CN207099067U - Signal receiving/transmission device and mobile terminal - Google Patents
Signal receiving/transmission device and mobile terminal Download PDFInfo
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- CN207099067U CN207099067U CN201720591653.0U CN201720591653U CN207099067U CN 207099067 U CN207099067 U CN 207099067U CN 201720591653 U CN201720591653 U CN 201720591653U CN 207099067 U CN207099067 U CN 207099067U
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Abstract
A kind of signal receiving/transmission device and a kind of mobile terminal, signal receiving/transmission device include：Power amplifier module；SAW filter is received and dispatched, power amplifier module is more than or equal to a threshold value with receiving and dispatching the distance between SAW filter；Matching network, matching network connection power amplifier module and transmitting-receiving SAW filter, matching network include：π types matching unit and the L-type matching unit being connected with π type matching units.Signal receiving/transmission device and mobile terminal are not improving mainboard space-consuming, and in the case of low cost, solve the problems, such as WIFI signal interference.
Description
Technical field
It the utility model is related to mobile technology field, more particularly to a kind of signal receiving/transmission device and a kind of mobile terminal.
Background technology
With the development of science and technology, digital product is incorporated among daily life extensively, such as smart mobile phone peace
The communication tools such as plate computer provide a great convenience for life, the work of people, enrich the life of people.Smart mobile phone mesh
Before obtain more and more extensive use, smart mobile phone not merely as a kind of communication tool, and more and more by with
In online, playing audio-video etc., this just proposes higher requirement to the communication function of smart mobile phone.In many occasions, user
Need while being conversed using mobile phone, carry out the function such as surf the Net using mobile phone, it is therefore desirable to which mobile phone can be realized simultaneously
The reception of signal and emission function.
At present, intelligent mobile terminal more and more uses duplexer filter, to realize the reception and transmission of signal simultaneously
Function, meet the use demand of user.It is a kind of conventional duplexer filter to receive and dispatch SAW filter (TRX SAW), can
The wave filter that signal is received and sent is realized simultaneously.
Because present smart mobile phone usually requires to support the communications band of WIFI and mobile network simultaneously, and mobile network
It is overlapping with WIFI frequency ranges that band segment is had in communications band, causes signal interference, such as LET TDD B38, B40 and B41 frequency
Section.In order to solve the above problems, when prior art states frequency range in design, generally there are two kinds of implementations：
One kind is realized by bypassing the form of the additional transmitting-receiving SAW filter (TRX SAW) of transmitting path.It refer to
Fig. 1, the WIFI module 101 are connected to bypass transmitting path 102 and transmitting-receiving SAW filter 103, when closing WIFI module
When, directly by bypassing transmitting path transmission signal, by receiving and dispatching SAW filter reception signal；It is other when opening WIFI
Road transmitting path is by receiving and dispatching SAW filter output signal, because WIFI power outputs are higher, in order to avoid transmitting-receiving sound table
Face wave filter is impaired, it is necessary to reduce WIFI power output, influences signal transmission effect.Also, increase bypass transmitting path meeting
Motherboard space is taken, causes the problems such as bad of radiating.
Another kind, it is to use transmitting-receiving SAW filter made of the manufacturing process using bulk accoustic wave filter (BWA)
(TRX SAW).Performance using SAW filter (TRX SAW) made of bulk accoustic wave filter (BWA) manufacturing process is higher,
No matter open or close WIFI can carry out receiving and transmitting signal by receiving and dispatching SAW filter, and need not reduce WIFI output
Power, and it is smaller to take motherboard space.But filtered using sound generating surface is received made of bulk accoustic wave filter (BWA) manufacturing process
The cost of ripple device is higher, and yield is relatively low, supply of material deficiency.
How to use and do not improving mainboard space-consuming, and in the case of low cost, solve the problems, such as WIFI signal interference,
It is current urgent problem to be solved.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of signal receiving/transmission device and a kind of mobile terminal, leads to
Too low cost way reduces the interference of WIFI signal.
In order to solve the above problems, the utility model provides a kind of signal receiving/transmission device, including:Power amplifier module；
SAW filter is received and dispatched, the power amplifier module is more than or equal to a threshold with receiving and dispatching the distance between SAW filter
Value；Matching network, the matching network connect the power amplifier module and the transmitting-receiving SAW filter, the pair net
Network includes：π types matching unit and the L-type matching unit being connected with π type matching units.
Optionally, in addition to circuit board, the power amplifier module and transmitting-receiving SAW filter are respectively arranged at circuit
The relative two sides of plate.
Optionally, the air line distance between the power amplifier module and transmitting-receiving SAW filter is more than or equal to
0.5cm。
Optionally, the L-type matching unit is connected to the transmitting-receiving SAW filter and the π types matching unit.
Optionally, the L-type matching unit is connected to the π types matching unit and the power amplifier module.
Optionally, the transmitting-receiving SAW filter is any one in 38 frequency ranges, 40 frequency ranges and 41 frequency ranges for being operated in
Kind frequency range.
To solve the above problems, the technical solution of the utility model also provides a kind of mobile terminal, the mobile terminal bag
An at least signal receiving/transmission device is included, the signal receiving/transmission device includes：Power amplifier module；SAW filter is received and dispatched, it is described
Power amplifier module is more than or equal to a threshold value with receiving and dispatching the distance between SAW filter；Matching network, the pair net
Network, which connects the power amplifier module and the transmitting-receiving SAW filter, the matching network, to be included：π types matching unit and with
The L-type matching unit of π types matching unit connection.
Optionally, the signal receiving/transmission device also includes circuit board, the power amplifier module and transmitting-receiving sound surface filtering
Device is respectively arranged at the relative two sides of the circuit board.
Optionally, the air line distance between the power amplifier module and transmitting-receiving SAW filter is more than or equal to
0.5cm。
Optionally, the L-type matching unit is connected to the transmitting-receiving SAW filter and the π types matching unit.
Optionally, the L-type matching unit is connected to the π types matching unit and the power amplifier module.
Optionally, the transmitting-receiving SAW filter is any one in 38 frequency ranges, 40 frequency ranges and 41 frequency ranges for being operated in
Kind frequency range.
Signal receiving/transmission device and mobile terminal of the present utility model, in power amplifier module and transmitting-receiving SAW filter
Between be connected with matching network, the matching network includes a π types matching unit and a L-type matching unit, is realizing that power puts
Between big module and transmitting-receiving SAW filter while impedance matching, power amplifier module output can also be further reduced
Signal reaches the power of transmitting-receiving SAW filter, protection transmitting-receiving SAW filter；And it can improve and receive sound generating surface filter
The Out-of-band rejection ability and transmission power of ripple device.Also, it is described transmitting-receiving SAW filter and power amplifier module between away from
From more than or equal to a threshold value, avoid because poor heat radiation impacts to the performance for receiving and dispatching SAW filter.Above-mentioned signal
R-T unit has higher protective effect to transmitting-receiving SAW filter, therefore it is logical to be further added by extra bypass transmitting
Realize the transmitting of WIFI signal in road, it is not required that reduce the power of WIFI signal, so as to save goods of furniture for display rather than for use area, make master
Plate minimizes；And it is possible to using common transmitting-receiving SAW filter, cost is relatively low, market ample supply of goods, and equally can
Realize higher performance.
Brief description of the drawings
Fig. 1 is the structural representation of the sender unit of the prior art of the utility model one；
Fig. 2 is the structural representation of the signal receiving/transmission device of the embodiment of the utility model one；
Fig. 3 is the electrical block diagram of the signal receiving/transmission device of the embodiment of the utility model one；
Fig. 4 is the structural representation of the mobile terminal of the embodiment of the utility model one.
Embodiment
Below in conjunction with the accompanying drawings to the signal receiving/transmission device provided by the utility model using SAW filter and movement eventually
The embodiment at end elaborates.
Fig. 2 is refer to, is the knot of the signal receiving/transmission device of the SAW filter of the embodiment of the utility model one
Structure schematic diagram.
Signal receiving/transmission device includes：Receive and dispatch SAW filter 210, power amplifier module 220 and matching network 230.
The input transducer of SAW filter 210 is received and dispatched, electric signal is become into acoustical signal, acoustical signal passes along plane of crystal
Broadcast, the sound wave dividend sound-absorbing material in one of direction absorbs, and the sound wave of other direction is then sent to output transducer, turned
Electric signal output is changed to, is achieved in frequency-selecting.
Power amplifier module 220, for providing antenna electric feed signal, electric feed signal is by transmitting-receiving SAW filter 210
Sent after filtering to antenna, be changed into wireless signal and be transmitted.The moment power output of power amplifier module 220 is higher, and
Common transmitting-receiving SAW filter 210 bear power bracket and the power output of power amplifier module 220 approaches, if not
Transmitting-receiving SAW filter 210 is protected, the power output of power amplifier module 220, which may exceed, receives sound generating surface filter
The ability to bear of ripple device 210, transmitting-receiving SAW filter 210 is caused to cause to damage.
Matching network 230 is connected to the output end of power amplifier module 220, receives and dispatches the input of SAW filter 210.
Matching network 230 is used to realize power amplifier module 220 and receives and dispatches the impedance matching between SAW filter 210.Also,
Distribution network 230 can reduce the output of power amplifier module 220 to the instantaneous power for receiving and dispatching SAW filter 210, to transmitting-receiving sound
Surface wave filter 210 is protected；And the efficiency of transmission of signal can be improved, and the signal power in communication bandwidth,
And then the Out-of-band rejection ability and transmission power of transmitting-receiving SAW filter 210 are improved, and then improve the letter of signal receiving/transmission device
Number transmitting-receiving efficiency.
Matching network 230 includes：π types matching unit 231 and L-type matching unit 232, π types matching unit 231 and L-type
Connected with unit 232.In this specific embodiment, L-type matching unit 232 connects power amplifier module 220 and the matching of π types is single
Member 231, between π types matching unit 231 and power amplifier module 220.
In other embodiments of the present utility model, L-type matching unit 232, which can also connect, receives sound generating surface filter
Ripple device 210 and π types matching unit 231, between π types matching unit 231 and transmitting-receiving SAW filter 210.Now, L-type
Matching unit 232 with transmitting-receiving SAW filter 210 distance closer to, to transmitting-receiving SAW filter 210 can play more preferably
Protective effect.
The output signal of power amplifier module 220 reaches transmitting-receiving SAW filter 210, matching by matching network 230
The signal that π types matching unit 231 and L-type matching unit 232 input to power amplifier module 220 in network 230 after filtering and
Power suppresses so that by the power output of matching network 230 in the tolerance range of transmitting-receiving SAW filter 210.
By the adjustment to π types matching unit 231 and the design parameter of L-type matching unit 232, power amplification can be reduced
The signal that module 220 exports reaches the power of transmitting-receiving SAW filter 210, protection transmitting-receiving SAW filter 210；And can
To improve the efficiency of transmission of signal, and the signal power in communication bandwidth, and then improve transmitting-receiving SAW filter 210
Out-of-band rejection ability, improve the transmission power of transmitting-receiving SAW filter 210.
Particularly, it is any one in 38 frequency ranges, 40 frequency ranges and 41 frequency ranges for being operated in receive and dispatch SAW filter 210
Kind frequency range, the frequency range of 38 frequency ranges are：2570MHz~2620MHz, the frequency range of 40 frequency ranges are：2300MHz~
2400MHz, the frequency range of 41 frequency ranges are：2496MHz~2696MHz, and WIFI frequency range be 2400MHz~
2500MHz, therefore, the signal of above-mentioned 38 frequency range, 40 frequency ranges and 41 frequency ranges produce interference after easily being received with WIFI frequency ranges.
When opening WIFI function, in signal receiving/transmission device of the present utility model, WIFI signal can also directly pass through receipts
Sound generating surface wave filter 210 is launched and received, and matching network 230 can be protected to transmitting-receiving SAW filter 210,
WIFI transmission power need not be reduced, so as to not interfere with WIFI communication effect.Using common transmitting-receiving SAW filter
, also can normal work in the case of 210.Also, the electronic component that the signal receiving/transmission device uses is less, it is not necessary to extra increase
Radiating circuit is bypassed, is advantageous to reduce the area occupied of circuit board, so as to use smaller circuit board, further improves device collection
Cheng Du.
, can hydraulic performance decline because common transmitting-receiving SAW filter 210 is in the case where radiating is bad.And due to power
Amplification module 210 and transmitting-receiving SAW filter 220 in the course of the work, can all produce more heat, if power amplification
Distance is too near between module 210 and transmitting-receiving SAW filter 220, and temperature can be caused too high, to receiving and dispatching SAW filter 220
Performance affect greatly.Because the modules and device of signal generation apparatus are arranged on circuit board, in order to avoid upper
Problem is stated, on circuit boards, control power amplifier module 220 is with transmitting-receiving SAW filter 210 apart from more than or equal to a threshold
Value.
In an embodiment of the present utility model, power amplifier module 210 and transmitting-receiving SAW filter 220
Position is arranged at the same surface of circuit board, and the air line distance between power amplifier module 210 and transmitting-receiving SAW filter 220
More than or equal to 0.5cm, improve power amplifier module 210 and receive and dispatch the radiating effect of SAW filter 220, avoid receiving and dispatching
The temperature rise of SAW filter 220 is excessive.Also, in order to improve the integrated level of device on circuit board, ensuring radiating effect
Under the premise of, according to the placement regulation of actual circuit element, make power amplifier module 210 and transmitting-receiving SAW filter 220 as far as possible
The distance between reduce.
In another embodiment of the present utility model, power amplifier module 210 and transmitting-receiving SAW filter 220
The two sides of circuit board can be located at respectively, so that it is guaranteed that having between power amplifier module 210 and transmitting-receiving SAW filter 220
Enough distances, it is possible to increase the radiating efficiency of power amplifier module 210 and transmitting-receiving SAW filter 220, avoid temperature rise pair
The performance of transmitting-receiving SAW filter 220 impacts.
Signal receiving/transmission device of the present utility model, it is connected between power amplifier module and transmitting-receiving SAW filter
Distribution network, matching network include a π types matching unit and a L-type matching unit, matching network realize power amplifier module and
Between transmitting-receiving SAW filter while impedance matching, the signal that can also further reduce power amplifier module output reaches
Receive and dispatch the power of SAW filter, protection transmitting-receiving SAW filter；And the band of transmitting-receiving SAW filter can be improved
Outer rejection ability and transmission power.
Further, transmitting-receiving the distance between SAW filter and power amplifier module is more than or equal to a threshold value, avoids
Because poor heat radiation impacts to the performance for receiving and dispatching SAW filter.Above-mentioned signal receiving/transmission device is to transmitting-receiving sound surface filtering
Utensil has higher protective effect, therefore need not be further added by extra bypass transmitting path to realize the transmitting of WIFI signal,
Also without the power for reducing WIFI signal, so as to save goods of furniture for display rather than for use area, minimize mainboard；And it is possible to using general
Logical transmitting-receiving SAW filter, cost is relatively low, market ample supply of goods, and can equally realize higher performance.
Fig. 3 is refer to, is the electrical block diagram of the signal receiving/transmission device of the embodiment of the utility model one.
Signal receiving/transmission device includes：Receive and dispatch SAW filter 300, power amplifier module 310 and matching network, pair net
Network includes π types matching unit 330 and L-type matching unit 320.
L-type matching unit 320 includes the first matching element 321 and the second matching element 322, the first matching element 321
One end is connected to π types matching unit 330, and the other end is connected to power amplifier module 310 or transmitting-receiving SAW filter 300；The
The one end of two matching element 322 is connected to the first matching element 321, and the other end is connected to isopotential point；First matching element 321 is
Any one element in resistance, inductance or electric capacity；Second matching element 322 is any one in resistance, inductance or electric capacity
Element.
In the embodiment, L-type matching unit 320 is located between π types matching unit 330 and power amplifier module 310, is located at
Close to the side of power amplifier module 310, the first matching element 321 is resistance, and one end is connected to π types matching unit 330, the other end
It is connected to power amplifier module 310；Second matching element 242 is inductance, and one end of the second matching element 242 is connected to first
Connection end with distance 321 with power amplifier module 310, other end ground connection.
In other embodiment of the present utility model, L-type match circuit 320 may be located on receiving and dispatching SAW filter
Between 300 and π types matching unit 330, closer to transmitting-receiving SAW filter 300；First matching element 321 is resistance, one end
π types matching unit 330 is connected to, the other end is connected to transmitting-receiving SAW filter 300.In other embodiments, the first matching
Element 321 can also be inductance or electric capacity, and the second matching element 322 can also be electric capacity or resistance.First matching element 321 with
Second matching element 322 can use the element of same type, can also use different types of element.
π types matching unit 330 includes the 3rd matching element 333, the 4th matching element 334 and the 5th matching element 335, the
The one end of three matching element 333 is connected to L-type matching unit 320, and the other end is connected to power amplifier module 310 or receives sound generating surface
Wave filter 300, one end of the 4th matching element 334 and one end of the 5th matching element 335 are respectively connecting to the 3rd matching element
333 both ends, and the other end of the 4th matching element 334 and the other end of the 5th matching element 335 are connected to isopotential point.
In the embodiment, the 3rd matching element 333 is resistance, and the 4th matching element 334 is inductance, the 5th matching element
335 be inductance, and the 4th matching element 334 and the 5th matching element 335 are grounded；In other embodiments, the 3rd matching element 333
Can also be inductance or electric capacity, the 4th matching element 334 can also be resistance or electric capacity, and the 5th matching element 335 can also be
Resistance or electric capacity.3rd matching element 333, the 4th matching element 334 and the 5th matching element 345 can use same type
Element, different types of element can also be used
In the embodiment, signal receiving/transmission device also includes an antenna end 350, for connecting antenna.Transmitting-receiving sound surface filtering
A π types matching unit 340 is also associated between the output end OUT and antenna end 350 of device 300, π types matching unit 340 is used for real
Impedance matching between existing antenna and transmitting-receiving SAW filter 300, π types matching unit 340 include matching element 341, matching
Element 342 and matching element 343, in the embodiment, matching element 341 uses resistance, and matching element 342 uses inductance, matching
Element 343 uses inductance.In other embodiment of the present utility model, matching element 341 can also be used in inductance or electric capacity
Any one, matching element 342 can also use any one in resistance or electric capacity, matching element 343 can also use
Any one in resistance or electric capacity.
The transmitting-receiving SAW filter 300 can be operated in 8 frequency ranges, 40 frequency ranges and 41 frequency range any frequency ranges, the letter
Number R-T unit can avoid the interference of WIFI signal.
Specific embodiment of the present utility model also provides a kind of mobile terminal, and mobile terminal is received including at least one signal
Transmitting apparatus, signal receiving/transmission device include：Power amplifier module；Receive and dispatch SAW filter, power amplifier module and transmitting-receiving sound table
The distance between face wave filter is more than or equal to a threshold value；Matching network, matching network connection power amplifier module and transmitting-receiving sound
Surface wave filter, matching network include：π types matching unit and the L-type matching unit being connected with π type matching units.
Fig. 4 is refer to, is the structural representation of the mobile terminal of the embodiment of the utility model one.
In the embodiment, mobile terminal includes two signal receiving/transmission devices, respectively the first signal receiving/transmission device
400a and secondary signal R-T unit 400b.
First signal receiving/transmission device 400a includes：Power amplifier module 420a, transmitting-receiving SAW filter 410a and matching
Network 430a.The distance between power amplifier module 420a and transmitting-receiving SAW filter 410a is more than or equal to a threshold value；
Distribution network 430a connection power amplifier module 420a include with transmitting-receiving SAW filter 410a, matching network bag 430a：π types
The L-type matching unit 432a being connected with unit 431a and with π type matching units 431a.
Secondary signal R-T unit 400b includes：Power amplifier module 420b, transmitting-receiving SAW filter 410b and matching
Network 430b.The distance between power amplifier module 420b and transmitting-receiving SAW filter 410b is more than or equal to a threshold value；
Distribution network 430b connection power amplifier module 420b include with transmitting-receiving SAW filter 410b, matching network 430b：π types match
The unit 431b and L-type matching unit 432b being connected with π type matching units 431b.
Signal receiving/transmission device 400a and 400b also include circuit board, cause temperature rise too high to transmitting-receiving in order to avoid radiating is bad
SAW filter 410a and 410b performance impact, signal receiving/transmission device 400a power amplifier module 420a and transmitting-receiving
SAW filter 410a is respectively arranged at the relative two sides of circuit board, or power amplifier module 420a and receipts sound generating surface
Wave filter 410a is arranged at the same face of circuit board, and air line distance between the two is more than or equal to 0.5cm.
Signal receiving/transmission device 400b power amplifier module 420b and transmitting-receiving SAW filter 410b is respectively arranged at electricity
The relative two sides of road plate, or power amplifier module 420a and transmitting-receiving SAW filter 410a are arranged at the same of circuit board
Face, and air line distance between the two is more than or equal to 0.5cm.
By taking signal receiving/transmission device 400a as an example, it is described.In this specific embodiment, L-type matching unit 432a connects
Be connected to π type matching unit 431a and power amplifier module 420a, positioned at π type matching unit 431a and power amplifier module 420a it
Between；In other embodiments of the present utility model, L-type matching unit 432a is connected to transmitting-receiving SAW filter 410a
With π type matching unit 431a, positioned at transmitting-receiving SAW filter 410a and π type matching unit 431a between.
Signal receiving/transmission device 400b structure can be consistent with signal receiving/transmission device 400a structure, can also be different.Compared with
Good, signal receiving/transmission device 400b is consistent with signal receiving/transmission device 400a structure.
Transmitting-receiving SAW filter 410a and transmitting-receiving SAW filter 410b are respectively used to be operated in different frequency ranges, should
In embodiment, transmitting-receiving SAW filter 410a is used to be operated in 40 frequency ranges；Transmitting-receiving SAW filter 420a is used for
38 frequency ranges are operated in, therefore the mobile terminal supports 40 frequency ranges and 38 frequency ranges simultaneously.
In other embodiments of the present utility model, SAW filter 410a and transmitting-receiving sound surface filtering are received and dispatched
Device 410b can also be frequency ranges different in 38 frequency ranges, 40 frequency ranges and 41 frequency ranges.
In other embodiments of the present utility model, mobile terminal can also only include a signal transmitting and receiving and fill
Put, only support a communications band.
In other embodiments of the present utility model, mobile terminal can also include the signal transmitting and receiving of more than three
Device, the corresponding communications band for supporting more than three.
Fig. 3 is refer to, the circuit structure for the signal receiving/transmission device of the mobile terminal of the utility model one embodiment shows
It is intended to.
L-type matching unit 320, including the first matching element 321 and the second matching element 322, in the embodiment, first
It is resistance with element 321, the second matching element is inductance 322.The particular circuit configurations of signal receiving/transmission device are in above-mentioned implementation
Described in mode, do not repeat again.
Above-mentioned mobile terminal includes at least one signal receiving/transmission device, and signal receiving/transmission device can use common transmitting-receiving sound
SAWF, matching network is connected between power amplifier module and transmitting-receiving SAW filter, matching network includes
One π types matching unit and a L-type matching unit, matching network are being realized between power amplifier module and transmitting-receiving SAW filter
While impedance matching, the signal that can also further reduce power amplifier module output reaches the work(of transmitting-receiving SAW filter
Rate, protection transmitting-receiving SAW filter；And the Out-of-band rejection ability and transmission power of transmitting-receiving SAW filter can be improved.
Transmitting-receiving the distance between SAW filter and power amplifier module are more than or equal to a threshold value, avoid because poor heat radiation is to receiving
The performance of sound generating surface wave filter impacts.It therefore, there is no need to be further added by extra bypass transmitting path to realize that WIFI believes
Number transmitting, it is not required that reduce the power of WIFI signal, so as to save goods of furniture for display rather than for use area, minimize mainboard；Also, can
To use common transmitting-receiving SAW filter, cost is relatively low, market ample supply of goods, and can equally realize higher performance,
So that the cost of mobile terminal reduces, performance improves.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
Art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improvements and modifications
Also it should be regarded as the scope of protection of the utility model.
Claims (12)
- A kind of 1. signal receiving/transmission device, it is characterised in that including:Power amplifier module；Receive and dispatch SAW filter, the power amplifier module is more than or waited with described the distance between SAW filter received and dispatched In a threshold value；Matching network, the matching network connect the power amplifier module and the transmitting-receiving SAW filter, the matching Network includes：π types matching unit and the L-type matching unit being connected with the π types matching unit.
- 2. signal receiving/transmission device according to claim 1, it is characterised in that also including circuit board, the power amplification mould Block and the transmitting-receiving SAW filter are respectively arranged at the relative two sides of circuit board.
- 3. signal receiving/transmission device according to claim 1, it is characterised in that the power amplifier module and the transmitting-receiving sound Air line distance between surface wave filter is more than or equal to 0.5cm.
- 4. signal receiving/transmission device according to claim 1, it is characterised in that the L-type matching unit is connected to the receipts Sound generating surface wave filter and the π types matching unit.
- 5. signal receiving/transmission device according to claim 1, it is characterised in that the L-type matching unit is connected to the π types Matching unit and the power amplifier module.
- 6. signal receiving/transmission device according to claim 1, it is characterised in that the transmitting-receiving SAW filter is used for work Any one frequency range in 38 frequency ranges, 40 frequency ranges and 41 frequency ranges.
- 7. a kind of mobile terminal, the mobile terminal includes an at least signal receiving/transmission device, it is characterised in that the signal transmitting and receiving Device includes：Power amplifier module；Receive and dispatch SAW filter, the power amplifier module is more than or waited with described the distance between SAW filter received and dispatched In a threshold value；Matching network, the matching network connect the power amplifier module and the transmitting-receiving SAW filter, the matching Network includes：π types matching unit and the L-type matching unit being connected with the π types matching unit.
- 8. mobile terminal according to claim 7, it is characterised in that the signal receiving/transmission device also includes circuit board, institute State power amplifier module and the transmitting-receiving SAW filter is respectively arranged at the relative two sides of the circuit board.
- 9. mobile terminal according to claim 7, it is characterised in that the power amplifier module and the receipts sound generating surface Air line distance between wave filter is more than or equal to 0.5cm.
- 10. mobile terminal according to claim 7, it is characterised in that the L-type matching unit is connected to the transmitting-receiving sound Surface wave filter and the π types matching unit.
- 11. mobile terminal according to claim 7, it is characterised in that the L-type matching unit is connected to the π types With unit and the power amplifier module.
- 12. mobile terminal according to claim 7, it is characterised in that the transmitting-receiving SAW filter is used to be operated in Any one frequency range in 38 frequency ranges, 40 frequency ranges and 41 frequency ranges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720591653.0U CN207099067U (en) | 2017-05-24 | 2017-05-24 | Signal receiving/transmission device and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720591653.0U CN207099067U (en) | 2017-05-24 | 2017-05-24 | Signal receiving/transmission device and mobile terminal |
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| CN207099067U true CN207099067U (en) | 2018-03-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017914A (en) * | 2017-05-24 | 2017-08-04 | 上海传英信息技术有限公司 | Signal receiving/transmission device and mobile terminal |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107017914A (en) * | 2017-05-24 | 2017-08-04 | 上海传英信息技术有限公司 | Signal receiving/transmission device and mobile terminal |
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