CN109167605A - RF front end structure and mobile terminal - Google Patents
RF front end structure and mobile terminal Download PDFInfo
- Publication number
- CN109167605A CN109167605A CN201811347527.6A CN201811347527A CN109167605A CN 109167605 A CN109167605 A CN 109167605A CN 201811347527 A CN201811347527 A CN 201811347527A CN 109167605 A CN109167605 A CN 109167605A
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- filter
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- power amplifier
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- 230000003321 amplification Effects 0.000 claims abstract description 10
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 10
- 230000009466 transformation Effects 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 abstract description 4
- 230000037431 insertion Effects 0.000 abstract description 4
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 241001314440 Triphora trianthophoros Species 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract description 2
- 239000004575 stone Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 230000003071 parasitic effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
-
- 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
- H04B2001/0408—Circuits with power amplifiers
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Amplifiers (AREA)
Abstract
The present invention provides a kind of RF front end structure and mobile terminal.The RF front end structure includes: radio-frequency power amplifier, realizes the power amplification of radiofrequency signal；Filter is connected with the collector of radio-frequency power amplifier, and input impedance is directly transformed to the impedance to match with the load impedance of the radio-frequency power amplifier, is filtered to the radiofrequency signal of amplification；Matching network connects the filter, carries out matching convergence to the input impedance of the filter；RF switch, one end connect the filter by the matching network, and the other end connects antenna, filtered radio signal transmission is emitted to the antenna.RF front end structure provided by the invention not only eliminates the Insertion Loss of extra impedance converting network generation, decreases matching component, while reducing cost, also it can reduce package dimension, be killing three birds with one stone, meet the following mobile terminal low cost, the application demand of small size.
Description
Technical field
The present invention relates to radio-frequency power amplifier fields, and in particular to RF front end structure and mobile terminal.
Background technique
RF front-end circuit applied to terminal such as mobile phone generally includes radio-frequency power amplifier (RF PA), radio frequency is opened
Close (RF Switch) and filter.Filter be filter (Filter) or duplexer (Duplexer),
It is that radio-frequency power amplifier and RF switch are integrated in inside a radio-frequency module inside traditional framework, filtering
Device is individually located among radio-frequency power amplifier and antenna.Inside this traditional framework, radio-frequency module and filtering dress
Setting all is as individual discrete device, and the impedance of input/output port is all by matching internal to 50 ohm.
With the fast development of communication terminal, RF front-end module is also toward small size, inexpensive direction evolution.Radio-frequency module
Integrated with filter is increasingly becoming market mainstream direction.The big collection of radio-frequency power amplifier, RF switch and filter
It comes into being at module, in the industry referred to as PAMiD (Power Amplifier Module integrated Duplexer).It is this kind of
Product integrated level is higher, and rear end Insertion Loss is smaller, and performance is more preferable, and cost is lower, also reduces the match complexity of Client handset plate.
Although similar product currently on the market still uses inventors have found that PAMiD product has many advantages
50 ohm of interface impedances as radio-frequency module and filter, i.e. filter are transformed into 50 ohm by matching network, so
Radio-frequency module passes through the load impedance (3~4 ohm) that a matching network is transformed into radio-frequency module transistor from 50 ohm again afterwards.
It is this that additional component cost and back end signal path Insertion Loss will increase by 50 ohm of technologies as bridge joint.
Summary of the invention
In view of the above-mentioned problems, the embodiment of the present invention is quasi- to provide a kind of new RF front end structure and mobile terminal, without
The transformation of 50 ohmages is crossed as bridge joint, directly by the input impedance conversion of filter to radio-frequency power amplifier work when institute
The Low ESR needed, i.e., 3~4 ohm.
The embodiment of the invention provides a kind of RF front end structures, comprising: radio-frequency power amplifier realizes radiofrequency signal
Power amplification；Filter is connected with the collector of radio-frequency power amplifier, and input impedance is directly transformed to penetrate with described
The impedance that the load impedance of frequency power amplifier matches is filtered the radiofrequency signal of amplification；Matching network, described in connection
Filter carries out matching convergence to the input impedance of the filter；RF switch, one end are connected by the matching network
The filter is connect, the other end connects antenna, filtered radio signal transmission is emitted to the antenna.
The embodiment of the present invention also provides a kind of mobile terminal, including a kind of RF front end structure described above.
The RF front end structure that the embodiment of the present invention provides not only eliminates inserting for extra impedance converting network generation
Damage, decreases matching component, while reducing cost, also can reduce package dimension, be killing three birds with one stone, meet future
Terminal low cost, the application demand of small size.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of composition schematic diagram of traditional RF front end structure；
Fig. 2 is a kind of RF front end structure composition schematic diagram that one embodiment of the invention provides；
Fig. 3 is a kind of mobile terminal composition schematic diagram that one embodiment of the invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to drawings and examples,
The specific embodiment progress of technical solution of the present invention in further detail, is clearly illustrated.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than limiting the invention.It only contains a part of the invention and implements
Example, instead of all the embodiments, the other embodiments that those skilled in the art obtain various change of the invention all belong to
In the scope of protection of the invention.
Although it should be understood that the first, second, third, etc. term can be used in this article be used to describe various elements or
Component, but these elements or component should not be limited by these terms.These terms only to distinguish an element or component with
Another element or component.Therefore, the first element or component of following the discussion, holds within the present invention not departing from, is referred to alternatively as
Second element or the second component.
Fig. 1 is a kind of composition schematic diagram of traditional RF front end structure.As shown in Figure 1, traditional RF front end structure
Including radio-frequency power amplifier 11, filter 12, RF switch 13, the first matching network 14, the second matching network 15, third
Distribution network 16.
11 transistor will pass through three matching networks from antenna to radio-frequency power amplifier.First matching network 14 is general
For the parasitic capacitance inside resonance filter 12, so that the input impedance Z1 of filter 12 seems more on Smith chart
It adds and holds back, the impedance in entire working frequency range is more concentrated, and high, normal, basic channel performance is consistent.Second matching network 15 is used for impedance
The input impedance Z1 of filter 12, is transformed to the impedance position Z2 of needs by transformation, and usually 50 ohm herein.Third matching
50 ohm of impedances nearby are transformed to the load impedance Z3 of transistor by network 16 via RF switch 13, are usually put in mobile phone power
The application scenarios of big device, Z3 generally in 4 ohms, the impedance by radio-frequency power amplifier 11 operating voltage and output power
It determines or load balance factor (loadpull) determines.
Fig. 2 is a kind of RF front end structure composition schematic diagram that one embodiment of the invention provides.As shown in Fig. 2, before radio frequency
End-rack structure includes radio-frequency power amplifier 21, filter 22, RF switch 23, matching network 24.
The power amplification of the realization radiofrequency signal of radio-frequency power amplifier 21.Filter 22 and radio-frequency power amplifier 21
Collector is connected, and input impedance is directly transformed to the impedance to match with the load impedance of radio-frequency power amplifier 21, right
The radiofrequency signal of amplification is filtered.Matching network 24 connects filter 22, the input impedance progress to filter 22
With convergence.One end of RF switch 23 connects filter 22 by matching network 24, and the other end connects antenna, will be filtered
Radio signal transmission is emitted to antenna.
RF front end structure further includes controller, and controller controls the opening and closing of RF switch 23.
Radio-frequency power amplifier 21 includes power discharging transistor, and base stage receives radiofrequency signal, and emitter connects power ground,
Collector connects filter 22.The load impedance of radio-frequency power amplifier 21 is 3-4 ohm.
RF switch 23 includes but is not limited to single pole multiple throw, the switching for transmission channel.
Filter 22 includes but is not limited to filter or duplexer.Filter 22 includes filter circuit, resonant transformation
Network.Filter circuit is filtered the radiofrequency signal of amplification.Resonant transformation network is directly transformed to input impedance and radio frequency
The impedance that the load impedance of power amplifier 21 matches.Input impedance is 3-4 ohm.
When filter 22 is duplexer, duplexer is equivalent to two filters, and two one, filter can be set to
Emission filter is applied in transmitting path.Another can be set to receiving filter, apply in receiving path.
The internal parasitic capacitances of 24 resonator, filter device of matching network, so that the input impedance Z1 of filter 22 is close in history
Seem more to restrain on this circle diagram.Matching network 24 is real using 22 internal parasitic capacitances of filter and integrated spiral inductance
It is existing, the input impedance of filter 22 is directly matched to required position.
The radio-frequency front-end PAMiD framework of invention is optimized by input impedance to filter internal, eliminates the
The resonant transformation network that filter internal integrates is passed through in two matching networks and third matching network, the input impedance of filter, directly
It connects and impedance is converted into Z3, i.e., close to 4 ohmage positions needed for radio-frequency power amplifier work, evaded conventional front-end frame
Filter is first matched to 50 ohm by structure, then transforms to 50 ohm again by the output matching of the rear end PA 4 ohm of complicated mistake
Journey.On the one hand reduce the two matching network bring Insertion Loss (about 1.2dB), on the other hand eliminate Surface Mount Component
(SMD) or the matching cost of filter and brought packaging cost, while the reduction for matching material also brings encapsulation
The diminution of size meets future terminal low cost, the application demand of small size.
Fig. 3 is a kind of mobile terminal composition schematic diagram that one embodiment of the invention provides.
A kind of mobile terminal 2 includes RF front end structure shown in Fig. 2.
This mobile terminal integrated level is higher, and performance is more preferable, and cost is lower.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the present invention rather than limits this
The range of invention, those skilled in the art should understand that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent replacement that the present invention carries out, should all cover within the scope of the present invention.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of come using.
Claims (10)
1. a kind of RF front end structure, comprising:
Radio-frequency power amplifier realizes the power amplification of radiofrequency signal；
Filter is connected with the collector of radio-frequency power amplifier, and input impedance is directly transformed to and the radio frequency function
The impedance that the load impedance of rate amplifier matches is filtered the radiofrequency signal of amplification；
Matching network connects the filter, carries out matching convergence to the input impedance of the filter；
RF switch, one end connect the filter by the matching network, and the other end connects antenna, penetrates filtered
Frequency signal is transferred to the antenna and is emitted.
2. framework according to claim 1, wherein further include:
Controller controls the opening and closing of the RF switch.
3. framework according to claim 1, wherein the radio-frequency power amplifier includes:
Power discharging transistor, base stage receive radiofrequency signal, and emitter connects power ground, and the collector connects the filtering dress
It sets.
4. framework according to claim 1, wherein the load impedance of the radio-frequency power amplifier is 3-4 ohm.
5. framework according to claim 1, wherein the filter includes filter or duplexer.
6. framework according to claim 1, wherein the filter includes:
Filter circuit is filtered the radiofrequency signal of amplification；
The input impedance is directly transformed to match with the load impedance of the radio-frequency power amplifier by resonant transformation network
Impedance.
7. framework according to claim 1, wherein the input impedance is 3-4 ohm.
8. framework according to claim 1, wherein the endophyte electricity of filter described in the matching network resonance
Hold.
9. framework according to claim 1, wherein the RF switch includes single pole multiple throw.
10. a kind of mobile terminal, including a kind of described in any item RF front end structures of the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347527.6A CN109167605A (en) | 2018-11-13 | 2018-11-13 | RF front end structure and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347527.6A CN109167605A (en) | 2018-11-13 | 2018-11-13 | RF front end structure and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109167605A true CN109167605A (en) | 2019-01-08 |
Family
ID=64877144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811347527.6A Pending CN109167605A (en) | 2018-11-13 | 2018-11-13 | RF front end structure and mobile terminal |
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| Country | Link |
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| CN (1) | CN109167605A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022022439A1 (en) * | 2020-07-31 | 2022-02-03 | 诺思(天津)微系统有限责任公司 | Radio frequency module design method, radio frequency module, and communication device |
| CN114928939A (en) * | 2022-05-12 | 2022-08-19 | 成都频岢微电子有限公司 | Radio frequency front end chip matching network structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007274247A (en) * | 2006-03-30 | 2007-10-18 | Kyocera Corp | Wireless communication circuit device and wireless communication system |
| US20120208473A1 (en) * | 2011-02-11 | 2012-08-16 | Qualcomm Incorporated | Front-end rf filters with embedded impedance transformation |
| WO2015017406A1 (en) * | 2013-08-01 | 2015-02-05 | Rf Micro Devices, Inc. | Tunable rf filter structure having coupled resonators |
| US20170302250A1 (en) * | 2015-10-06 | 2017-10-19 | Resonant Inc. | Radio frequency transmit filter with integrated impedance matching network |
| CN108011600A (en) * | 2017-09-08 | 2018-05-08 | 牛旭 | A kind of restructural radio frequency and microwave power amplifier |
| CN208939929U (en) * | 2018-11-13 | 2019-06-04 | 深圳飞骧科技有限公司 | RF front end structure and mobile terminal |
-
2018
- 2018-11-13 CN CN201811347527.6A patent/CN109167605A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007274247A (en) * | 2006-03-30 | 2007-10-18 | Kyocera Corp | Wireless communication circuit device and wireless communication system |
| US20120208473A1 (en) * | 2011-02-11 | 2012-08-16 | Qualcomm Incorporated | Front-end rf filters with embedded impedance transformation |
| CN103380573A (en) * | 2011-02-11 | 2013-10-30 | 高通股份有限公司 | Front-end RF filters with embedded impedance transformation |
| WO2015017406A1 (en) * | 2013-08-01 | 2015-02-05 | Rf Micro Devices, Inc. | Tunable rf filter structure having coupled resonators |
| US20170302250A1 (en) * | 2015-10-06 | 2017-10-19 | Resonant Inc. | Radio frequency transmit filter with integrated impedance matching network |
| CN108011600A (en) * | 2017-09-08 | 2018-05-08 | 牛旭 | A kind of restructural radio frequency and microwave power amplifier |
| CN208939929U (en) * | 2018-11-13 | 2019-06-04 | 深圳飞骧科技有限公司 | RF front end structure and mobile terminal |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022022439A1 (en) * | 2020-07-31 | 2022-02-03 | 诺思(天津)微系统有限责任公司 | Radio frequency module design method, radio frequency module, and communication device |
| CN114928939A (en) * | 2022-05-12 | 2022-08-19 | 成都频岢微电子有限公司 | Radio frequency front end chip matching network structure |
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Address after: 518000 1601, building 1, shuimuyifang building, No. 286, Nanguang Road, dawangshan community, Nantou street, Nanshan District, Shenzhen, Guangdong Applicant after: Shenzhen Feiyu Technology Co.,Ltd. Address before: 518057 318, 3F, building B, Guoren building, kejizhong Third Road, Science Park, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: LANSUS TECHNOLOGIES Inc. |