CN102843159B - Microwave hyperspectral receiver and method - Google Patents

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

The high spectrum Receiving machine and method of a kind of microwave

Technical field

The present invention relates to 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.The high-frequency signal of antenna output is down-converted to low frequency processing by superheterodyne receiver, and carry out frequency range division by the mode of tuning local frequency; Array acceptor directly carries out to antenna output signal that merit is divided, filtering processing, completes frequency range and divides.The high spectral radiometer of microwave need to obtain continuous atmospheric radiation spectral line in working frequency range, and the port number of receiver reaches more than 100.If select superheterodyne receiver structure, adopt the mode of down-conversion that reception signal is downconverted to zero intermediate frequency, then adopt a fixing required bandwidth of low pass filter leaching, 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 within the same time, so this frequency range dividing mode need to complete the process of down-conversion in chronological order, namely cause the increase of System trace time, be unfavorable for observing Changes in weather fast, if select array acceptor structure, array acceptor will receive signal merit and divide to multichannel, then adopt the required frequency band of multiple band-pass filter group leachings, the frequency response of band-pass filter group is depended in the selection of frequency range, divide to multiple band-pass filter groups and carry out work simultaneously owing to receiving signal merit, so this frequency range dividing mode be walked abreast frequency range divide process, but the quantity of band-pass filter group equals the number of channels of receiver, when so receiver channel number is many, the complexity of system also rises thereupon, be unfavorable for development and the delivery of microwave radiometer.

Therefore, how reducing the sweep time of reception and reduce the complexity of receiving system is the problem that needs solve.

Summary of the invention

In view of this, the invention provides the high spectrum Receiving machine and method of a kind of microwave, to reduce the complexity of System trace time and system.

For addressing the above problem, the technical scheme that the embodiment of the present invention provides is as follows:

On the one hand, the invention provides the high spectrum receiver of a kind of microwave, comprise one-level receiving system and secondary receiving system, wherein,

Described one-level receiving system, for the high-frequency signal of reception antenna input, described high-frequency signal is carried out to frequency range division, and the described high-frequency signal that frequency range is divided down-converts to the first intermediate-freuqncy signal, extremely described secondary receiving system of described the first intermediate-freuqncy signal of amplification output;

Described secondary receiving system, for receiving described the first intermediate-freuqncy signal after amplification, described the first intermediate-freuqncy signal constant power is divided into multichannel intermediate-freuqncy signal, and described multichannel intermediate-freuqncy signal Zhong Mei road intermediate-freuqncy signal is carried out carrying out square law detection after frequency range division, obtain the voltage signal with sky temperature information, amplify and export described voltage signal.

Wherein, described one-level receiving system comprises: high frequency amplifying module, noise of image filtration module, down conversion module and intermediate frequency amplification module, wherein,

Described high frequency amplifying module, for the high-frequency signal of reception antenna input, amplifies and exports described high-frequency signal;

Described noise of image filtration module, carries out filtering for the extra noise component that high frequency amplifying module is produced; The high-frequency signal that will export to down conversion module is carried out to pre-filtering, suppress noise of image; And receive the control signal that down conversion module is sent, export in corresponding cavity body filter according to high-frequency signal described in described control signal control;

Described down conversion module, for receiving the high-frequency signal after the pre-filtering of described noise of image filtration module, described high-frequency signal is carried out to frequency range division, and the described high-frequency signal that frequency range is divided carries out down-converted, obtain the first intermediate-freuqncy signal, export described the first intermediate-freuqncy signal;

Described intermediate frequency amplification module, for receiving and amplifying described the first intermediate-freuqncy signal, exports the first intermediate-freuqncy signal of described amplification to described secondary receiving system.

Wherein, described down conversion module comprises: frequency synthesizer and low-converter,

Described frequency synthesizer, for generating the local oscillation signal of different frequency, and exports described local oscillation signal to described low-converter; And generation control signal, export described control signal to described noise of image filtration module;

Described low-converter, for according to described local oscillation signal, the high-frequency signal of described high frequency amplifying module output being carried out to down-converted, obtains the first intermediate-freuqncy signal, and described the first intermediate-freuqncy signal is exported to intermediate frequency amplification module.

Wherein, described frequency synthesizer comprises: phase-locked module and times frequency module,

Described phase-locked module, for reference frequency frequency multiplication that the reference frequency source of low frequency is provided to intermediate-frequency band;

Described times of frequency module, for the required output frequency according to frequency synthesizer, chooses low frequency frequency multiplication path or high frequency frequency multiplication path according to described reference frequency, and output meets the local oscillation signal of pre-set bandwidths.

Wherein, described times of frequency module comprises: the first varactor doubler, the first single-pole double-throw switch (SPDT), the second single-pole double-throw switch (SPDT), the first band pass filter, the second varactor doubler, the second band pass filter, this vibration magnifier and low pass filter; Wherein, described the first band pass filter and the second varactor doubler form low frequency frequency multiplication path, and the second band pass filter forms high frequency frequency multiplication path, wherein,

Described the first varactor doubler, for carrying out frequency multiplication by the output signal of described phase-locked module;

Described the first single-pole double-throw switch (SPDT), exports described the first band pass filter or the second band pass filter to for the signal of controlling described the first varactor doubler output;

Described the first band pass filter, receives the low frequency signal of signal, and exports described low frequency signal to described the second varactor doubler for leaching;

Described the second varactor doubler carries out exporting described the second single-pole double-throw switch (SPDT) to after frequency multiplication to the low frequency signal receiving;

Described the second band pass filter, for the high-frequency signal of phase-locked module output described in leaching, and exports described high-frequency signal to described the second single-pole double-throw switch (SPDT);

Described the second single-pole double-throw switch (SPDT), for control described second varactor doubler send signal or described second band pass filter send signal export this vibration magnifier to;

Described vibration magnifier, for receiving and amplify the local oscillation signal of described the second single-pole double-throw switch (SPDT) input;

Described the first low pass filter, the extra noise component producing for low frequency frequency multiplication path described in leaching or high frequency frequency multiplication path, output local oscillation signal is to described low-converter.

Optionally, described high frequency amplifying module comprises Waveguide coaxial transition components and high-frequency low-noise acoustic amplifier;

Described Waveguide coaxial transition components, for being converted to coaxial interface by the Waveguide interface of described reception antenna;

Described high-frequency low-noise acoustic amplifier, for amplifying by the high-frequency signal of described coaxial interface reception antenna input.

Optionally, described noise of image filtration module comprises: the first microwave switch, the second microwave switch, and multiple multistage band pass filters, wherein, one end of each multistage band pass filter is connected with the first microwave switch, the other end is connected with the second microwave switch, and described the first microwave switch is also connected with high frequency amplifying module and frequency synthesizer, and described the second microwave switch is also connected with low-converter and frequency synthesizer in down conversion module; The Kai Heguan of the first microwave switch, and the Kai Heguan of the second microwave switch, be subject to the control of the control signal of described frequency synthesizer output.

Optionally, described phase-locked module comprises: reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, wherein,

Described reference frequency source, for providing the reference frequency of standard;

Described digital frequency divider, for different frequency dividing ratios are provided, the reference frequency providing taking described reference frequency source is frequency step, controls the output frequency of described voltage controlled oscillator under described phase discriminator coordinates.

Optionally, described intermediate frequency amplification module comprises intermediate frequency low noise amplifier and the second low pass filter;

Described intermediate frequency low noise amplifier, for amplifying the intermediate-freuqncy signal of being exported by described down conversion module;

Described the second low pass filter, the extra noise component producing for filtering described intermediate frequency low noise amplifier.

Optionally, described secondary receiving system comprises:

Merit sub-module, for the first intermediate-freuqncy signal constant power of one-level receiving system output is divided into multichannel intermediate-freuqncy signal, and exports described multichannel intermediate-freuqncy signal to cavity filtration module group by multiplexer channel;

Cavity filtration module group, for carrying out frequency range division to receiving Mei road intermediate-freuqncy signal, and exports the intermediate-freuqncy signal after frequency range division to square law detection module group;

Square law detection module group, for carrying out square law detection to receiving frequency range division Hou Mei road intermediate-freuqncy signal, controls the bandwidth of output with the voltage signal of sky temperature information;

Video amplifier module, for the voltage signal that receives the output of square law detection module group is amplified, and exports the voltage signal after amplifying to weather information acquisition device.

Optionally, described cavity filtration module group comprises multiple cavity body filters, and each cavity body filter is seven rank elliptic cavity fluid filters;

Described square law detection module group comprises multiple wave detectors, and each wave detector is diode detector; Wherein, the number of described cavity body filter and wave detector is identical;

Described video amplifier 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 described method comprises:

The high-frequency signal of reception antenna input;

Amplify described high-frequency signal;

Described high-frequency signal after amplifying is carried out to pre-filtering, suppress its noise of image;

The reference frequency frequency multiplication that proportion synthesizer provides the reference frequency source of low frequency is to intermediate-frequency band, and the required output frequency of the described frequency synthesizer of foundation, choose low frequency frequency multiplication chain or high frequency frequency multiplication chain according to described reference frequency, described high-frequency signal after described pre-filtering is carried out to frequency range division, and output meets the local oscillation signal of pre-set bandwidths;

Described high-frequency signal after described frequency range being divided according to described local oscillation signal carries out down-converted, obtains the first intermediate-freuqncy signal;

Amplify described the first intermediate-freuqncy signal;

Described the first intermediate-freuqncy signal constant power after amplifying is divided into multichannel intermediate-freuqncy signal;

Described multichannel intermediate-freuqncy signal Zhong Mei road intermediate-freuqncy signal is carried out carrying out square law detection after frequency range division, obtain the voltage signal with sky temperature information, and amplify the described voltage signal of output.

Optionally, described described high-frequency signal after frequency range is divided down-converts to the first intermediate-freuqncy signal and comprises:

Generate local oscillation signal;

The described high-frequency signal of described frequency range being divided according to described local oscillation signal carries out down-converted, obtains the first intermediate-freuqncy signal.

As shown from the above technical solution, the high spectrum receiving system of microwave provided by the present invention and method, adopt two-stage cascade structure, and first order receiving system frequency range is divided serial implementation in chronological order, has reduced the complexity of system; Second level receiving system frequency range is divided Parallel Implementation simultaneously, has reduced System trace time.

Brief description of the drawings

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the first structural representation of the high spectrum receiver of a kind of microwave provided by the invention;

Fig. 2 is the second structural representation of the high spectrum receiver of a kind of microwave provided by the invention;

Fig. 3 is the theory structure schematic diagram of the high spectrum receiving system of a kind of microwave provided by the invention;

Fig. 4 is the theory structure schematic diagram 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

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out to clear, complete description, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Refer to Fig. 1, the structural representation of the high spectrum receiver of a kind of microwave providing for the embodiment of the present invention, described device comprises: one-level receiving system 11 and secondary receiving system 12, wherein,

Described one-level receiving system 11, for the high-frequency signal of reception antenna input, described high-frequency signal is carried out to frequency range division, and the described high-frequency signal that frequency range is divided down-converts to the first intermediate-freuqncy signal, extremely described secondary receiving system of described the first intermediate-freuqncy signal of amplification output;

Described secondary receiving system 12, for receiving described the first intermediate-freuqncy signal after described one-level receiving system 11 amplifies, described the first intermediate-freuqncy signal constant power is divided into multichannel intermediate-freuqncy signal, and described multichannel intermediate-freuqncy signal Zhong Mei road intermediate-freuqncy signal is carried out carrying out square law detection after frequency range division, obtain the voltage signal with sky temperature information, amplify and export described voltage signal.

Optional, the high spectrum receiver of described microwave can be the high spectrum receiver of microwave for the high spectral radiometer of microwave, that is to say, the Multi-channel microwave receiver that the high spectrum receiver of described microwave is a kind of two-stage cascade structure, and described first order receiving system, secondary receiving system is respectively one-level receiver and secondary receiver, wherein, the mechanism of described one-level receiver can be superheterodyne receiver structure, the module that its one-level receiver specifically comprises as shown in Figure 2, described secondary receiver can be array acceptor, it utilizes multiple band-pass filter groups that direct above-mentioned medium-frequency band leaching is gone out to corresponding band, the centre frequency of 10 frequency ranges in for example following table 7.It module comprising also as shown in Figure 2.

Refer to Fig. 2, for the second structural representation of the high spectrum receiver of a kind of microwave provided by the invention, in this embodiment, described one-level receiving system 11 comprises: high frequency amplifying module 111, noise of image filtration module 112, down conversion module 113 and intermediate frequency amplification module 114; Described secondary receiver 12 comprises: merit sub-module 121, and cavity filtration module group 122, square law detection module group 123 and video amplifier module 124, wherein,

Described high frequency amplifying module 111, for the high-frequency signal of reception antenna input, amplifies and exports described high-frequency signal; Wherein, described high frequency amplifying module comprises Waveguide coaxial transition components and high-frequency low-noise acoustic amplifier; Described Waveguide coaxial transition components, for being converted to coaxial interface by the Waveguide interface of described reception antenna; Described high-frequency low-noise acoustic amplifier, for amplifying by the high-frequency signal of described coaxial interface reception antenna input.

Described noise of image filtration module 112, carries out filtering for the extra noise component that high frequency amplifying module is produced; The high-frequency signal that will export to down conversion module is carried out to pre-filtering, suppress noise of image; And receive the control signal that down conversion module 113 (such as the frequency synthesizer in down conversion module) is sent, export in corresponding cavity body filter according to high-frequency signal described in described control signal control;

Wherein, described noise of image filtration module can comprise: the first microwave switch, the second microwave switch, and multiple multistage band pass filters, wherein, one end of each multistage band pass filter is connected with the first microwave switch, the other end is connected with the second microwave switch, and described the first microwave switch is also connected with high frequency amplifying module and frequency synthesizer, and described the second microwave switch is also connected with low-converter and frequency synthesizer in down conversion module; The Kai Heguan of the first microwave switch, and the Kai Heguan of the second microwave switch, be subject to the control of the control signal of described frequency synthesizer output;

Described down conversion module 113, for receiving the high-frequency signal after the pre-filtering of described noise of image filtration module, described high-frequency signal is carried out to frequency range division, and the described high-frequency signal that frequency range is divided carries out down-converted, obtain the first intermediate-freuqncy signal, export described the first intermediate-freuqncy signal.

Wherein, described down conversion module comprises: frequency synthesizer and low-converter, and described frequency synthesizer, for generating the local oscillation signal of different frequency, and exports described local oscillation signal to described low-converter; And generation control signal, export described control signal to described noise of image filtration module; Described low-converter, for according to described local oscillation signal, the high-frequency signal of described high frequency amplifying module output being carried out to down-converted, obtains the first intermediate-freuqncy signal, and described the first intermediate-freuqncy signal is exported to intermediate frequency amplification module;

Described frequency synthesizer can comprise again: phase-locked module and times frequency module; Wherein, described phase-locked module, for reference frequency frequency multiplication that the reference frequency source of low frequency is provided to intermediate-frequency band; Described times of frequency module, for the required output frequency according to frequency synthesizer, chooses low frequency frequency multiplication path or high frequency frequency multiplication path according to described reference frequency, and output meets the local oscillation signal of pre-set bandwidths;

Wherein, described phase-locked module comprises: reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, and wherein, described reference frequency source, for providing the reference frequency of standard; Described digital frequency divider, for different frequency dividing ratios are provided, the reference frequency providing taking described reference frequency source is frequency step, controls the output frequency of described voltage controlled oscillator under described phase discriminator coordinates.

Wherein, described times of frequency module comprises: the first varactor doubler, the first single-pole double-throw switch (SPDT), the second single-pole double-throw switch (SPDT), the first band pass filter, the second varactor doubler, the second band pass filter, this vibration magnifier and low pass filter; Wherein, described the first band pass filter and the second varactor doubler form high frequency frequency multiplication path, and the logical frequency multiplier of the second band forms low frequency frequency multiplication path, and wherein, described the first varactor doubler, for carrying out frequency multiplication by the output signal of described phase-locked module; Described the first single-pole double-throw switch (SPDT), exports described the first band pass filter or the second band pass filter to for the signal of controlling described the first varactor doubler output; Described the first band pass filter, receives the low frequency signal of signal, and exports described low frequency signal to described the second varactor doubler for leaching; Described the second varactor doubler carries out exporting described the second single-pole double-throw switch (SPDT) to after frequency multiplication to the low frequency signal receiving; Described the second band pass filter, for the high-frequency signal of phase-locked module output described in leaching, and exports described high-frequency signal to described the second single-pole double-throw switch (SPDT); Described the second single-pole double-throw switch (SPDT), for control described second varactor doubler send signal or described second band pass filter send signal export this vibration magnifier to; Described vibration magnifier, for receiving and amplify the local oscillation signal of described the second single-pole double-throw switch (SPDT) input; Described the first low pass filter, the extra noise component producing for low frequency frequency multiplication path described in leaching or high frequency frequency multiplication path, output local oscillation signal is to described low-converter.

Described intermediate frequency amplification module 114, for receiving and amplifying described the first intermediate-freuqncy signal, exports the first intermediate-freuqncy signal of described amplification to described secondary receiving system 12.Specifically comprise intermediate frequency low noise amplifier and the second low pass filter; Wherein, described intermediate frequency low noise amplifier, for amplifying the intermediate-freuqncy signal of being exported by described down conversion module; Described the second low pass filter, the extra noise component producing for filtering described intermediate frequency low noise amplifier.

Described merit sub-module 121, for the first intermediate-freuqncy signal constant power of one-level receiving system 11 (such as the intermediate frequency amplification module of one-level receiving system) output is divided into multichannel intermediate-freuqncy signal, and export described multichannel intermediate-freuqncy signal to cavity filtration module group 122 by multiplexer channel; Described cavity filtration module group 122, for carrying out frequency range division to receiving Mei road intermediate-freuqncy signal, and exports the intermediate-freuqncy signal after frequency range division to square law detection module group 123; Described square law detection module group 123, for carrying out square law detection to receiving frequency range division Hou Mei road intermediate-freuqncy signal, controls the bandwidth of output with the voltage signal of sky temperature information; Described video amplifier module 124, for amplifying receiving the voltage signal with sky temperature information that square law detection module group 123 exports, and export the described voltage signal after amplifying to weather information acquisition device, so that weather information acquisition device can collect described voltage signal.

Optionally, described cavity filtration module group can comprise multiple cavity body filters, and each cavity body filter can be seven rank elliptic cavity fluid filters; Described square law detection module group can comprise multiple wave detectors, and each wave detector is diode detector; Described video amplifier module can comprise: the two-stage calculation amplifier of cascade; But be not limited to this.

Optionally, the number of described 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 from the number of wave detector, and the present embodiment is not restricted.

Also refer to Fig. 3, a kind of theory structure schematic diagram of the high spectrum receiver of a kind of microwave providing for the embodiment of the present invention, in this embodiment, the high spectrum receiver of described microwave comprises: one-level receiving system and secondary receiving system, wherein, one-level receiving system is taking one-level receiver 31 as example, and secondary receiving system is taking secondary receiver 32 as example, but is not limited to this.

Wherein, the structure of described one-level receiver 31 can be superheterodyne receiver structure, for the faint high-frequency signal of antenna input is carried out to frequency range division, then, frequency range is divided to enough powerful intermediate-freuqncy signals that changes into of rear faint high-frequency signal, and described intermediate-freuqncy signal is exported to secondary receiver 32.Described one-level receiver 31 specifically comprises: high frequency amplifying module 311, noise of image filtration module 312, down conversion module 313 and intermediate frequency amplification module 314.

The structure of described secondary receiver 32 is multichannel receiver array structures, comprises power splitter 321, cavity body filter group 322, square law geophone group 323 and video amplifier module 324.That is to say, the high-power intermediate-freuqncy signal of exporting through one-level receiver 31 is divided into different passages after power splitter 321 and cavity body filter group 322, then after square law geophone group 323 and video amplifier module 324, output with the voltage signal of sky temperature information to AD acquisition module, so that AD acquisition module gathers the voltage signal with sky temperature information.

Wherein, in this embodiment, this high frequency amplifying module 311 can comprise Waveguide coaxial conversion and high-frequency low-noise acoustic amplifier, and the conversion of described Waveguide coaxial is made up of rectangular waveguide interface and coaxial interface, for being the coaxial interface of one-level receiver by the rectangular waveguide interface conversion of reception antenna; High-frequency low-noise acoustic amplifier adopts dual-stage amplifier cascade structure, and its high-frequency low noise amplifier circuit can be realized with LNA chip, but is not limited to this.That is to say, high frequency amplifying module is for receiving and amplify the faint high-frequency signal (being ultra-weak electronic signal) of reception antenna output.

This noise of image filtration module 312, carries out filtering for the extra noise component that high frequency amplifying module 31 is produced; And the signal that will export to down conversion module 313 is carried out to pre-filtering, suppress noise of image.Specifically comprise the first microwave switch 3121, band-pass filter group 3122 (comprising multiple band pass filters) and the second microwave switch 3123.

Wherein, the first microwave switch 3121 is connected with the each band pass filter in high frequency amplifying module 311 and band-pass filter group 3122, each band pass filter in described band-pass filter group 3122 is also connected with the second microwave switch 3123, and the second microwave switch 3123 is connected with intermediate frequency amplification module 314.In this embodiment, described band-pass filter group 3122 (comprising multiple band pass filters) can adopt microstrip filter structure, and type is 7 rank Chebyshev's band pass filters, but is not limited to this.

The control signal that described noise of image filtration module 312 sends by the frequency synthesizer 3131 receiving in down conversion module 313 is controlled the state of the first microwave switch 3121 and/or the second microwave switch 3123, can enter in cavity body filter suitable in secondary receiver 32 thereby make high frequency amplifying module 311 export high-frequency signal.Wherein, described microwave switch can be SP10T switch chip, certainly, can be also other chips with this function, and this example is not restricted.In this embodiment, the input/output interface between each device is coaxial interface.

In this embodiment, this down conversion module 313 is selected single-side belt down-conversion structure, for the high-frequency signal of 311 outputs of High frequency amplification mould is carried out to frequency range division, and the high-frequency signal of frequency range after dividing be converted to intermediate-freuqncy signal, and intermediate-freuqncy signal is outputed in intermediate frequency amplification module 314.Specifically comprise low-converter 3131 and frequency synthesizer 3132.

Wherein, described low-converter 3131 comprises double balanced mixer and band pass filter; Described double balanced mixer can mixing chip; Band pass filter can adopt LC filter construction, and its type is 5 rank Chebyshev's band pass filters, but is not limited to this.That is to say, low-converter 3131 carries out filtering for the additional noise that double balanced mixer is brought; The local oscillation signal for the treatment of mixed frequency signal and frequency synthesizer output that is input as high frequency amplifying module output of low-converter, output intermediate-freuqncy signal is to intermediate frequency amplification module 314.

In a kind of embodiment, described frequency synthesizer 3132 can comprise phase-locked module and times frequency module; Described frequency synthesizer 3132 is for providing low-converter 3131 required local oscillation signal.

Wherein, described phase-locked module adopts phase-locked loop structures, comprises reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, and the function and efficacy of its each device to those skilled in the art, has been to know technology, does not repeat them here.The reference frequency that described reference frequency source can be provided by the temperature compensating crystal oscillator on 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 etc. of producing such as Hittite company).The output frequency of frequency synthesizer is adjusted by the frequency dividing ratio of digital frequency divider in phase-locked module, and frequency step equals the reference frequency of reference frequency source.Phase-locked module arrives intermediate-frequency band for the reference frequency frequency multiplication that the reference frequency source of low frequency is provided.

Times frequency module adopts super large bandwidth two-way frequency multiplication structure, comprises the first varactor doubler, the first single-pole double-throw switch (SPDT), the second single-pole double-throw switch (SPDT), the first band pass filter, the second varactor doubler, the second band pass filter, this vibration magnifier and low pass filter; Wherein, described the first band pass filter and the second varactor doubler form high frequency frequency multiplication path, and the logical frequency multiplier of the second band forms low frequency frequency multiplication path, and the function and efficacy of its all parts and connecting relation thereof refer to above-mentioned, do not repeat them here.

Described intermediate frequency amplification module 314 is made up of intermediate frequency low noise amplifier and low pass filter.Intermediate frequency low noise amplifier adopts third stage amplifier cascade structure, and amplifier circuit is LNA chip.Low pass filter adopts LC filter construction, and type is 5 rank chebyshev low-pass filters, the extra noise component that it is produced for leaching intermediate frequency low noise amplifier.Intermediate frequency amplification module, for receiving and amplify the intermediate-freuqncy signal of down conversion module output, is then exported to secondary receiver.

Wherein, described power splitter 321 is divided for the intermediate-freuqncy signal constant power that one-level receiver is exported, and exports to cavity body filter group, wherein, power splitter 321 can adopt Wilkinson microstrip power divider structure, is made up of microstrip line and the microwave resistance of Wilkinson structure.The making material of microstrip line is copper, is positioned on AD1000 microwave sheet material; Microwave resistance is selected the microwave resistance of 50 ohm.

This cavity body filter group 322 (comprising multiple cavity body filters), for the intermediate-freuqncy signal receiving is carried out to frequency range division, then the intermediate-freuqncy signal after frequency range division is exported to square law geophone group.Wherein, this cavity body filter group 322 can adopt 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, described resonant cavity is selected coaxial cavity structure, and described tuning screw is made with iron and fixed with conducting resinl.

This square law geophone group 323 (comprising multiple square law wave detectors) adopts diode detection structure, utilizes the square law detection region of diode, completes the square law detection function under small-signal.Specifically comprise detector diode, build-out resistor and video electric capacity.Wherein, described detector diode can adopt zero offset Schottky diode structure, such as HSMS282K detector diode etc.Build-out resistor is connected in parallel on detector diode front end, for realizing the Broadband Matching of the square law input impedance of detector.Video Capacitance parallel connection is in detector diode rear end, for controlling the bandwidth of 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 amplifier module 324, for being amplified to voltage signal in the dynamic range of AD collection, so that AD gathers this voltage signal.Wherein, video amplifier module 324 adopts two-stage calculation amplifier cascade structure, and in order to ensure enough large input impedance, thereby the voltage signal of square law geophone group output can enter into video amplifier module completely.Described operational amplifier can be op777 chip etc., because the output voltage of square law geophone group is very little, so video amplifier module need to be amplified to voltage signal in the dynamic range of AD collection.

From above-described embodiment, in this embodiment, one-level receiver selects two-stage structure for amplifying to avoid the self-oscillation phenomenon under high-gain.One-level receiver, by switching the output signal frequency of down conversion module medium frequency synthesizer, carries out frequency range rough segmentation for the first time, and frequency range is divided serial implementation in chronological order, has reduced system complexity; And secondary receiver has been set up the linear relationship between atmospheric radiation power and voltage signal by square law geophone group, make the two-point calibration of radiometer become possibility.Be that secondary receiver carries out frequency range segmentation for the second time by cavity body filter group, frequency range is divided Parallel Implementation simultaneously, has reduced sky Measuring Time.

Therefore the passage that, the embodiment of the present invention has realized under atmospheric radiation high spectrum resolution is divided; Meet the requirement of lightweight, low-power consumption and low complex degree; And the requirement of Quick Measurement atmosphere.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 present 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
Full tunnel Measuring Time	< 0.1 second

For the ease of those skilled in the art's understanding, first face will be taking the high spectrum receiver of K band microwave as example, introduces in detail explanation technical scheme of the present invention.

The high spectrum receiver of K band microwave is a kind of for K wave band.18～26GHz frequency range is evenly divided into 100 passages by receiver, by measuring respectively the incident power of each passage, sets up the linear relationship between atmospheric radiation power and output voltage, provides the power spectral line of atmospheric radiation in 18～26GHz frequency range.

Optionally, the microwave receiver of the high spectral radiometer of described 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 by connected digital processing and system control unit; This microwave receiver unit can be integrated in constant temperature unit, for reducing the gain fluctuation of the high spectrum receiver unit of microwave, improves radiometer sensitivity.

The Multi-channel microwave receiver that the high spectrum receiver of K band microwave is a kind of two-stage cascade structure, the Multi-channel 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 one-level receiver described in the present embodiment is superheterodyne receiver structure, comprises high frequency amplifying module, noise of image filtration module, down conversion module and intermediate frequency amplification module, and the function and efficacy of its modules refers to above-mentioned, does not repeat them here.

In this embodiment, high frequency amplifying module is made up of Waveguide coaxial conversion and high-frequency low-noise acoustic amplifier.Waveguide coaxial conversion is made up of rectangular waveguide interface and coaxial interface, for the coaxial interface that is receiver by the rectangular waveguide interface conversion of reception antenna; High-frequency low-noise acoustic amplifier adopts dual-stage amplifier cascade structure, and amplifier circuit can be realized by 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.High frequency amplifying module is 18～26GHz for the frequency that receives reception antenna output, the ultra-weak electronic signal of be less than-130dBm of power, and power amplification is outputed to noise of image filtration module after-78dBm.The technical indicator of high frequency amplifying module is as shown in table 2.

Table 2

High frequency amplifying module parameter	Technical indicator
		Gain	>50dB
Noise factor	<3.0dB
		Power Dynamic Range	<2.0dB

This noise of image filtration module comprises microwave switch and band pass filter, the control signal that it sends by reception down conversion module frequency synthesizer is controlled (such as the corresponding microwave switch of frequency of each frequency synthesizer microwave switch state, 10 frequencies altogether, so there is switch to have 10 ports) thus make the output signal of high frequency amplifying module can enter suitable cavity body filter.Microwave switch can be realized based on SP10T switch chip, is less than 10ms switching time, and input/output interface is coaxial interface.Band-pass filter group adopts microstrip filter structure, and type is 7 rank Chebyshev's band pass filters, and bandwidth is 800MHz.The function of noise of image filtration module: carry out filtering for the extra noise component that high frequency amplifying module is produced; And the signal that will export to down conversion module is carried out to pre-filtering, suppress noise of image.The technical indicator of noise of image filtration module as shown in Listing 3.

Table 3

This down conversion module is selected single-side belt down-conversion structure, comprises low-converter and frequency synthesizer.

Wherein, described low-converter is made up of double balanced mixer and band pass filter.Double balanced mixer is realized based on HMC292 mixing chip, and conversion loss is 8dB, and between radiofrequency signal and local oscillation signal, isolation is 36dB; Band pass filter adopts LC filter construction, and type is 5 rank Chebyshev's band pass filters, and centre frequency is 2GHz, and bandwidth is 1GHz, and Out-of-band rejection is 25dB.It carries out filtering for the additional noise that double balanced mixer is brought.The local oscillation signal for the treatment of mixed frequency signal and frequency synthesizer output that is input as high frequency amplifying module output of low-converter, output intermediate-freuqncy signal is to intermediate frequency amplification module.

Described frequency synthesizer comprises phase-locked module and times frequency module, and it is for providing low-converter required local oscillation signal, and a kind of principle mechanism schematic diagram of its frequency synthesizer as shown in Figure 4.

In Fig. 4, described frequency synthesizer comprises: phase-locked module 41 and times frequency module 42, wherein, described phase-locked 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 temperature compensating crystal oscillator, and for reference frequency is provided, reference frequency is 20MHz; Described digital frequency divider 412 and phase discriminator 413 can be integrated in AD4107 chip; Described voltage controlled oscillator 414 is selected HMC587LC4B model.The output frequency of frequency synthesizer is adjusted by the frequency dividing ratio of digital frequency divider in phase-locked module, and frequency step equals the reference frequency 20MHz of reference frequency source.The output frequency of frequency synthesizer is 5～10GHz, and Hopping time is less than 10ms.Phase-locked module, for arriving intermediate-frequency band by the reference frequency source frequency frequency multiplication of low frequency.

Described times of frequency module 42 adopts super large bandwidth two-way frequency multiplication structure, and described times of frequency module 42 comprises: the first varactor doubler 421, the first single-pole double-throw switch (SPDT) 422, the first band pass filter 423, the second varactor doubler 424, the second band pass filter 425, the second single-pole double-throw switch (SPDT) 426, this vibration magnifier 427 and low pass filter 428; Wherein, described the first band pass filter 423 and the second varactor doubler 424 form low frequency frequency multiplication path, and the second band pass filter forms high frequency frequency multiplication path.

Wherein, first the first varactor doubler 421 carries out frequency multiplication by the output signal of phase-locked module, realizes based on HMC573 frequency multiplication chip; The first single-pole double-throw switch (SPDT) 422 and the second single-pole double-throw switch (SPDT) 426 are realized based on SP2T switch chip respectively, for choosing suitable frequency path, are less than 10ms switching time; High frequency frequency multiplication path is got the high frequency parameter of phase-locked module output by the second band pass filter filter 425, and the second band pass filter 425 can adopt microstrip filter structure, and type is 3 rank Chebyshev's band pass filters, and passband is 18～20GHz; Low frequency frequency multiplication path is by the low frequency parameter of the phase-locked module output of the first band pass filter 423 leaching, and passband is 10～13GHz, then realizes high frequency output by the second varactor doubler 424, and output frequency is 20～26GHz.The first band pass filter can adopt 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 microstrip filter structure, and type is 5 rank chebyshev low-pass filters, and cut-off frequency is 30GHz.The extra harmonic component producing for leaching frequency multiplication path; This vibration magnifier 427 adopts casacade multi-amplifier cascade structure, and circuit is realized based on cha3689 chip.That is to say, the described times of output frequency that frequency module 42 is required according to frequency synthesizer, chooses low frequency or high frequency frequency multiplication path, has realized the output of super large bandwidth local oscillation signal.

Described down conversion module is for the high-frequency signal of high frequency amplifying module output is divided to frequency range, and is converted to intermediate-freuqncy signal and outputs to intermediate frequency amplification module.Shown in the following list 4 of technical indicator of down conversion module.

Table 4

Wherein, this intermediate frequency amplification module comprises intermediate frequency low noise amplifier and low pass filter.Described intermediate frequency low noise amplifier adopts third stage amplifier cascade structure, and amplifier circuit is realized based on HMC374 chip, and single-stage gain amplifier is 13dB, and the gain of intermediate frequency low noise amplifier can reach 39dB; Low pass filter adopts LC filter construction, and type is 5 rank chebyshev low-pass filters, and cut-off frequency is 3.5GHz, the extra noise component that it is produced for leaching intermediate frequency low noise amplifier.Intermediate frequency amplification module, for receiving and amplify the intermediate-freuqncy signal of down conversion module output, is then exported to secondary receiver.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
Out-of-band rejection	>25dBc@1GHz

Hence one can see that, and described one-level receiver selects two-stage structure for amplifying to avoid the self-oscillation phenomenon under 80dB gain.It (is that superheterodyne receiver adopts the mode of down-conversion that reception signal is downconverted to zero intermediate frequency that one-level receiver carries out frequency range rough segmentation for the first time by the output signal frequency of switching down conversion module medium frequency synthesizer, then adopt a fixing required bandwidth of low pass filter leaching, the signal frequency that frequency synthesizer is launched is depended in the selection of frequency range), frequency range is divided serial implementation () in chronological order, has reduced system complexity.The structure of described secondary receiver is multichannel receiver array structure, is made up of power splitter, cavity body filter group, square law geophone group and the several parts of video amplifier module.The power of one-level receiver input is-intermediate-freuqncy signal that 20dBm, frequency are 1.6～2.4GHz, after power splitter and cavity body filter group, be divided into different passages, then after square law geophone group and video amplifier module output with the voltage signal of sky temperature information to AD acquisition module.

This power splitter adopts Wilkinson microstrip power divider structure, is made up of microstrip line and the microwave resistance of Wilkinson structure.The making material of microstrip line is copper, is positioned on 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.Power splitter is divided into ten passages for the intermediate-freuqncy signal constant power that one-level receiver is exported, and exports to cavity body filter group.The technical indicator of this power splitter is as shown in table 6:

Table 6

Power splitter parameter	Technical indicator
		Frequency range	1.6～2.4GHz
Insertion loss	<0.6dB
		Isolation	>20dB
Amplitude balance	<0.3dB
		Standing-wave ratio	<1.3

Wherein, this cavity body filter group adopts 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 coaxial cavity structure, and tuning screw is made with iron and fixed with conducting resinl.Cavity body filter group, for intermediate-freuqncy signal is carried out to frequency range division, is then exported to square law geophone group.The technical indicator of cavity body filter group is as shown in table 7.

Table 7

This square law geophone group adopts diode detection structure, utilizes the square law detection region of diode, completes the square law detection function under small-signal.It is made up of detector diode, build-out resistor and the several parts of video electric capacity.Detector diode adopts zero offset Schottky diode structure, chooses HSMS282K detector diode and realizes.Build-out resistor is connected in parallel on detector diode front end, for realizing the Broadband Matching of the square law input impedance of detector.Video Capacitance parallel connection is in detector diode rear end, for controlling the bandwidth of 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 amplifier module adopts two-stage calculation amplifier cascade structure, and in order to ensure enough large input impedance, thereby the voltage signal of square law geophone group output can enter into video amplifier module completely.Operational amplifier is realized based on op777 chip, because the output voltage of square law geophone group is very little, so video amplifier module is for being amplified to voltage signal in the dynamic range of AD collection.The technical indicator of video amplifier module is as shown in table 9:

Table 9

Video amplifier module parameter	Technical indicator
		Frequency range	0～50MHz
Multiplication factor	> 200 times
		Output voltage	0～3V

Hence one can see that, and described secondary receiver has been set up the linear relationship between atmospheric radiation power and voltage signal by square law geophone group, makes the two-point calibration of radiometer become possibility.Secondary receiver carries out frequency range segmentation for the second time by cavity body filter group, and frequency range is divided Parallel Implementation simultaneously, has reduced sky Measuring Time.

In the embodiment of the present invention, described one-level receiver carries out frequency range rough segmentation for the first time by the output signal frequency that switches down conversion module medium frequency synthesizer, and frequency range is divided serial implementation in chronological order, has reduced system complexity; Secondary receiving system has been set up the linear relationship between atmospheric radiation power and voltage signal by square law geophone group, makes the two-point calibration of radiometer become possibility.Secondary receiving system carries out frequency range segmentation for the second time by cavity body filter group, and frequency range is divided Parallel Implementation simultaneously, has reduced sky Measuring Time.

Based on above-mentioned implementation procedure, the embodiment of the present invention also provides a kind of microwave high spectrum method of reseptance, and as shown in Figure 5, described method comprises its flow chart:

Step 501: the high-frequency signal of reception antenna input;

Step 502: described high-frequency signal is carried out to frequency range division;

Step 503: the described high-frequency signal that frequency range is divided down-converts to the first intermediate-freuqncy signal, amplifies described the first intermediate-freuqncy signal; Specifically comprise:

Generate local oscillation signal; The described high-frequency signal of described frequency range being divided according to described local oscillation signal carries out down-converted, obtains the first intermediate-freuqncy signal.

Step 504: described the first intermediate-freuqncy signal constant power after amplifying is divided into multichannel intermediate-freuqncy signal;

Step 505: described multichannel intermediate-freuqncy signal Zhong Mei road intermediate-freuqncy signal is carried out carrying out square law detection after frequency range division, obtain the voltage signal with sky temperature information, and amplify the described voltage signal of output.

That is to say, in this embodiment, one-level receiver receives and amplifies the high-frequency signal of reception antenna input; The extra noise component producing in amplification process is carried out to filtering, and the high-frequency signal that will export is carried out to pre-filtering to suppress noise of image; And the high-frequency signal of exporting afterwards is after filtering carried out to frequency range by tuning local frequency and divide for the first time, and be converted to intermediate-freuqncy signal; And amplify described intermediate-freuqncy signal, and export described intermediate-freuqncy signal to secondary receiver.Afterwards, described the first intermediate-freuqncy signal constant power receiving is divided into multichannel intermediate-freuqncy signal by secondary receiver, and described multichannel intermediate-freuqncy signal Zhong Mei road intermediate-freuqncy signal is carried out carrying out square law detection after frequency range division, obtain the voltage signal with sky temperature information, amplify and export described voltage signal, that is to say, the intermediate-freuqncy signal of process power divider is carried out to the frequency range secondary division that multichannel walks abreast simultaneously; Receive the signal of telecommunication of dividing through frequency range secondary, set up the linear relationship of the monitored index of atmosphere and voltage signal, and output characterizes the voltage signal of the monitored index of atmosphere; Output after described voltage signal is amplified.

The high spectrum method of reseptance of microwave that the present embodiment provides, mode by tuning local frequency in chronological order serial implementation frequency range is divided for the first time, system complexity is reduced greatly, carrying out multichannel frequency range secondary divides again, Parallel Implementation simultaneously, reduce System trace time, can grasp rapidly in time atmospheric condition.

The 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 implementation in chronological order, has reduced the complexity of system; Second level receiving system frequency range is divided Parallel Implementation simultaneously, has reduced System trace time.

In this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.

Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in some part of each embodiment of the present invention or embodiment.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (7)

1. the high spectrum receiver of microwave, it is characterized in that: comprise one-level receiving system and secondary receiving system, wherein, described one-level receiving system, for the high-frequency signal of reception antenna input, described high-frequency signal is carried out to frequency range division, and the described high-frequency signal that frequency range is divided down-converts to the first intermediate-freuqncy signal, amplify described the first intermediate-freuqncy signal of output to described secondary receiving system, described one-level receiving system comprises:

High frequency amplifying module, described high frequency amplifying module is for the high-frequency signal of reception antenna input, and amplify and export described high-frequency signal,

Noise of image filtration module, described noise of image filtration module carries out filtering for the extra noise component that high frequency amplifying module is produced, the high-frequency signal that will export to down conversion module is carried out to pre-filtering, suppress noise of image, and receive the control signal sent of down conversion module, export in corresponding cavity body filter according to high-frequency signal described in described control signal control

Down conversion module, described down conversion module, for receiving the high-frequency signal after the pre-filtering of described noise of image filtration module, is carried out frequency range division to described high-frequency signal, and the described high-frequency signal that frequency range is divided carries out down-converted, obtain the first intermediate-freuqncy signal, export described the first intermediate-freuqncy signal

Intermediate frequency amplification module, described intermediate frequency amplification module, for receiving and amplifying described the first intermediate-freuqncy signal, is exported the first intermediate-freuqncy signal of described amplification to described secondary receiving system,

Wherein, described down conversion module comprises:

Frequency synthesizer, described frequency synthesizer is used for generating the local oscillation signal of different frequency, and exports described local oscillation signal to described low-converter; And generation control signal, export described control signal to described noise of image filtration module,

Low-converter, described low-converter, for according to described local oscillation signal, the high-frequency signal of described high frequency amplifying module output being carried out to down-converted, obtains the first intermediate-freuqncy signal, and described the first intermediate-freuqncy signal is exported to intermediate frequency amplification module,

Wherein, described frequency synthesizer comprises:

Phase-locked module, the reference frequency frequency multiplication that described phase-locked module is used for the reference frequency source of low frequency to provide is to intermediate-frequency band;

Times frequency module, described times of frequency module is for the required output frequency according to frequency synthesizer, choose low frequency frequency multiplication path or high frequency frequency multiplication path according to described reference frequency, output meets the local oscillation signal of pre-set bandwidths, described times of frequency module comprises: the first varactor doubler, the first single-pole double-throw switch (SPDT), the second single-pole double-throw switch (SPDT), the first band pass filter, the second varactor doubler, the second band pass filter, this vibration magnifier and the first low pass filter, described the first band pass filter and the second varactor doubler form low frequency frequency multiplication path, the second band pass filter forms high frequency frequency multiplication path, wherein,

Described the first varactor doubler, for the output signal of described phase-locked module is carried out to frequency multiplication,

Described the first single-pole double-throw switch (SPDT), exports described the first band pass filter or the second band pass filter to for the signal of controlling described the first varactor doubler output,

Described the first band pass filter, receives the low frequency signal of signal, and exports described low frequency signal to described the second varactor doubler for leaching,

Described the second varactor doubler carries out exporting described the second single-pole double-throw switch (SPDT) to after frequency multiplication to the low frequency signal receiving,

Described the second band pass filter, for the high-frequency signal of phase-locked module output described in leaching, and exports described high-frequency signal to described the second single-pole double-throw switch (SPDT),

Described the second single-pole double-throw switch (SPDT), for control described second varactor doubler send signal or described second band pass filter send signal export this vibration magnifier to,

Described vibration magnifier, for receiving and amplify the local oscillation signal of described the second single-pole double-throw switch (SPDT) input,

Described the first low pass filter, the extra noise component producing for low frequency frequency multiplication path described in filtering or high frequency frequency multiplication path, output local oscillation signal is to described low-converter;

Described secondary receiving system, for receiving described the first intermediate-freuqncy signal after amplification, described the first intermediate-freuqncy signal constant power is divided into multichannel intermediate-freuqncy signal, and described multichannel intermediate-freuqncy signal Zhong Mei road intermediate-freuqncy signal is carried out carrying out square law detection after frequency range division, obtain the voltage signal with sky temperature information, amplify and export described voltage signal.

2. the high spectrum receiver of microwave according to claim 1, is characterized in that, described high frequency amplifying module comprises Waveguide coaxial transition components and high-frequency low-noise acoustic amplifier;

Described Waveguide coaxial transition components, for being converted to coaxial interface by the Waveguide interface of described reception antenna;

Described high-frequency low-noise acoustic amplifier, for amplifying by the high-frequency signal of described coaxial interface reception antenna input.

3. the high spectrum receiver of microwave according to claim 1, it is characterized in that: described noise of image filtration module comprises: the first microwave switch, the second microwave switch, and multiple multistage band pass filters, wherein, one end of each multistage band pass filter is connected with the first microwave switch, the other end is connected with the second microwave switch, described the first microwave switch is also connected with high frequency amplifying module and frequency synthesizer, and described the second microwave switch is also connected with low-converter and frequency synthesizer in down conversion module; The Kai Heguan of the first microwave switch, and the Kai Heguan of the second microwave switch, be subject to the control of the control signal of described frequency synthesizer output.

4. the high spectrum receiver of microwave according to claim 1, is characterized in that, described phase-locked module comprises: reference frequency source, digital frequency divider, phase discriminator and voltage controlled oscillator, wherein,

Described reference frequency source, for providing the reference frequency of standard;

Described digital frequency divider, for different frequency dividing ratios are provided, the reference frequency providing taking described reference frequency source is frequency step, controls the output frequency of described voltage controlled oscillator under described phase discriminator coordinates.

5. the high spectrum receiver of microwave according to claim 1, is characterized in that, described intermediate frequency amplification module comprises intermediate frequency low noise amplifier and the second low pass filter;

Described intermediate frequency low noise amplifier, for amplifying the intermediate-freuqncy signal of being exported by described down conversion module;

Described the second low pass filter, the extra noise component producing for filtering described intermediate frequency low noise amplifier.

6. according to the high spectrum receiver of the microwave described in claim 1 to 5 any one, it is characterized in that, described secondary receiving system comprises:

Merit sub-module, for the first intermediate-freuqncy signal constant power of one-level receiving system output is divided into multichannel intermediate-freuqncy signal, and exports described multichannel intermediate-freuqncy signal to cavity filtration module group by multiplexer channel;

Cavity filtration module group, for carrying out frequency range division to receiving Mei road intermediate-freuqncy signal, and exports the intermediate-freuqncy signal after frequency range division to square law detection module group;

Square law detection module group, for carrying out square law detection to receiving frequency range division Hou Mei road intermediate-freuqncy signal, controls the bandwidth of output with the voltage signal of sky temperature information;

Video amplifier module, for the voltage signal that receives the output of square law detection module group is amplified, and exports the voltage signal after amplifying to weather information acquisition device.

7. the high spectrum receiver of microwave according to claim 6, is characterized in that:

Described cavity filtration module group comprises multiple cavity body filters, and each cavity body filter is seven rank elliptic cavity fluid filters;

Described square law detection module group comprises multiple wave detectors, and each wave detector is diode detector; Wherein, the number of described cavity body filter and wave detector is identical;

Described video amplifier module comprises: the two-stage calculation amplifier of cascade.