CN102843159A - Microwave hyperspectral receiver and method - Google Patents
Microwave hyperspectral receiver and method Download PDFInfo
- Publication number
- CN102843159A CN102843159A CN2012102986590A CN201210298659A CN102843159A CN 102843159 A CN102843159 A CN 102843159A CN 2012102986590 A CN2012102986590 A CN 2012102986590A CN 201210298659 A CN201210298659 A CN 201210298659A CN 102843159 A CN102843159 A CN 102843159A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- module
- microwave
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Superheterodyne Receivers (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The invention provides a microwave hyperspectral receiver and a method. The microwave hyperspectral receiver comprises a primary receiving device and a secondary receiving device, wherein the primary receiving device is used for receiving high-frequency signals input by an antenna, carrying out frequency band division on the high-frequency signals, carrying out down-conversion on the high-frequency signals subjected to frequency band division to form first intermediate-frequency signals and amplifying and outputting the first intermediate-frequency signals to the second receiving device; and the second receiving device is used for receiving the amplified first intermediate-frequency signals, carrying out equipower division on the first intermediate-frequency signals to form multiple intermediate-frequency signals, carrying out frequency band division and square rate detection in sequence on each path of intermediate-frequency signals in the multiple intermediate-frequency signals to obtain voltage signals with sky brightness temperature information and amplifying and outputting the voltage signals. According to the invention, two stages of receiving units which are of a cascaded structure are adopted, and the frequency band division of the first receiving device is implemented serially according to the time sequence, therefore the system complexity is reduced; and the frequency band division of the second receiving device is implemented in parallel, therefore the system scanning time is shortened.
Description
Technical field
The present invention relates to the weather monitoring field, relate in particular to the high spectrum Receiving machine and method of a kind of microwave.
Background technology
Aspect weather monitoring, traditional multi-channel microwave radiometer is selected superheterodyne receiver and these two kinds of receiver structures of array acceptor for use.Superheterodyne receiver is down-converted to the low frequency processing with the high-frequency signal of antenna output, and carries out frequency range through the mode of tuning local frequency and divide; Array acceptor then directly carries out merit branch, Filtering Processing to antenna output signal, accomplishes frequency range and divides.The high spectral radiometer of microwave need obtain atmospheric radiation spectral line continuous in the working frequency range, and the port number of receiver reaches more than 100.If select the superheterodyne receiver structure for use; The mode of employing down-conversion will receive signal and downconvert to zero intermediate frequency; Adopt a fixing required bandwidth of low pass filter leaching then; The signal frequency that frequency synthesizer is launched is depended in the selection of frequency range, because frequency synthesizer can only be launched a signal frequency at the same time, so this frequency range dividing mode need be accomplished the process of down-conversion in chronological order; Just cause the increase of system scan time, be unfavorable for observing Changes in weather fast; If select the array acceptor structure for use; Array acceptor will receive the signal merit and divide to multichannel, adopt the required frequency band of a plurality of band pass filter group leaching then, and the frequency response of band pass filter group is depended in the selection of frequency range; Carry out work simultaneously owing to receive signal merit branch to a plurality of band pass filter groups; So this frequency range dividing mode is parallel to accomplish the process that frequency range is divided, yet the quantity of band pass filter group equals the number of channels of receiver, so when the receiver channel number is many; The complexity of system also rises thereupon, is unfavorable for the development and the delivery of microwave radiometer.
Therefore, how reducing the sweep time of reception and the complexity of reduction receiving system is the problem that needs solve.
Summary of the invention
In view of this, the present invention provides a kind of microwave high spectrum Receiving machine and method, to reduce the complexity of system scan time and system.
For addressing the above problem, the technical scheme that the embodiment of the invention provides is following:
On the one hand, the present invention provides a kind of microwave high spectrum receiver, comprises one-level receiving system and secondary receiving system, wherein,
Said one-level receiving system; The high-frequency signal that is used for the reception antenna input; Said high-frequency signal is carried out frequency range divide, and the said high-frequency signal of frequency range division is down-converted to first intermediate-freuqncy signal, amplify said first intermediate-freuqncy signal of output to said secondary receiving system;
Said secondary receiving system; Be used to receive said first intermediate-freuqncy signal after the amplification; The said first intermediate-freuqncy signal constant power is divided into the multichannel intermediate-freuqncy signal; And the every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, amplify and export said voltage signal.
Optional, said one-level receiving system comprises: high frequency amplifying module, mirror image noise filtering module, down conversion module and intermediate frequency amplification module, wherein,
Said high frequency amplifying module is used for the high-frequency signal of reception antenna input, amplifies and exports said high-frequency signal;
Said mirror image noise filtering module is used for the extra noise component that high frequency amplifying module produces is carried out filtering; High-frequency signal to exporting to down conversion module carries out pre-filtering, suppresses the mirror image noise; And receive the control signal that down conversion module is sent, control said high-frequency signal according to said control signal and export in the corresponding cavity body filter;
Said down conversion module; Be used to receive the high-frequency signal after the pre-filtering of said mirror image noise filtering module, said high-frequency signal is carried out frequency range divide, and the said high-frequency signal that frequency range is divided carry out down-converted; Obtain first intermediate-freuqncy signal, export said first intermediate-freuqncy signal;
Said intermediate frequency amplification module is used for receiving and amplifying said first intermediate-freuqncy signal, exports first intermediate-freuqncy signal to the said secondary receiving system of said amplification.
Optional, said high frequency amplifying module comprises Waveguide coaxial transition components and high frequency low noise amplifier;
Said Waveguide coaxial transition components is used for converting the Waveguide interface of said reception antenna into coaxial interface;
Said high frequency low noise amplifier is used to amplify the high-frequency signal through said coaxial interface reception antenna input.
Optional; Said mirror image noise filtering module comprises: first microwave switch, second microwave switch, and a plurality of multistage band pass filter, wherein; One end of each multistage band pass filter is connected with first microwave switch; The other end is connected with second microwave switch, and said first microwave switch also is connected with frequency synthesizer with high frequency amplifying module, said second microwave switch also with down conversion module in low-converter be connected with frequency synthesizer; The Kai Heguan of first microwave switch, and the Kai Heguan of second microwave switch receive the control of the control signal of said frequency synthesizer output.
Optional, said down conversion module comprises: frequency synthesizer and low-converter, wherein,
Said frequency synthesizer is used to generate the local oscillation signal of different frequency, and exports said local oscillation signal and give said low-converter; And the generation control signal, export said control signal to said mirror image noise filtering module;
Said low-converter is used for carrying out down-converted according to the high-frequency signal that said local oscillation signal is exported said high frequency amplifying module, obtains first intermediate-freuqncy signal, and said first intermediate-freuqncy signal is exported to the intermediate frequency amplification module.
Optional, said frequency synthesizer comprises: lock phase module and frequency multiplication module; Wherein,
Said lock phase module is used for reference frequency frequency multiplication to the intermediate frequency frequency range that the reference frequency source with low frequency provides;
Said frequency multiplication module is used for the required output frequency according to frequency synthesizer, chooses low frequency frequency multiplication path or high frequency frequency multiplication path according to said reference frequency, and the local oscillation signal of pre-set bandwidths is satisfied in output.
Optional, said lock phase module comprises: reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, wherein,
Said reference frequency source is used to provide the reference frequency of standard;
Said digital frequency divider is used to provide different frequency dividing ratios, and the reference frequency that provides with said reference frequency source is a frequency step, the output frequency of the said voltage controlled oscillator of control under said phase discriminator cooperates.
Optional, said frequency multiplication module comprises: first varactor doubler, first single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT), first band pass filter, second varactor doubler, second band pass filter, this vibration magnifier and low pass filter; Wherein, said first band pass filter and second varactor doubler form high frequency frequency multiplication path, and the logical frequency multiplier of second band forms low frequency frequency multiplication path, wherein,
Said first varactor doubler is used for the output signal of said lock phase module is carried out frequency multiplication;
Said first single-pole double-throw switch (SPDT), the signal that is used to control said first varactor doubler output exports said first band pass filter or second band pass filter to;
Said first band pass filter is used for the low frequency signal that leaching receives signal, and exports said low frequency signal to said second varactor doubler;
Said second varactor doubler carries out exporting said second single-pole double-throw switch (SPDT) to after the frequency multiplication to the low frequency signal that receives;
Said second band pass filter is used for the high-frequency signal that the said lock phase module of leaching is exported, and exports said high-frequency signal to said second single-pole double-throw switch (SPDT);
Said second single-pole double-throw switch (SPDT) is used to control the signal of said second varactor doubler transmission or the signal of said second band pass filter transmission exports this vibration magnifier to;
Said vibration magnifier is used to receive and amplify the local oscillation signal of said second single-pole double-throw switch (SPDT) input;
Said first low pass filter is used for the extra noise component that leaching said low frequency frequency multiplication path or high frequency frequency multiplication path are produced, and the output local oscillation signal is to said low-converter.
Optional, optional, said intermediate frequency amplification module comprises the intermediate frequency low noise amplifier and second low pass filter;
Said intermediate frequency low noise amplifier is used to amplify the intermediate-freuqncy signal by said down conversion module output;
Said second low pass filter is used to filter the extra noise component that said intermediate frequency low noise amplifier produces.
Optional, said secondary receiving system comprises:
The merit sub-module is used for the first intermediate-freuqncy signal constant power of one-level receiving system output is divided into the multichannel intermediate-freuqncy signal, and exports said multichannel intermediate-freuqncy signal to cavity filtration module group through multiplexer channel;
Cavity filtration module group is used for that the every road intermediate-freuqncy signal that receives is carried out frequency range and divides, and exports the intermediate-freuqncy signal after the frequency range division to square law detection module groups;
Square law detection module groups is used for the every road intermediate-freuqncy signal that receives after frequency range is divided is carried out the square law detection, and control output has the bandwidth of the voltage signal of the bright temperature information of sky;
The video amplification module be used for the voltage signal that receives the output of square law detection module groups is amplified, and the voltage signal after will amplifying exports the weather information harvester to.
Optional, said cavity filtration module group comprises a plurality of cavity body filters, each cavity body filter is seven rank elliptic cavity fluid filters;
Said square law detection module groups comprises a plurality of wave detectors, and each wave detector is a diode detector; Wherein, the number of said cavity body filter and wave detector is identical;
Said video amplification module comprises: the two-stage calculation amplifier of cascade.
Accordingly, the present invention also provides a kind of microwave high spectrum method of reseptance, and said method comprises:
The high-frequency signal of reception antenna input;
Said high-frequency signal is carried out frequency range to be divided;
Said high-frequency signal after the frequency range division is down-converted to first intermediate-freuqncy signal, amplify said first intermediate-freuqncy signal;
The said first intermediate-freuqncy signal constant power after amplifying is divided into the multichannel intermediate-freuqncy signal;
Every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal is carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, and amplify the said voltage signal of output.
Optional, said said high-frequency signal after frequency range is divided down-converts to first intermediate-freuqncy signal and comprises:
Generate local oscillation signal;
The said high-frequency signal of said frequency range being divided according to said local oscillation signal carries out down-converted, obtains first intermediate-freuqncy signal.
Can be known that by technique scheme high spectrum receiving system of microwave provided by the present invention and method adopt the two-stage cascade structure, first order receiving system frequency range is divided serial in chronological order and is realized, has reduced the complexity of system; Second level receiving system frequency range is divided Parallel Implementation simultaneously, has reduced the system scan time.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use among the embodiment below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is first structural representation of the high spectrum receiver of a kind of microwave provided by the invention;
Fig. 2 is second structural representation of the high spectrum receiver of a kind of microwave provided by the invention;
Fig. 3 is the theory structure sketch map of the high spectrum receiving system of a kind of microwave provided by the invention;
Fig. 4 is the theory structure sketch map of a kind of frequency synthesizer provided by the invention;
Fig. 5 is the flow chart of the high spectrum receiver of a kind of microwave provided by the invention method.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, complete description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
See also Fig. 1, the structural representation of the high spectrum receiver of a kind of microwave that provides for the embodiment of the invention, said device comprises: one-level receiving system 11 and secondary receiving system 12, wherein,
Said one-level receiving system 11; The high-frequency signal that is used for the reception antenna input; Said high-frequency signal is carried out frequency range divide, and the said high-frequency signal of frequency range division is down-converted to first intermediate-freuqncy signal, amplify said first intermediate-freuqncy signal of output to said secondary receiving system;
Said secondary receiving system 12; Be used to receive said first intermediate-freuqncy signal after said one-level receiving system 11 amplifies; The said first intermediate-freuqncy signal constant power is divided into the multichannel intermediate-freuqncy signal; And the every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, amplify and export said voltage signal.
Optional; The high spectrum receiver of said microwave can be for the microwave that is used for the high spectral radiometer of microwave high spectrum receiver; That is to say, the multichannel microwave receiver that the high spectrum receiver of said microwave is a kind of two-stage cascade structure, and said first order receiving system, secondary receiving system are respectively one-level receiver and secondary receiver; Wherein, The mechanism of said one-level receiver can be the superheterodyne receiver structure, and the module that its one-level receiver specifically comprises is as shown in Figure 2, and said secondary receiver can be an array acceptor; It utilizes a plurality of band pass filter groups that the direct leaching of above-mentioned medium-frequency band is gone out corresponding band, for example the centre frequency of 10 frequency ranges in the below table 7.It module that comprises is also as shown in Figure 2.
See also Fig. 2; Second structural representation for the high spectrum receiver of a kind of microwave provided by the invention; In this embodiment, said one-level receiving system 11 comprises: high frequency amplifying module 111, mirror image noise filtering module 112, down conversion module 113 and intermediate frequency amplification module 114; Said secondary receiver 12 comprises: merit sub-module 121, and cavity filtration module group 122, square law detection module groups 123 and video amplification module 124, wherein,
Said high frequency amplifying module 111 is used for the high-frequency signal of reception antenna input, amplifies and exports said high-frequency signal; Wherein, said high frequency amplifying module comprises Waveguide coaxial transition components and high frequency low noise amplifier; Said Waveguide coaxial transition components is used for converting the Waveguide interface of said reception antenna into coaxial interface; Said high frequency low noise amplifier is used to amplify the high-frequency signal through said coaxial interface reception antenna input.
Said mirror image noise filtering module 112 is used for the extra noise component that high frequency amplifying module produces is carried out filtering; High-frequency signal to exporting to down conversion module carries out pre-filtering, suppresses the mirror image noise; And receive the control signal that down conversion module 113 (such as the frequency synthesizer in the down conversion module) is sent, control said high-frequency signal according to said control signal and export in the corresponding cavity body filter;
Wherein, Said mirror image noise filtering module can comprise: first microwave switch, second microwave switch, and a plurality of multistage band pass filter, wherein; One end of each multistage band pass filter is connected with first microwave switch; The other end is connected with second microwave switch, and said first microwave switch also is connected with frequency synthesizer with high frequency amplifying module, said second microwave switch also with down conversion module in low-converter be connected with frequency synthesizer; The Kai Heguan of first microwave switch, and the Kai Heguan of second microwave switch receive the control of the control signal of said frequency synthesizer output;
Said down conversion module 113; Be used to receive the high-frequency signal after the pre-filtering of said mirror image noise filtering module, said high-frequency signal is carried out frequency range divide, and the said high-frequency signal that frequency range is divided carry out down-converted; Obtain first intermediate-freuqncy signal, export said first intermediate-freuqncy signal.
Wherein, said down conversion module comprises: frequency synthesizer and low-converter, and said frequency synthesizer is used to generate the local oscillation signal of different frequency, and exports said local oscillation signal and give said low-converter; And the generation control signal, export said control signal to said mirror image noise filtering module; Said low-converter is used for carrying out down-converted according to the high-frequency signal that said local oscillation signal is exported said high frequency amplifying module, obtains first intermediate-freuqncy signal, and said first intermediate-freuqncy signal is exported to the intermediate frequency amplification module;
Said frequency synthesizer can comprise again: lock phase module and frequency multiplication module; Wherein, said lock phase module is used for reference frequency frequency multiplication to the intermediate frequency frequency range that the reference frequency source with low frequency provides; Said frequency multiplication module is used for the required output frequency according to frequency synthesizer, chooses low frequency frequency multiplication path or high frequency frequency multiplication path according to said reference frequency, and the local oscillation signal of pre-set bandwidths is satisfied in output;
Wherein, said lock phase module comprises: reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, and wherein, said reference frequency source is used to provide the reference frequency of standard; Said digital frequency divider is used to provide different frequency dividing ratios, and the reference frequency that provides with said reference frequency source is a frequency step, the output frequency of the said voltage controlled oscillator of control under said phase discriminator cooperates.
Wherein, said frequency multiplication module comprises: first varactor doubler, first single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT), first band pass filter, second varactor doubler, second band pass filter, this vibration magnifier and low pass filter; Wherein, said first band pass filter and second varactor doubler form high frequency frequency multiplication path, and the logical frequency multiplier of second band forms low frequency frequency multiplication path, and wherein, said first varactor doubler is used for the output signal of said lock phase module is carried out frequency multiplication; Said first single-pole double-throw switch (SPDT), the signal that is used to control said first varactor doubler output exports said first band pass filter or second band pass filter to; Said first band pass filter is used for the low frequency signal that leaching receives signal, and exports said low frequency signal to said second varactor doubler; Said second varactor doubler carries out exporting said second single-pole double-throw switch (SPDT) to after the frequency multiplication to the low frequency signal that receives; Said second band pass filter is used for the high-frequency signal that the said lock phase module of leaching is exported, and exports said high-frequency signal to said second single-pole double-throw switch (SPDT); Said second single-pole double-throw switch (SPDT) is used to control the signal of said second varactor doubler transmission or the signal of said second band pass filter transmission exports this vibration magnifier to; Said vibration magnifier is used to receive and amplify the local oscillation signal of said second single-pole double-throw switch (SPDT) input; Said first low pass filter is used for the extra noise component that leaching said low frequency frequency multiplication path or high frequency frequency multiplication path are produced, and the output local oscillation signal is to said low-converter.
Said intermediate frequency amplification module 114 is used for receiving and amplifying said first intermediate-freuqncy signal, exports first intermediate-freuqncy signal to the said secondary receiving system 12 of said amplification.Specifically comprise the intermediate frequency low noise amplifier and second low pass filter; Wherein, said intermediate frequency low noise amplifier is used to amplify the intermediate-freuqncy signal by said down conversion module output; Said second low pass filter is used to filter the extra noise component that said intermediate frequency low noise amplifier produces.
Optional, said cavity filtration module group can comprise a plurality of cavity body filters, each cavity body filter can be seven rank elliptic cavity fluid filters; Said square law detection module groups can comprise a plurality of wave detectors, and each wave detector is a diode detector; Said video amplification module can comprise: the two-stage calculation amplifier of cascade; But be not limited to this.
Optional, the number of said cavity body filter is identical with the number of wave detector, and each cavity body filter connects with corresponding wave detector.Certainly, the number of cavity body filter also can be different with the number of wave detector, and present embodiment does not limit.
Also see also Fig. 3; A kind of theory structure sketch map of the high spectrum receiver of a kind of microwave that provides for the embodiment of the invention, in this embodiment, the high spectrum receiver of said microwave comprises: one-level receiving system and secondary receiving system; Wherein, The one-level receiving system is an example with one-level receiver 31, and the secondary receiving system is an example with secondary receiver 32, but is not limited to this.
Wherein, The structure of said one-level receiver 31 can be the superheterodyne receiver structure; Be used for the faint high-frequency signal of antenna input is carried out the frequency range division; Then, the enough powerful intermediate-freuqncy signal that changes into that frequency range is divided the faint high-frequency signal in back, and said intermediate-freuqncy signal exported to secondary receiver 32.Said one-level receiver 31 specifically comprises: high frequency amplifying module 311, mirror image noise filtering module 312, down conversion module 313 and intermediate frequency amplification module 314.
The structure of said secondary receiver 32 is multichannel receiver array structures, comprises power splitter 321, cavity body filter group 322, square law geophone group 323 and video amplification module 324.That is to say; Be divided into different passages through the high-power intermediate-freuqncy signal of one-level receiver 31 output through after power splitter 321 and the cavity body filter group 322; After passing through square law geophone group 323 and video amplification module 324 then; Output has the voltage signal of the bright temperature information of sky and gives the AD acquisition module, so that the collection of AD acquisition module has the voltage signal of the bright temperature information of sky.
Wherein, In this embodiment; This high frequency amplifying module 311 can comprise Waveguide coaxial conversion and high frequency low noise amplifier, and said Waveguide coaxial conversion is made up of rectangular waveguide interface and coaxial interface, and the rectangular waveguide interface conversion that is used for reception antenna is the coaxial interface of one-level receiver; The high frequency low noise amplifier adopts the dual-stage amplifier cascade structure, and its high frequency amplifier circuit in low noise can be realized with the LNA chip, but be not limited to this.That is to say that high frequency amplifying module is used to receive and amplify the faint high-frequency signal (being ultra-weak electronic signal) of reception antenna output.
This mirror image noise filtering module 312 is used for the extra noise component that high frequency amplifying module 31 produces is carried out filtering; And the signal that will export to down conversion module 313 carried out pre-filtering, suppress the mirror image noise.Specifically comprise first microwave switch 3121, band pass filter group 3122 (comprising a plurality of band pass filters) and second microwave switch 3123.
Wherein, First microwave switch 3121 and high frequency amplifying module 311 are connected with each band pass filter in the band pass filter group 3122; Each band pass filter in the said band pass filter group 3122 also is connected with second microwave switch 3123, and second microwave switch 3123 is connected with intermediate frequency amplification module 314.In this embodiment, said band pass filter group 3122 (comprising a plurality of band pass filters) can adopt the microstrip filter structure, and type is 7 rank Chebyshev's band pass filters, but is not limited to this.
Said mirror image noise filtering module 312 is controlled the state of first microwave switch 3121 and/or second microwave switch 3123 through the control signal that the frequency synthesizer 3131 that receives in the down conversion module 313 sends, thereby high frequency amplifying module 311 output high-frequency signals can be got in the cavity body filter suitable in the secondary receiver 32.Wherein, said microwave switch can be the SP10T switch chip, certainly, also can be other chips with this function, and this instance does not limit.In this embodiment, the input/output interface between each device is coaxial interface.
In this embodiment; This down conversion module 313 is selected monolateral band down-conversion structure for use; Be used for that the high-frequency signal that high frequency amplifies 311 outputs of mould is carried out frequency range and divide, and the high-frequency signal of frequency range after dividing convert intermediate-freuqncy signal into, and intermediate-freuqncy signal is outputed in the intermediate frequency amplification module 314.Specifically comprise low-converter 3131 and frequency synthesizer 3132.
Wherein, said low-converter 3131 comprises double balanced mixer and band pass filter; Said double balanced mixer can the mixing chip; Band pass filter can adopt the LC filter construction, and its type is 5 rank Chebyshev's band pass filters, but is not limited to this.That is to say that the additional noise that low-converter 3131 is used for double balanced mixer is brought is carried out filtering; The local oscillation signal of treating mixed frequency signal and frequency synthesizer output that is input as high frequency amplifying module output of low-converter, the output intermediate-freuqncy signal is given intermediate frequency amplification module 314.
Among a kind of embodiment, said frequency synthesizer 3132 can comprise lock phase module and frequency multiplication module; Said frequency synthesizer 3132 is used to provide low-converter 3131 required local oscillation signal.
Wherein, said lock phase module adopts phase-locked loop structures, comprises reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, and the function of its each device and effect have been to know technology to those skilled in the art, repeat no more at this.The reference frequency that said reference frequency source can be provided by the temperature compensating crystal oscillator on the market; Digital frequency divider and phase discriminator are integrated in the AD4107 chip of certain (such as ADI company); Voltage controlled oscillator is selected HMC587LC4B model (the HMC587LC4B model of producing such as Hittite company etc.) for use.The output frequency of frequency synthesizer is adjusted through the frequency dividing ratio of digital frequency divider in the lock phase module, and frequency step equals the reference frequency of reference frequency source.The lock phase module is used for reference frequency frequency multiplication that the reference frequency source with low frequency provides to the intermediate frequency frequency range.
The frequency multiplication module adopts super large bandwidth two-way frequency multiplication structure, comprises first varactor doubler, first single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT), first band pass filter, second varactor doubler, second band pass filter, this vibration magnifier and low pass filter; Wherein, said first band pass filter and second varactor doubler form high frequency frequency multiplication path, and the logical frequency multiplier of second band forms low frequency frequency multiplication path, and its each functions of components and effect and connecting relation thereof see for details above-mentioned, repeat no more at this.
Said intermediate frequency amplification module 314 is made up of intermediate frequency low noise amplifier and low pass filter.The intermediate frequency low noise amplifier adopts the third stage amplifier cascade structure, and amplifier circuit is the LNA chip.Low pass filter adopts the LC filter construction, and type is 5 rank chebyshev low-pass filters, and it is used for the extra noise component that leaching intermediate frequency low noise amplifier is produced.The intermediate frequency amplification module is used to receive and amplify the intermediate-freuqncy signal of down conversion module output, exports to the secondary receiver then.
Wherein, Said power splitter 321 is used for the intermediate-freuqncy signal constant power of one-level receiver output is divided, and exports to the cavity body filter group, wherein; Power splitter 321 can adopt Wilkinson microstrip power divider structure, is made up of the microstrip line and the microwave resistance of Wilkinson structure.The manufacturing materials of microstrip line is a copper, is positioned on the AD1000 microwave sheet material; Microwave resistance is selected 50 ohm microwave resistance for use.
This cavity body filter group 322 (comprising a plurality of cavity body filters) is used for that the intermediate-freuqncy signal that receives is carried out frequency range and divides, and the intermediate-freuqncy signal after frequency range is divided is then exported to the square law geophone group.Wherein, This cavity body filter group 322 can adopt the cavity body filter structure, and type is the oval band pass filters in 7 rank, and cavity body filter comprises resonant cavity and tuning screw; Said resonant cavity is selected the coaxial cavity structure for use, and said tuning screw is processed with iron and fixed with conducting resinl.
This square law geophone group 323 (comprising a plurality of square law wave detectors) adopts the diode detection structure, utilizes the square law detection zone of diode, accomplishes the square law detection function under the small-signal.Specifically comprise detector diode, build-out resistor and video electric capacity.Wherein, said detector diode can adopt the zero offset Schottky diode structure, such as HSMS282K detector diode etc.Build-out resistor is connected in parallel on the detector diode front end, is used to realize the Broadband Matching of the square law input impedance of detector.Video electric capacity is connected in parallel on the detector diode rear end, is used for the bandwidth of control output voltage signal.Build-out resistor and video electric capacity adopt 50 ohm of microwave resistance and 100pF microwave capacitors etc., but are not limited to this.
This video amplification module 324 is used for voltage signal is amplified in the dynamic range of AD collection, so that AD gathers this voltage signal.Wherein, video amplification module 324 adopts the two-stage calculation amplifier cascade structures, and in order to guaranteeing enough big input impedance, thereby the voltage signal that the square law geophone group is exported can enter into the video amplification module fully.Said operational amplifier can be for the op777 chip etc., because the output voltage of square law geophone group is very little, so the video amplification module need be amplified to voltage signal in the dynamic range that AD gathers.
Can know that by the foregoing description among this embodiment, the one-level receiver selects for use the two-stage structure for amplifying to avoid the self-oscillation phenomenon under the high-gain.The one-level receiver carries out the frequency range rough segmentation first time through switching the output signal frequency of down conversion module medium frequency synthesizer, and frequency range is divided serial in chronological order and realized, has reduced system complexity; And the secondary receiver has been set up the linear relationship between atmospheric radiation power and the voltage signal through the square law geophone group, makes the two-point calibration of radiometer become possibility.Be that the secondary receiver carries out the frequency range segmentation second time through the cavity body filter group, frequency range is divided Parallel Implementation simultaneously, has reduced the sky Measuring Time.
Therefore, the embodiment of the invention has realized the passage division under the atmospheric radiation high spectrum resolution; Satisfied the requirement of lightweight, low-power consumption and low complex degree; And the requirement of measuring atmosphere fast.Further, the frequency synthesizer in the present embodiment has been realized the output of super large bandwidth frequency.
The technical indicator of the high spectrum receiver of a kind of microwave that the embodiment of the invention provides is as shown in table 1.
Table 1
| Receiver parameters | Technical indicator |
| Gain | >;80dB |
| Noise factor | <3.0dB |
| The linearity | >;0.9999 |
| Standard channel | 100 passages |
| Observation channel width | <80MHz |
| The full tunnel Measuring Time | < 0.1 second |
For the ease of those skilled in the art's understanding, first face will be an example with the high spectrum receiver of K band microwave, come to introduce in detail explanation technical scheme of the present invention.
The high spectrum receiver of K band microwave is a kind of K of being used for wave band.Receiver evenly is divided into 100 passages with 18～26GHz frequency range, through measuring the incident power of each passage respectively, sets up the linear relationship between atmospheric radiation power and the output voltage, provides the power spectral line of atmospheric radiation in 18～26GHz frequency range.
Optional, the microwave receiver of the high spectral radiometer of said microwave also can be called the microwave receiver unit of the high spectral radiometer of microwave.The high spectrum receiver unit of this microwave carries out frequency range control through connected digital processing and system control unit; This microwave receiver unit can be integrated in the constant temperature unit, is used to reduce the gain fluctuation of the high spectrum receiver unit of microwave, improves radiometer sensitivity.
The multichannel microwave receiver that the high spectrum receiver of K band microwave is a kind of two-stage cascade structure, the multichannel microwave receiver that the high spectrum receiver of K band microwave is a kind of two-stage cascade structure, first and second level is respectively one-level receiver and secondary receiver.The theory diagram of the high spectrum receiver of microwave is still consulted Fig. 3.
The structure of the described one-level receiver of present embodiment is the superheterodyne receiver structure, comprises high frequency amplifying module, mirror image noise filtering module, down conversion module and intermediate frequency amplification module, and the function of its each module and effect see for details above-mentioned, repeat no more at this.
Among this embodiment, high frequency amplifying module is made up of Waveguide coaxial conversion and high frequency low noise amplifier.The Waveguide coaxial conversion is made up of rectangular waveguide interface and coaxial interface, and the rectangular waveguide interface conversion that is used for reception antenna is the coaxial interface of receiver; The high frequency low noise amplifier adopts the dual-stage amplifier cascade structure, and amplifier circuit can be realized through the cha3689 chip.Gain based on cha3689 chip design single-stage amplifying circuit is 26dB, and the gain of high frequency amplifying module can reach 52dB.The frequency that high frequency amplifying module is used to receive reception antenna output is 18～26GHz, and power is less than the ultra-weak electronic signal of-130dBm, and power amplification is outputed to mirror image noise filtering module behind-78dBm.The technical indicator of high frequency amplifying module is as shown in table 2.
Table 2
| The high frequency amplifying module parameter | Technical indicator |
| Gain | >;50dB |
| Noise factor | <3.0dB |
| The power dynamic range | <2.0dB |
This mirror image noise filtering module comprises microwave switch and band pass filter; It is controlled (such as all corresponding microwave switch of the frequency of each frequency synthesizer the microwave switch state through the control signal that reception down conversion module frequency synthesizer sends; Have 10 frequencies altogether, so there is switch that 10 ports are arranged) thus make the output signal of high frequency amplifying module can get into suitable cavity body filter.Microwave switch can realize that switching time, input/output interface was coaxial interface less than 10ms based on the SP10T switch chip.The band pass filter group adopts the microstrip filter structure, and type is 7 rank Chebyshev's band pass filters, and bandwidth is 800MHz.The function of mirror image noise filtering module: be used for the extra noise component that high frequency amplifying module produces is carried out filtering; And the signal that will export to down conversion module carried out pre-filtering, suppress the mirror image noise.Shown in the following tabulation 3 of the technical indicator of mirror image noise filtering module.
Table 3
This down conversion module is selected monolateral band down-conversion structure for use, comprises low-converter and frequency synthesizer.
Wherein, said low-converter is made up of double balanced mixer and band pass filter.Double balanced mixer realizes that based on HMC292 mixing chip conversion loss is 8dB, and isolation is 36dB between radiofrequency signal and the local oscillation signal; Band pass filter adopts the LC filter construction, and type is 5 rank Chebyshev's band pass filters, and centre frequency is 2GHz, and bandwidth is 1GHz, and outer inhibition of band is 25dB.The additional noise that it is used for double balanced mixer is brought is carried out filtering.The local oscillation signal of treating mixed frequency signal and frequency synthesizer output that is input as high frequency amplifying module output of low-converter, the output intermediate-freuqncy signal is given the intermediate frequency amplification module.
Said frequency synthesizer comprises lock phase module and frequency multiplication module, and it is used to the local oscillation signal that provides low-converter required, and a kind of principle mechanism sketch map of its frequency synthesizer is as shown in Figure 4.
Among Fig. 4, said frequency synthesizer comprises: lock phase module 41 and frequency multiplication module 42, wherein, said lock phase module 41 adopts phase-locked loop structures, comprises reference frequency source 411, digital frequency divider 412, phase discriminator 413 and voltage controlled oscillator 414.Reference frequency source 411 can be a temperature compensating crystal oscillator, is used to provide reference frequency, and reference frequency is 20MHz; Said digital frequency divider 412 can be integrated in the AD4107 chip with phase discriminator 413; Said voltage controlled oscillator 414 is selected the HMC587LC4B model for use.The output frequency of frequency synthesizer is adjusted through the frequency dividing ratio of digital frequency divider in the lock phase module, and frequency step equals the reference frequency 20MHz of reference frequency source.The output frequency of frequency synthesizer is 5～10GHz, and the frequency hopping time is less than 10ms.The lock phase module is used for the reference frequency source frequency frequency multiplication of low frequency is arrived the intermediate frequency frequency range.
Said frequency multiplication module 42 adopts super large bandwidth two-way frequency multiplication structures, and said frequency multiplication module 42 comprises: first varactor doubler 421, first single-pole double-throw switch (SPDT) 422, first band pass filter 423, second varactor doubler 424, second band pass filter 425, second single-pole double-throw switch (SPDT) 426, this vibration magnifier 427 and low pass filter 428; Wherein, said first band pass filter 423 and second varactor doubler 424 form high frequency frequency multiplication path, and the second band passband bandpass filter forms low frequency frequency multiplication path.
Wherein, the output signal that first varactor doubler 421 at first will be locked phase module carries out frequency multiplication, realizes based on HMC573 frequency multiplication chip; First single-pole double-throw switch (SPDT) 422 and second single-pole double-throw switch (SPDT) 426 realize that based on the SP2T switch chip be used to choose suitable frequency path, switching time is less than 10ms respectively; Low frequency frequency multiplication path is got the high frequency parameter of lock phase module output through second band pass filter filter 425, and second band pass filter 425 can adopt the microstrip filter structure, and type is 3 rank Chebyshev's band pass filters, and passband is 18～20GHz; High frequency frequency multiplication path is through the low frequency parameter of first band pass filter, 423 leachings lock phase module output, and passband is 10～13GHz, realizes high frequency output through second varactor doubler 424 then, and output frequency is 20～26GHz.First band pass filter can adopt the microstrip filter structure, and type is 3 rank Chebyshev's band pass filters.The second varactor doubler circuit is realized based on HMC576 frequency multiplication chip; Low pass filter adopts the microstrip filter structure, and type is 5 rank chebyshev low-pass filters, and cut-off frequency is 30GHz.Be used for the extra harmonic component that leaching frequency multiplication path produces; This vibration magnifier 427 adopts the casacade multi-amplifier cascade structure, and circuit is realized based on the cha3689 chip.That is to say that the output frequency that said frequency multiplication module 42 is required according to frequency synthesizer is chosen low frequency or high frequency frequency multiplication path, realized the output of super large bandwidth local oscillation signal.
Said down conversion module is used for the high-frequency signal of high frequency amplifying module output is divided frequency range, and converts intermediate-freuqncy signal into and output to the intermediate frequency amplification module.Shown in the following tabulation 4 of the technical indicator of down conversion module.
Table 4
Wherein, this intermediate frequency amplification module comprises intermediate frequency low noise amplifier and low pass filter.Said intermediate frequency low noise amplifier adopts the third stage amplifier cascade structure, and amplifier circuit realizes that based on the HMC374 chip single-stage gain amplifier is 13dB, and the gain of intermediate frequency low noise amplifier can reach 39dB; Low pass filter adopts the LC filter construction, and type is 5 rank chebyshev low-pass filters, and cut-off frequency is 3.5GHz, and it is used for the extra noise component that leaching intermediate frequency low noise amplifier is produced.The intermediate frequency amplification module is used to receive and amplify the intermediate-freuqncy signal of down conversion module output, exports to the secondary receiver then.The technical indicator of intermediate frequency amplification module is as shown in table 5:
Table 5
| Intermediate frequency amplification module parameter | Technical indicator |
| Gain | ?39dB |
| Centre frequency | ?2GHz |
| Inband flatness | ?<1dB |
| Band is outer to be suppressed | ?>;25dBc1GHz |
Hence one can see that, and said one-level receiver selects for use the two-stage structure for amplifying to avoid the self-oscillation phenomenon under the 80dB gain.It (is that superheterodyne receiver adopts the mode of down-conversion will receive signal to downconvert to zero intermediate frequency that the one-level receiver carries out frequency range rough segmentation for the first time through the output signal frequency that switches down conversion module medium frequency synthesizer; Adopt a fixing required bandwidth of low pass filter leaching then; The signal frequency that frequency synthesizer is launched is depended in the selection of frequency range); Frequency range is divided serial in chronological order and is realized (promptly), has reduced system complexity.The structure of said secondary receiver is the multichannel receiver array structure, is made up of power splitter, cavity body filter group, square law geophone group and video amplification module several sections.The power of one-level receiver input is the intermediate-freuqncy signal of 1.6～2.4GHz for-20dBm, frequency; Be divided into different passages through after power splitter and the cavity body filter group, the voltage signal that has the bright temperature information of sky through output behind square law geophone group and the video amplification module then is to the AD acquisition module.
This power splitter adopts Wilkinson microstrip power divider structure, is made up of the microstrip line and the microwave resistance of Wilkinson structure.The manufacturing materials of microstrip line is a copper, is positioned on the AD1000 microwave sheet material, and the dielectric constant of microwave sheet material is 10.6, and thickness is 1mm; Microwave resistance is selected 50 ohm of microwave resistance for use.Power splitter is used for the intermediate-freuqncy signal constant power of one-level receiver output is divided into ten passages, and exports to the cavity body filter group.The technical indicator of this power splitter is as shown in table 6:
Table 6
| The power splitter parameter | Technical indicator |
| Frequency range | 1.6～2.4GHz |
| Insert loss | <0.6dB |
| Isolation | >;20dB |
| The amplitude balance degree | <0.3dB |
| Standing-wave ratio | <1.3 |
Wherein, this cavity body filter group adopts the cavity body filter structure, and type is the oval band pass filters in 7 rank, and bandwidth is 80MHz.Cavity body filter is made up of resonant cavity and tuning screw.Resonant cavity is selected the coaxial cavity structure for use, and tuning screw is processed with iron and fixed with conducting resinl.The cavity body filter group is used for that intermediate-freuqncy signal is carried out frequency range divides, and exports to the square law geophone group then.The technical indicator of cavity body filter group is as shown in table 7.
Table 7
This square law geophone group adopts the diode detection structure, utilizes the square law detection zone of diode, accomplishes the square law detection function under the small-signal.It is made up of detector diode, build-out resistor and video electric capacity several sections.Detector diode adopts the zero offset Schottky diode structure, chooses the HSMS282K detector diode and realizes.Build-out resistor is connected in parallel on the detector diode front end, is used to realize the Broadband Matching of the square law input impedance of detector.Video electric capacity is connected in parallel on the detector diode rear end, is used for the bandwidth of control output voltage signal.Build-out resistor and video electric capacity adopt 50 ohm of microwave resistance and 100pF microwave capacitors.The technical indicator of square law geophone group is as shown in table 8:
Table 8
| Square law geophone group parameter | Technical indicator |
| Frequency range | 1.6～2.4GHz |
| Input power | -40～-20dBm |
| Output voltage | 0～15mV |
| The linearity | >;0.9999 |
| Sensitivity | >;1.0mV/μW |
Wherein, this video amplification module adopts two-stage calculation amplifier cascade structure, and in order to guaranteeing enough big input impedance, thereby the voltage signal that the square law geophone group is exported can enter into the video amplification module fully.Operational amplifier is realized based on the op777 chip, because the output voltage of square law geophone group is very little, so the video amplification module is used for voltage signal is amplified in the dynamic range of AD collection.The technical indicator of video amplification module is as shown in table 9:
Table 9
| Video amplification module parameter | Technical indicator |
| Frequency range | 0～50MHz |
| Multiplication factor | 200 times |
| Output voltage | 0～3V |
Hence one can see that, and said secondary receiver has been set up the linear relationship between atmospheric radiation power and the voltage signal through the square law geophone group, makes the two-point calibration of radiometer become possibility.The secondary receiver carries out the frequency range segmentation second time through the cavity body filter group, and frequency range is divided Parallel Implementation simultaneously, has reduced the sky Measuring Time.
In the embodiment of the invention, said one-level receiver carries out the frequency range rough segmentation first time through the output signal frequency that switches down conversion module medium frequency synthesizer, and frequency range is divided serial in chronological order and realized, has reduced system complexity; The secondary receiving system has been set up the linear relationship between atmospheric radiation power and the voltage signal through the square law geophone group, makes the two-point calibration of radiometer become possibility.The secondary receiving system carries out the frequency range segmentation second time through the cavity body filter group, and frequency range is divided Parallel Implementation simultaneously, has reduced the sky Measuring Time.
Based on above-mentioned implementation procedure, the embodiment of the invention also provides a kind of microwave high spectrum method of reseptance, and its flow chart is as shown in Figure 5, and said method comprises:
Step 501: the high-frequency signal of reception antenna input;
Step 502: said high-frequency signal is carried out frequency range divide;
Step 503: the said high-frequency signal that frequency range is divided down-converts to first intermediate-freuqncy signal, amplifies said first intermediate-freuqncy signal; Specifically comprise:
Generate local oscillation signal; The said high-frequency signal of said frequency range being divided according to said local oscillation signal carries out down-converted, obtains first intermediate-freuqncy signal.
Step 504: the said first intermediate-freuqncy signal constant power after will amplifying is divided into the multichannel intermediate-freuqncy signal;
Step 505: the every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal is carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, and amplify the said voltage signal of output.
That is to say that among this embodiment, the one-level receiver receives and amplify the high-frequency signal of reception antenna input; Extra noise component to producing in the amplification process is carried out filtering, and the high-frequency signal that will export is carried out pre-filtering to suppress the mirror image noise; And the high-frequency signal of exporting after the process filtering is carried out frequency range through tuning local frequency divide for the first time, and convert intermediate-freuqncy signal into; And amplify said intermediate-freuqncy signal, and export said intermediate-freuqncy signal to the secondary receiver.Afterwards; The said first intermediate-freuqncy signal constant power that the secondary receiver will receive is divided into the multichannel intermediate-freuqncy signal; And the every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, amplify and export said voltage signal; That is to say, will pass through the intermediate-freuqncy signal of power divider and carry out the parallel simultaneously frequency range secondary division of multichannel; Receive the signal of telecommunication of dividing through the frequency range secondary, set up the linear relationship of monitored index of atmosphere and voltage signal, and output characterizes the voltage signal of the monitored index of atmosphere; Said voltage signal is amplified back output.
The high spectrum method of reseptance of the microwave that present embodiment provides; Mode through tuning local frequency serial in chronological order realizes that frequency range divides for the first time; Make system complexity reduce greatly, carry out multichannel frequency range secondary again and divide, simultaneously Parallel Implementation; Reduce the system scan time, can in time grasp atmospheric condition apace.
High spectrum receiver of microwave provided by the present invention and method of reseptance, the receiving element of employing two-stage cascade structure, first order receiving system frequency range is divided serial in chronological order and is realized, has reduced the complexity of system; Second level receiving system frequency range is divided Parallel Implementation simultaneously, has reduced the system scan time.
In this article; Relational terms such as first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint relation or the order that has any this reality between these entities or the operation.And; Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability; Thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements; But also comprise other key elements of clearly not listing, or also be included as this process, method, article or equipment intrinsic key element.Under the situation that do not having much more more restrictions, the key element that limits by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises said key element and also have other identical element.
Through the description of above execution mode, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding; The part that technical scheme of the present invention contributes to prior art in essence in other words can be come out with the embodied of software product; This computer software product can be stored in the storage medium, like ROM/RAM, magnetic disc, CD etc., comprises that some instructions are with so that a computer equipment (can be a personal computer; Server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (13)
1. high spectrum receiver of microwave is characterized in that: comprise one-level receiving system and secondary receiving system, wherein,
Said one-level receiving system; The high-frequency signal that is used for the reception antenna input; Said high-frequency signal is carried out frequency range divide, and the said high-frequency signal of frequency range division is down-converted to first intermediate-freuqncy signal, amplify said first intermediate-freuqncy signal of output to said secondary receiving system;
Said secondary receiving system; Be used to receive said first intermediate-freuqncy signal after the amplification; The said first intermediate-freuqncy signal constant power is divided into the multichannel intermediate-freuqncy signal; And the every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, amplify and export said voltage signal.
2. the high spectrum receiver of microwave according to claim 1 is characterized in that, said one-level receiving system comprises: high frequency amplifying module, mirror image noise filtering module, down conversion module and intermediate frequency amplification module, wherein,
Said high frequency amplifying module is used for the high-frequency signal of reception antenna input, amplifies and exports said high-frequency signal;
Said mirror image noise filtering module is used for the extra noise component that high frequency amplifying module produces is carried out filtering; High-frequency signal to exporting to down conversion module carries out pre-filtering, suppresses the mirror image noise; And receive the control signal that down conversion module is sent, control said high-frequency signal according to said control signal and export in the corresponding cavity body filter;
Said down conversion module; Be used to receive the high-frequency signal after the pre-filtering of said mirror image noise filtering module, said high-frequency signal is carried out frequency range divide, and the said high-frequency signal that frequency range is divided carry out down-converted; Obtain first intermediate-freuqncy signal, export said first intermediate-freuqncy signal;
Said intermediate frequency amplification module is used for receiving and amplifying said first intermediate-freuqncy signal, exports first intermediate-freuqncy signal to the said secondary receiving system of said amplification.
3. the high spectrum receiver of microwave according to claim 2 is characterized in that said high frequency amplifying module comprises Waveguide coaxial transition components and high frequency low noise amplifier;
Said Waveguide coaxial transition components is used for converting the Waveguide interface of said reception antenna into coaxial interface;
Said high frequency low noise amplifier is used to amplify the high-frequency signal through said coaxial interface reception antenna input.
4. the high spectrum receiver of microwave according to claim 2; It is characterized in that: said mirror image noise filtering module comprises: first microwave switch, second microwave switch; And a plurality of multistage band pass filters; Wherein, an end of each multistage band pass filter is connected with first microwave switch, and the other end is connected with second microwave switch; Said first microwave switch also is connected with frequency synthesizer with high frequency amplifying module, said second microwave switch also with down conversion module in low-converter be connected with frequency synthesizer; The Kai Heguan of first microwave switch, and the Kai Heguan of second microwave switch receive the control of the control signal of said frequency synthesizer output.
5. the high spectrum receiver of microwave according to claim 2, it is characterized in that: said down conversion module comprises: frequency synthesizer and low-converter, wherein,
Said frequency synthesizer is used to generate the local oscillation signal of different frequency, and exports said local oscillation signal and give said low-converter; And the generation control signal, export said control signal to said mirror image noise filtering module;
Said low-converter is used for carrying out down-converted according to the high-frequency signal that said local oscillation signal is exported said high frequency amplifying module, obtains first intermediate-freuqncy signal, and said first intermediate-freuqncy signal is exported to the intermediate frequency amplification module.
6. the high spectrum receiver of microwave according to claim 5, it is characterized in that: said frequency synthesizer comprises: lock phase module and frequency multiplication module; Wherein,
Said lock phase module is used for reference frequency frequency multiplication to the intermediate frequency frequency range that the reference frequency source with low frequency provides;
Said frequency multiplication module is used for the required output frequency according to frequency synthesizer, chooses low frequency frequency multiplication path or high frequency frequency multiplication path according to said reference frequency, and the local oscillation signal of pre-set bandwidths is satisfied in output.
7. the high spectrum receiver of microwave according to claim 6 is characterized in that, said lock phase module comprises: reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, wherein,
Said reference frequency source is used to provide the reference frequency of standard;
Said digital frequency divider is used to provide different frequency dividing ratios, and the reference frequency that provides with said reference frequency source is a frequency step, the output frequency of the said voltage controlled oscillator of control under said phase discriminator cooperates.
8. the high spectrum receiver of microwave according to claim 6; It is characterized in that said frequency multiplication module comprises: first varactor doubler, first single-pole double-throw switch (SPDT), second single-pole double-throw switch (SPDT), first band pass filter, second varactor doubler, second band pass filter, this vibration magnifier and low pass filter; Wherein, said first band pass filter and second varactor doubler form high frequency frequency multiplication path, and the logical frequency multiplier of second band forms low frequency frequency multiplication path, wherein,
Said first varactor doubler is used for the output signal of said lock phase module is carried out frequency multiplication;
Said first single-pole double-throw switch (SPDT), the signal that is used to control said first varactor doubler output exports said first band pass filter or second band pass filter to;
Said first band pass filter is used for the low frequency signal that leaching receives signal, and exports said low frequency signal to said second varactor doubler;
Said second varactor doubler carries out exporting said second single-pole double-throw switch (SPDT) to after the frequency multiplication to the low frequency signal that receives;
Said second band pass filter is used for the high-frequency signal that the said lock phase module of leaching is exported, and exports said high-frequency signal to said second single-pole double-throw switch (SPDT);
Said second single-pole double-throw switch (SPDT) is used to control the signal of said second varactor doubler transmission or the signal of said second band pass filter transmission exports this vibration magnifier to;
Said vibration magnifier is used to receive and amplify the local oscillation signal of said second single-pole double-throw switch (SPDT) input;
Said first low pass filter is used for the extra noise component that leaching said low frequency frequency multiplication path or high frequency frequency multiplication path are produced, and the output local oscillation signal is to said low-converter.
9. the high spectrum receiver of microwave according to claim 2 is characterized in that said intermediate frequency amplification module comprises the intermediate frequency low noise amplifier and second low pass filter;
Said intermediate frequency low noise amplifier is used to amplify the intermediate-freuqncy signal by said down conversion module output;
Said second low pass filter is used to filter the extra noise component that said intermediate frequency low noise amplifier produces.
10. according to the high spectrum receiver of each described microwave of claim 1 to 9, it is characterized in that said secondary receiving system comprises:
The merit sub-module is used for the first intermediate-freuqncy signal constant power of one-level receiving system output is divided into the multichannel intermediate-freuqncy signal, and exports said multichannel intermediate-freuqncy signal to cavity filtration module group through multiplexer channel;
Cavity filtration module group is used for that the every road intermediate-freuqncy signal that receives is carried out frequency range and divides, and exports the intermediate-freuqncy signal after the frequency range division to square law detection module groups;
Square law detection module groups is used for the every road intermediate-freuqncy signal that receives after frequency range is divided is carried out the square law detection, and control output has the bandwidth of the voltage signal of the bright temperature information of sky;
The video amplification module be used for the voltage signal that receives the output of square law detection module groups is amplified, and the voltage signal after will amplifying exports the weather information harvester to.
11. the high spectrum receiver of microwave according to claim 10 is characterized in that:
Said cavity filtration module group comprises a plurality of cavity body filters, and each cavity body filter is seven rank elliptic cavity fluid filters;
Said square law detection module groups comprises a plurality of wave detectors, and each wave detector is a diode detector; Wherein, the number of said cavity body filter and wave detector is identical;
Said video amplification module comprises: the two-stage calculation amplifier of cascade.
12. the high spectrum method of reseptance of microwave is characterized in that, comprising:
The high-frequency signal of reception antenna input;
Said high-frequency signal is carried out frequency range to be divided;
Said high-frequency signal after the frequency range division is down-converted to first intermediate-freuqncy signal, amplify said first intermediate-freuqncy signal;
The said first intermediate-freuqncy signal constant power after amplifying is divided into the multichannel intermediate-freuqncy signal;
Every road intermediate-freuqncy signal in the said multichannel intermediate-freuqncy signal is carried out carrying out the square law detection after frequency range is divided, obtain having the voltage signal of the bright temperature information of sky, and amplify the said voltage signal of output.
13. method according to claim 12 is characterized in that, said said high-frequency signal after frequency range is divided down-converts to first intermediate-freuqncy signal and comprises:
Generate local oscillation signal;
The said high-frequency signal of said frequency range being divided according to said local oscillation signal carries out down-converted, obtains first intermediate-freuqncy signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298659.0A CN102843159B (en) | 2012-08-21 | 2012-08-21 | Microwave hyperspectral receiver and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298659.0A CN102843159B (en) | 2012-08-21 | 2012-08-21 | Microwave hyperspectral receiver and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102843159A true CN102843159A (en) | 2012-12-26 |
| CN102843159B CN102843159B (en) | 2014-10-29 |
Family
ID=47370257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210298659.0A Expired - Fee Related CN102843159B (en) | 2012-08-21 | 2012-08-21 | Microwave hyperspectral receiver and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102843159B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715990A (en) * | 2013-12-30 | 2014-04-09 | 北京航天测控技术有限公司 | Down-conversion system of multi-channel broadband |
| CN104698274A (en) * | 2013-12-10 | 2015-06-10 | 苏州普源精电科技有限公司 | Spectrum analyzer with local oscillator calibration function |
| CN105227197A (en) * | 2015-10-19 | 2016-01-06 | 中国电子科技集团公司第二十八研究所 | The quick frequency locking receiving system of a kind of X-band |
| CN105553495A (en) * | 2015-12-18 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Method for receiving frequency band signal above 20GHz in spread spectrum manner through millimeter wave receiver |
| CN107888215A (en) * | 2017-12-25 | 2018-04-06 | 华通信安(北京)科技发展有限公司 | A kind of broadband receiver RF front-end circuit |
| CN109818637A (en) * | 2018-10-26 | 2019-05-28 | 成都众志天成科技有限公司 | A kind of receiver signal scan method |
| CN112595731A (en) * | 2020-11-05 | 2021-04-02 | 中国科学院国家空间科学中心 | Configurable digital spectrometer for hyperspectral microwave radiometer |
| CN113010991A (en) * | 2019-12-20 | 2021-06-22 | 中国科学院国家空间科学中心 | Spectrum radiometer system simulation and performance evaluation method |
| CN114710126A (en) * | 2022-06-08 | 2022-07-05 | 成都嘉纳海威科技有限责任公司 | Reconfigurable broadband amplifier based on GaAs Bi-HEMT technology |
| CN115225046A (en) * | 2022-09-15 | 2022-10-21 | 成都国盛军通科技有限公司 | Power amplification assembly and method for C-band |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004091179A1 (en) * | 2003-04-03 | 2004-10-21 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Dual band superheterodyne radar receiver |
| CN201054734Y (en) * | 2007-06-28 | 2008-04-30 | 重庆会凌电子新技术有限公司 | A broad frequency monitoring receiver |
| CN101373217A (en) * | 2008-08-28 | 2009-02-25 | 阮树成 | Millimeter wave marine frequency modulation multichannel anti-collision radar |
| CN201690414U (en) * | 2010-03-19 | 2010-12-29 | 西安航天恒星科技实业(集团)公司 | Transceiving channel device for KA frequency converter |
| CN102243304A (en) * | 2010-05-14 | 2011-11-16 | 中国科学院空间科学与应用研究中心 | Foundation-based atmosphere profile microwave detector |
| CN202172385U (en) * | 2011-08-25 | 2012-03-21 | 深圳奥视通电子有限公司 | Low-noise down converter |
-
2012
- 2012-08-21 CN CN201210298659.0A patent/CN102843159B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004091179A1 (en) * | 2003-04-03 | 2004-10-21 | The Government Of The United States Of America, As Represented By The Secretary Of The Navy | Dual band superheterodyne radar receiver |
| CN201054734Y (en) * | 2007-06-28 | 2008-04-30 | 重庆会凌电子新技术有限公司 | A broad frequency monitoring receiver |
| CN101373217A (en) * | 2008-08-28 | 2009-02-25 | 阮树成 | Millimeter wave marine frequency modulation multichannel anti-collision radar |
| CN201690414U (en) * | 2010-03-19 | 2010-12-29 | 西安航天恒星科技实业(集团)公司 | Transceiving channel device for KA frequency converter |
| CN102243304A (en) * | 2010-05-14 | 2011-11-16 | 中国科学院空间科学与应用研究中心 | Foundation-based atmosphere profile microwave detector |
| CN202172385U (en) * | 2011-08-25 | 2012-03-21 | 深圳奥视通电子有限公司 | Low-noise down converter |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104698274A (en) * | 2013-12-10 | 2015-06-10 | 苏州普源精电科技有限公司 | Spectrum analyzer with local oscillator calibration function |
| CN104698274B (en) * | 2013-12-10 | 2019-01-08 | 苏州普源精电科技有限公司 | A kind of spectrum analyzer with local oscillator calibration function |
| CN103715990A (en) * | 2013-12-30 | 2014-04-09 | 北京航天测控技术有限公司 | Down-conversion system of multi-channel broadband |
| CN103715990B (en) * | 2013-12-30 | 2016-08-17 | 北京航天测控技术有限公司 | A kind of down conversion system in multichannel broadband |
| CN105227197A (en) * | 2015-10-19 | 2016-01-06 | 中国电子科技集团公司第二十八研究所 | The quick frequency locking receiving system of a kind of X-band |
| CN105227197B (en) * | 2015-10-19 | 2017-07-07 | 中国电子科技集团公司第二十八研究所 | A kind of quick frequency locking method of reseptance of X-band |
| CN105553495A (en) * | 2015-12-18 | 2016-05-04 | 中国电子科技集团公司第四十一研究所 | Method for receiving frequency band signal above 20GHz in spread spectrum manner through millimeter wave receiver |
| CN107888215A (en) * | 2017-12-25 | 2018-04-06 | 华通信安(北京)科技发展有限公司 | A kind of broadband receiver RF front-end circuit |
| CN109818637A (en) * | 2018-10-26 | 2019-05-28 | 成都众志天成科技有限公司 | A kind of receiver signal scan method |
| CN113010991A (en) * | 2019-12-20 | 2021-06-22 | 中国科学院国家空间科学中心 | Spectrum radiometer system simulation and performance evaluation method |
| CN113010991B (en) * | 2019-12-20 | 2024-04-05 | 中国科学院国家空间科学中心 | Spectral radiometer system simulation and performance evaluation method |
| CN112595731A (en) * | 2020-11-05 | 2021-04-02 | 中国科学院国家空间科学中心 | Configurable digital spectrometer for hyperspectral microwave radiometer |
| CN112595731B (en) * | 2020-11-05 | 2022-07-26 | 中国科学院国家空间科学中心 | Configurable digital spectrometer for hyperspectral microwave radiometer |
| CN114710126A (en) * | 2022-06-08 | 2022-07-05 | 成都嘉纳海威科技有限责任公司 | Reconfigurable broadband amplifier based on GaAs Bi-HEMT technology |
| CN115225046A (en) * | 2022-09-15 | 2022-10-21 | 成都国盛军通科技有限公司 | Power amplification assembly and method for C-band |
| CN115225046B (en) * | 2022-09-15 | 2022-12-13 | 成都国盛军通科技有限公司 | Power amplification assembly and method for C-band |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102843159B (en) | 2014-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102843159B (en) | Microwave hyperspectral receiver and method | |
| CN110190861B (en) | Millimeter wave broadband receiver | |
| CN107276540B (en) | Terahertz image frequency suppression mixing circuit | |
| CN113225021B (en) | Ultra-wideband constant-temperature down converter | |
| CN109995366B (en) | X-waveband signal synthesis method and X-waveband agile frequency synthesizer | |
| CN213521865U (en) | Frequency conversion receiving system | |
| CN107342780B (en) | Novel all-solid-state terahertz receiver front end | |
| CN102652392A (en) | Semiconductor integrated circuit and tuner system provided with same | |
| CN111585514A (en) | Millimeter wave down conversion subassembly | |
| CN114938204A (en) | SC wave band amplitude-phase consistent frequency conversion assembly | |
| CN108400785A (en) | A kind of miniaturization microwave broadband victory frequency Up/Down Conversion system and calibration method | |
| CN112564629B (en) | Spectrum spreading device based on dual-port mixer | |
| CN213783247U (en) | Four-channel frequency conversion assembly | |
| CN114204950A (en) | High-performance broadband microwave receiving channel | |
| CN112688702A (en) | Superheterodyne cubic frequency conversion broadband receiver | |
| CN107171681A (en) | A kind of highly sensitive receiving circuit of Ku wave bands | |
| CN109150207B (en) | Self-mixing frequency conversion device | |
| CN213484860U (en) | Multichannel low-power consumption broadband receiver | |
| CN213461730U (en) | Miniaturized low-power consumption receiver | |
| CN213585704U (en) | Spectrum expanding device based on dual-port mixer | |
| CN209593413U (en) | A kind of small-sized integrated receiver in broadband | |
| CN109728829B (en) | High-performance broadband radio frequency receiving module | |
| CN113671264A (en) | Switch type multi-channel radiometer | |
| CN215575356U (en) | Frequency spectrograph system with Tuner chip | |
| CN219611731U (en) | Frequency conversion assembly with high-frequency and ultra-instantaneous bandwidth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150821 |
|
| EXPY | Termination of patent right or utility model |