CN106921406B - A kind of twin crystal vibration switching TT&C Transponder and its switching method - Google Patents
A kind of twin crystal vibration switching TT&C Transponder and its switching method Download PDFInfo
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- CN106921406B CN106921406B CN201710221991.XA CN201710221991A CN106921406B CN 106921406 B CN106921406 B CN 106921406B CN 201710221991 A CN201710221991 A CN 201710221991A CN 106921406 B CN106921406 B CN 106921406B
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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
- H04B1/59—Responders; Transponders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
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- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
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- General Physics & Mathematics (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
It shakes the invention discloses a kind of twin crystal and switches TT&C Transponder and its switching method.The TT&C Transponder includes: receiving front-end, phase discriminator, loop filter, voltage controlled crystal oscillator, phase shifter, multiplier, comparator, disconnecting switch, switching switch, temperature compensating crystal oscillator, voltage-stablizer, front end of emission.The switching method includes: that one of crystal oscillation signal is used to close another crystal oscillation signal when motivating as transmitting；Under Coherence Mode, the power supply of temperature compensating crystal oscillator is closed, voltage controlled crystal oscillator provides excitation；Under non-coherent mode, voltage controlled crystal oscillator works with temperature compensating crystal oscillator, but the pumping signal from voltage controlled crystal oscillator is cut off, and only temperature compensating crystal oscillator provides excitation.Switching between two-way crystal oscillation signal is controlled by phase lock loop locks instructed voltage.Of the invention twin crystal vibration switching TT&C Transponder and its switching method can guarantee the pure of high degree of isolation between two-way crystal oscillation signal and emission spectrum.
Description
Technical field
The present invention relates to Space TT&C technical field, in particular to a kind of twin crystal vibration switches TT&C Transponder and its cuts
Change method.
Background technique
TT&C Transponder is the important component of satellite TT&C subsystem, is the main thoroughfare got in touch with of star ground, main
Face the task of the information such as tracking and the orbit measurement of satellite, and transmission remote control, telemetering with being used for.TT&C Transponder is usual
There are relevant and incoherent two kinds of operating modes.Answering machine is Coherence Mode, i.e. phase between sending and receiving signal when locking uplink signal
Relevant, the two is forwarded by the same frequency source, i.e. voltage controlled crystal oscillator inside answering machine.Answering machine can under Coherence Mode
It is tested the speed with completion, the function of ranging.It is non-coherent mode when the unlocked uplink signal of answering machine.Under non-coherent mode, response
The downlink signal of machine comes from temperature compensating crystal oscillator, therefore sending and receiving phase is irrelevant.At this point, answering machine sends the load of a phase stabilization
Tracking beacon of the wave as earth station.Under non-coherent mode, answering machine do not have test the speed, distance measurement function, just correspond to one
With the telemetering transmiter for stablizing beacon.
Due to having voltage controlled crystal oscillator and two crystal oscillators of temperature compensating crystal oscillator inside TT&C Transponder, will appear between two crystal oscillators mutually
The case where interference, the frequency beating signal modulation for often appearing as two crystal oscillators on the downstream carriers, form the band of emission spectrum
Outer clutter.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, propose a kind of twin crystal vibration switching TT&C Transponder and its
Switching method.The TT&C Transponder is using one of crystal oscillator by the control to switching switch, disconnecting switch, voltage-stablizer
Another crystal oscillation signal is closed when signal is as transmitting excitation.Under Coherence Mode, the power supply of temperature compensating crystal oscillator is closed, it is voltage-controlled
Crystal oscillator provides excitation；Under non-coherent mode, voltage controlled crystal oscillator works with temperature compensating crystal oscillator, but the pumping signal from voltage controlled crystal oscillator
It is cut off, only temperature compensating crystal oscillator provides excitation.Switching between two-way crystal oscillation signal is controlled by phase lock loop locks instructed voltage.
It is shaken using the twin crystal and switches TT&C Transponder and its switching method, it is ensured that the high degree of isolation between two-way crystal oscillation signal.
In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
The present invention provides a kind of twin crystal vibration switching TT&C Transponder, comprising: receiving front-end, phase discriminator, loop filter, pressure
Control crystal oscillator, phase shifter, multiplier, comparator, disconnecting switch, switching switch, temperature compensating crystal oscillator, voltage-stablizer, front end of emission；
Wherein:
The output end of the receiving front-end is divided into two-way, is connected all the way with phase discriminator primary input end, all the way with it is described
Multiplier primary input end is connected；
The phase detector output is connected with the loop filter input terminal；
The loop filter output end is connected with the voltage controlled crystal oscillator control terminal；
The voltage controlled crystal oscillator output end is divided into three tunnels, is connected all the way with the disconnecting switch input terminal, all the way with the mirror
Phase device reference input is connected, and is connected all the way with the phase shifter inputs；
The phase shifter output end is connected with the multiplier reference input；
The multiplier outputs are connected with the comparator input terminal；
The comparator output terminal is divided into three tunnels, the control switched respectively with the control terminal of the disconnecting switch, the switching
End processed is connected with the enable end of the voltage-stablizer；
The disconnecting switch output end is connected with switching switch first input end；
The output end of voltage stabilizer is connected with the temperature compensating crystal oscillator feeder ear, the temperature compensating crystal oscillator output end and the switching
The second input terminal of switch is connected；
The switching output switching terminal is connected with the front end of emission input terminal.
Based on the same inventive concept, it shakes the present invention also provides a kind of twin crystal and switches the switching method of TT&C Transponder, base
In a kind of twin crystal vibration switching TT&C Transponder as described in claim 1, comprising the following steps:
S1: the uplink signal that receiving front-end receives TT&C Transponder, which obtains medium frequency reception by radio band down coversion, to be believed
Number, and may amplify the signal to preset level；
S2: phase discriminator, loop filter, voltage controlled crystal oscillator form a phase-locked loop, in receiving front-end output
Frequency receives signal and carries out locking and frequency-tracking, and generate signal input the disconnecting switch as the first transmitting pumping signal and
The phase shifter is inputted as phase shifter input signal；
S3: input multiplier is as multiplier with reference to letter after the phase shifter input signal is carried out 90 ° of phase shifts by phase shifter
Number, multiplier receives and exports a phaselocked loop state voltage to comparator after the received IF signal, and comparator is by the locking phase
Output to the disconnecting switch, voltage-stablizer, switching switchs after ring status voltage is converted to locking instructed voltage；
S4: disconnecting switch is under the control of locking instructed voltage, before selecting disconnection or connection voltage controlled crystal oscillator to be transferred to transmitting
The first transmitting pumping signal at end,
Switching switch locking instructed voltage control under, selection by from voltage controlled crystal oscillator first transmitting pumping signal or
The second transmitting pumping signal from temperature compensating crystal oscillator is transmitted to the front end of emission,
Voltage-stablizer selects the power supply of open or closed temperature compensating crystal oscillator under the control of locking instructed voltage, and the temperature compensation is brilliant
Vibration the second transmitting of output pumping signal under the voltage-stablizer electric power thus supplied；
S5: front end of emission swashs the first transmitting pumping signal from voltage controlled crystal oscillator or the second transmitting from temperature compensating crystal oscillator
It encourages signal up-conversion and obtains radio frequency transmissions, exported after amplification.
As a kind of prioritization scheme, the step S2 further comprises:
Voltage controlled crystal oscillator output signal is carried out phase by S11, phase discriminator
Compare, generates comparison voltage；
Comparison voltage is changed by integral and amplification and is used to control voltage controlled crystal oscillator output frequency by S12, loop filter
Control voltage, when phase-locked loop is lock state, the signal that voltage controlled crystal oscillator output phase and received IF signal are concerned with is made
For the first transmitting pumping signal, phase discriminator reference signal and phase shifter input signal.
As a kind of prioritization scheme, the step S3 further comprises:
S31: when TT&C Transponder works in Coherence Mode, phase lock loop locks, multiplier two-way input signal phase phase
Dry, multiplier output voltage is higher than comparator reference voltage, and the locking instructed voltage of comparator output is high level；
S32: when TT&C Transponder works in non-coherent mode, phaselocked loop losing lock, multiplier two-way input signal phase
Irrelevant, multiplier output voltage is lower than comparator reference voltage, and the locking instructed voltage of comparator output is low level.
As a kind of prioritization scheme, the step S4 further comprises:
When TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, and disconnecting switch is indicated in locking
Under the control of voltage, selection connection voltage controlled crystal oscillator is transferred to the first transmitting pumping signal of front end of emission,
When TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, and disconnecting switch refers in locking
Show under the control of voltage, selection disconnects the first transmitting pumping signal that voltage controlled crystal oscillator is transferred to front end of emission.
As a kind of prioritization scheme, the step S4 further comprises:
When TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, and switching switch is indicated in locking
Under the control of voltage, the first transmitting pumping signal from voltage controlled crystal oscillator is transmitted to the front end of emission by selection.
When TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, and switching switch refers in locking
Show under the control of voltage, the second transmitting pumping signal from temperature compensating crystal oscillator is transmitted to the front end of emission by selection.
As a kind of prioritization scheme, the step S4 further comprises:
When TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, and voltage-stablizer is in locking instruction electricity
Under the control of pressure, selection disconnects the power supply of temperature compensating crystal oscillator；
When TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, and voltage-stablizer is indicated in locking
Under the control of voltage, the power supply of temperature compensating crystal oscillator is connected in selection.
Compared to the prior art, the invention has the following advantages that
(1) under Coherence Mode, temperature compensating crystal oscillator does not work, the transmitting pumping signal that voltage controlled crystal oscillator will not be interfered to generate.
(2) under non-coherent mode, the pumping signal from voltage controlled crystal oscillator is by disconnecting switch and switches switch OFF, and
Only excitation is provided by temperature compensating crystal oscillator.Be able to maintain between the output signal of voltage controlled crystal oscillator and the output signal of temperature compensating crystal oscillator height every
From, it is ensured that the transmitting pumping signal that the output signal of voltage controlled crystal oscillator will not interfere temperature compensating crystal oscillator to generate.
(3) since under non-coherent mode, voltage controlled crystal oscillator is still working, therefore TT&C Transponder can be captured at any time, be locked
Uplink signal is switched to Coherence Mode.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
Embodiments of the present invention are described further with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of twin crystal vibration switching TT&C Transponder of the invention；
Fig. 2 is the flow chart of the switching method of twin crystal vibration switching TT&C Transponder of the invention.
Label declaration: 1- receiving front-end, 2- phase discriminator, 3- loop filter, 4- voltage controlled crystal oscillator, 5- phase shifter, 6- multiplication
Device, 7- comparator, 8- disconnecting switch, 9- switch switch, 10- temperature compensating crystal oscillator, 11- voltage-stablizer, 12- front end of emission.
Specific embodiment
It elaborates below to the embodiment of the present invention, the present embodiment carries out under the premise of the technical scheme of the present invention
Implement, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to following implementation
Example.
In order to better illustrate the present invention, hereby with two preferred embodiments, and Fig. 1 is cooperated to elaborate specifically the present invention
It is as follows.
Embodiment 1:
In conjunction with Fig. 1, the present embodiment detailed description of the present invention twin crystal vibration switching TT&C Transponder.
As shown in Figure 1, twin crystal provided by the invention vibration switching TT&C Transponder comprising: receiving front-end 1, phase discriminator 2,
Loop filter 3, voltage controlled crystal oscillator 4, phase shifter 5, multiplier 6, comparator 7, disconnecting switch 8, switching switch 9, temperature compensating crystal oscillator 10,
Voltage-stablizer 11, front end of emission 12.Wherein:
The output end of receiving front-end 1 is divided into two-way, is connected all the way with the primary input end of phase discriminator 2, all the way with multiplier 6
Primary input end is connected.Receiving front-end 1 is for the uplink signal that TT&C Transponder receives to be down-converted to by radio band (2GHz)
Mid Frequency (9MHz), and may amplify the signal to 0dBm, so that subsequent conditioning circuit is for further processing to signal.
The output end of phase discriminator 2 is connected with the input terminal of loop filter 3.The output end of loop filter 3 and voltage-controlled crystalline substance
The control terminal of vibration 4 is connected.The output end of voltage controlled crystal oscillator 4 is divided into three tunnels, is connected all the way with the input terminal of disconnecting switch 8, all the way with
The reference input of phase discriminator 2 is connected, and is connected all the way with the input terminal of phase shifter 5.
Phase discriminator 2 is used to the output signal of voltage controlled crystal oscillator 4 and received IF signal carrying out phase bit comparison, generates reflection two
The comparison voltage of road signal phase difference.Loop filter 3 by integral and amplification, comparison voltage is changed into can control it is voltage-controlled
The control voltage of 4 output frequency of crystal oscillator.Phase discriminator 2, loop filter 3, voltage controlled crystal oscillator 4 form a phase-locked loop, for pair
The received IF signal of receiving front-end output carries out locking and frequency-tracking, and generates the ginseng of transmitting pumping signal and multiplier 6
Examine signal.The phase characteristic of phase discriminator 2 is longitudinal cosine type, therefore after loop-locking, before the output signal and reception of voltage controlled crystal oscillator 4
The output signal at end 1 is 90 ° orthogonal.
The output end of phase shifter 5 is connected with the reference input of multiplier 6.The output end of multiplier 6 is defeated with comparator 7
Enter end to be connected.The output end of comparator 7 is divided into three tunnels, respectively with the control terminal of disconnecting switch 8, switch switch 9 control terminal and
The enable end of voltage-stablizer 11 is connected.
Reference signal after signal 90 ° of phase shifts of progress that phase shifter 5 is used to export voltage controlled crystal oscillator 4 as multiplier 6.Multiply
Musical instruments used in a Buddhist or Taoist mass 6 exports voltage relevant to loop-locking state.The voltage that multiplier 6 exports is converted to locking instruction electricity by comparator 7
Press Vs.When TT&C Transponder works in Coherence Mode, phase lock loop locks, multiplier two-way input signal phase is identical, multiplication
Device output voltage is higher than comparator reference voltage Vr, and the locking instructed voltage Vs of comparator output is high level+5V.When observing and controlling is answered
When the machine of answering works in non-coherent mode, phaselocked loop losing lock, multiplier two-way input signal phase is irrelevant, multiplier output voltage
Lower than comparator reference voltage Vr, the locking instructed voltage Vs of comparator output is low level 0V.
The output end of disconnecting switch 8 is connected with the input terminal 1 of switching switch 9.Disconnecting switch 8 is locking instructed voltage Vs's
Under control, closes or connection voltage controlled crystal oscillator 4 is conveyed to the first of front end of emission 12 and emits pumping signal.When TT&C Transponder works
When Coherence Mode, locking instructed voltage Vs is high level+5V, and voltage controlled crystal oscillator 10 exports transmitting pumping signal to front end of emission
12；When TT&C Transponder works in non-coherent mode, locking instructed voltage Vs is low level 0V, voltage controlled crystal oscillator 4 export the
One transmitting pumping signal is turned off.
The output end of switching switch 9 is connected with the input terminal of front end of emission 12.Switch switch 9 locking instructed voltage Vs's
Under control, determine that the transmitting pumping signal for being defeated by front end of emission 12 is from voltage controlled crystal oscillator 4 or temperature compensating crystal oscillator 10.When observing and controlling is answered
When the machine of answering works in Coherence Mode, locking instructed voltage is+5V, and the signal that voltage controlled crystal oscillator 4 exports will be sent to front end of emission；Work as survey
When control answering machine works in non-coherent mode, locking instructed voltage is 0V, before the signal that temperature compensating crystal oscillator 10 exports will be sent to transmitting
End 12.
The output end of voltage-stablizer 11 is connected with the feeder ear of temperature compensating crystal oscillator 10, and the output end of temperature compensating crystal oscillator 10 and switching switch
9 input terminal 2 is connected.The enable end of voltage-stablizer 11 is that low level is effective, under the control of locking instructed voltage Vs, closes or connects
The supply voltage Vcc of logical temperature compensating crystal oscillator 10.When TT&C Transponder works in Coherence Mode, locking instructed voltage Vs is+5V, surely
For depressor without output, the confession of temperature compensating crystal oscillator 10 is electrically disconnected, does not work, no signal output；When TT&C Transponder works in non-coherent mode
When, locking instructed voltage Vs is 0V, and supply voltage Vcc is delivered to the feeder ear of temperature compensating crystal oscillator 10, temperature compensating crystal oscillator by voltage-stablizer 11
10 output signal is as transmitting pumping signal.
Front end of emission 12 is by the transmitting pumping signal up-conversion from voltage controlled crystal oscillator 4 or temperature compensating crystal oscillator 10 to radio band
(2GHz) is exported after being amplified to 30dBm.
The TT&C Transponder of the present embodiment is controlled by phase lock loop locks instructed voltage Vs between two-way crystal oscillation signal
Switching.Under Coherence Mode, voltage controlled crystal oscillator 4 provides excitation, while temperature compensating crystal oscillator 10 does not work, and voltage controlled crystal oscillator 4 will not be interfered to produce
Raw transmitting pumping signal；Under non-coherent mode, voltage controlled crystal oscillator 4 is worked at the same time with temperature compensating crystal oscillator 10, but comes from voltage controlled crystal oscillator 4
Pumping signal be isolated switch 8 and switching switch 9 cut off, and only by temperature compensating crystal oscillator 10 offer excitation.At this time in emission spectrum
Frequency beating signal from voltage controlled crystal oscillator 4 is 70dB or more lower than the main signal from temperature compensating crystal oscillator 10, ensure that two-way crystal oscillator
High degree of isolation and emission spectrum between signal it is pure.
Embodiment 2:
In conjunction with Fig. 2, the method for the present embodiment detailed description of the present invention TT&C Transponder twin crystal vibration switching comprising following
Step:
S1: receiving front-end is used to the uplink signal that TT&C Transponder receives being down-converted to Mid Frequency by radio band, and
It may amplify the signal to level appropriate, so that subsequent conditioning circuit is for further processing to signal.
S2: phase discriminator, loop filter, voltage controlled crystal oscillator form a phase-locked loop, used in exporting to receiving front-end
Frequency receives signal and carries out locking and frequency-tracking, and generates the reference signal of transmitting pumping signal and multiplier.
Preferably, the step S1 further comprises:
S11: phase discriminator is used to voltage controlled crystal oscillator output signal and received IF signal carrying out phase bit comparison, generates reflection two
The comparison voltage of road signal phase difference.
S12: comparison voltage is changed by integral and amplification and can control voltage controlled crystal oscillator output frequency by loop filter
Control voltage.
S13: when phase lock loop locks, the signal that voltage controlled crystal oscillator output phase is concerned with received IF signal, as transmitting
Pumping signal, phase discriminator reference signal and phase shifter input signal.
Phaselocked loop has locking and losing lock two states.The control source of two states is the intermediate frequency letter at phase discriminator primary input end
Number.Voltage controlled crystal oscillator has an operating frequency range, voltage-controlled when the IF signal frequency of phase discriminator input is in this working range
The output frequency of crystal oscillator will automatic synchronization intermediate-freuqncy signal frequency (phase coherence), this process referred to as " locking ", " tracking ".
When the IF signal frequency of phase discriminator input is outside voltage controlled crystal oscillator operating frequency range, voltage controlled crystal oscillator is in free oscillation shape
The frequency of state, output is unrelated with IF signal frequency (phase is irrelevant), this state is known as " losing lock ".
S3: the signal that phase shifter is used to export voltage controlled crystal oscillator is used as multiplier reference signal after carrying out 90 ° of phase shifts.Multiplication
Device exports voltage relevant to loop-locking state.The voltage that multiplier exports is converted to locking instructed voltage by comparator.
Preferably, the step S3 further comprises:
S31: when TT&C Transponder works in Coherence Mode, phase lock loop locks, multiplier two-way input signal phase phase
Dry, multiplier output voltage is higher than comparator reference voltage, and the locking instructed voltage of comparator output is high level.
S32: when TT&C Transponder works in non-coherent mode, phaselocked loop losing lock, multiplier two-way input signal phase
Irrelevant, multiplier output voltage is lower than comparator reference voltage, and the locking instructed voltage of comparator output is low level.
S4: disconnecting switch closes under the control of locking instructed voltage or connection voltage controlled crystal oscillator is conveyed to front end of emission
Emit pumping signal.
Preferably, the step S4 further comprises:
S41: when TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, voltage controlled crystal oscillator output hair
Pumping signal is penetrated to front end of emission.
S42: when TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, voltage controlled crystal oscillator output
Transmitting pumping signal be turned off.
S5: switching switch determines that the transmitting pumping signal for being defeated by front end of emission comes under the control of locking instructed voltage
Voltage controlled crystal oscillator or temperature compensating crystal oscillator.
Preferably, the step S5 further comprises:
S51: when TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, voltage controlled crystal oscillator output
Signal will be sent to front end of emission.
S52: when TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, temperature compensating crystal oscillator output
Signal will be sent to front end of emission.
S6: voltage-stablizer closes or turns on the power supply of temperature compensating crystal oscillator under the control of locking instructed voltage.
Preferably, the step S6 further comprises:
S61: when TT&C Transponder works in Coherence Mode, voltage-stablizer is without output, and temperature compensating crystal oscillator is for electrically disconnected, not work
Make, no signal output.
S62: when TT&C Transponder works in non-coherent mode, supply voltage is delivered to temperature compensating crystal oscillator and powered by voltage-stablizer
End, temperature compensating crystal oscillator output signal is as transmitting pumping signal.
S7: front end of emission amplifies the transmitting pumping signal up-conversion from voltage controlled crystal oscillator or temperature compensating crystal oscillator to radio band
After export.
Disclosed herein is merely a preferred embodiment of the present invention, these embodiments are chosen and specifically described to this specification, is
Principle and practical application in order to better explain the present invention is not limitation of the invention.Anyone skilled in the art
The modifications and variations done within the scope of specification should all be fallen in the range of of the invention protect.
Claims (7)
1. a kind of twin crystal vibration switching TT&C Transponder characterized by comprising receiving front-end, phase discriminator, loop filter, pressure
Control crystal oscillator, phase shifter, multiplier, comparator, disconnecting switch, switching switch, temperature compensating crystal oscillator, voltage-stablizer, front end of emission；
Wherein:
The output end of the receiving front-end is divided into two-way, is connected all the way with phase discriminator primary input end, all the way with the multiplication
Device primary input end is connected；
The phase detector output is connected with the loop filter input terminal；
The loop filter output end is connected with the voltage controlled crystal oscillator control terminal；
The voltage controlled crystal oscillator output end is divided into three tunnels, is connected all the way with the disconnecting switch input terminal, all the way with the phase discriminator
Reference input is connected, and is connected all the way with the phase shifter inputs；
When TT&C Transponder works in Coherence Mode, the isolation is connected in the locking instructed voltage control of the comparator output
Switch, controlling the switching switch makes the signal of the voltage controlled crystal oscillator output be sent to the front end of emission, and makes described steady
Depressor is without output；When TT&C Transponder works in non-coherent mode, the locking instructed voltage control of the comparator output is disconnected
The disconnecting switch is opened, controlling the switching switch makes the signal of the temperature compensating crystal oscillator output be sent to the front end of emission, and
And make the voltage-stablizer temperature compensating crystal oscillator power supply；
The phase shifter output end is connected with the multiplier reference input；
The multiplier outputs are connected with the comparator input terminal；
The receiving front-end is used for the uplink signal that receives TT&C Transponder by becoming section under radio frequency to Mid Frequency, and by signal
Amplification；The phase discriminator is used to the output signal of the voltage controlled crystal oscillator and received IF signal carrying out phase bit comparison, generates anti-
Reflect the comparison voltage of two paths of signals phase difference；For the loop filter by integral and amplification, comparison voltage is changed into can be with
Control the control voltage of the voltage controlled crystal oscillator output frequency；The phase discriminator, loop filter and voltage controlled crystal oscillator composition one
A phase-locked loop, the received IF signal for exporting to receiving front-end carry out locking and frequency-tracking, and generate transmitting excitation
The reference signal of signal and the multiplier；The signal that the phase shifter is used to export the voltage controlled crystal oscillator carries out 90 ° of phase shifts
Reference signal as the multiplier afterwards；The multiplier exports voltage relevant to loop-locking state；The comparator
The voltage that the multiplier exports is converted into locking instructed voltage；The front end of emission will come from the voltage controlled crystal oscillator or described
The transmitting pumping signal up-conversion of temperature compensating crystal oscillator exports after amplification to radio band；
The comparator output terminal is divided into three tunnels, the control terminal switched respectively with the control terminal of the disconnecting switch, the switching
It is connected with the enable end of the voltage-stablizer；
The disconnecting switch output end is connected with switching switch first input end；
The output end of voltage stabilizer is connected with the temperature compensating crystal oscillator feeder ear, and the temperature compensating crystal oscillator output end and the switching switch
Second input terminal is connected；
The switching output switching terminal is connected with the front end of emission input terminal.
2. a kind of switching method of twin crystal vibration switching TT&C Transponder, which is characterized in that based on as described in claim 1 a kind of
Twin crystal vibration switching TT&C Transponder, comprising the following steps:
S1: the uplink signal that receiving front-end receives TT&C Transponder obtains received IF signal by radio band down coversion, and
It may amplify the signal to preset level；
S2: phase discriminator, loop filter, voltage controlled crystal oscillator form a phase-locked loop, connect to the intermediate frequency of receiving front-end output
The collection of letters number carries out locking and frequency-tracking, and generates signal and input the disconnecting switch as the first transmitting pumping signal and input
The phase shifter is as phase shifter input signal；
S3: input multiplier multiplies as multiplier reference signal after the phase shifter input signal is carried out 90 ° of phase shifts by phase shifter
Musical instruments used in a Buddhist or Taoist mass receives and exports a phaselocked loop state voltage to comparator after the received IF signal, and comparator is by the phaselocked loop state
Output to the disconnecting switch, voltage-stablizer, switching switchs after voltage is converted to locking instructed voltage；
S4: disconnecting switch is under the control of locking instructed voltage, and selection disconnects or connection voltage controlled crystal oscillator is transferred to front end of emission
The first transmitting pumping signal,
For switching switch under the control of locking instructed voltage, selection is by the first transmitting pumping signal from voltage controlled crystal oscillator or comes from
Second transmitting pumping signal of temperature compensating crystal oscillator is transmitted to the front end of emission,
Voltage-stablizer selects the power supply of open or closed temperature compensating crystal oscillator, the temperature compensating crystal oscillator exists under the control of locking instructed voltage
The second transmitting of output pumping signal under the voltage-stablizer electric power thus supplied；
S5: front end of emission believes the first transmitting pumping signal from voltage controlled crystal oscillator or the second transmitting excitation from temperature compensating crystal oscillator
Number up-conversion obtains radio frequency transmissions, exports after amplification.
3. according to a kind of switching method as claimed in claim 2, which is characterized in that the step S2 further comprises:
Voltage controlled crystal oscillator output signal is carried out phase bit comparison by S11, phase discriminator,
Generate comparison voltage；
Comparison voltage is changed into the control for being used to control voltage controlled crystal oscillator output frequency by integral and amplification by S12, loop filter
Voltage processed, when phase-locked loop is lock state, the signal that voltage controlled crystal oscillator output phase and received IF signal are concerned with, as the
One transmitting pumping signal, phase discriminator reference signal and phase shifter input signal.
4. according to a kind of switching method as claimed in claim 2, which is characterized in that the step S3 further comprises:
S31: when TT&C Transponder works in Coherence Mode, phase lock loop locks, multiplier two-way input signal phase coherence multiplies
Musical instruments used in a Buddhist or Taoist mass output voltage is higher than comparator reference voltage, and the locking instructed voltage of comparator output is high level；
S32: when TT&C Transponder works in non-coherent mode, phaselocked loop losing lock, multiplier two-way input signal phase not phase
Dry, multiplier output voltage is lower than comparator reference voltage, and the locking instructed voltage of comparator output is low level.
5. according to a kind of switching method as claimed in claim 2, which is characterized in that the step S4 further comprises:
When TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, and disconnecting switch is in locking instructed voltage
Control under, selection connection voltage controlled crystal oscillator be transferred to front end of emission it is described first transmitting pumping signal,
When TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, and disconnecting switch is in locking instruction electricity
Under the control of pressure, selection disconnects the first transmitting pumping signal that voltage controlled crystal oscillator is transferred to front end of emission.
6. according to a kind of switching method as claimed in claim 2, which is characterized in that the step S4 further comprises:
When TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, and switching switch is in locking instructed voltage
Control under, selection by from voltage controlled crystal oscillator first transmitting pumping signal be transmitted to the front end of emission；
When TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, and switching switch is in locking instruction electricity
Under the control of pressure, the second transmitting pumping signal from temperature compensating crystal oscillator is transmitted to the front end of emission by selection.
7. according to a kind of switching method as claimed in claim 2, which is characterized in that the step S4 further comprises:
When TT&C Transponder works in Coherence Mode, locking instructed voltage is high level, and voltage-stablizer is in locking instructed voltage
Under control, selection disconnects the power supply of temperature compensating crystal oscillator；
When TT&C Transponder works in non-coherent mode, locking instructed voltage is low level, and voltage-stablizer is in locking instructed voltage
Control under, selection connect temperature compensating crystal oscillator power supply.
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Citations (4)
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| US4063173A (en) * | 1976-04-01 | 1977-12-13 | Motorola, Inc. | Dual mode receiver |
| CN1874159A (en) * | 2005-05-30 | 2006-12-06 | 株式会社半导体能源研究所 | Clock generation circuit and semiconductor device provided therewith |
| CN104158553A (en) * | 2014-08-28 | 2014-11-19 | 上海航天电子通讯设备研究所 | Hybrid loop of phase-locked receiver |
| CN105306080A (en) * | 2015-11-30 | 2016-02-03 | 上海航天测控通信研究所 | X-band satellite-borne phase-locked receiver |
-
2017
- 2017-04-06 CN CN201710221991.XA patent/CN106921406B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4063173A (en) * | 1976-04-01 | 1977-12-13 | Motorola, Inc. | Dual mode receiver |
| CN1874159A (en) * | 2005-05-30 | 2006-12-06 | 株式会社半导体能源研究所 | Clock generation circuit and semiconductor device provided therewith |
| CN104158553A (en) * | 2014-08-28 | 2014-11-19 | 上海航天电子通讯设备研究所 | Hybrid loop of phase-locked receiver |
| CN105306080A (en) * | 2015-11-30 | 2016-02-03 | 上海航天测控通信研究所 | X-band satellite-borne phase-locked receiver |
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