CN205283531U - Channel is advanced in mini -series L, broadband small step of S frequency channel - Google Patents
Channel is advanced in mini -series L, broadband small step of S frequency channel Download PDFInfo
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- CN205283531U CN205283531U CN201520973722.5U CN201520973722U CN205283531U CN 205283531 U CN205283531 U CN 205283531U CN 201520973722 U CN201520973722 U CN 201520973722U CN 205283531 U CN205283531 U CN 205283531U
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Abstract
The utility model provides a channel is advanced in mini -series L, broadband small step of S frequency channel frequency conversion channel, high local oscillator, how many parts such as low local oscillator, reference source and control comprises. Adopt module frequency conversion channel seriation planning, broadband small step to advance hypophase technique of making an uproar and miniaturized electromagnetic compatibility designing technique. The miniaturized module series frequency conversion channel product of standard can according to actual need is nimble disposes, will have more wide application prospect in the observing and controlling field.
Description
Technical field
The utility model relates to a kind of novel little stepping channel in small-sized seriation L, S frequency range broadband, belongs to radio frequency electrical road technique field.
Background technology
Frequency transformer is as an important component part of TT&C system, and its performance and volume directly determine performance and the portability of TT&C system. Along with improving constantly of system demand and performance requriements, the module frequency transformer demand of high performance index, miniaturization, low-power consumption increases day by day. As gordian technique deposit, the development of the module frequency transformer of high-performance, miniaturization, low-power consumption is imperative.
Channel is the important component part of frequency transformer module, will meet TT&C system demand, suppresses for improving image frequency, reduces combination frequency component in band, usually adopts twice frequency conversion scheme. Prior art high local oscillator produces little stepping, the programme that low local oscillator is fixing, require that high local oscillator is frequently combined to produce little stepping and can cover relatively wide bandwidth again, thus can only use the phase-locked circuit of many rings mixing of the DDS+PLL of more complicated, wherein DDS, frequency divider, frequency mixer all can introduce undesirable frequency component, and spurious reduction is difficult to accomplish. In prior art, twice frequency conversion adopts the little stepping of high local oscillator, the frequency conversion mode that low vibration frequency is fixing, and in up-conversion and down coversion device, corresponding vibration frequency is also inconsistent, cause respective filter in channel cannot unify and complex structure, it is difficult to realize the miniaturization of volume.
Practical novel content
The problem that the utility model solves is: overcome the deficiencies in the prior art, propose the little stepping channel in a kind of small-sized seriation L, S frequency range broadband, solve the technical problems such as module frequency conversion channel seriation planning, the little stepping Low phase noise technology in broadband and miniaturization EMC Design.
Technical solution of the present utility model is:
The little stepping channel in a kind of small-sized seriation L, S frequency range broadband, comprising: frequency conversion channel, low local oscillator, high local oscillator, crystal oscillator and reference handover module, control module, power supply module;
Crystal oscillator and reference handover module are low local oscillator and high local oscillator offer reference signal, low local oscillator is according to the reference signal received, under the control of control module, for frequency conversion channel provides low local oscillation signal, high local oscillator is according to the reference signal received, under the control of control module, for frequency conversion channel provides high local oscillation signal, control module control crystal oscillator and the reference signal exported with reference to handover module come from crystal oscillator and the inner crystal oscillator of reference handover module or come from crystal oscillator and the External Reference signal with reference to the input of handover module outside; Control module control power supply module is frequency conversion channel, low local oscillator, high local oscillator and crystal oscillator and powers with reference to handover module;
After frequency conversion channel receives low local oscillation signal and high local oscillation signal, the input signal carrying out frequency conversion that needs of outside input is carried out down-converted or upconversion process, signal after process exports, meanwhile, frequency conversion channel also exports monitor signal for whether monitoring has frequency variation signal to export.
Described frequency conversion channel comprises single-conversion module, single-conversion filtering module, two frequency-variable modules, two variable-frequency filtering modules and radio frequency amplification filtering module;
When input signal is carried out up-conversion by frequency conversion channel, input signal is first by the clutter of two variable-frequency filtering module filtering input signals, send in two frequency-variable modules, two times frequency-variable module receives described low local oscillation signal, input signal after filtering clutter is carried out up-conversion, signal after up-conversion carries out filtering again by single-conversion filtering module, send into single-conversion module, single-conversion module receives high local oscillation signal, and the signal that single-conversion filtering module exports is carried out up-conversion, finally undertaken by radio frequency amplification filtering module amplifying and exporting after filtering again,
When input signal is carried out down coversion by frequency conversion channel, input signal first is undertaken amplifying and filtering by radio frequency amplification filtering module, the clutter of filtering input signal, send in single-conversion module, single-conversion module receives described high local oscillation signal, input signal after filtering clutter is carried out down coversion, signal after down coversion carries out filtering again by single-conversion filtering module, send into two frequency-variable modules, two times frequency-variable module receives low local oscillation signal, and the signal of two variable-frequency filtering module outputs is carried out down coversion, export after finally carrying out filtering by two variable-frequency filtering modules again.
Described low local oscillator is that the little stepping of low frequency and narrow bandwidth is combined frequently, bandwidth 5MHz, stepping 1Hz.
Described high local oscillator is that S frequency range is combined frequently, and bandwidth is 100MHz or 200MHz, stepping 5MHz.
The input signal of described frequency conversion channel is intermediate frequency signal, and the output signal of frequency conversion channel is L frequency band signals or S frequency band signals
The utility model useful effect compared with prior art is:
(1) the utility model by by described frequency conversion channel, low local oscillator, high local oscillator, crystal oscillator and with reference to switching, control part, power supply process be integrated in same structure. And it is configured with channel switch, possesses the switching of interior External Reference and self-checking function, it is to increase the handiness of system configuration, it is achieved that the compact radio frequency channel of little stepping, Low phase noise, transmitting-receiving compatibility simultaneously; The utility model can cover the range of frequency of L, S simultaneously, compared to existing technology, has less frequency step, reaches 1Hz, can adapt to the demand of various observing and controlling application. Possess the features such as miniaturization, low spurious, Low phase noise, low group delay fluctuation.
(2) high local oscillator is set to big stepping by the utility model, and low local oscillator adopts fractional frequency division phase-locked, the two linkage, it is achieved the little stepping height in broadband is made an uproar the frequency conversion function of index mutually. This kind of planning can make two local oscillators all adopt single loop phase locked loop, enormously simplify system architecture, have effectively achieved the high-performance of product and miniaturization. Phase place noise can reach: phase place noise��-70dBc/Hz100Hz; Phase place noise��-90dBc/Hz1kHz; Phase place noise��-92dBc/Hz10kHz.
(3) the utility model is for noise figure index optimization design, adopt low-noise factor technology, and to system noise coefficient most critical device--noise figure and the standing wave index of amplifier reasonably balance choice, the index of system noise coefficient��5dB can be realized, meet the requirement of existing high accuracy measurement and control system.
(4) the utility model realizes miniaturization Design, compares currently available products, it is possible to the various different applied environment of flexible adaptation more, and versatility is stronger, and reliability is higher, and holistic cost is lower.
Accompanying drawing explanation
Fig. 1 is the utility model frequency convertor system block diagram;
Fig. 2 is the utility model frequency conversion channel functional block diagram;
Fig. 3 is the utility model frequency transformer point chamber schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is further described in detail.
As shown in Figure 1, the little stepping channel in a kind of small-sized seriation L, S frequency range broadband, comprising: frequency conversion channel, low local oscillator, high local oscillator, crystal oscillator and reference handover module, control module, power supply module;
Crystal oscillator and reference handover module are low local oscillator and high local oscillator offer reference signal, low local oscillator is according to the reference signal received, under the control of control module, for frequency conversion channel provides low local oscillation signal, high local oscillator is according to the reference signal received, under the control of control module, for frequency conversion channel provides high local oscillation signal, control module control crystal oscillator and the reference signal exported with reference to handover module come from crystal oscillator and the inner crystal oscillator of reference handover module or come from crystal oscillator and the External Reference signal with reference to the input of handover module outside; Control module control power supply module is frequency conversion channel, low local oscillator, high local oscillator and crystal oscillator and powers with reference to handover module;
After frequency conversion channel receives low local oscillation signal and high local oscillation signal, the input signal carrying out frequency conversion that needs of outside input is carried out down-converted or upconversion process, signal after process exports, simultaneously, frequency conversion channel also exports monitor signal, for whether monitoring has frequency variation signal to export.
As shown in Figure 2, frequency conversion channel comprises up-convert channel and down coversion channel, and up-convert channel and down coversion channel include single-conversion module, single-conversion filtering module, two frequency-variable modules, two variable-frequency filtering modules and radio frequency amplification filtering module; Described frequency conversion layout can compatible upper and lower frequency conversion function, it is only necessary to the device signal transmission direction in change channel strip (radio frequency amplification filtering, single-conversion, single-conversion filtering, two frequency conversions, two variable-frequency filterings).
When input signal is carried out up-conversion by frequency conversion channel, input signal is first by the clutter of two variable-frequency filtering module filtering input signals, send in two frequency-variable modules, two times frequency-variable module receives described low local oscillation signal, input signal after filtering clutter is carried out up-conversion, signal after up-conversion carries out filtering again by single-conversion filtering module, send into single-conversion module, single-conversion module receives high local oscillation signal, and the signal that single-conversion filtering module exports is carried out up-conversion, finally undertaken by radio frequency amplification filtering module amplifying and exporting after filtering again,
When input signal is carried out down coversion by frequency conversion channel, input signal first is undertaken amplifying and filtering by radio frequency amplification filtering module, the clutter of filtering input signal, send in single-conversion module, single-conversion module receives described high local oscillation signal, input signal after filtering clutter is carried out down coversion, signal after down coversion carries out filtering again by single-conversion filtering module, send into two frequency-variable modules, two times frequency-variable module receives low local oscillation signal, and the signal of two variable-frequency filtering module outputs is carried out down coversion, export after finally carrying out filtering by two variable-frequency filtering modules again.
Two times frequency conversion, single-conversion adopt frequency mixer ADEX-10L, HMC213MS8 to realize respectively.
Radio frequency amplification filtering module adopts cavity body filter to realize.
Two variable-frequency filtering module, single-conversion filtering adopt self-designed L C wave filter to realize.
The compatible up-convert channel of frequency conversion channel and down coversion channel realize up-conversion and the down coversion of L, S signal respectively, and the two all adopts twice frequency conversion scheme, and the discrepancy in elevation is all selected in twice frequency conversion, is inverted problem without frequency spectrum. Low local oscillator is that the little stepping Low phase noise of low frequency and narrow bandwidth is combined frequently, bandwidth 5MHz, stepping 1Hz. In order to reduce device kind, simplified design, in upper and lower frequency transformer module, low local oscillator gets unified value. The low local oscillator of the utility model adopts the direct phase-locked output of fractional frequency division phase sensitive rectifier, and its advantage does not have decimal stepping spuious. Maximum spuious point is: the difference exporting frequency and phase demodulation frequency integral multiple. So frequency must be exported choose reasonable so that it is with the difference of phase demodulation frequency integral multiple beyond loop bandwidth, when choose reasonable exports frequency, loop bandwidth, spurious reduction can accomplish more than 65dB. The employing of Fractional Frequency-Dividing Technology, solve the contradiction between high phase comparison frequency and fractional frequency interval in monocycle digital frequency synthesize device, and compare with the multi-loop digital frequency synthesizer of frequency interval with identical operating frequency, there is simple and reliable remarkable advantage, have effectively achieved the high-performance of product and miniaturization.
High local oscillator is that S frequency range is combined frequently, adopts phase sensitive rectifier ADF4106 to realize, bandwidth 100MHz (200MHz), stepping 5MHz, and two local oscillator linkages realize the frequency coverage of 100MHz (200MHz) bandwidth, 1Hz stepping. Miniaturization frequency transformer, calculated by combination frequency and choose this suitable vibration frequency, low vibration frequency of L, S frequency range is consistent, simultaneously by link is carried out rational cavity design, guarantee that Up/Down Conversion inside modules structure is basically identical, realize only replacing radio-frequency filter, the VCO of high local oscillator and adjusting corresponding loop parameter, meet the demand of L, S two kinds of frequency range compatibilities.
As shown in Figure 3, described frequency conversion channel, low local oscillator, high local oscillator, crystal oscillator and with reference to switching, control part, power supply process be integrated in same structure.
Crystal oscillator and with reference to handover module and channel distribution in structure front, and to carry out point chamber be 5 parts, wherein 4 parts are channel strip, are respectively radio frequency amplification filtering, single-conversion, single-conversion filtering, two frequency conversions, two variable-frequency filterings, and another part is crystal oscillator and reference handover module; Low local oscillator, control part, high local oscillator are distributed in the structure back side, are divided into 3 cavitys.
By above embodiment, the utility model finally can be implemented in L, S range of frequency, spuious��-60dBm, the index of noise figure��5dB, and there is the feature of miniaturization, it is possible to meet the needs of all kinds of TT&C system, it is possible to flexible configuration according to actual needs. Concrete effect is as shown in table 1:
The utility model is through expert evaluation, and is applied in corresponding space flight model, and effect is good.
In the utility model, unspecified part belongs to general knowledge as well known to those skilled in the art.
Claims (5)
1. the little stepping channel in small-sized seriation L, S frequency range broadband, it is characterised in that comprising: frequency conversion channel, low local oscillator, high local oscillator, crystal oscillator and reference handover module, control module, power supply module;
Crystal oscillator and reference handover module are low local oscillator and high local oscillator offer reference signal, low local oscillator is according to the reference signal received, under the control of control module, for frequency conversion channel provides low local oscillation signal, high local oscillator is according to the reference signal received, under the control of control module, for frequency conversion channel provides high local oscillation signal, control module control crystal oscillator and the reference signal exported with reference to handover module come from crystal oscillator and the inner crystal oscillator of reference handover module or come from crystal oscillator and the External Reference signal with reference to the input of handover module outside; Control module control power supply module is frequency conversion channel, low local oscillator, high local oscillator and crystal oscillator and powers with reference to handover module;
After frequency conversion channel receives low local oscillation signal and high local oscillation signal, the input signal carrying out frequency conversion that needs of outside input is carried out down-converted or upconversion process, signal after process exports, meanwhile, frequency conversion channel also exports monitor signal for whether monitoring has frequency variation signal to export.
2. the little stepping channel in one according to claim 1 small-sized seriation L, S frequency range broadband, it is characterized in that: described frequency conversion channel comprises up-convert channel and down coversion channel, up-convert channel and down coversion channel include single-conversion module, single-conversion filtering module, two frequency-variable modules, two variable-frequency filtering modules and radio frequency amplification filtering module;
When input signal is carried out up-conversion by frequency conversion channel, input signal is first by the clutter of two variable-frequency filtering module filtering input signals, send in two frequency-variable modules, two times frequency-variable module receives described low local oscillation signal, input signal after filtering clutter is carried out up-conversion, signal after up-conversion carries out filtering again by single-conversion filtering module, send into single-conversion module, single-conversion module receives high local oscillation signal, and the signal that single-conversion filtering module exports is carried out up-conversion, finally undertaken by radio frequency amplification filtering module amplifying and exporting after filtering again,
When input signal is carried out down coversion by frequency conversion channel, input signal first is undertaken amplifying and filtering by radio frequency amplification filtering module, the clutter of filtering input signal, send in single-conversion module, single-conversion module receives described high local oscillation signal, input signal after filtering clutter is carried out down coversion, signal after down coversion carries out filtering again by single-conversion filtering module, send into two frequency-variable modules, two times frequency-variable module receives low local oscillation signal, and the signal of two variable-frequency filtering module outputs is carried out down coversion, export after finally carrying out filtering by two variable-frequency filtering modules again.
3. the little stepping channel in one according to claim 1 and 2 small-sized seriation L, S frequency range broadband, it is characterised in that: described low local oscillator is that the little stepping of low frequency and narrow bandwidth is combined frequently, bandwidth 5MHz, stepping 1Hz.
4. the little stepping channel in one according to claim 1 and 2 small-sized seriation L, S frequency range broadband, it is characterised in that: described high local oscillator is that S frequency range is combined frequently, and bandwidth is 100MHz or 200MHz, stepping 5MHz.
5. the little stepping channel in one according to claim 1 and 2 small-sized seriation L, S frequency range broadband, it is characterised in that: the input signal of described frequency conversion channel is intermediate frequency signal, and the output signal of frequency conversion channel is L frequency band signals or S frequency band signals.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994919A (en) * | 2017-12-22 | 2018-05-04 | 航天恒星科技有限公司 | Up-converter circuit based on duplexer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107994919A (en) * | 2017-12-22 | 2018-05-04 | 航天恒星科技有限公司 | Up-converter circuit based on duplexer |
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