CN108964621A - Filtering framework is strengthened in a kind of radio-frequency power amplifier and its matching - Google Patents
Filtering framework is strengthened in a kind of radio-frequency power amplifier and its matching Download PDFInfo
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- CN108964621A CN108964621A CN201811189567.2A CN201811189567A CN108964621A CN 108964621 A CN108964621 A CN 108964621A CN 201811189567 A CN201811189567 A CN 201811189567A CN 108964621 A CN108964621 A CN 108964621A
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- 238000001914 filtration Methods 0.000 title claims abstract description 17
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 239000003990 capacitor Substances 0.000 claims description 27
- 230000005611 electricity Effects 0.000 claims 2
- 238000013461 design Methods 0.000 abstract description 3
- 230000005764 inhibitory process Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000002401 inhibitory effect Effects 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 230000001413 cellular effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/56—Modifications of input or output impedances, not otherwise provided for
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/24—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers of transmitter output stages
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The present invention provides a kind of radio-frequency power amplifier and its filtering framework is strengthened in matching.The framework includes: input inductance, and one end connects RF signal input end；First trap circuit, one end connect the other end of the input inductance and one end with resistance circuit, and the other end connects power ground；The band resistance circuit, the other end connect one end of the second trap circuit and one end of band-pass circuit；Second trap circuit, the other end connect the power ground；Band-pass circuit, the other end connect RF signal output.The present invention greatly reduces the design difficulty of power-amplifier front-end, provides the harmonic inhibition capability of 50dbc or more in 1.4GHz-3.8GHz, 350MHz-450MHz offer is more than the half-wave rejection ability of 10dbc, while being lower than 1.7db with interior Insertion Loss.
Description
Technical field
The present invention relates to radio-frequency power amplifier fields, and in particular to filter is strengthened in a kind of radio-frequency power amplifier and its matching
Wave framework.
Background technique
Increasingly developed with the communication technology, the requirement to radio-frequency power amplifier is also higher and higher.With NB-IoT radio frequency
For power amplifier, NB-IoT (Narrow Band Internet of Things, narrowband Internet of Things) is all things on earth internet
One important branch of network.NB-IoT is implemented in cellular network, only consumes the bandwidth of about 180KHz, can be deployed directly into GSM
Network (Global System for Mobile Communications, global system for mobile communications), UMTS network
(Universal Mobile Telecommunications System, Universal Mobile Telecommunications System) or LTE network (Long
Term Evolution, long term evolution), to reduce lower deployment cost, realize smooth upgrade.
NB-IoT is the emerging technology in one, the field IoT, and low power consuming devices is supported to connect in the cellular data of wide area network,
It is regarded as low-power consumption wide area network (LPWAN).NB-IoT supports that stand-by time is long, connecting to the efficient of network connectivity requirements higher device
It connects.It is said that the NB-IoT device battery service life can be improved at least 10 years, while can also provide very comprehensive indoor cellular data
Connection covering.In NB-IoT radio-frequency power amplifier, harmonics restraint also has high-order harmonic wave generally since 1.4GHz
It controls consumption.
In traditional 2G communication system, for the harmonics restraint of NB-IoT radio-frequency power amplifier low frequency only need from
1.6GHz starting.NB-IoT RF system of new generation then requires harmonics restraint since 1.4GHz, additionally also requires to be added
The half-wave of 350MHz-460MHz 10dbc inhibits, and this considerably increases the research and development difficulty of NB-IoT radio-frequency power amplifier front end.
Traditional filter matching network often increase specific trap circuit after being matched to 50 ohm enhance filtering, this
Also additional radio frequency link loss and NB-IoT radio-frequency power amplifier research and development cost be will increase.
Summary of the invention
The embodiment of the invention provides a kind of matchings of radio-frequency power amplifier to strengthen filtering framework, comprising:
Inductance is inputted, one end connects RF signal input end；
First trap circuit, one end connect the other end of the input inductance and one end with resistance circuit, other end connection
Power ground；
The band resistance circuit, the other end connect one end of the second trap circuit and one end of band-pass circuit；
Second trap circuit, the other end connect the power ground；
Band-pass circuit, the other end connect RF signal output.
Further, first trap circuit includes concatenated second capacitor, the second inductance.
Further, described with resistance circuit includes third capacitor in parallel, third inductance.
Further, second trap circuit includes concatenated 4th capacitor, the 4th inductance.
Further, the band-pass circuit includes concatenated 5th inductance, the 5th capacitor.
Further, the input inductance, the second capacitor, the second inductance, third inductance, third capacitor, the 4th capacitor,
Four inductance match the RF signal output impedance to 50 ohm.
Further, first trap circuit is different with the second trap circuit frequency.
Further, the band-pass circuit resonance is in basic frequency.
Further, the framework 1.4GHz-3.8GHz frequency provide be more than 50dbc harmonics restraint, in 350MHz-
The offer of 450MHz frequency is more than that the half-wave of 10dbc inhibits；The framework is less than 1.7db with interior Insertion Loss.
The embodiment of the present invention also provides a kind of radio-frequency power amplifier, including a kind of radio-frequency power amplifier described above
Matching strengthen filtering framework.
The technical solution that the embodiment of the present invention provides, greatly reduces the design difficulty of radio-frequency power amplifier front end,
The harmonic inhibition capability of 50dbc or more is provided in 1.4GHz-3.8GHz, 350MHz-450MHz offer is more than the half-wave suppression of 10dbc
Ability processed, while being lower than 1.7db with interior Insertion Loss.
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 that the composition schematic diagram of filtering framework is strengthened in a kind of matching of traditional radio-frequency power amplifier；
Fig. 2 is that filtering framework composition signal is strengthened in a kind of matching for radio-frequency power amplifier that one embodiment of the invention provides
Figure；
Fig. 3 is that the inhibitory effect schematic diagram of filtering framework is strengthened in the matching of Fig. 1；
Fig. 4 is that filtering framework inhibitory effect schematic diagram is strengthened in the matching of Fig. 2；
Fig. 5 is a kind of radio-frequency power amplifier 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 that the composition schematic diagram of filtering framework is strengthened in a kind of matching of traditional radio-frequency power amplifier.Such as Fig. 1 institute
Show, traditional solution, radiofrequency signal is inputted from input terminal, will be hindered by the several matching elements of L1, C1, L4, L2, C2, L5
Anti- to be matched to 50 ohm, wherein C1, L4, C2, L5 are respectively designed to the trap circuit of two different frequencies, and one is designed to inhibit
Three ranks and four order harmonics, another inhibits high-frequency harmonic.L3, C3 are the band resistance circuits for 350MHz-450MHz design, and C4 is
Capacitance.
Fig. 3 is that the inhibitory effect schematic diagram of filtering framework is strengthened in the matching of Fig. 1.As shown in figure 3, m1-m11 is each frequency
Harmonic suppression effect.When frequency is 350MHz, half-wave inhibits m1=-13.714db.When frequency is 460MHz, half-wave inhibits m2
=-24.171db.When frequency is 700MHz, all-wave inhibits m3=-1.867db.When frequency is 915MHz, all-wave inhibits m4=-
1.678db.When frequency is 1.400GHz, second harmonic inhibits m6=-52.278db.When frequency is 1.830GHz, second harmonic
Inhibit m7=-39.691db.When frequency is 2.100GHz, triple-frequency harmonics inhibits m8=-42.803db.Frequency is 2.750GHz
When, triple-frequency harmonics inhibits m9=-63.458db.When frequency is 2.400GHz, four-time harmonic inhibits m10=-48.619db.Frequency
When for 3.800GHz, four-time harmonic inhibits m11=-46.905db.
As it can be seen that traditional framework can provide the rejection ability of about 40-50dbc, the half-wave more than 10dbc inhibits energy
Power, while with interior Insertion Loss about in 1.7-1.9db.
Fig. 2 is that filtering framework composition signal is strengthened in a kind of matching for radio-frequency power amplifier that one embodiment of the invention provides
Figure.The framework includes input inductance L1, the first trap circuit, band resistance circuit, the second trap circuit, band-pass circuit.
The one end for inputting inductance L1 connects RF signal input end P1.One end connection input inductance L1 of first trap circuit
The other end and one end with resistance circuit, the other end connect power ground.The other end with resistance circuit connects the second trap circuit
One end of one end and band-pass circuit.The other end of second trap circuit connects power ground.The other end of band-pass circuit connects radio frequency
Signal output end.
First trap circuit includes concatenated second capacitor C2, the second inductance L2.One end of second capacitor C2 connects input
Inductance L1 and tie point with resistance circuit, the other end of the second capacitor C2 connect one end of the second inductance L2, the second inductance L2's
The other end connects power ground.It include third capacitor C3, third inductance L3 in parallel with resistance circuit.Second trap circuit includes series connection
The 4th capacitor C4, the 4th inductance L4.The tie point of one end the connecting band resistance circuit and band-pass circuit of 4th capacitor C4, the other end
One end of the 4th inductance L4 is connected, the other end of the 4th inductance L4 connects power ground.Band-pass circuit includes concatenated 5th inductance
L5, the 5th capacitor C5.The tie point of one end the connecting band resistance circuit and the second trap circuit of 5th inductance L5, other end connection the
The other end of one end of five capacitor C5, the 5th capacitor C5 connects RF signal output.
Input inductance L1, the second capacitor C2, the second inductance L2, third inductance L3, third capacitor C3, the 4th capacitor C4, the
Four inductance L4 match RF signal output impedance to 50 ohm.
First trap circuit and the second trap circuit frequency are different.Band-pass circuit resonates in basic frequency.5th capacitor C5 is same
When be also used as capacitance.
Fig. 4 is that filtering framework inhibitory effect schematic diagram is strengthened in the matching of Fig. 2.As shown in figure 4, m1-m11 is each frequency
Harmonic suppression effect.When frequency is 350MHz, half-wave inhibits m1=-19.079db.When frequency is 460MHz, half-wave inhibits m2
=-13.760db.When frequency is 700MHz, all-wave inhibits m3=-1.696db.When frequency is 915MHz, all-wave inhibits m4=-
1.667db.When frequency is 1.4GHz, second harmonic inhibits m6=-64.657db.When frequency is 1.830GHz, second harmonic suppression
M7=-53.880db processed.When frequency is 2.100GHz, triple-frequency harmonics inhibits m8=-51.796db.When frequency is 2.750GHz,
Triple-frequency harmonics inhibits m9=-57.595db.When frequency is 2.400GHz, four-time harmonic inhibits m10=-53.021db.Frequency is
When 3.800GHz, four-time harmonic inhibits m11=-51.718db.
The framework is in the harmonics restraint that the offer of 1.4GHz-3.8GHz frequency is more than 50dbc, in 350MHz-450MHz frequency
Offer is more than that the half-wave of 10dbc inhibits.Framework is less than 1.7db with interior Insertion Loss.Better than conventional architectures.
Output matching in radio-frequency power amplifier is the key that direct decision radio-frequency power amplifier performance.Using this
Matching strengthen filter structure, filtered out more than it is spuious, the linearity of power amplifier can be improved, and no longer need to using
Additional filter can greatly save space and the cost of radio-frequency front-end.
Fig. 5 is a kind of radio-frequency power amplifier that one embodiment of the invention provides.As shown in figure 5, the radio-frequency power amplifies
Device 1 includes that filtering framework is strengthened in a kind of matching of radio-frequency power amplifier described above.
Since NB-IoT radio-frequency power amplifier is higher to harmonic requirement, so above-mentioned matching is strengthened filter structure and is used
In NB-IoT radio-frequency power amplifier, more properly.
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. filtering framework is strengthened in a kind of matching of radio-frequency power amplifier, comprising:
Inductance is inputted, one end connects RF signal input end；
First trap circuit, one end connect the other end of the input inductance and one end with resistance circuit, and the other end connects power supply
Ground；
The band resistance circuit, the other end connect one end of the second trap circuit and one end of band-pass circuit；
Second trap circuit, the other end connect the power ground；
Band-pass circuit, the other end connect RF signal output.
2. framework according to claim 1, wherein first trap circuit includes concatenated second capacitor, the second electricity
Sense.
3. framework according to claim 2, wherein described with resistance circuit includes third capacitor in parallel, third inductance.
4. framework according to claim 3, wherein second trap circuit includes concatenated 4th capacitor, the 4th electricity
Sense.
5. framework according to claim 4, wherein the band-pass circuit includes concatenated 5th inductance, the 5th capacitor.
6. framework according to claim 5, wherein the input inductance, the second capacitor, the second inductance, third inductance,
Three capacitors, the 4th capacitor, the 4th inductance match the RF signal output impedance to 50 ohm.
7. framework according to claim 1, wherein first trap circuit and the second trap circuit frequency are not
Together.
8. framework according to claim 1, wherein the band-pass circuit resonance is in basic frequency.
9. framework according to claim 1, wherein the framework is more than 50dbc's in the offer of 1.4GHz-3.8GHz frequency
Harmonics restraint inhibits in the half-wave that the offer of 350MHz-450MHz frequency is more than 10dbc；The framework is less than with interior Insertion Loss
1.7db。
10. a kind of radio-frequency power amplifier, including a kind of described in any item radio-frequency power amplifiers of the claim 1 to 9
Matching strengthen filtering framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811189567.2A CN108964621A (en) | 2018-10-12 | 2018-10-12 | Filtering framework is strengthened in a kind of radio-frequency power amplifier and its matching |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811189567.2A CN108964621A (en) | 2018-10-12 | 2018-10-12 | Filtering framework is strengthened in a kind of radio-frequency power amplifier and its matching |
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| CN108964621A true CN108964621A (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113411062A (en) * | 2021-08-19 | 2021-09-17 | 深圳飞骧科技股份有限公司 | Matching circuit, radio frequency front end power amplifying circuit and mobile communication equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1349681A (en) * | 1997-07-03 | 2002-05-15 | 艾利森公司 | Impedance matching circuit for power amplifier |
| US20060141978A1 (en) * | 2004-12-23 | 2006-06-29 | Lianjun Liu | Compact radio frequency harmonic filter using integrated passive device technology |
| US20130187712A1 (en) * | 2012-01-23 | 2013-07-25 | Qualcomm Incorporated | Impedance matching circuit with tunable notch filters for power amplifier |
| CN104579189A (en) * | 2015-02-04 | 2015-04-29 | 广东工业大学 | Circuit structure for improving harmonic performance of radio frequency power amplifier |
| CN107370460A (en) * | 2017-07-12 | 2017-11-21 | 深圳国民飞骧科技有限公司 | A kind of circuit structure and method for improving radio-frequency power amplifier harmonic inhibition capability |
| CN208904969U (en) * | 2018-10-12 | 2019-05-24 | 深圳飞骧科技有限公司 | Filtering framework is strengthened in a kind of radio-frequency power amplifier and its matching |
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2018
- 2018-10-12 CN CN201811189567.2A patent/CN108964621A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1349681A (en) * | 1997-07-03 | 2002-05-15 | 艾利森公司 | Impedance matching circuit for power amplifier |
| US20060141978A1 (en) * | 2004-12-23 | 2006-06-29 | Lianjun Liu | Compact radio frequency harmonic filter using integrated passive device technology |
| US20130187712A1 (en) * | 2012-01-23 | 2013-07-25 | Qualcomm Incorporated | Impedance matching circuit with tunable notch filters for power amplifier |
| CN104579189A (en) * | 2015-02-04 | 2015-04-29 | 广东工业大学 | Circuit structure for improving harmonic performance of radio frequency power amplifier |
| CN107370460A (en) * | 2017-07-12 | 2017-11-21 | 深圳国民飞骧科技有限公司 | A kind of circuit structure and method for improving radio-frequency power amplifier harmonic inhibition capability |
| CN208904969U (en) * | 2018-10-12 | 2019-05-24 | 深圳飞骧科技有限公司 | Filtering framework is strengthened in a kind of radio-frequency power amplifier and its matching |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113411062A (en) * | 2021-08-19 | 2021-09-17 | 深圳飞骧科技股份有限公司 | Matching circuit, radio frequency front end power amplifying circuit and mobile communication equipment |
| WO2023020014A1 (en) * | 2021-08-19 | 2023-02-23 | 深圳飞骧科技股份有限公司 | Matching circuit, radio frequency front end power amplification circuit, and mobile communication device |
| US11936408B2 (en) | 2021-08-19 | 2024-03-19 | Lansus Technologies Inc. | Matching circuit, radio frequency front-end power amplification circuit, and mobile communication device |
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