technical problem, the embodiment of the present invention employs the following technical solutions:
A kind of RF front-end circuit, including:The RF transceiver that is sequentially connected electrically, at least two separate up
Penetrate link, transmitting-receiving switching circuit and main collection antenna;At least two separate up transmitting chains are used for launching different frequency range
Data;The transmitter of RF transceiver includes at least two sets mixing and this vibrating system, for supporting at least two frequency ranges simultaneously
Data transmitting, RF transceiver is provided with the emission port of at least two frequency ranges, and each emission port connects the upper of corresponding frequency band
Row transmitting chain.
Further, in up transmitting chain at least two up transmitting chains arrange power amplifier, are used for putting
The data of big RF transceiver transmitting.
Further, also include the switch power supply chip being connected with power amplifier, for powering for power amplifier.
Further, switch power supply chip is envelope-tracking chip.
Further, transmitting-receiving switching circuit includes multiplexer and the first switch controller, and multiplexer is used in the first switching
Under the control of controller, switch up transmitting chain, or be also turned at least two up transmitting chains.
Further, multiplexer includes duplexer, is separately positioned in each up transmitting chain, for by upstream data with
Downlink data separates.
Further, the first switch controller includes double-point double-throw switch.
Further, transmitting-receiving switching circuit includes wave filter and the second switch controller, and wave filter is separately positioned on each
In row transmitting chain, for upstream data is separated with downlink data, the working frequency range of each up transmitting chain median filter with
The working frequency range of its affiliated transmitting chain is corresponding.
Further, the second switch controller includes double-point double-throw switch.
A kind of communication terminal, the RF front-end circuit providing including baseband chip, power management chip and the present invention,
Baseband chip is used for controlling the aggregation scheme of RF front-end circuit, and power management chip is used for powering for RF front-end circuit.
RF front-end circuit provided in an embodiment of the present invention and communication terminal, by RF transceiver and up transmitting chain
Road improves so that RF transceiver can support data transmitting while multiple frequency range, just can realize on this basis
The up polymerization of interband, solves the problems, such as that existing carrier aggregation radio frequency scheme does not support that interband up-link carrier is polymerized, enhances use
The experience at family.
Brief description
The schematic diagram of the RF front-end circuit that Fig. 1 provides for the embodiment of the present invention one;
The schematic diagram of the communication terminal that Fig. 2 provides for the embodiment of the present invention two;
The schematic diagram of the existing RF front-end circuit that Fig. 3 is related to for the embodiment of the present invention three
First schematic diagram of the RF front-end circuit that Fig. 4 is related to for the embodiment of the present invention three;
Second schematic diagram of the RF front-end circuit that Fig. 5 is related to for the embodiment of the present invention three;
3rd schematic diagram of the RF front-end circuit that Fig. 6 is related to for the embodiment of the present invention three;
4th schematic diagram of the RF front-end circuit that Fig. 7 is related to for the embodiment of the present invention three.
Specific embodiment
The present invention is applied to all terminals, including PC, mobile phone, PAD etc..Combine accompanying drawing pair below by specific embodiment
The present invention is described in further detail.
Embodiment one:
The schematic diagram of the RF front-end circuit that Fig. 1 provides for the embodiment of the present invention one, refer to Fig. 1, and the present embodiment provides
RF front-end circuit include:The separate up transmitting chain 12 of the RF transceiver 11, at least two that is sequentially connected electrically
(121 in Fig. 1 and 122), transmitting-receiving switching circuit 13 and main collection antenna 14;At least two separate up transmitting chains 12
(121 in Fig. 1 and 122) are used for launching the data of different frequency range;The transmitter of RF transceiver 11 includes at least two sets mixing
And this vibrating system, the data for supporting at least two frequency ranges simultaneously launches, and RF transceiver 11 is provided with least two frequency ranges
Emission port TX (TX1 and TX2 in Fig. 1), each emission port connects the up transmitting chain 12 of corresponding frequency band.
In actual applications, as a example with FDD (Frequency Division Duplexing, FDD) frequency range, in
The frequency range that UNICOM of state is used is frequency range 1 (1920-1980MHZ) and frequency range 3 (1710-1785MHZ), prior art band support
Interband descending carrier between 1 with frequency range 3 is polymerized, but the interband up-link carrier being unable between band support 1 and frequency range 3 gathers
Close.In embodiment shown in the application Fig. 1, at least two sets mixing that RF transceiver 11 is arranged by its transmitter section and
This vibrating system, it is possible to achieve band support 1 and the data of frequency range 3 are launched simultaneously, by separate up transmitting chain 121
(data of transmission band 1) and up transmitting chain 122 (data of transmission band 3), after process, by receiving and dispatching switching circuit 13
And main collection antenna 14 to emission, it is possible to achieve the interband up-link carrier between frequency range 1 and frequency range 3 is polymerized.
In one embodiment, in the up transmitting chain of above-described embodiment at least two up transmitting chain settings are active
Rate amplifier, for amplifying the data of RF transceiver transmitting.In actual applications, RF transceiver 11 can be supported to appoint simultaneously
The data transmitting of multiple frequency ranges of anticipating, then corresponding, just has any number of separate up transmitting chains 12, these are many
Individual separate up transmitting chain 12 all power amplifier can be set it is also possible to only partly commonly use up transmitting chain
Power amplifier is arranged on road 12.
In one embodiment, above-described embodiment also includes the switch power supply chip being connected with power amplifier, for for work(
Rate amplifier is powered.In actual applications, power amplifier could work after needing power supply, according to conventional power supply technique,
Power amplifier will always be in opening, leads to unnecessary power consumption, and the present embodiment provides switch power supply chip, using this
Switch power supply chip can be that power amplifier is powered when needing to launch data, and the power-off when not needing to launch data reduces
Power consumption.
In one embodiment, the switch power supply chip of above-described embodiment is envelope-tracking chip.The present embodiment provides envelope
Follow the tracks of chip as switch power supply chip, in power supply, launch the size variation situation of data as needed, change power supply in real time
Electric current, further reduces power consumption.
For FDD frequency range, in one embodiment, the transmitting-receiving switching circuit of above-described embodiment includes multiplexer and the first switching
Controller, multiplexer is used under the control of the first switch controller, switches up transmitting chain, or is also turned at least two
Individual up transmitting chain.Preferably, multiplexer includes duplexer, is separately positioned in each up transmitting chain, for will be up
Data is separated with downlink data, and the first switch controller includes double-point double-throw switch.Using DPDT (Double Pole Double
Throw, DPDT) switch to realize the polymerization of interband two frequency range with two duplexer Duplexer, compared to four traditional works
Device scheme Insertion Loss is little, transmitting receptivity is more excellent, easy to control, cost is more excellent, can improve the isolation between polymerized frequency band simultaneously
Degree, the less performance interfering, improving whole machine.
For TDD (Time Division Duplex, time division duplex) frequency range, in one embodiment, above-described embodiment
Transmitting-receiving switching circuit includes wave filter and the second switch controller, and wave filter is separately positioned in each up transmitting chain, is used for
Upstream data is separated with downlink data, the working frequency range of each up transmitting chain median filter and the work of its affiliated transmitting chain
Make frequency range corresponding.Preferably, the second switch controller includes double-point double-throw switch.For example, with the frequency range 33 of TDD frequency range
(1900-1920MHZ), and as a example frequency range 38 (2570-2620MHZ), up transmitting chain 121 launches the data of frequency range 33, then
Its internal wave filter needs for its working frequency range to be set to 1900-1920MHZ it is allowed to the data of 1900-1920MHZ frequency range is received
Send out, up transmitting chain 122 launches the data of frequency range 38, then its internal wave filter needs to be set to its working frequency range
2570-2620MHZ is it is allowed to the data transmit-receive of 2570-2620MHZ frequency range.
Embodiment two:
The schematic diagram of the communication terminal that Fig. 2 provides for the embodiment of the present invention two, as shown in Fig. 2 the present embodiment offer is logical
Letter terminal includes the RF front-end circuit 23 that baseband chip 21, power management chip 22 and the present invention provide, baseband chip 21
For controlling the aggregation scheme of RF front-end circuit 23, power management chip 22 is used for powering for RF front-end circuit 23.
In actual applications, (carrier aggregation, carrier wave gathers the various CA of baseband chip supported protocol regulation
Close) pattern and frequency range combination, control RF front-end circuit 23 CA model selection.Power management chip 22 is RF front-end circuit
23 each active devices provide power supply, and it is also that ET (Envelope Trancking envelope-tracking) chip provides power supply, ET chip
Then power for PA (Power Amplifier, power amplifier) as Switching Power Supply.Also include memorizer, as agreement and penetrating
Frequency and the deposit position of other program, coordinate the scheduling of each hardware resource, also include user interface, receiving data etc..
Embodiment three:
In conjunction with concrete application scene, the present invention is done with further annotation explanation.
Existing carrier aggregation radio frequency scheme supports descending load in up-link carrier polymerization (intraband ULCA) in band, band
Ripple polymerization (intraband DLCA) and interband descending carrier polymerization (interband DLCA).Uplink and downlink carrier aggregation in band
Radio frequency path and non-carrier be polymerized identical, its realization is mainly realized by agreement and software.Interband carrier aggregation is then
The radio frequency link of two different frequency ranges of needs works simultaneously and just enables, and therefore its radio frequency scheme is different from non-carrier polymerization,
Existing technology has realized the polymerization of interband descending carrier, but without the radio frequency scheme of interband up-link carrier polymerization.
Taking two carrier aggregation as a example, existing treat a descending carrier aggregation scheme as shown in figure 3, main collection receive two carrier waves
Polymerization is realized two frequency ranges by four work devices and is worked thus realizing interband DLCA simultaneously;Two carrier aggregation of diversity reception
Ensure that two frequency ranges work thus realizing interband DLCA simultaneously by double frequency device.Wherein RF transceiver Transceiver
Master, diversity receiver partly respectively comprise two groups for the frequency mixers of down coversion and local oscillator, and due to aspects such as power consumption, costs
Limit, in the carrier aggregation radio frequency scheme of prior art, transmitter can only have a frequency range transmitting, can only support that a frequency range is sent out
Penetrate, no support the radio-frequency front-end scheme of interband up-link carrier polymerization.Meanwhile, existing FDD frequency range interband descending carrier is polymerized institute
Larger with four work device Quadplexer Insertion Loss, TX, RX interport isolation is poor, power consumption is big, heating is serious, reception to lead to whole machine to be launched
Interfere between poor sensitivity, frequency range, poor user experience, and this device price is high, the cost of mobile terminal is also improved.
The present embodiment provides one kind can support that interband up-link carrier polymerization (interband ULCA) and interband are descending simultaneously
The RF front-end circuit scheme of carrier aggregation (interband DLCA), to improve uplink and downlink message transmission rate, lifts user
Experience.
As shown in figure 4, the carrier aggregation circuit of the present invention can be divided into up-link carrier aggregated links and descending load according to link
Ripple aggregated links (comprises main collection to receive and diversity reception).
Wherein, interband ULCA link pass through RF transceiver, radio-frequency power amplifier 1 and 2, duplexer 1 and 2,
The electrical connection of radio frequency double-point double-throw switch, radio-frequency (RF) switch 1 and first antenna completes up carrier aggregation, and envelope-tracking supplies
Electrical chip 1 and 2 is respectively radio-frequency power amplifier 1 and 2 power supply.
The wherein main collection receives link of interband DLCA is opened by first antenna, radio-frequency (RF) switch 1, radio frequency DPDT
Close, duplexer 1 and 2 arrives RF transceiver again and realizes descending main collection carrier aggregation;Diversity link is then opened by the second antenna, radio frequency
Close the carrier aggregation that 2, double frequency filter to RF transceiver realizes descending diversity.
Wherein, the transmitter section of RF transceiver comprises at least two sets mixing and this vibrating system, and can support two simultaneously
Frequency range or multiband are launched simultaneously;Main diversity receiver part comprises at least two sets mixing and this vibrating system and can support two simultaneously
Frequency range or multiband receive simultaneously.
Wherein, DPDT SW is MIPI control chip, can achieve that two knives are closed at or any of which knife closure.
Wherein, ET IC is envelope-tracking power supply chip, and it is to be controlled by modem IC, and its output current wave is following the tracks of
The working signal waveform of PA, to reach the effect improving power supplying efficiency and power saving.
Wherein, in ULCA and main collection DLCA link, when being operated under interband pattern, the double-pole of DPDT SW all closes
Close, two carrier wave frequency ranges, be also turned on.When being operated under single carrier intraband pattern or non-carrier aggregation scheme, DPDT
A certain knife closure in SW, for connecting the radio frequency link of wanted working frequency range.
Wherein, diversity DLCA link makes two carrier waves receive by Diplexer simultaneously or single carrier carrier wave receives, thus real
Existing interband DLCA and intraband DLCA.
Specifically, the present embodiment supports interband ULCA, interband DLCA, intraband while offer
The radio-frequency front-end scheme of ULCA and intraband DLCA, is applied to the mobile communication terminals such as mobile phone, flat board, module, can increase
Network transmission bandwidth, improves uplink and downlink message transmission rate.
As shown in figure 4, carrier aggregation radio circuit scheme includes Tranceiver 10, frequency range 1 radio-frequency (RF) power amplification and supplies battery core
Piece network 20 (PA1, ET IC1) and frequency range 2 radio-frequency (RF) power amplification and power supply chip 30 (PA2, ET IC2), frequency range 1duplexer1
40th, frequency range 2,dup,lex,er2 50, DPDT SW 60, first switching switch SW1 70, main collection antenna ANT1 80.Wherein 10,20,
30th, 40,50,60,70,80 may make up interband ULCA and intraband ULCA radio frequency link;80、70、60、50、40、
10 may make up interband DLCA and the intraband DLCA radio frequency link that main collection receives.Carrier aggregation radio circuit also wraps
Include the second antenna ANT2 90, second and switch antenna 100, diplexer110, they constitute diversity together with Tranceiver 10
The interband DLCA receiving and intraband DLCA radio frequency link.
Especially, the radio frequency link in the present embodiment, transmitting that Transceiver, PA, SW are supported, receiving port end
Mouth number all can extend, to support more frequency ranges or multi-carrier polymerizing.
Transceiver 10 comprises frequency range 1 emission port TX1, frequency range 2 emission port TX2, the main receiving port of frequency range 1
PRX1, the main receiving port PRX2 of frequency range 2,1 point of receiving port DRX1 of frequency range, 2 points of receiving port DRX2 of frequency range.
The input electrical connection of the frequency range 1 emission port TX1 and PA1 of Transceiver 10, frequency range 2 emission port TX2
Input electrical connection with PA2;The electrical connection of TX end, the output of PA2 and the duplexer 2 of the output of PA1 and duplexer 1
TX end electrical connection;The ANT end of duplexer 1 and DPDT SW electrical connection, the ANT end of duplexer 2 and DPDT SW
Electrical connection;DPDPT SW and SW1 is electrically connected;SW1 is electrically connected with first antenna ANT1;When DPDT SW is also turned on
During duplexer1 and duplexer2, you can realize interband ULCA;When only turning on duplexer1 or duplexer2,
Terminal can be operated under intraband ULCA or non-ULCA pattern.
Meanwhile, the RX end of duplexer 1 and the main receiving port PRX1 of Tranceiver are electrically connected, duplexer 2
RX end and Tranceiver main receiving port PRX2 electrical connection;Pass through the company of ANT1 and SW1, SW1 and DPDT SW again
Connect, can achieve the descending carrier polymerization that main collection receives.And when DPDTSW is also turned on duplexer1 and duplexer2, you can
Realize interband DLCA, when only turning on duplexer1 or duplexer2, terminal can be operated in intraband DLCA
Or under non-DLCA pattern.
Second antenna ANT2 and second switching switch SW2 electrical connection, SW2 is electrically connected with diplexer common port;
The frequency dividing port of two frequency ranges of diplexer is electrically connected with diversity reception port DRX1 and DRX2 of Tranceiver respectively.
Interband DLCA and intrabandDLCA of achievable diversity reception.
Up-link in carrier aggregation radio circuit shown in Fig. 4 is primarily directed to the carrier aggregation of FDD frequency range, and
The wave filter that the carrier aggregation of TDD frequency range only need to change duplexer duplexer1 and duplexer2 into corresponding band can achieve
Interband ULCA, as shown in figure 5, the descending carrier aggregated links that the main collection of TDD frequency range receives is identical with diversity reception link,
Also can be realized with diplexer.
As shown in fig. 6, in actual applications, four work devices can be continuing with and realize frequency range 1duplexer140, frequency range
2duplexer2 50, the function of DPDT SW 60, repeat no more.
As shown in fig. 7, in actual applications, can be by increasing mixing and this vibrating system, up transmitting in transmitter
The quantity of link, supports any number of 4 even the interband up-link carrier set of multiband.
By the enforcement of above example, the method that the present invention provides possesses following beneficial effect:
The present invention by RF transceiver and up transmitting chain are improved so that RF transceiver can support many
While individual frequency range, data transmitting, just can realize the up polymerization of interband on this basis, solve existing carrier aggregation radio frequency
Scheme does not support the problem of interband up-link carrier polymerization, enhances the experience of user.
Further, radio-frequency carrier polymerization circuit supports interband uplink and downlink carrier aggregation, is remarkably improved Consumer's Experience.
Further, interband uplink and downlink carrier aggregation circuit using DPDT and two Duplexer to realize two frequency ranges gather
Close, transmitting receptivity little compared to traditional four work device scheme Insertion Loss is more excellent, easy to control, cost is more excellent.
Further, interband uplink and downlink carrier aggregation circuit using DPDT and two Duplexer to realize two frequency ranges gather
Close, the isolation between polymerized frequency band, the less performance interfering, improving whole machine can be improved.
Further, in interband up-link carrier polymerization circuit, PA power supply is powered using ET Switching Power Supply, can effectively lower PA
Power consumption, substantially reduce carrier aggregation increase extra power consumption.
Further, this carrier radio frequency scheme is easy to extend, and only need to increase duplexer and multithrow switch achieves that 3 carrier waves
Or multi-carrier polymerizing.
Meanwhile, the file memory method that the present invention provides, is applied when preserving file with existing, reminds user setup storage
The mode in path is compared it is not necessary to user repeats to arrange, and once configures, for a long time effectively.
Above content is to further describe it is impossible to assert this with reference to specific embodiment is made for the present invention
Bright it is embodied as being confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made, all should be considered as belonging to the protection of the present invention
Scope.
Claims (10)
1. a kind of RF front-end circuit is it is characterised in that include:The RF transceiver being sequentially connected electrically, at least two mutually only
Vertical up transmitting chain, transmitting-receiving switching circuit and main collection antenna;Described at least two separate up transmitting chains are used
Data in transmitting different frequency range;The transmitter of described RF transceiver includes at least two sets mixing and this vibrating system, for same
When support that the data of at least two frequency ranges is launched, described RF transceiver is provided with the emission port of at least two frequency ranges, each
Penetrate the up transmitting chain that port connects corresponding frequency band.
2. RF front-end circuit as claimed in claim 1 it is characterised in that in described up transmitting chain at least two on
Row transmitting chain arranges power amplifier, for amplifying the data of described RF transceiver transmitting.
3. RF front-end circuit as claimed in claim 2 is it is characterised in that also include and opening that described power amplifier is connected
Close power supply chip, for powering for described power amplifier.
4. RF front-end circuit as claimed in claim 3 is it is characterised in that described switch power supply chip is envelope-tracking core
Piece.
5. the RF front-end circuit as described in any one of Claims 1-4 is it is characterised in that described transmitting-receiving switching circuit includes
Multiplexer and the first switch controller, described multiplexer is used under the control of described first switch controller, switches up
Penetrate link, or be also turned at least two up transmitting chains.
6. RF front-end circuit as claimed in claim 5, it is characterised in that described multiplexer includes duplexer, is respectively provided with
In each up transmitting chain, for upstream data is separated with downlink data.
7. RF front-end circuit as claimed in claim 6 is it is characterised in that described first switch controller includes DPDT
Switch.
8. the RF front-end circuit as described in any one of Claims 1-4 is it is characterised in that described transmitting-receiving switching circuit includes
Wave filter and the second switch controller, described wave filter is separately positioned in each up transmitting chain, for by upstream data with
Downlink data separates, and the working frequency range of each up transmitting chain median filter is corresponding with the working frequency range of its affiliated transmitting chain.
9. RF front-end circuit as claimed in claim 8 is it is characterised in that described second switch controller includes DPDT
Switch.
10. a kind of communication terminal is it is characterised in that include baseband chip, power management chip and as claim 1 to 9 times
RF front-end circuit described in one, described baseband chip is used for controlling the aggregation scheme of described RF front-end circuit, described electricity
Source control chip is used for powering for described RF front-end circuit.
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