CN109286373A - Ku frequency range low-converter - Google Patents
Ku frequency range low-converter Download PDFInfo
- Publication number
- CN109286373A CN109286373A CN201811114346.9A CN201811114346A CN109286373A CN 109286373 A CN109286373 A CN 109286373A CN 201811114346 A CN201811114346 A CN 201811114346A CN 109286373 A CN109286373 A CN 109286373A
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- local oscillator
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
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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 kind of Ku frequency range low-converters, comprising: local oscillator module, frequency-variable module and control module；Wherein, the local oscillator module receives reference signal, and the local oscillation signal of output is exported to the frequency-variable module, and the Ku frequency range radio-frequency input signals of input is converted to IF output signal by the frequency-variable module；The control module is connected to the local oscillator module and frequency-variable module, to carry out the control of frequency and the feedback of state.The higher input frequency of Ku frequency range output low frequency rate intermediate frequency range by way of down coversion may be implemented in the Ku frequency range low-converter.
Description
Technical field
The present invention relates to converter technology fields, and in particular, to Ku frequency range low-converter.
Background technique
Microwave communication has become one of most important mode in nearly all dual-use communication system.Due to Ku frequency range
The ground small, power of interference is big, bandwidth, in addition to receive antenna efficiency higher for Ku frequency range, therefore most of satellite communication uses
Ku frequency range.Most of intermediate-frequency band in ground terminal system be 950-1450MHz, in order to by the satellite-signal received at end
End is handled, and Ku frequency range low-converter becomes one of the Primary Component in microwave telecommunication system.
Summary of the invention
The object of the present invention is to provide a kind of Ku frequency range low-converter, the Ku frequency range low-converter may be implemented Ku frequency range compared with
Height input frequency output low frequency rate intermediate frequency range by way of down coversion.
To achieve the goals above, the present invention provides Ku frequency range low-converters, which includes: local oscillator
Module, frequency-variable module and control module；Wherein, the local oscillator module receives reference signal, and the local oscillation signal of output is exported
To the frequency-variable module, the Ku frequency range radio-frequency input signals of input is converted to IF output signal by the frequency-variable module；It is described
Control module is connected to the local oscillator module and frequency-variable module, to carry out the control of frequency and the feedback of state.
Preferably, the local oscillator module includes: the first local oscillator module and the second local oscillator module, and the reference signal is by the
One power splitter is exported respectively to the first local oscillator module and the second local oscillator module, and the first local oscillator module uses antidetonation locking phase
Coaxial dielectric oscillating circuit obtains a local oscillation signal；The second local oscillator module obtains two local oscillation signals by fixed point frequency.
Preferably, the first local oscillator module includes sequentially connected with lower component: phase discriminator, loop filter, one
Shake CRO group, the second power splitter, the first amplifier, third power splitter, frequency multiplier and micro-strip hair clip filter；Wherein, the third
One output end of power splitter is connected to the frequency multiplier, and another output is connected to the phase discriminator.
Preferably, the phase discriminator is the phase discriminator that phase demodulation frequency is 50MHz, and the phase discriminator is exported in maximum frequency point
When phase noise be -86dBc/Hz@100Hz, -95dBc/Hz@1kHz, -103dBc/Hz@10kHz, -102dBc/Hz@
100kHz and -115dBc/Hz@1MHz.
Preferably, the second local oscillator module includes sequentially connected with lower component: the second amplifier, harmonic emissions device,
First filter, second filter, third amplifier and third filter.
Preferably, the frequency-variable module includes: first time down conversion module, and the first time down conversion module is connected to institute
Ku frequency range radio-frequency input signals is mixed under output first time by the output end for stating the first local oscillator module with a local oscillation signal
Frequency variation signal；
Second of down conversion module, second of down conversion module are connected to the output of second down conversion module
The first time down-conversion signal is mixed output intermediate-freuqncy signal by end with two local oscillation signal.
Preferably, the first time down conversion module includes sequentially connected with lower component: the 4th amplifier, the 4th filtering
Device, the first frequency mixer, the 5th filter, the 5th amplifier and attenuator；Wherein, the input terminal of first frequency mixer is also connected with
There is a local oscillation signal.
Preferably, second of down conversion module includes sequentially connected with lower component: the second frequency mixer, the 6th filtering
Device, the second attenuator, the 6th amplifier, third attenuator, the 7th amplifier, high-pass filter, the 4th power splitter and low pass filtered
Wave device；The power splitter exports IF output signal.
Preferably, the control module is connected to the local oscillator module and frequency-variable module by serial ports.
Preferably, the 4th filter and the 5th filter are MEMS filter；The loop filter, the first filtering
Device, second filter, third filter, the 6th filter, high-pass filter and low-pass filter are microstrip filter.
According to the above technical scheme, the present invention may be implemented the higher input frequency of Ku frequency range and be exported by way of down coversion
Low frequency intermediate frequency range, while phase noise can achieve -65dBc/Hz@100Hz, -75dBc/Hz@1kHz, -85dBc/Hz@
10kHz,-95dBc/Hz@100kHz,-107dBc/Hz@1MHz；Intermediate frequency output gain is adjustable；Noise coefficient and spuious output are small.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural block diagram for illustrating a kind of local oscillator module of the invention；
Fig. 2 a is the structural block diagram for illustrating a kind of first time down conversion module of the invention；
Fig. 2 b is the structural block diagram for illustrating a kind of second of down conversion module of the invention；
Fig. 3 a is the structural block diagram for illustrating a kind of control module of function of the invention；And
Fig. 3 b is the structural block diagram for illustrating the control module of another function of the invention.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of Ku frequency range low-converter, the Ku frequency range low-converter include: local oscillator module, frequency-variable module and
Control module；Wherein, the local oscillator module receives reference signal, and the local oscillation signal of output is exported to the frequency-variable module,
The Ku frequency range radio-frequency input signals of input is converted to IF output signal by the frequency-variable module；The control module is connected to institute
Local oscillator module and frequency-variable module are stated, to carry out the control of frequency and the feedback of state.
In a kind of specific embodiment of the invention, the local oscillator module may include: the first local oscillator module and second
Local oscillator module, the reference signal are exported respectively by the first power splitter to the first local oscillator module and the second local oscillator module,
The first local oscillator module obtains a local oscillation signal using shock resistant lock same axis medium oscillating circuit；The second local oscillator module is logical
It crosses fixed point frequency and obtains two local oscillation signals.
In this embodiment, the first local oscillator module includes sequentially connected with lower component: phase discriminator, loop filter
Wave device, a local oscillator CRO group, the second power splitter, the first amplifier, third power splitter, frequency multiplier and micro-strip hair clip filter；Its
In, an output end of the third power splitter is connected to the frequency multiplier, and another output is connected to the phase discriminator.
In this embodiment, the phase discriminator is the phase discriminator that phase demodulation frequency is 50MHz, and the phase discriminator is most
Phase noise when big frequency point output is -86dBc/Hz@100Hz, -95dBc/Hz@1kHz, -103dBc/Hz@10kHz, -
102dBc/Hz@100kHz and -115dBc/Hz@1MHz.
In this embodiment, the second local oscillator module includes sequentially connected with lower component: the second amplifier, humorous
Wave launcher, first filter, second filter, third amplifier and third filter.
In this embodiment, the frequency-variable module includes: first time down conversion module, the first time down coversion mould
Block is connected to the output end of the first local oscillator module, Ku frequency range radio-frequency input signals is mixed with a local oscillation signal defeated
First time down-conversion signal out；
Second of down conversion module, second of down conversion module are connected to the output of second down conversion module
The first time down-conversion signal is mixed output intermediate-freuqncy signal by end with two local oscillation signal.
In this embodiment, the first time down conversion module includes sequentially connected with lower component: the 4th amplification
Device, the 4th filter, the first frequency mixer, the 5th filter, the 5th amplifier and attenuator；Wherein, first frequency mixer
Input terminal is also connected with a local oscillation signal.
In this embodiment, second of down conversion module includes sequentially connected with lower component: the second mixing
Device, the 6th filter, the second attenuator, the 6th amplifier, third attenuator, the 7th amplifier, high-pass filter, the 4th function point
Device and low-pass filter；The power splitter exports IF output signal.
In this embodiment, the control module is connected to the local oscillator module and frequency-variable module by serial ports.
In this embodiment, the 4th filter and the 5th filter are MEMS filter；The loop filtering
Device, first filter, second filter, third filter, the 6th filter, high-pass filter and low-pass filter are micro-strip filter
Wave device.
It is as shown in Figure 1 the local oscillator module principle block diagram of the invention patent, the module is mainly to two down conversion modules
Corresponding local oscillation signal is provided, mainly by power splitter, loop filter, micro-strip hair clip filter, phaselocked loop, frequency multiplier, amplification
The part such as device forms.
One local oscillation signal of bandwidth needed for one local oscillator CRO group generates, passes through power splitter 1 (the second power splitter), amplifier 1
(the first amplifier) and power splitter 2 (third power splitter) are separately input into frequency multiplier and phase discriminator.Because of the output frequency model
Enclosing is to have a bandwidth of stepping frequency hopping function, and frequency hopping stepping is small, so decimal phase demodulation must be used, chooses phase demodulation frequency
For 50MHz, output phase noise can be calculated by following formula.
PNfloor=Floor FOM+10log (fpd)+20log (fvco/fpd)
PNflick=Flicker FOM+20log (fvco) -10log (foffset)
PN=10log (10^ (PNflick/10)+10^ (PNfloor/10))
By simulation calculation it can be concluded that a local oscillator CRO maximum frequency point output phase noise be -86dBc/Hz@100Hz, -
95dBc/Hz@1kHz、-103dBc/Hz@10kHz、-102dBc/Hz@100kHz、-115dBc/Hz@1MHz。
Since phase demodulation frequency is 50MHz, with local oscillator output signal at a distance of relatively closely, filter cannot inhibit well, therefore
The spurious signal for inhibiting VCO to generate by the way of loop filter.
Output signal required for the signal frequency multiplication that frequency multiplier generates a local oscillator CRO to a local oscillator module, then be input to
In first order frequency-variable module.Wherein the output signal of frequency multiplier is filtered using micro-strip hair clip filter, is reduced spuious.
Two local oscillator output signals are fixed point frequency, and reference signal 100MHz is passed through harmonic oscillator, amplifier and filtering
Device realizes the output of two local oscillation signals.Since two local oscillator noises are much better than a local oscillator noise, last intermediate frequency is defeated
Phase noise depends primarily on the phase noise coefficient of radiofrequency signal and a local oscillation signal out.
It is illustrated in figure 2 the frequency-variable module functional block diagram of the invention patent, the module is mainly by the radio frequency of upper frequency
Input is moved lower frequency intermediate frequency range by way of down coversion, mainly by frequency mixer (the first frequency mixer), filtering
The part such as device (the 4th filter, the 5th filter), amplifier (the 4th amplifier, the 5th amplifier) and attenuator forms.
Filter 1 (the 4th filter) uses MEMS filter, and free transmission range is mainly chosen for Ku frequency range input signal
Range has good inhibitory effect to image frequency.
Ku frequency range input signal is mixed by frequency mixer (the first frequency mixer) with a local oscillation signal, through (the 5th filtering of filter 2
Device), amplifier 1 (the 4th amplifier) exports first time down-conversion signal.
First time down-conversion signal carries out second with two local oscillation signals and is mixed, through filter (the 5th filter), amplification
Intermediate-freuqncy signal required for device (the 5th amplifier) output is final.
Fig. 3 show the control module functional block diagram of the invention patent, and control module is communicated by serial ports controller, carries out
Frequency control and state feedback, slave computer decode the instruction of host computer, and then the output of control logic controller is corresponding
Timing, to realize that the frequency of product controls and provides feedback information.
When a kind of above-mentioned Ku frequency range low-converter design method, frequency-variable module rf inputs and medium frequency output end are tested
Use detachable SMA-K connector.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of Ku frequency range low-converter, which is characterized in that the Ku frequency range low-converter include: local oscillator module, frequency-variable module and
Control module；Wherein, the local oscillator module receives reference signal, and the local oscillation signal of output is exported to the frequency-variable module,
The Ku frequency range radio-frequency input signals of input is converted to IF output signal by the frequency-variable module；The control module is connected to institute
Local oscillator module and frequency-variable module are stated, to carry out the control of frequency and the feedback of state.
2. Ku frequency range low-converter according to claim 1, which is characterized in that the local oscillator module includes: the first local oscillator
Module and the second local oscillator module, the reference signal are exported respectively by the first power splitter to the first local oscillator module and second
Local oscillator module, the first local oscillator module obtain a local oscillation signal using shock resistant lock same axis medium oscillating circuit；Described second
Local oscillator module obtains two local oscillation signals by fixed point frequency.
3. Ku frequency range low-converter according to claim 2, which is characterized in that the first local oscillator module includes successively connecting
Connect with lower component: phase discriminator, loop filter, a local oscillator CRO group, the second power splitter, the first amplifier, third power splitter,
Frequency multiplier and micro-strip hair clip filter；Wherein, an output end of the third power splitter is connected to the frequency multiplier, another
Output end is connected to the phase discriminator.
4. Ku frequency range low-converter according to claim 3, which is characterized in that the phase discriminator is that phase demodulation frequency is
The phase discriminator of 50MHz, and phase noise of the phase discriminator when maximum frequency point exports is -86dBc/Hz@100Hz, -95dBc/
Hz@1kHz, -103dBc/Hz@10kHz, -102dBc/Hz@100kHz and -115dBc/Hz@1MHz.
5. Ku frequency range low-converter according to claim 2, which is characterized in that the second local oscillator module includes successively connecting
Connect with lower component: the second amplifier, harmonic emissions device, first filter, second filter, third amplifier and third filtering
Device.
6. Ku frequency range low-converter according to claim 2, which is characterized in that the frequency-variable module includes: under first time
Frequency-variable module, the first time down conversion module is connected to the output end of the first local oscillator module, and Ku frequency range radio frequency is defeated
Enter signal and is mixed output first time down-conversion signal with a local oscillation signal；
Second of down conversion module, second of down conversion module are connected to the output end of second down conversion module, with
The first time down-conversion signal is mixed to output intermediate-freuqncy signal with two local oscillation signal.
7. Ku frequency range low-converter according to claim 6, which is characterized in that the first time down conversion module include according to
Secondary connection with lower component: the 4th amplifier, the 4th filter, the first frequency mixer, the 5th filter, the 5th amplifier and decaying
Device；Wherein, the input terminal of first frequency mixer is also connected with a local oscillation signal.
8. Ku frequency range low-converter according to claim 6, which is characterized in that second of down conversion module include according to
Secondary connection with lower component: the second frequency mixer, the 6th filter, the second attenuator, the 6th amplifier, third attenuator, the 7th
Amplifier, high-pass filter, the 4th power splitter and low-pass filter；The power splitter exports IF output signal.
9. Ku frequency range low-converter according to claim 1, which is characterized in that the control module is connected to by serial ports
The local oscillator module and frequency-variable module.
10. Ku frequency range low-converter according to claim 7, which is characterized in that the 4th filter and the 5th filtering
Device is MEMS filter；The loop filter, first filter, second filter, third filter, the 6th filter, height
Bandpass filter and low-pass filter are microstrip filter.
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| CN111220847A (en) * | 2019-05-21 | 2020-06-02 | 一诺仪器（中国）有限公司 | Frequency conversion system and spectrum analyzer |
| CN111474507A (en) * | 2020-04-10 | 2020-07-31 | 电子科技大学 | Special multichannel radio frequency echo signal down converter of MR-EPT spectrometer |
| CN111953304A (en) * | 2020-07-30 | 2020-11-17 | 华中科技大学 | Front-end signal synthesis module for accelerator low-level control system |
| CN112187296A (en) * | 2020-09-08 | 2021-01-05 | 广州程星通信科技有限公司 | Frequency synthesis mobile-based Ka frequency band transmitter and implementation method thereof |
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| CN112187296A (en) * | 2020-09-08 | 2021-01-05 | 广州程星通信科技有限公司 | Frequency synthesis mobile-based Ka frequency band transmitter and implementation method thereof |
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