CN112187296A - Frequency synthesis mobile-based Ka frequency band transmitter and implementation method thereof - Google Patents
Frequency synthesis mobile-based Ka frequency band transmitter and implementation method thereof Download PDFInfo
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- CN112187296A CN112187296A CN202010932442.5A CN202010932442A CN112187296A CN 112187296 A CN112187296 A CN 112187296A CN 202010932442 A CN202010932442 A CN 202010932442A CN 112187296 A CN112187296 A CN 112187296A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a frequency synthesis mobile-based Ka frequency band transmitter and an implementation method thereof, wherein the Ka frequency band transmitter comprises a secondary frequency conversion module, a frequency conversion module and a frequency conversion module, wherein the secondary frequency conversion module is used for performing frequency conversion processing on an input first signal; the microwave driving module is used for amplifying and filtering the second signal; the final-stage space power synthesis module is used for performing power amplification on the third signal in a mode of combining space power synthesis and waveguide power division synthesis; and the coupling detection module is used for coupling and detecting the fourth signal. According to the invention, a frequency conversion link in the traditional method is added with a frequency synthesis mobile-based secondary frequency conversion technology, and a power synthesis link uses a combined technology of space power synthesis and waveguide power division synthesis, so that the technical effect that the transmitter can be suitable for the Ka frequency band full frequency band without customization is realized, and meanwhile, the power synthesis efficiency of the transmitter is effectively improved, so that the Ka frequency band transmitter can be suitable for more application scenes.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a Ka frequency band transmitter based on frequency synthesis mobility and an implementation method thereof.
Background
With the rapid development of high-throughput satellite mobile communication technology in the satellite communication field in recent years, the Ka band has become one of the main bands for future high-throughput communication applications through wide development and utilization. However, since the whole frequency band of Ka frequency band is wide, the frequency band occupied by the application field is only a part of Ka frequency band, and under the condition that the intermediate frequency input is the same, because the output frequency bands of different millimeter waves in the application approaches are different, the Ka frequency band and the Ka frequency band are often incompatible to each other.
For the existing Ka band transmitter, the traditional method is to input the intermediate frequency in a certain range to correspond to the millimeter wave output in the fixed range by fixing a local oscillator frequency, the output corresponding frequency band is narrow, the whole Ka band cannot be covered, and meanwhile, because the local oscillator frequency is fixed, the millimeter wave output frequency cannot be changed, the customized design is required according to the requirements of application scenarios; meanwhile, most of the power amplifiers in practical application at present adopt a microstrip or waveguide planar synthesis mode to carry out power synthesis, and are influenced by the increase of insertion loss of binary tree multistage synthesis, the output power is usually about 20W, and the output power is smaller; the above disadvantages greatly limit the application scenarios and performance of the Ka band transmitter, and therefore how to improve the above disadvantages is a technical problem which is urgently needed to be solved at present.
Disclosure of Invention
In order to solve at least one of the technical problems in the prior art, an object of the present invention is to provide a frequency synthesizer shift-based Ka band transmitter and an implementation method thereof.
According to a first aspect of the embodiments of the present invention, a frequency synthesis shift-based Ka band transmitter includes:
the secondary frequency conversion module is used for carrying out frequency conversion processing on the input first signal and outputting a second signal;
the microwave driving module is connected with the secondary frequency conversion module and used for amplifying and filtering the second signal and outputting a third signal;
the final-stage space power synthesis module is connected with the microwave driving module and used for performing power amplification on the third signal in a mode of combining space power synthesis and waveguide power division synthesis and outputting a fourth signal;
and the coupling detection module is connected with the final-stage space power synthesis module and is used for coupling and detecting the fourth signal.
Further, the secondary frequency conversion module includes:
the intermediate frequency amplification unit is used for performing intermediate frequency amplification and filtering on the first signal and outputting a first amplified signal;
the fixed frequency comprehensive local oscillator unit is connected with the intermediate frequency amplification unit and is used for carrying out frequency mixing on the first amplified signal and outputting a first frequency mixing signal;
the high-frequency amplification unit is connected with the fixed frequency comprehensive local oscillator unit and is used for performing high-frequency amplification and filtering on the first mixing signal and outputting a second amplified signal;
and the frequency-shifting comprehensive local oscillator unit is connected with the high-frequency amplification unit and is used for mixing the second amplified signal and outputting the second signal.
Further, the final stage spatial power combining module includes:
the one-to-four power amplifier is used for distributing and inputting the third signal to four channels to carry out power amplification respectively;
the spatial power synthesis unit is connected with the one-in-four path amplifier and used for performing power amplification on the third signal in a spatial power synthesis mode and outputting a spatial power amplification signal;
and the four-in-one synthesizer is connected with the spatial power synthesis unit and is used for synthesizing the spatial power amplification signals in a waveguide power division synthesis mode and outputting the fourth signal.
Further, the space power synthesis unit adopts a gallium nitride chip.
Further, still include:
a power supply unit for supplying power to the transmitter;
and the monitoring unit is connected with the power supply unit and used for carrying out function setting on the transmitter, monitoring the running state of the transmitter and reporting running data.
According to a second aspect of embodiments of the invention, a method comprises:
acquiring a first signal, performing frequency conversion processing on the first signal, and outputting a second signal;
amplifying and filtering the second signal to output a third signal;
performing power amplification on the third signal by combining a space power synthesis and waveguide power division synthesis mode, and outputting a fourth signal;
coupling and detecting the fourth signal.
Further, the step of acquiring the first signal, performing frequency conversion processing on the first signal, and outputting a second signal includes:
performing intermediate frequency amplification and filtering on the first signal, and outputting a first amplified signal;
mixing the first amplified signal to output a first mixed signal;
performing high-frequency amplification and filtering on the first mixing signal, and outputting a second amplified signal;
and mixing the second amplified signal to output the second signal.
Further, the step of performing power amplification on the third signal by combining spatial power synthesis and waveguide power division synthesis, and outputting a fourth signal includes:
distributing and inputting the third signal to four channels to carry out power amplification respectively;
performing power amplification on the third signal in a space power synthesis mode, and outputting a space power amplification signal;
and synthesizing the space power amplification signals in a waveguide power division synthesis mode, and outputting the fourth signal.
The invention has the beneficial effects that: the frequency conversion link in the traditional method is added with a frequency synthesis movable-based secondary frequency conversion technology, and a power synthesis link uses a combined technology of space power synthesis and waveguide power division synthesis, so that the technical effect that the transmitter can be suitable for the Ka frequency band full frequency band without customization is realized, and meanwhile, the power synthesis efficiency of the transmitter is effectively improved, so that the Ka frequency band transmitter can be suitable for more application scenes.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description is made on the drawings of the embodiments of the present invention or the related technical solutions in the prior art, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solutions of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a system connection diagram provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of example A provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of example B provided by an embodiment of the present invention;
fig. 4 is a flow chart of steps provided by an embodiment of the present invention.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention.
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and "fourth," etc. in the description and claims of the invention and in the accompanying drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, a system connection diagram provided according to an embodiment of the present invention is shown, including:
the secondary frequency conversion module 100 is configured to perform frequency conversion processing on an input first signal and output a second signal, where it needs to be noted that the first signal is generally an intermediate frequency signal; wherein, secondary frequency conversion module 100 still includes: an intermediate frequency amplifying unit 101, configured to perform intermediate frequency amplification and filtering on the first signal, and output a first amplified signal; the fixed frequency synthesis local oscillator unit 102 is connected with the intermediate frequency amplification unit 101, and is used for mixing the first amplified signal and outputting a first mixed frequency signal; the high-frequency amplification unit 103 is connected with the fixed-frequency comprehensive local oscillator unit 102 and is used for performing high-frequency amplification and filtering on the first mixing signal and outputting a second amplified signal; and the frequency-shift comprehensive local oscillator unit 104 is connected with the high-frequency amplification unit 103 and is used for mixing the second amplified signal and outputting the second signal.
And the microwave driving module 200 is connected to the secondary frequency conversion module 100, and configured to amplify and filter the second signal and output a third signal.
The final-stage spatial power synthesis module 300 is connected with the microwave driving module 200, and is configured to perform power amplification on the third signal by combining spatial power synthesis and waveguide power division synthesis, and output a fourth signal; wherein, the final stage spatial power combining module 300 further includes: a one-to-four power amplifier 301, configured to distribute and input the third signal to four channels for power amplification respectively; a spatial power synthesis unit 302, configured to perform power amplification on the third signal in a spatial power synthesis manner, and output a spatial power amplified signal; and a four-in-one synthesizer 303 connected to the spatial power synthesizing unit 302, configured to synthesize the spatial power amplified signals in a waveguide power division synthesizing manner, and output a fourth signal.
It should be noted that, in some embodiments, there are generally 4 spatial power combining units 302, which are respectively connected to the one-in-four power amplifiers 301, and all adopt a gallium nitride chip design, and mainly benefit from the characteristics of gallium nitride itself, such as high power, high stability, and wider bandwidth; each spatial power combining unit 302 can output 80W of power, and then the power is combined by the four-in-one combiner 303, and power larger than 200W can be output, thereby ensuring that the total power of the transmitter is larger than 200W after the transmitter passes through the coupling component.
And the coupling detection module 400 is connected with the final stage space power combining module 300 and is used for coupling and detecting the fourth signal.
It should be noted that the frequency synthesis-based mobile Ka band transmitter further includes a power supply unit for supplying power to the transmitter; and the monitoring unit is connected with the power supply unit and used for carrying out function setting on the transmitter, monitoring the running state of the transmitter and reporting running data.
Referring to fig. 2, a schematic diagram of an embodiment a according to an embodiment of the present invention is shown, where the embodiment a shows a principle of a frequency-shifting heddle, and it should be noted that the frequency-shifting heddle can be understood as a bandwidth application covering a wider output, and a local oscillation frequency adopted when mixing a second amplified signal can be changed within a certain range, so that a frequency after mixing can also be changed within a certain range; the local oscillation frequency output by the frequency-shift comprehensive local oscillation unit 104 is mainly controlled by a program stored in the MCU; after the upper computer sets corresponding frequency according to actual requirements, the MCU configures the phase discriminator; after configuration, the voltage-controlled oscillator outputs an initial local oscillation frequency, performs phase discrimination with a reference input signal after frequency division, outputs CP current, converts the CP current into a voltage-controlled oscillator after loop filtering, and outputs the local oscillation frequency until locking; setting the output range of the local oscillation frequency to be f 1-f 2 and setting the step to be 10MHz through an upper computer; after the voltage-controlled oscillator outputs the local oscillation frequency, the local oscillation frequency is subjected to filtering, frequency multiplication and secondary filtering and then subjected to secondary frequency mixing with MIX2, namely, the local oscillation frequency is subjected to frequency mixing with a second amplified signal; outputting a Ka frequency band, and covering a millimeter wave frequency band signal of 27.5-31GHz after frequency synthesis movement; the frequency is stepped to 20 MHz; the mixing formula is:
LO+IF＝RF,
where IF represents the fixed bandwidth frequency, LO represents the variable frequencies f 1-f 2, and RF represents the movable frequency that follows the LO.
By the method, under the condition of fixed medium frequency bandwidth, a wider millimeter wave range can be covered by the mixing link, and the requirements of different application scenes are met.
Referring to fig. 3, a schematic diagram of embodiment B according to an embodiment of the present invention is shown, where embodiment B shows an overall process, which specifically includes:
inputting a first signal to an intermediate frequency amplification unit 101, where the intermediate frequency amplification unit 101 is actually an intermediate frequency amplification circuit, performing intermediate frequency amplification and filtering on the first signal through the intermediate frequency amplification unit 101, and outputting the first amplified signal to a fixed frequency integrated local oscillator unit 102; the fixed frequency synthesis local oscillator unit 102 performs first frequency mixing with the first amplified signal by using a fixed local oscillator frequency, and then outputs the first frequency mixed signal to the high frequency amplification unit 103, where the high frequency amplification unit 103 is actually a high frequency amplification circuit; performing high-frequency amplification and filtering on the first mixing signal through the high-frequency amplification unit 103, and further outputting a second amplified signal to the movable frequency synthesis oscillator unit 104, where for the principle of change of the local oscillator frequency in the movable frequency synthesis oscillator unit 104, refer to the description about fig. 2; further, the second signal is output to the microwave driving module 200, and the second signal is amplified and filtered by the microwave driving module 200; further, a third signal is output to the final-stage spatial power combining module 300, and the third signal is combined in a spatial power combining and waveguide power dividing combining manner in the final-stage spatial power combining module 300; further, the fourth signal is output to the coupling detection module 400, and the fourth signal is coupled and detected; and finally outputting the Ka frequency band signal according to the actual application scene requirement.
Referring to fig. 4, a flowchart of steps provided according to an embodiment of the present invention is shown, including steps S100 to S400:
s100, acquiring a first signal, carrying out frequency conversion processing on the first signal, and outputting a second signal;
optionally, S100 may be implemented by:
s101, performing intermediate frequency amplification and filtering on the first signal, and outputting a first amplified signal;
s102, mixing the first amplified signal and outputting a first mixed signal;
s103, performing high-frequency amplification and filtering on the first mixing signal, and outputting a second amplified signal;
and S104, mixing the second amplified signal and outputting the second signal.
S200, amplifying and filtering the second signal, and outputting a third signal;
s300, performing power amplification on the third signal by combining a space power synthesis and waveguide power division synthesis mode, and outputting a fourth signal;
optionally, step S300 may be implemented by:
s301, distributing and inputting the third signal to four channels to perform power amplification respectively;
s302, performing power amplification on the third signal in a space power synthesis mode, and outputting a space power amplification signal;
and S303, synthesizing the spatial power amplification signals in a waveguide power division synthesis mode, and outputting the fourth signal.
And S400, coupling and detecting the fourth signal.
The contents in the system embodiment shown in fig. 1 are all applicable to the method embodiment, the functions implemented by the method embodiment are the same as those of the system embodiment shown in fig. 1, and the beneficial effects achieved by the method embodiment are also the same as those achieved by the system embodiment shown in fig. 1.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (8)
1. A frequency synthesizer shift based Ka band transmitter, comprising:
the secondary frequency conversion module is used for carrying out frequency conversion processing on the input first signal and outputting a second signal;
the microwave driving module is connected with the secondary frequency conversion module and used for amplifying and filtering the second signal and outputting a third signal;
the final-stage space power synthesis module is connected with the microwave driving module and used for performing power amplification on the third signal in a mode of combining space power synthesis and waveguide power division synthesis and outputting a fourth signal;
and the coupling detection module is connected with the final-stage space power synthesis module and is used for coupling and detecting the fourth signal.
2. The frequency synthesizer based transportable Ka band transmitter of claim 1, wherein the double frequency conversion module comprises:
the intermediate frequency amplification unit is used for performing intermediate frequency amplification and filtering on the first signal and outputting a first amplified signal;
the fixed frequency comprehensive local oscillator unit is connected with the intermediate frequency amplification unit and is used for carrying out frequency mixing on the first amplified signal and outputting a first frequency mixing signal;
the high-frequency amplification unit is connected with the fixed frequency comprehensive local oscillator unit and is used for performing high-frequency amplification and filtering on the first mixing signal and outputting a second amplified signal;
and the frequency-shifting comprehensive local oscillator unit is connected with the high-frequency amplification unit and is used for mixing the second amplified signal and outputting the second signal.
3. The frequency synthesizer based transportable Ka band transmitter of claim 1, wherein said final stage spatial power combining module comprises:
the one-to-four power amplifier is used for distributing and inputting the third signal to four channels to carry out power amplification respectively;
the spatial power synthesis unit is connected with the one-in-four path amplifier and used for performing power amplification on the third signal in a spatial power synthesis mode and outputting a spatial power amplification signal;
and the four-in-one synthesizer is connected with the spatial power synthesis unit and is used for synthesizing the spatial power amplification signals in a waveguide power division synthesis mode and outputting the fourth signal.
4. The frequency synthesizer based transportable Ka band transmitter of claim 3, wherein the spatial power combiner unit is implemented with gan chip.
5. The frequency synthesizer based transportable Ka band transmitter of claim 1, further comprising:
a power supply unit for supplying power to the transmitter;
and the monitoring unit is connected with the power supply unit and used for carrying out function setting on the transmitter, monitoring the running state of the transmitter and reporting running data.
6. A method, comprising:
acquiring a first signal, performing frequency conversion processing on the first signal, and outputting a second signal;
amplifying and filtering the second signal to output a third signal;
performing power amplification on the third signal by combining a space power synthesis and waveguide power division synthesis mode, and outputting a fourth signal;
coupling and detecting the fourth signal.
7. The method of claim 6, wherein the step of obtaining a first signal, performing frequency conversion on the first signal, and outputting a second signal comprises:
performing intermediate frequency amplification and filtering on the first signal, and outputting a first amplified signal;
mixing the first amplified signal to output a first mixed signal;
performing high-frequency amplification and filtering on the first mixing signal, and outputting a second amplified signal;
and mixing the second amplified signal to output the second signal.
8. The method of claim 6, wherein the step of outputting a fourth signal by power amplifying the third signal by combining spatial power combining and waveguide power dividing comprises:
distributing and inputting the third signal to four channels to carry out power amplification respectively;
performing power amplification on the third signal in a space power synthesis mode, and outputting a space power amplification signal;
and synthesizing the space power amplification signals in a waveguide power division synthesis mode, and outputting the fourth signal.
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| CN109286373A (en) * | 2018-09-25 | 2019-01-29 | 安徽华东光电技术研究所有限公司 | Ku frequency range low-converter |
| CN110176936A (en) * | 2019-05-30 | 2019-08-27 | 中国电子科技集团公司第三十六研究所 | A kind of Ka frequency range broadband reception circuit |
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2020
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201774528U (en) * | 2010-01-22 | 2011-03-23 | 南京誉葆科技有限公司 | Integrated Ku-waveband comprehensive digital coding instruction transmitting and receiving device |
| CN105356928A (en) * | 2015-09-28 | 2016-02-24 | 四川九洲电器集团有限责任公司 | Satellite communication frequency conversion terminal equipment of Ku band |
| CN106253855A (en) * | 2016-09-26 | 2016-12-21 | 华讯方舟科技有限公司 | Down-conversion device |
| CN109286373A (en) * | 2018-09-25 | 2019-01-29 | 安徽华东光电技术研究所有限公司 | Ku frequency range low-converter |
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