CN109560854A - A kind of one-board feed element applied to micro-nano satellite - Google Patents
A kind of one-board feed element applied to micro-nano satellite Download PDFInfo
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- CN109560854A CN109560854A CN201811209404.6A CN201811209404A CN109560854A CN 109560854 A CN109560854 A CN 109560854A CN 201811209404 A CN201811209404 A CN 201811209404A CN 109560854 A CN109560854 A CN 109560854A
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- local oscillator
- frequency
- signal
- locking
- locking phase
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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
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18515—Transmission equipment in satellites or space-based relays
Abstract
The present invention provides a kind of one-board feed element applied to micro-nano satellite, including down coversion channel, digital baseband, up-conversion passage and local oscillator；The down coversion channel includes combiner, radio-frequency front-end, frequency mixer, puts in conversion gain controller and two；The digital baseband includes power supply processing, analog-digital converter, FPGA and low-pass filter；The up-conversion passage includes modulator, filter, power amplifier and isolator；The local oscillator includes crystal oscillator, the first locking phase local oscillator, the second locking phase local oscillator and third locking phase local oscillator.The present invention is using one piece of CPCI standard 3U plate card type design, and without manual fly line, process flow is simple, the lead time is short；It is designed using the one-board of Highgrade integration, reduces volumetric work expendable weight amount；Using digital servo-control local oscillator and software and radio technique, configure more flexible；The multiple functions such as satellite remote control telemetering sum number biography are integrated with, work improves the utilization rate of frequency resource in C frequency range, function simultaneously entirely.
Description
Technical field
The present invention relates to Satellite TT, number biography field, in particular to a kind of one-board applied to micro-nano satellite feeds single
Member.
Background technique
It is domestic micro- with continuous growth of the industries such as maritime affairs, electric power, forestry, low rail mobile communication to satellite application demand
The application technology of Nano satellite is grown rapidly.Micro-nano satellite is with strong points because its lead time is short, is adapted for carrying out specific urgent
Business, the quick space demonstration and verification of new technology and people's commercialization space flight.With the continuous proposition of satellite constellation concept, Satellite Networking skill
Trend of Industrialization will be presented in the development of art, micro-nano satellite.But simultaneously compare conventional satellite, micro-nano satellite to volume, power consumption,
The requirement of weight, cost, frequency resource etc. is more harsh.
Satellite uplink remote control reception demodulation downlink telemetry tune is generally completed by S frequency range TT&C Transponder in traditional large satellite
Emission function processed, by X band number pass complete load data processing and under pass, wherein answering machine sum number biography is all with independent list
Machine design, every single machine is at least at several kilograms or more, and power consumption is at tens watts or more, it is difficult to meet the use demand of micro-nano satellite,
Conventional satellite uses aerospace grade device simultaneously, and development cost is high, and lead time length is not suitable for micro-nano satellite yet.
According to the demand of micro-nano satellite, the feed element designed in the present invention works in C frequency range, only with one piece of CPCI standard
3U board is integrated with the function of satellite remote control telemetering sum number biography, instead of in general large satellite originally by TT&C Transponder, remote control
More standalones, the weight power consumptions etc. such as remote unit, number biography all reduce an order of magnitude or more.Army's temperature grade device is used simultaneously
Part uses after adding tight examination according to I grades of drop volumes, guarantees the reliability of product while reducing development cost.
Summary of the invention
The purpose of the present invention is to provide a kind of one-board feed elements applied to micro-nano satellite, to meet micro-nano satellite
It is small in size, low in energy consumption, light-weight, the period is short, configuration is flexible, function collection medium request.
In order to solve the above-mentioned technical problem, the technical scheme is that providing a kind of veneer applied to micro-nano satellite
Formula feed element, including down coversion channel, digital baseband, up-conversion passage and local oscillator；The down coversion channel include combiner,
Radio-frequency front-end, frequency mixer are put in conversion gain controller and two；The digital baseband includes power supply processing, Analog-digital Converter
Device, FPGA and low-pass filter；The up-conversion passage includes modulator, filter, power amplifier and isolator；Described
Vibration includes crystal oscillator, the first locking phase local oscillator, the second locking phase local oscillator and third locking phase local oscillator；
The combiner is used to the synthesis of day antenna and over the ground antenna received upstream radio-frequency signal send out satellite afterwards all the way
It is sent to the radio-frequency front-end, the signal received is filtered, is sent to after high-gain low-noise amplification by the radio-frequency front-end
Frequency mixer, the frequency mixer are mixed concurrently under carrying out the radiofrequency signal received with the signal that the first locking phase local oscillator exports
It send to conversion gain controller, the conversion gain controller amplifies the signal received and defeated with the second locking phase local oscillator
Signal out exports intermediate-freuqncy signal to the digital baseband after carrying out down coversion and automatic growth control；
The primary power source that the power supply processing provides whole star is each module for power supply of feed element, institute after carrying out steady pressure treatment
It states after the intermediate-freuqncy signal that the down coversion channel exports is carried out AD sampling by analog-digital converter and is sent to FPGA, the FPGA
Uplink remote control or data block will be exported after AD sampled signal frequency locking locking phase, bit synchronization, frame synchronization to whole star integrated electronics, simultaneously will
Load data and downlink telemetry data export after group is detectd, scrambled, encoding to low-pass filter；The low-pass filter pair
The downgoing baseband signal of FPGA output exports after carrying out low-pass filtering treatment to up-conversion passage；
The downgoing baseband signal that digital baseband exports is modulated to the output of third locking phase local oscillator by the modulator
In row carrier frequency, the modulated signal that the filter exports modulator is filtered, and filters out harmonic wave and clutter, described
Power amplifier to downlink signal carry out high gain and high efficiency gain amplify, the isolator for guarantee power amplifier with
Impedance matching between transmitting antenna；
The crystal oscillator is the first locking phase local oscillator, the second locking phase local oscillator, third locking phase local oscillator and FPGA provide reference clock, institute
Local oscillation signal is generated to frequency mixer, second locking phase after stating the clock signal phase locking frequency multiplying that the first locking phase local oscillator provides crystal oscillator
Local oscillation signal is generated after the clock signal phase locking frequency multiplying that local oscillator provides crystal oscillator to conversion gain controller, the third locking phase sheet
Local oscillation signal is generated after the clock signal phase locking frequency multiplying that vibration provides crystal oscillator to modulator.
Further, the frequency mixer uses double balanced mixer.
Further, the analog-digital converter uses 12 A/D chips.
Further, the crystal oscillator uses 20MHz temperature compensating crystal oscillator.
Further, the modulator is directly by modulates baseband signals on downlink 4000MHz carrier wave, the injustice of modulator
Weighing apparatus degree is 0.11dB amplitude, and phase unbalance degree is 0.13 degree.
Further, the first locking phase local oscillator, the second locking phase local oscillator and third locking phase local oscillator are equal are as follows: reference frequency
20MHz, output frequency (20 ÷ R × N) MHz generate 5600MHz after phase locking frequency multiplying wherein the first locking phase local oscillator R=1, N=280
Local oscillation signal is to frequency mixer；Second locking phase local oscillator R=20, N=330 generates 330MHz local oscillation signal after phase locking frequency multiplying to frequency conversion
Gain controller；Third locking phase local oscillator R=1, N=200 generates 4000MHz local oscillation signal after phase locking frequency multiplying to modulator.
One-board feed element provided by the invention applied to micro-nano satellite is set using one piece of CPCI standard 3U plate card type
Meter, without manual fly line, process flow is simple, the lead time is short；It is designed using the one-board of Highgrade integration, reduces volume
Power consumption weight；Using digital servo-control local oscillator and software and radio technique, configure more flexible；It is integrated with satellite remote control telemetering sum number
The multiple functions such as biography, work improve the utilization rate of frequency resource in C frequency range, function simultaneously entirely；Added sternly using army's temperature grade device
It is used after examination according to I grades of drop volumes, guarantees the reliability of product while reducing development cost.
Detailed description of the invention
Invention is described further with reference to the accompanying drawing:
Fig. 1 is that CPCI board and each function divide chamber schematic diagram in the present invention；
Fig. 2 is the principle of the present invention block diagram；
Fig. 3 is the functional block diagram of locking phase local oscillator in the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments to the one-board feed element proposed by the present invention applied to micro-nano satellite
It is described in further detail.According to following explanation and claims, advantages and features of the invention will be become apparent from.It should be noted
It is that attached drawing is all made of very simplified form and using non-accurate ratio, only to facilitate, lucidly aid in illustrating this hair
The purpose of bright embodiment.
Core of the invention thought is that the one-board feed element provided by the invention applied to micro-nano satellite uses one
The design of block CPCI standard 3U plate card type, without manual fly line, process flow is simple, the lead time is short；Using Highgrade integration
One-board design, reduces volumetric work expendable weight amount；Using digital servo-control local oscillator and software and radio technique, configure more flexible；
The multiple functions such as satellite remote control telemetering sum number biography are integrated with, work improves the utilization of frequency resource in C frequency range, function simultaneously entirely
Rate；Added using army's temperature grade device and used after sternly examining according to I grades of drop volumes, guarantees the reliable of product while reducing development cost
Property.
A kind of one-board feed element applied to micro-nano satellite, as shown in Figure 1, being set using CPCI standard 3U plate card type
Meter carries out a point chamber shielding processing to each funtion part with structure, guarantees to also ensure micro-nano while micro-nano satellite mechanical requirements
The higher EMC index of satellite.As shown in Fig. 2, mainly including down coversion channel part, digital baseband part, up-conversion passage portion
Divide, locking phase local oscillator part.
System works in C frequency range, upstream frequency 6000MHz, information rate 64Kbps, downlink 4000MHz, information rate
For 2Mbps, output power 2W, tradition S frequency range observing and controlling relatively improves the rate of uplink and downlink, and tradition X band number passes relatively,
Increase uplink distant control function.
Combiner is to send satellite afterwards all the way to the synthesis of day antenna and over the ground antenna received uplink 6000MHz radiofrequency signal
Radio-frequency front-end, system guarantee link margin in the case where, using to day over the ground two slave antennas guarantee it is uncertain in the attitude of satellite
In the case of, it can still receive uplink remote signal；
Radio-frequency front-end is integrated with the function of the dielectric filter of micromation and the low noise of high-gain low-noise coefficient, to upper
Row 6000MHz radiofrequency signal carries out wideband filtered, low noise amplification, and interim broadband filter has 60dB to downlink 4000MHz
Above inhibition, when guaranteeing transmitting-receiving full duplex work, transceiver insulation；
Frequency mixer uses double balanced mixer, is by the amplified 6000MHz radiofrequency signal of radio frequency front-end filter and lock
The 5600MHz signal that phase local oscillator 1 exports carries out down being mixed to 400MHz, and conversion gain controller is sent to handle；
The mixing of conversion gain controller collection and 60dB automatic gain control function are integrated, the 400MHz that frequency mixer is exported
Signal amplifies and is mixed to 70MHz under the 330MHz signal exported afterwards with locking phase local oscillator 2, then exports after automatic growth control
The intermediate-freuqncy signal of 0dBm to digital baseband carries out AD sampling.
12 A/D chips of the low-power consumption that analog-digital converter uses export down coversion channel conversion gain controller
70MHz intermediate-freuqncy signal carry out bandpass sampling after send to processing chip FPGA；
FPGA is that uplink remote control or data block will be exported after AD sampled signal frequency locking locking phase, bit synchronization, frame synchronization to whole star
Integrated electronics, wherein information rate is that 64Kbps improves 32 times, mention compared to the remote control rate of conventional S-band observing and controlling 2Kbps
The high efficiency of uplink；Simultaneously by load data and downlink telemetry data carry out group detect, scramble, encode after export to low pass filtered
Wave device, while meeting the function of lower line number biography and downlink telemetry；
Low-pass filter is to carry out low-pass filtering treatment to the downgoing baseband signal of FPGA output, since FPGA exports base band
Signal is square wave, there is harmonic wave more abundant, needs to reduce harmonic signal with low-pass filter, so that modulated signal secondary lobe
Inhibition is met the requirements, and downlink signal rate is 2MHz, and is modulated using BPSK, so low-pass filter 1dB bandwidth is set as
2MHz。
Modulator is directly by modulates baseband signals on downlink 4000MHz carrier wave, and modulator has 0.11dB amplitude not
The degree of balance, the superior index of 0.13 degree of phase unbalance degree guarantee modulating performance；
Filter is filtered to the modulated signal of modulator output, filters out harmonic wave and clutter, which adopts
With the dielectric filter of micromation, while guaranteeing performance of filter, volume weight is saved；
Power amplifier is mainly the amplification that high-gain is carried out to downlink signal, and into link calculation is crossed, power amplifier needs to export
2W, in order to reduce power consumption, using the power amplifier of high gain and high efficiency；
Isolator is mainly the impedance matching guaranteed between power amplifier and transmitting antenna.
Crystal oscillator uses 20MHz temperature compensating crystal oscillator, guarantees to reduce power consumption while frequency accuracy stability, crystal oscillator is locking phase local oscillator
1, locking phase local oscillator 2, locking phase local oscillator 3 and FPGA provide reference clock；
Locking phase local oscillator 1, locking phase local oscillator 2, locking phase local oscillator 3 use identical functional block diagram, as shown in figure 3, reference frequency
20MHz, output frequency is that (20 ÷ R × N) MHz, interim R and N can carry out software control by SPI interface, hard not changing
Under conditions of part platform, upper and lower line frequency is adjusted, adapts to the General design of micro-nano satellite.Locking phase local oscillator 1, R=1, N
=280,5600MHz local oscillation signal is generated after phase locking frequency multiplying to frequency mixer；Locking phase local oscillator 2, R=20, N=330, after phase locking frequency multiplying
330MHz local oscillation signal is generated to conversion gain controller；Locking phase local oscillator 3, R=1, N=200 are generated after phase locking frequency multiplying
4000MHz local oscillation signal is to modulator.
Obviously, those skilled in the art can carry out various changes and deformation without departing from essence of the invention to the present invention
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (6)
1. a kind of one-board feed element applied to micro-nano satellite, which is characterized in that including down coversion channel, digital baseband,
Up-conversion passage and local oscillator；The down coversion channel includes combiner, radio-frequency front-end, frequency mixer, conversion gain controller and two
In put；The digital baseband includes power supply processing, analog-digital converter, FPGA and low-pass filter；The up-conversion passage
Including modulator, filter, power amplifier and isolator；The local oscillator includes crystal oscillator, the first locking phase local oscillator, the second locking phase sheet
Vibration and third locking phase local oscillator；
The combiner is used to send satellite to the synthesis of day antenna and over the ground antenna received upstream radio-frequency signal afterwards all the way
The signal received is filtered, is sent to mixing after high-gain low-noise amplification by the radio-frequency front-end, the radio-frequency front-end
Device, the frequency mixer are mixed and are sent under carrying out the radiofrequency signal received with the signal that the first locking phase local oscillator exports
Conversion gain controller, the conversion gain controller by the signal received amplify and with the second locking phase local oscillator export
Signal exports intermediate-freuqncy signal to the digital baseband after carrying out down coversion and automatic growth control；
The primary power source that the power supply processing provides whole star is each module for power supply of feed element, the mould after carrying out steady pressure treatment
Quasi- digital quantizer will be sent to FPGA after intermediate-freuqncy signal progress AD sampling that the down coversion channel export, the FPGA is by AD
Uplink remote control or data block are exported after sampled signal frequency locking locking phase, bit synchronization, frame synchronization to whole star integrated electronics, while by load
Data and downlink telemetry data export after group is detectd, scrambled, encoding to low-pass filter；The low-pass filter is to FPGA
The downgoing baseband signal of output exports after carrying out low-pass filtering treatment to up-conversion passage；
The downgoing baseband signal that digital baseband exports is modulated the downlink exported to third locking phase local oscillator and carried by the modulator
In wave frequency rate, the modulated signal that the filter exports modulator is filtered, and filters out harmonic wave and clutter, the power
The gain that amplifier carries out high gain and high efficiency to downlink signal is amplified, and the isolator is for guaranteeing power amplifier and transmitting
Impedance matching between antenna；
The crystal oscillator is the first locking phase local oscillator, the second locking phase local oscillator, third locking phase local oscillator and FPGA provide reference clock, described
Local oscillation signal is generated after the clock signal phase locking frequency multiplying that one locking phase local oscillator provides crystal oscillator to frequency mixer, the second locking phase local oscillator
Local oscillation signal is generated after the clock signal phase locking frequency multiplying that crystal oscillator is provided to conversion gain controller, the third locking phase local oscillator will
Local oscillation signal is generated after the clock signal phase locking frequency multiplying that crystal oscillator provides to modulator.
2. being applied to the one-board feed element of micro-nano satellite as described in claim 1, which is characterized in that the frequency mixer is adopted
Use double balanced mixer.
3. being applied to the one-board feed element of micro-nano satellite as described in claim 1, which is characterized in that the simulation numeral
Converter uses 12 A/D chips.
4. being applied to the one-board feed element of micro-nano satellite as described in claim 1, which is characterized in that the crystal oscillator uses
20MHz temperature compensating crystal oscillator.
5. being applied to the one-board feed element of micro-nano satellite as described in claim 1, which is characterized in that the modulator is straight
It connects by modulates baseband signals on downlink 4000MHz carrier wave, the degree of unbalancedness of modulator is 0.11dB amplitude, phase unbalance degree
It is 0.13 degree.
6. the one-board feed element applied to micro-nano satellite as described in any claim in claims 1 to 5, feature
It is, the first locking phase local oscillator, the second locking phase local oscillator and third locking phase local oscillator are equal are as follows: reference frequency 20MHz, output frequency
(20 ÷ R × N) MHz generates 5600MHz local oscillation signal wherein the first locking phase local oscillator R=1, N=280, after phase locking frequency multiplying to being mixed
Device；Second locking phase local oscillator R=20, N=330 generates 330MHz local oscillation signal after phase locking frequency multiplying to conversion gain controller；Third
Locking phase local oscillator R=1, N=200 generates 4000MHz local oscillation signal after phase locking frequency multiplying to modulator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811209404.6A CN109560854A (en) | 2018-10-17 | 2018-10-17 | A kind of one-board feed element applied to micro-nano satellite |
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| CN201811209404.6A CN109560854A (en) | 2018-10-17 | 2018-10-17 | A kind of one-board feed element applied to micro-nano satellite |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110971252A (en) * | 2019-12-06 | 2020-04-07 | 北京自动化控制设备研究所 | Satellite navigation radio frequency front-end circuit and clock circuit |
| CN112468221A (en) * | 2020-11-25 | 2021-03-09 | 浙江吉利控股集团有限公司 | Radio frequency channel for microsatellite measurement and transmission all-in-one machine and measurement and transmission all-in-one machine |
| CN113055074A (en) * | 2021-02-08 | 2021-06-29 | 浙江时空道宇科技有限公司 | Satellite-borne communication system |
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Application publication date: 20190402 |