CN209570689U - A kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system - Google Patents
A kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system Download PDFInfo
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- CN209570689U CN209570689U CN201920199068.5U CN201920199068U CN209570689U CN 209570689 U CN209570689 U CN 209570689U CN 201920199068 U CN201920199068 U CN 201920199068U CN 209570689 U CN209570689 U CN 209570689U
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Abstract
Present disclose provides a kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance systems.Wherein, magnetic resonance radio frequency power amplifier apparatus, including the first balun, first balun are connected by the first analog-digital converter with processor；Second balun, second balun are connected by the second analog-digital converter with processor；The processor is sequentially connected in series with third balun, digital analog converter, simulation up-converter module and radio-frequency power amplifier module；The radio-frequency power amplifier module is for being divided into two-way after amplifying received signal, wherein launch all the way, another way successively obtains feedback signal after coupled module and analog down resume module and is input in processor.
Description
Technical field
The disclosure belongs to magnetic resonance arts more particularly to a kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system
System.
Background technique
Only there is provided background technical informations relevant to the disclosure for the statement of this part, it is not necessary to so constitute first skill
Art.
In magnetic resonance system, radio-frequency power amplifier is needed to be amplified to the radio-frequency pulse that resonance spectrometer emits several
Ten arrive several hectowatts, transmitting coil are output to, with excitation experiment sample.Therefore radio-frequency power amplifier be can not in magnetic resonance system
The a part lacked.Inventors have found that structure is complicated and working efficiency is lower for radio-frequency power amplifier at present.
Utility model content
To solve the above-mentioned problems, the first aspect of the disclosure provides a kind of magnetic resonance radio frequency power amplifier apparatus,
It has the advantages that structure is simple and work efficiency is high.
A kind of technical solution of magnetic resonance radio frequency power amplifier apparatus of the first aspect of the disclosure are as follows:
A kind of magnetic resonance radio frequency power amplifier apparatus of the disclosure, comprising:
First balun, first balun are connected by the first analog-digital converter with processor；
Second balun, second balun are connected by the second analog-digital converter with processor；
The processor and third balun, digital analog converter, simulation up-converter module and radio-frequency power amplifier module according to
Secondary series connection；
The radio-frequency power amplifier module is for being divided into two-way after amplifying received signal, wherein launching all the way
It goes, another way successively obtains feedback signal after coupled module and analog down resume module and is input in processor.
Further, the simulation up-converter module includes: that the first numerically-controlled oscillator, bandpass filter and first are mixed
Frequency device；First numerically-controlled oscillator completes frequency for generating sine and cosine two-way orthogonal signalling, and by the first frequency mixer jointly
The resettlement of spectrum；Bandpass filter is used to filter out the redundant frequency spectrum generated when up-conversion mixing.
Further, the analog down module includes: the second numerically-controlled oscillator, digital Finite filter and
Two frequency mixers；Second numerically-controlled oscillator is for generating sine and cosine two-way orthogonal signalling, and it is jointly complete to pass through the second frequency mixer
At the resettlement of frequency spectrum；Digital Finite filter is used to filter out the redundant frequency spectrum generated when down coversion mixing.
Further, the coupling module includes: power divider and signal attenuator, the power divider be used for from
A part of radiofrequency signal is extracted in radio-frequency power amplifier, this portion radio frequency signal successively passes through signal attenuator and simulation again
Down conversion module processing, obtains feedback signal.
To solve the above-mentioned problems, the second aspect of the disclosure provides a kind of magnetic resonance system.
A kind of technical solution of magnetic resonance system of the second aspect of the disclosure are as follows:
A kind of magnetic resonance system of the disclosure, comprising:
Magnetic resonance signal generating device is configured as generating magnetic resonance pulse signal；
Magnetic resonance radio frequency power amplifier apparatus described above exports after being used to receive the amplification of magnetic resonance pulse signal
To magnetic resonance signal emitter；
The magnetic resonance signal emitter is used to emit the magnetic resonance signal of amplification.
The beneficial effect of the disclosure is:
The first balun in the magnetic resonance radio frequency power amplifier apparatus of the disclosure receives feed-forward signal and through the first modulus
Converter is sent to processor, and the second balun receives feedback signal and is sent to processor through the second analog-digital converter；Processor
It is sequentially connected in series with third balun, digital analog converter, simulation up-converter module and radio-frequency power amplifier module；Radio-frequency power
Amplifier module is divided into two-way after amplifying received signal, wherein launch all the way, another way successively coupled module and
Feedback signal is obtained after analog down resume module and is input in processor, and structure is simple and work efficiency is high.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is a kind of magnetic resonance radio frequency power amplifier apparatus structural schematic diagram that the embodiment of the present disclosure provides.
Fig. 2 is a kind of magnetic resonance system structural schematic diagram that the embodiment of the present disclosure provides.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to be further explained to disclosure offer.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As shown in Figure 1, a kind of magnetic resonance radio frequency power amplifier apparatus of the present embodiment, comprising:
First balun, first balun are connected by the first analog-digital converter with processor；
Second balun, second balun are connected by the second analog-digital converter with processor；
The processor and third balun, digital analog converter, simulation up-converter module and radio-frequency power amplifier module according to
Secondary series connection；
The radio-frequency power amplifier module is for being divided into two-way after amplifying received signal, wherein launching all the way
It goes, another way successively obtains feedback signal after coupled module and analog down resume module and is input in processor.
Wherein, balun: balun is responsible for mutually converting between high frequency single-ended signal and differential signal.
The essence of balun is line transformer, according to the input impedance of antenna, designs winding, it can be achieved that n^2:m^2
Impedance transformation.It is common to have 1:4,1:9 etc..Therefore, the structure of balun is also existing structure.
Analog-digital converter: having Differential Input mouth, is digital signal by analog-signal transitions.The concrete model of analog-digital converter
It can be specifically chosen according to the actual situation.
Processor: DSP or fpga chip can be used to realize.
Digital analog converter: converting digital signals into analog signal, exports analog signal.
Simulation up-converter module: radio frequency band will be adjusted in the intermediate-freuqncy signal of digital analog converter output.
Radio-frequency power amplifier module: the signal of up-conversion is after radio-frequency power amplifier amplifies, using radio frequency line
Circle is launched.
Coupling module: it is equivalent to signal attenuator.
Analog down module: by radiofrequency signal frequency reducing.
Specifically, the simulation up-converter module includes: the first numerically-controlled oscillator, bandpass filter and the first mixing
Device；First numerically-controlled oscillator completes frequency spectrum for generating sine and cosine two-way orthogonal signalling, and by the first frequency mixer jointly
Resettlement；Bandpass filter is used to filter out the redundant frequency spectrum generated when up-conversion mixing.
The analog down module includes: the second numerically-controlled oscillator, digital Finite filter and the second frequency mixer；
Second numerically-controlled oscillator completes removing for frequency spectrum for generating sine and cosine two-way orthogonal signalling, and by the second frequency mixer jointly
It moves；Digital Finite filter is used to filter out the redundant frequency spectrum generated when down coversion mixing.
Wherein, Kang Shi oscillator XY-KS-II can be used in the first numerically-controlled oscillator and the second numerically-controlled oscillator
It realizes.
RF frequency mixer QFN-16 can be used to realize in first frequency mixer and the second frequency mixer.
Bandpass filter can be specifically chosen respective model according to its filtering requirements.
Dsp chip can be used to realize, such as TMS320 family chip in digital Finite filter.
The coupling module includes: power divider and signal attenuator, and the power divider is used for from radio-frequency power
A part of radiofrequency signal is extracted in amplifier, this portion radio frequency signal successively passes through signal attenuator and analog down mould again
Block processing, obtains feedback signal.
The structure of power divider is existing structure, and model can be required according to its specific performance to be specifically chosen.
The structure of signal attenuator is existing structure, and model can be required according to its specific performance to be specifically chosen.
Any model radio-frequency power amplifier of U.S. AMCOM production can be selected to realize in radio-frequency power amplifier.
Fig. 2 is a kind of magnetic resonance system structural schematic diagram that the embodiment of the present disclosure provides.
As shown in Fig. 2, a kind of magnetic resonance system of the present embodiment, comprising:
Magnetic resonance signal generating device is used to generate magnetic resonance pulse signal；
Magnetic resonance radio frequency power amplifier apparatus as shown in Figure 1 is used to receive defeated after magnetic resonance pulse signal amplifies
Out to magnetic resonance signal emitter；
The magnetic resonance signal emitter is used to emit the magnetic resonance signal of amplification.
Specifically, resonance spectrometer can be used to realize in magnetic resonance signal generating device.
The radio-frequency coil of magnetic resonance system can be used to realize in magnetic resonance signal emitter.
Although above-mentioned be described in conjunction with specific embodiment of the attached drawing to the disclosure, model not is protected to the disclosure
The limitation enclosed, those skilled in the art should understand that, on the basis of the technical solution of the disclosure, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within the protection scope of the disclosure.
Claims (5)
1. a kind of magnetic resonance radio frequency power amplifier apparatus characterized by comprising
First balun, first balun are connected by the first analog-digital converter with processor；
Second balun, second balun are connected by the second analog-digital converter with processor；
The processor is successively gone here and there with third balun, digital analog converter, simulation up-converter module and radio-frequency power amplifier module
Connection connection；
The radio-frequency power amplifier module is for being divided into two-way after amplifying received signal, wherein launching all the way, separately
Feedback signal successively is obtained after coupled module and analog down resume module all the way and is input in processor.
2. a kind of magnetic resonance radio frequency power amplifier apparatus as described in claim 1, which is characterized in that the simulation up-conversion
Module includes: the first numerically-controlled oscillator, bandpass filter and the first frequency mixer；First numerically-controlled oscillator is for generating
Sine and cosine two-way orthogonal signalling, and pass through the resettlement that the first frequency mixer completes frequency spectrum jointly；Bandpass filter is for filtering out change
The redundant frequency spectrum that frequency generates when being mixed.
3. a kind of magnetic resonance radio frequency power amplifier apparatus as described in claim 1, which is characterized in that the analog down
Module includes: the second numerically-controlled oscillator, digital Finite filter and the second frequency mixer；Second numerically-controlled oscillator is used for
Sine and cosine two-way orthogonal signalling are generated, and complete the resettlement of frequency spectrum jointly by the second frequency mixer；Digital Finite filter is used for
Filter out the redundant frequency spectrum generated when down coversion mixing.
4. a kind of magnetic resonance radio frequency power amplifier apparatus as described in claim 1, which is characterized in that the coupling module packet
Include: power divider and signal attenuator, the power divider are penetrated for extracting a part from radio-frequency power amplifier
Frequency signal, this portion radio frequency signal successively pass through signal attenuator and analog down resume module again, obtain feedback signal.
5. a kind of magnetic resonance system characterized by comprising
Magnetic resonance signal generating device is used to generate magnetic resonance pulse signal；
Such as magnetic resonance radio frequency power amplifier apparatus of any of claims 1-4, it is used to receive magnetic resonance pulse
It exports after signal amplification to magnetic resonance signal emitter；
The magnetic resonance signal emitter is used to emit the magnetic resonance signal of amplification.
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| CN201920199068.5U CN209570689U (en) | 2019-02-12 | 2019-02-12 | A kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system |
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| CN201920199068.5U CN209570689U (en) | 2019-02-12 | 2019-02-12 | A kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683115A (en) * | 2019-02-12 | 2019-04-26 | 泰山医学院 | A kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109683115A (en) * | 2019-02-12 | 2019-04-26 | 泰山医学院 | A kind of magnetic resonance radio frequency power amplifier apparatus and magnetic resonance system |
| CN109683115B (en) * | 2019-02-12 | 2024-05-03 | 泰山医学院 | Magnetic resonance radio frequency power amplifier device and magnetic resonance system |
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