CN103095228A - Intermodulation suppression amplifying circuit and control method - Google Patents
Intermodulation suppression amplifying circuit and control method Download PDFInfo
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- CN103095228A CN103095228A CN2013100099690A CN201310009969A CN103095228A CN 103095228 A CN103095228 A CN 103095228A CN 2013100099690 A CN2013100099690 A CN 2013100099690A CN 201310009969 A CN201310009969 A CN 201310009969A CN 103095228 A CN103095228 A CN 103095228A
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Abstract
The invention discloses an intermodulation suppression amplifying circuit and a control method. The intermodulation suppression amplifying circuit comprises a power divider, adjustable phase shifters, variable gain adjustable amplifiers, a circuit combiner, couplers, adjustable attenuators and a microcontroller. After radio-frequency signals are inputted to the power divider, the radio-frequency signals are divided into two paths. One path is amplified by a variable gain adjustable amplifier 1 through an adjustable attenuator 1, and then partial signals are coupled out through a coupler 1 and a coupler 2; and in the other path, signals passing through an adjustable phase shifter 1 are mixed in the circuit combiner to counteract main signals, the path of signals counteracting the main signals pass through an adjustable attenuator 2, an adjustable phase shifter 2 and a variable gain adjustable amplifier 2 and then achieve intermodulation suppression with the original path of signals in the couplers, and thus the main signals are outputted. The intermodulation suppression amplifying circuit and the control method have the advantages that through the using of two amplifiers with identical nonlinear characteristics, requirements of adjacent-channel interference suppression, a communication system high target, communication system high performance, and capacity increase in wideband communication are met.
Description
Technical field
The present invention relates to a kind of amplifying circuit and control method, more specifically, it relates to a kind of intermodulation suppression amplifying circuit and control method.
Background technology
All can there be the puzzlement of intermodulation suppression in the equipment such as communication that every use radiofrequency signal is amplified.Amplifying circuit in the past is all generally that employing increase filter after amplifier realizes exporting intermodulation suppression, but inserts the excess loss that filter can bring main signal in link, can have simultaneously the problem of inband flatness.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of satisfy adjacent-channel interference inhibition in broadband connections, communication system high target, high performance intermodulation suppression amplifying circuit and control method are provided.
The objective of the invention is to be achieved through the following technical solutions.This intermodulation suppression amplifying circuit comprises power splitter, adjustable phase shifter, gain adjustable amplifier, mixer, coupler, adjustable attenuator and microcontroller; After radiofrequency signal input power splitter, be divided into two-way, the one tunnel through after adjustable attenuator 1 by gain adjustable amplifier 1, amplify, and then be coupled out part signal through coupler 1, coupler 2; Another road mixes to offset main signal through the signal of adjustable phase shifter 1 in mixer,
Offset this road signal of main signal again through realizing intermodulation suppression with a road original signal in coupler 2 after adjustable attenuator 2, adjustable phase shifter 2, gain adjustable amplifier 2, the output main signal.
As preferably: 2 pairs of signals of gain adjustable amplifier 1 and gain adjustable amplifier carry out anti-phase.
As preferably: the 3dB power splitter that the merit such as employing is divided is set at the power splitter of radiofrequency signal input.
As preferably: at the power splitter of radiofrequency signal input, employing is set and does not wait the merit separating method.
As preferably: close road stage coupler at last signal and also can adopt mixer to substitute.
As preferably: comprise two radio-frequency power amplifiers and two-way radiofrequency signal.
As preferably: comprise at least three radio-frequency power amplifiers and at least three tunnel radiofrequency signals.
The control method of intermodulation suppression amplifying circuit: the phase shifter phase adjusted of microcontroller, pad value are regulated, amplifier gain is finely tuned algorithm after regulating and all adopting first coarse adjustment; When just powering on, the two paths of signals of system, amplitude, phase difference value may be larger, and this moment, microcontroller employing coarse adjustment was large stepping algorithm; When both the power level difference hour, it is that algorithm is advanced in small step that microcontroller adopts fine setting; Until final output signal intermodulation suppression is obtained the best.
The invention has the beneficial effects as follows: by having used two duplicate amplifiers of nonlinear characteristic, insert with thoroughly solving the excess loss that filter can bring main signal in link, satisfy adjacent-channel interference inhibition in broadband connections, the communication system high target, high-performance increases the requirement of capacity.
Description of drawings
Fig. 1 is principle of the invention block diagram;
Fig. 2 is the frequency spectrum/phase place situation map of signal each node in link.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described further.Although the present invention is described in connection with preferred embodiment, should know, do not represent to limit the invention in described embodiment.On the contrary, the present invention will be contained alternative, modified model and the equivalent in the scope of the present invention that can be included in attached claims restriction.
To shown in Figure 2, this intermodulation suppression amplifying circuit comprises power splitter, adjustable phase shifter, gain adjustable amplifier, mixer, coupler, adjustable attenuator and microcontroller as Fig. 1.After radiofrequency signal input power splitter, be divided into two-way, the one tunnel through after adjustable attenuator 1 by gain adjustable amplifier 1, amplify (signal is inverted), and then be coupled out part signal through coupler 1, coupler 2; Another road mixes to offset main signal through the signal of adjustable phase shifter 1 in mixer, this road signal of offsetting main signal passes through adjustable attenuator 2 again, adjustable phase shifter 2, gain adjustable amplifier 2(signal is inverted) realize intermodulation suppression with another original road signal in coupler 2 afterwards, output main signal, coupler 2 also can adopt mixer to substitute.3dB power splitter the power splitter setting of radiofrequency signal input such as can adopt to divide at the merit also can adopt and not wait the merit separating method.Comprise two radio-frequency power amplifiers and two-way radiofrequency signal.
The phase shifter phase adjusted of microcontroller, pad value are regulated, amplifier gain is finely tuned algorithm after regulating and all adopting first coarse adjustment; When just powering on, the two paths of signals of system, amplitude, phase difference value may be larger, and this moment, microcontroller adopted coarse adjustment (being large stepping) algorithm; When less (as less than 1dB), microcontroller adopts fine setting (being little stepping) algorithm when both power level difference; Until final output signal intermodulation suppression is obtained the best.
Claims (5)
1. an intermodulation suppression amplifying circuit, is characterized in that: comprise power splitter, adjustable phase shifter, gain adjustable amplifier, mixer, coupler, adjustable attenuator and microcontroller; After radiofrequency signal input power splitter, be divided into two-way, the one tunnel is amplified by gain adjustable amplifier 1 through after adjustable attenuator 1, and then is coupled out part signal through coupler 1, coupler 2; Another road is mixed for offsetting main signal through the signal of adjustable phase shifter 1 in mixer, offset this road signal of main signal again through realizing intermodulation suppression with a road original signal in coupler 2 after adjustable attenuator 2, adjustable phase shifter 2, gain adjustable amplifier 2, the output main signal.
2. intermodulation suppression amplifying circuit according to claim 1 is characterized in that: described gain adjustable amplifier 1 and gain adjustable amplifier 2 are used for carrying out anti-phase to signal.
3. intermodulation suppression amplifying circuit according to claim 1 is characterized in that: the 3dB power splitter that the merit such as employing is divided is set at the power splitter of radiofrequency signal input.
4. intermodulation suppression amplifying circuit according to claim 1 is characterized in that: described coupler 2 adopts mixers to substitute.
5. control method that adopts intermodulation suppression amplifying circuit as claimed in claim 1, it is characterized in that: the phase shifter phase adjusted of microcontroller, pad value are regulated, amplifier gain is finely tuned algorithm after regulating and all adopting first coarse adjustment; When just powering on, it is large stepping algorithm that microcontroller adopts coarse adjustment; During less than 1dB, it is that algorithm is advanced in small step that microcontroller adopts fine setting when both power level difference; Until final output signal intermodulation suppression is obtained the best.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100099690A CN103095228A (en) | 2013-01-10 | 2013-01-10 | Intermodulation suppression amplifying circuit and control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100099690A CN103095228A (en) | 2013-01-10 | 2013-01-10 | Intermodulation suppression amplifying circuit and control method |
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| CN103095228A true CN103095228A (en) | 2013-05-08 |
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| CN2013100099690A Pending CN103095228A (en) | 2013-01-10 | 2013-01-10 | Intermodulation suppression amplifying circuit and control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440016A (en) * | 2013-08-07 | 2013-12-11 | 中国电子科技集团公司第十研究所 | Method for fast controlling output power of high-power-amplification emitter in large dynamic way |
| WO2015188300A1 (en) * | 2014-06-09 | 2015-12-17 | 华为技术有限公司 | Power amplification method and device for outphase modulation-based power amplifier |
| CN110212930A (en) * | 2019-05-29 | 2019-09-06 | 维沃移动通信有限公司 | Radio circuit and terminal |
| CN112398490A (en) * | 2019-08-14 | 2021-02-23 | 启碁科技股份有限公司 | Communication system and communication method |
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| EP0557929A1 (en) * | 1992-02-27 | 1993-09-01 | Japan Radio Co., Ltd | Control circuit for automatically controlled feed forward nonlinear distortion compensation amplifier |
| CN1154600A (en) * | 1995-11-16 | 1997-07-16 | 三星电子株式会社 | Linear power amplifying device and method |
| EP1684416A1 (en) * | 2005-01-19 | 2006-07-26 | Northrop Grumman Corporation | Feedforward spur cancellation approach using low IP amplifier |
| CN101388649A (en) * | 2008-10-13 | 2009-03-18 | 电子科技大学 | Low non-linear power amplifier |
| CN102075147A (en) * | 2010-12-31 | 2011-05-25 | 深圳市虹远通信有限责任公司 | Radio-frequency power amplifier method and feed-forward power amplifier |
| CN203233366U (en) * | 2013-01-10 | 2013-10-09 | 三维通信股份有限公司 | Intermodulation suppressing amplification circuit |
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2013
- 2013-01-10 CN CN2013100099690A patent/CN103095228A/en active Pending
Patent Citations (6)
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| EP0557929A1 (en) * | 1992-02-27 | 1993-09-01 | Japan Radio Co., Ltd | Control circuit for automatically controlled feed forward nonlinear distortion compensation amplifier |
| CN1154600A (en) * | 1995-11-16 | 1997-07-16 | 三星电子株式会社 | Linear power amplifying device and method |
| EP1684416A1 (en) * | 2005-01-19 | 2006-07-26 | Northrop Grumman Corporation | Feedforward spur cancellation approach using low IP amplifier |
| CN101388649A (en) * | 2008-10-13 | 2009-03-18 | 电子科技大学 | Low non-linear power amplifier |
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| HONGBO MA ET AL.: "An Improved Design of Feed-Forward Power Amplifier", 《PIERS ONLINE》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103440016A (en) * | 2013-08-07 | 2013-12-11 | 中国电子科技集团公司第十研究所 | Method for fast controlling output power of high-power-amplification emitter in large dynamic way |
| WO2015188300A1 (en) * | 2014-06-09 | 2015-12-17 | 华为技术有限公司 | Power amplification method and device for outphase modulation-based power amplifier |
| CN105474534A (en) * | 2014-06-09 | 2016-04-06 | 华为技术有限公司 | Power amplification method and device for outphase modulation-based power amplifier |
| CN105474534B (en) * | 2014-06-09 | 2018-11-16 | 华为技术有限公司 | A kind of power-magnifying method and equipment based on out-phase phase-modulation power amplifier |
| CN110212930A (en) * | 2019-05-29 | 2019-09-06 | 维沃移动通信有限公司 | Radio circuit and terminal |
| CN112398490A (en) * | 2019-08-14 | 2021-02-23 | 启碁科技股份有限公司 | Communication system and communication method |
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Application publication date: 20130508 |