CN105429654B - A kind of S-band wave observation radar frequency synthesizer - Google Patents

A kind of S-band wave observation radar frequency synthesizer Download PDF

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Publication number
CN105429654B
CN105429654B CN201510974896.8A CN201510974896A CN105429654B CN 105429654 B CN105429654 B CN 105429654B CN 201510974896 A CN201510974896 A CN 201510974896A CN 105429654 B CN105429654 B CN 105429654B
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frequency
generation module
local oscillator
signal
output
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CN105429654A (en
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陈泽宗
陈曦
赵晨
张龙刚
贺超
罗宇
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Wuhan University WHU
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Wuhan University WHU
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0491—Circuits with frequency synthesizers, frequency converters or modulators

Abstract

The present invention provides a kind of S-band wave observation radar frequency synthesizer, including the first local oscillator generation module, radio frequency generation module, 740MHz amplification modules and the second local oscillator generation module；740MHz amplification modules export two paths of signals, wherein connecing radio frequency generation module all the way, another way connects the second local oscillator generation module；Radio frequency generation module is connected with the first local oscillator generation module, 740MHz amplification modules respectively, and the second local oscillator generation module is connected with 740MHz amplification modules.The present invention can realize that by four output signals export after frequency synthesis caused by S-band wave observation radar isochronous controller be three stable radiofrequency signals, a radiofrequency signal wherein is provided for S-band wave observation radar transmitter, two local oscillation signals are provided for radar simulation front end.

Description

A kind of S-band wave observation radar frequency synthesizer
Technical field
The present invention relates to microwave Doppler Radar Technology field, more particularly to a kind of S-band wave observation radar frequency synthesizer.
Background technology
Microwave Doppler wave observation radar is that one kind is based on doppler principle, by the track for continuously measuring all directions water particle Speed and echo strength, the New Type Radar of ocean wave spectrum and ocean wave parameter is obtained using linear ocean wave theory.The measurement accuracy of radar Height, antenna volume is small, environmental disturbances are few, it is easy to accomplish the round-the-clock measurement in real time of wave.Meanwhile microwave Doppler wave observation radar With higher resolution ratio, the detailed information on sea can be accurately reflected, ocean environment observation, oceanographic survey and Marine Sciences are ground Studying carefully has important value, is with a wide range of applications.Therefore, many countries are all actively developing microwave Doppler Radar Sea Unrestrained e measurement technology, and as the important component in oceanographic observation system.However, it is used for marine environmental monitoring S-band The frequency synthesis technique of wave observation radar, is the important technical links in the type radar design process of hardware, it is both transmitter Exciting signal source, and the local oscillator of receiver, the design hardware approach of high efficiency, low cost increasingly ground Study carefully the attention of personnel.
At present, actual frequency combining apparatus mainly uses four kinds of technologies：Direct analog synthesis method, phaselocked loop synthetic method, Direct digital synthesizers method and phaselocked loop and digit synthesis associated methods.Wherein direct analog synthesis method using frequency multiplication, frequency dividing and Filtering produces multiple required frequencies from single-frequency, and the frequency switching time of this method is fast, but volume is big, power consumption is big；Lock Phase ring synthetic method mutually completes all kinds of computings of frequency by locking, and the structure of this method is simplified, easy to integrated, and the purity of frequency spectrum is high, But there are the contradiction between high-resolution and conversion time；Direct digital synthesis technique utilizes computer technology, its method point Resolution is high, and conversion time is short, and output factors letter is few, but is that cost is higher the shortcomings that this method, and cannot accomplish optional frequency Synthesis, it is impossible to directly produce the signal of S-band；The basic principle for the method that Direct Digital Frequency Synthesizers and phaselocked loop combine It is that the signal of certain frequency is first produced with Direct Digital Frequency Synthesizers, then the signal of higher frequency is generated by phaselocked loop, should Method can produce the signal of assigned frequency, the drawback is that phase noise is larger, device is more, complex circuit.
The content of the invention
The technical problems to be solved by the invention overcome the deficiencies of the prior art and provide a kind of S-band wave observation radar Frequency synthesizer.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of S-band wave observation radar frequency synthesizer, including the first local oscillator generation module, radio frequency generation module, 740MHz Amplification module and the second local oscillator generation module；
The input terminal of the first local oscillator generation module is used to input simple signal F1, the first local oscillator generation module Output terminal is divided into two-way, wherein export sine wave signal LO1 all the way, to the AFE(analog front end) of S-band wave observation radar, as its first Local oscillation signal, another way connect the first input end of radio frequency generation module；The input terminal of the 740MHz amplification modules is used to input Simple signal F3, the output terminal of the 740MHz amplification modules is divided into two-way, wherein connect radio frequency generation module all the way second is defeated Enter end, another way connects the first input end of the second local oscillator generation module；3rd input terminal of the radio frequency generation module is used for defeated Enter linear frequency modulation and interrupt continuous wave signal F2, the output terminal of the radio frequency generation module is used to export linear FM interrupt continuous wave Signal RF launches to the transmitter of S-band wave observation radar；Second input terminal of the second local oscillator generation module is used for input line Property CW with frequency modulation signal F4, the second local oscillator generation module output terminal output linear frequency modulation continuous wave signal LO2, to S The AFE(analog front end) of wave band wave observation radar, as its second local oscillation signal.
Wherein, the first local oscillator generation module, includes sequentially connected amplifier, one from input terminal to output terminal A bandpass filter, a Π type resistors match network and a power splitter, wherein, the input terminal input of the amplifier is Simple signal F1, one of output terminal output of the power splitter is sine wave signal LO1, to S-band wave observation radar AFE(analog front end), as its first local oscillation signal, another exports the first input end for connecing radio frequency generation module；
The radio frequency generation module, includes sequentially connected first frequency mixer, first band from input terminal to output terminal Bandpass filter, Π type resistors match network, first amplifier, second frequency mixer, second bandpass filter, second put Big device and the 3rd bandpass filter, wherein, two input terminals of first frequency mixer are produced respectively as the radio frequency 3rd input terminal of module and the second input terminal, for input linear FM interrupt continuous wave signal F2 and 740MHz amplification module Output signal, the first input end of the wherein input terminal of second frequency mixer as the radio frequency generation module, is used In accessing the first local oscillator generation module, the output of the output terminal of the 3rd bandpass filter as the radio frequency generation module End, launches for exporting linear FM interrupt continuous wave signal RF to the transmitter of S-band wave observation radar；
The 740MHz amplification modules, include a sequentially connected amplifier, a sound table from input terminal to output terminal Wave filter, a Π type resistors match network and a power splitter, wherein, the input terminal input of the amplifier is single-frequency letter Number F3, two output terminals of the power splitter are respectively connected to the second input terminal and the second local oscillator generation module of radio frequency generation module First input end；
The second local oscillator generation module, includes sequentially connected first amplifier, first from input terminal to output terminal A bandpass filter, frequency mixer, Π type resistors match network, second bandpass filter, second amplifier and the 3rd band Bandpass filter, wherein, the second input terminal of the input terminal of first amplifier as the second local oscillator generation module, is used In input linear CW with frequency modulation signal F4, another input terminal of the frequency mixer as the second local oscillator generation module One input terminal, for accessing 740MHz amplification modules, the output terminal of the 3rd bandpass filter is as second local oscillator The output terminal of generation module, for exporting linear frequency modulation continuous wave signal LO2, to the AFE(analog front end) of S-band wave observation radar, as Its second local oscillation signal.
Wherein, four input signals of the frequency synthesizer are respectively 1 caused by S-band wave observation radar signal source Linear frequency modulation continuous wave signal F4,1 linear frequency modulation interrupt continuous wave signal F2 and 2 simple signals, are respectively simple signal F1 and simple signal F3；
The simple signal F1 is sine wave signal, and frequency 2170-2370MHz, power is -6dBm；
The simple signal F3 is sine wave signal, and frequency 740MHz, power is -4dBm；
The centre frequency of the linear frequency modulation continuous wave signal F4 is 201.5MHz, bandwidth 30MHz, power for- 24dBm；
The centre frequency that the linear frequency modulation interrupts continuous wave signal F2 be 160MHz, bandwidth 30MHz, power is- 13dBm；
Wherein, the simple signal F1 and simple signal F3 of input can be irrelevant.
Wherein, four input signals of the frequency synthesizer pass through the frequency synthesizer, and one frequency of output is （2750-2950）The linear frequency modulation of ± 15MHz interrupts continuous wave signal RF to be launched to the transmitter of S-band wave observation radar, described The bandwidth that linear frequency modulation interrupts continuous wave signal RF is 30MHz, power 0dBm；One frequency of output is 2170-2370MHz's Sine wave signal LO1, to the AFE(analog front end) of S-band wave observation radar, as its first local oscillation signal, its power is+7dBm；Output One frequency is the linear frequency modulation continuous wave signal LO2 of 538.5MHz, to the AFE(analog front end) of S-band wave observation radar, as its Two local oscillation signals, its bandwidth are 30MHz, power 7dBm.
Wherein, in the first local oscillator generation module, the amplifier uses GALI-84+, its gain >=18dB, makes an uproar Sonic system number≤4.5, export 3 rank sections >=34dB；
The bandpass filter uses BFCN-2275+, the free transmission range 2170-2380MHz of Mini-Circuits companies, Loss≤3dB, stopband attenuation >=30dB；
The power splitter uses SP-2U2+, frequency range 1720-2850MHz, Insertion Loss≤4dB, isolation >=20dB, phase Position imbalance≤1o, amplitude imbalance≤0.2dB；
The power of the simple signal F1 of the first local oscillator generation module input is -6dBm, adjusts the first local oscillator production Raw mould Π types resistors match network in the block make the two paths of signals power of the first local oscillator generation module output be 7 ± 1dBm。
Wherein, in the 740MHz amplification modules, the amplifier uses GALI-74+, its gain >=24dB, noise Coefficient≤3, export 3 rank sections >=35dB；
The SAW filter uses CF740, its centre frequency 740MHz, three dB bandwidth >=7MHz, Insertion Loss≤4dB, passband Fluctuation≤1dB, stopband suppression >=40dB；
The power splitter uses JPS-2-900, frequency range 400-900MHz, Insertion Loss≤2dB, isolation >=18dB, phase Position imbalance≤1o, amplitude imbalance≤0.5dB；
The power of the simple signal F3 of the 740MHz amplification modules input is -4dBm, adjusts the 740MHz amplifications mould Π types resistors match network in the block makes the two paths of signals power of the 740MHz amplification modules output be 7 ± 1dBm.
Wherein, in the second local oscillator generation module, first amplifier uses GALI-74+, and its gain >= 24dB, noise coefficient≤3, export 3 rank sections >=35dB；
First bandpass filter uses RBP-204+, free transmission range 175-237MHz, loss≤3dB, and stopband declines Subtract >=35dB；
The frequency mixer uses ADE-4, radio-frequency head frequency range 200-1000MHz, local oscillator end frequency range 200- 1000MHz, medium frequency output end frequency range DC-800MHz, conversion loss≤8dB, isolation >=40dB；
Second amplifier uses GALI-84+, its gain >=18dB, noise coefficient≤4.5, and 3 rank sections of output >= 34dB；
Second bandpass filter and the 3rd bandpass filter use SXBP-507+, free transmission range 460-560MHz, Loss≤2dB, stopband attenuation >=20dB；
The power of the linear frequency modulation continuous wave signal F4 of second local oscillator generation module input is -24dBm, described in adjustment Π type resistors match networks in second local oscillator generation module make the linear tune of the second local oscillator generation module output terminal output The power of frequency continuous wave signal LO2 is 7 ± 1dBm.
Wherein, in the radio frequency generation module, first frequency mixer uses ADE-4, radio-frequency head frequency range 200-1000MHz, local oscillator end frequency range 200-1000MHz, medium frequency output end frequency range DC-800MHz, conversion loss≤ 8dB, isolation >=40dB；
First bandpass filter uses BPF-A580+, free transmission range 520-640MHz, loss≤4dB, and stopband declines Subtract >=40dB；
First amplifier uses GALI-74+, gain >=24dB, noise coefficient≤3, and 3 rank sections of output >= 35dB；
Second frequency mixer uses ADE-18W, radio-frequency head frequency range 1750-3500MHz, local oscillator end frequency range 1750-3500MHz, medium frequency output end frequency range DC-700MHz, conversion loss≤7dB, the isolation of local oscillator radio-frequency head >= 20dB；
Second amplifier uses GALI-24+, its gain >=18dB, noise coefficient≤4.5, and 3 rank sections of output >= 34dB；
Second bandpass filter and the 3rd bandpass filter use the BFCN- of Mini-Circuits companies 2850+, free transmission range 2750-2950MHz, loss≤4dB, stopband attenuation >=20dB；
Adjusting the Π type resistors match networks in the radio frequency generation module exports the radio frequency generation module output terminal Linear frequency modulation to interrupt the power of continuous wave signal RF be 0 ± 1dBm.
Wherein, the simple signal F3 that frequency is 740MHz and power is -4dBm first passes around 740MHz amplification modules, exports The simple signal that two-way frequency is 740MHz and power is+7dBm, is sent to radio frequency generation module respectively and the second local oscillator produces mould Block；
The simple signal F1 that frequency range is 2170 ~ 2370MHz and power is -6dBm passes through the first local oscillator generation module, The simple signal that two-way frequency range is 2170 ~ 2370MHz and power is+7dBm is exported, wherein being sent to radio frequency all the way produces mould Block, another way export first local oscillation signals of the sine wave signal LO1 as S-band wave observation radar AFE(analog front end)；
The second local oscillator generation module has two-way input signal, be the exterior swept frequency range sent all the way for 201.5 ± The linear frequency modulation continuous wave signal F4 of 15MHz, another way be 740MHz amplification modules output 740MHz and power be+7dBm Simple signal, after the second local oscillator generation module mixing, amplification, filtering, output swept frequency range is 538.5 ± 15MHz, work( Rate is the linear frequency modulation continuous wave signal LO2 of+7dBm, to the AFE(analog front end) of S-band wave observation radar, is believed as its second local oscillator Number；
The radio frequency generation module has three tunnel input signals, is that the exterior swept frequency range sent is 160 ± 15MHz all the way Linear frequency modulation interrupts continuous wave signal F2, the list that another way is the 740MHz of 740MHz amplification modules output and power is+7dBm Frequency signal, the 3rd tunnel are the lists that the swept frequency range that the first local oscillator generation module produces is 2170 ~ 2370MHz and power is+7dBm Frequency signal, after the radio frequency generation module secondary mixing, amplification, filtering, output swept frequency range is（2750~2950）± 15MHz, the linear frequency modulation that power is 0dBm interrupt continuous wave signal RF to be launched to the transmitter of S-band wave observation radar.
Compared with prior art, the present invention has the following advantages and beneficial effect：
1st, the present invention is combined by carrying out appropriate mixing to input signal, and it is 2170-2370MHz's to produce a frequency First local oscillation signals of the sine wave signal LO1 as AFE(analog front end), it is continuous to produce the linear frequency modulation that a frequency is 538.5MHz Second local oscillation signals of the ripple signal LO2 as AFE(analog front end), produces the linear frequency modulation that a frequency is 2750-2950MHz and interrupts Continuous wave signal RF launches signal as transmitter.The present invention does not have to require the simple signal F1 and F3 of input to be concerned with, system letter It is single and easy to implement.
2nd, the present invention in the first local oscillator generation module, only to incoming frequency be 2170-2370MHz simple signal F1 into Row amplification filtering, exports the first local oscillation signal of the AFE(analog front end) as S-band wave observation radar, will not produce new spuious point Amount, ensure that the purity of frequency spectrum of the first local oscillation signal.
3rd, the present invention is only amplified filter in 740MHz amplification modules to the simple signal F3 that incoming frequency is 740MHz Ripple, its output will not produce new spurious components, ensure that its purity of frequency spectrum, be conducive to improve radio frequency generation module, second Shake the quality of output signals of generation module.
4th, the present invention, using high intermediate frequency, single-conversion mode, reduces what is subsequently filtered in the second local oscillator generation module Realize difficulty, improve image frequency rejection ability.
5th, for the present invention in radio frequency generation module, the 1st frequency conversion uses high intermediate frequency conversion system, reduces what is subsequently filtered Image frequency rejection ability is improved while difficulty, the 2nd frequency conversion uses Low Medium Frequency conversion system, reduces wanting for input signal Ask.
Brief description of the drawings
Fig. 1 is a kind of structure composition schematic diagram of S-band wave observation radar frequency synthesizer provided in an embodiment of the present invention.
Fig. 2 is 740MHz amplification modules structure composition block diagram provided in an embodiment of the present invention.
Fig. 3 is the first local oscillator generation module structure composition block diagram provided in an embodiment of the present invention.
Fig. 4 is the second local oscillator generation module structure composition block diagram provided in an embodiment of the present invention.
Fig. 5 is radio frequency generation module structure composition block diagram provided in an embodiment of the present invention.
Embodiment
The invention will be further described for shown embodiment below in conjunction with the accompanying drawings.
Fig. 1 is a kind of structure composition schematic diagram of S-band wave observation radar frequency synthesizer provided in an embodiment of the present invention.Such as Shown in attached drawing 1, a kind of S-band wave observation radar frequency synthesizer of the present invention, including the production of the first local oscillator generation module, radio frequency Raw module, 740MHz amplification modules and the second local oscillator generation module.
The input terminal of the first local oscillator generation module is used to input simple signal F1, the first local oscillator generation module Output terminal is divided into two-way, wherein export sine wave signal LO1 all the way, to the AFE(analog front end) of S-band wave observation radar, as its first Local oscillation signal, another way connect the first input end of radio frequency generation module；The input terminal of the 740MHz amplification modules is used to input Simple signal F3, the output terminal of the 740MHz amplification modules is divided into two-way, wherein connect radio frequency generation module all the way second is defeated Enter end, another way connects the first input end of the second local oscillator generation module；3rd input terminal of the radio frequency generation module is used for defeated Enter linear frequency modulation and interrupt continuous wave signal F2, the output terminal of the radio frequency generation module is used to export linear FM interrupt continuous wave Signal RF launches to the transmitter of S-band wave observation radar；Second input terminal of the second local oscillator generation module is used for input line Property CW with frequency modulation signal F4, the second local oscillator generation module output terminal output linear frequency modulation continuous wave signal LO2, to S The AFE(analog front end) of wave band wave observation radar, as its second local oscillation signal.
Fig. 2 is 740MHz amplification modules structure composition block diagram provided in an embodiment of the present invention.As shown in Figure 2, this example In 740MHz amplification modules, from input terminal to output terminal include a sequentially connected amplifier, SAW filter, one A Π types resistors match network and a power splitter, wherein, the input terminal input of the amplifier is simple signal F3, described Two output terminals of power splitter be respectively connected to radio frequency generation module the second input terminal and the second local oscillator generation module it is first defeated Enter end.In the 740MHz amplification modules, the amplifier uses GALI-74+, its gain >=24dB, noise coefficient≤3, Export 3 rank sections >=35dB；The SAW filter uses CF740, its centre frequency 740MHz, three dB bandwidth >=7MHz, Insertion Loss ≤ 4dB, passband fluctuation≤1dB, stopband suppression >=40dB；The power splitter uses JPS-2-900, frequency range 400- 900MHz, Insertion Loss≤2dB, isolation >=18dB, unbalance in phase≤1o, amplitude imbalance≤0.5dB；The 740MHz amplifications The power of the simple signal F3 of module input is -4dBm, adjusts the Π type resistors match networks in the 740MHz amplification modules The two paths of signals power for making the 740MHz amplification modules output is 7 ± 1dBm.
Fig. 3 is the first local oscillator generation module structure composition block diagram provided in an embodiment of the present invention.As shown in Figure 3, this reality The first local oscillator generation module in example, includes a sequentially connected amplifier, a bandpass filtering from input terminal to output terminal Device, a Π type resistors match network and a power splitter, wherein, the input terminal input of the amplifier is simple signal F1, one of output terminal output of the power splitter is sine wave signal LO1, to the AFE(analog front end) of S-band wave observation radar, As its first local oscillation signal, another exports the first input end for connecing radio frequency generation module.The amplifier uses GALI-84+, its gain >=18dB, noise coefficient≤4.5, export 3 rank sections >=34dB；The bandpass filter uses Mini- The BFCN-2275+ of Circuits companies, free transmission range 2170-2380MHz, loss≤3dB, stopband attenuation >=30dB；The work( Device is divided to use SP-2U2+, frequency range 1720-2850MHz, Insertion Loss≤4dB, isolation >=20dB, unbalance in phase≤1o, width Spend imbalance≤0.2dB；The power of the simple signal F1 of first local oscillator generation module input be -6dBm, adjusts described the Π type resistors match networks in one local oscillator generation module make the two paths of signals power of the first local oscillator generation module output equal For 7 ± 1dBm.
Fig. 4 is the second local oscillator generation module structure composition block diagram provided in an embodiment of the present invention.As shown in Figure 4, this reality The second local oscillator generation module in example, includes sequentially connected first amplifier, first band logical from input terminal to output terminal Wave filter, frequency mixer, Π type resistors match network, second bandpass filter, second amplifier and the 3rd bandpass filtering Device, wherein, the second input terminal of the input terminal of first amplifier as the second local oscillator generation module, for inputting Linear frequency modulation continuous wave signal F4, another input terminal of the frequency mixer are inputted as the first of the second local oscillator generation module End, for accessing 740MHz amplification modules, the output terminal of the 3rd bandpass filter produces mould as second local oscillator The output terminal of block, for exporting linear frequency modulation continuous wave signal LO2, to the AFE(analog front end) of S-band wave observation radar, as its second Local oscillation signal.First amplifier uses GALI-74+, its gain >=24dB, noise coefficient≤3, and 3 rank sections of output >= 35dB；First bandpass filter uses RBP-204+, free transmission range 175-237MHz, loss≤3dB, and stopband attenuation >= 35dB；The frequency mixer uses ADE-4, radio-frequency head frequency range 200-1000MHz, local oscillator end frequency range 200-1000MHz, Medium frequency output end frequency range DC-800MHz, conversion loss≤8dB, isolation >=40dB；Second amplifier uses GALI-84+, its gain >=18dB, noise coefficient≤4.5, export 3 rank sections >=34dB；Second bandpass filter and 3rd bandpass filter uses SXBP-507+, free transmission range 460-560MHz, loss≤2dB, stopband attenuation >=20dB； The power of the linear frequency modulation continuous wave signal F4 of the second local oscillator generation module input is -24dBm, adjusts second local oscillator Π type resistors match networks in generation module make the linear frequency modulation continuous wave of the second local oscillator generation module output terminal output The power of signal LO2 is 7 ± 1dBm.
Fig. 5 is radio frequency generation module structure composition block diagram provided in an embodiment of the present invention.As shown in Figure 5, in this example Radio frequency generation module, from input terminal to output terminal include sequentially connected first frequency mixer, first bandpass filter, Π Type resistors match network, first amplifier, second frequency mixer, second bandpass filter, second amplifier and the 3rd A bandpass filter, wherein, two input terminals of first frequency mixer are respectively as the 3rd of the radio frequency generation module Input terminal and the second input terminal, the output for input linear FM interrupt continuous wave signal F2 and 740MHz amplification module are believed Number, the first input end of the wherein input terminal of second frequency mixer as the radio frequency generation module, for accessing the One local oscillator generation module, the output terminal of the output terminal of the 3rd bandpass filter as the radio frequency generation module, is used for The transmitter that linear FM interrupt continuous wave signal RF is exported to S-band wave observation radar is launched.First frequency mixer uses ADE-4, radio-frequency head frequency range 200-1000MHz, local oscillator end frequency range 200-1000MHz, medium frequency output end frequency range DC-800MHz, conversion loss≤8dB, isolation >=40dB；First bandpass filter uses BPF-A580+, passband model Enclose 520-640MHz, loss≤4dB, stopband attenuation >=40dB；First amplifier uses GALI-74+, and gain >= 24dB, noise coefficient≤3, export 3 rank sections >=35dB；Second frequency mixer uses ADE-18W, radio-frequency head frequency range 1750-3500MHz, local oscillator end frequency range 1750-3500MHz, medium frequency output end frequency range DC-700MHz, conversion loss ≤ 7dB, isolation >=20dB of local oscillator radio-frequency head；Second amplifier uses GALI-24+, its gain >=18dB, noise Coefficient≤4.5, export 3 rank sections >=34dB；Second bandpass filter and the 3rd bandpass filter use Mini- The BFCN-2850+ of Circuits companies, free transmission range 2750-2950MHz, loss≤4dB, stopband attenuation >=20dB；Adjustment institute Stating the Π type resistors match networks in radio frequency generation module interrupts the linear frequency modulation of the radio frequency generation module output terminal output The power of continuous wave signal RF is 0 ± 1dBm.
In this example, the signal one of the input terminal of the frequency synthesizer shares four kinds of signals, four input signal difference Continuous wave letter is interrupted for 1 linear frequency modulation continuous wave signal F4,1 linear frequency modulation caused by S-band wave observation radar signal source Number F2 and 2 simple signal, is respectively simple signal F1 and simple signal F3；
The simple signal F1 is sine wave signal, and frequency 2170-2370MHz, power is -6dBm；
The simple signal F3 is sine wave signal, and frequency 740MHz, power is -4dBm；
The centre frequency of the linear frequency modulation continuous wave signal F4 is 201.5MHz, bandwidth 30MHz, power for- 24dBm；
The centre frequency that the linear frequency modulation interrupts continuous wave signal F2 be 160MHz, bandwidth 30MHz, power is- 13dBm；
Wherein, the simple signal F1 and simple signal F3 of input can be irrelevant.
Pass through the frequency synthesizer using four input signals of frequency synthesizer described above, one frequency of output is （2750-2950）The linear frequency modulation of ± 15MHz interrupts continuous wave signal RF to be launched to the transmitter of S-band wave observation radar, described The bandwidth that linear frequency modulation interrupts continuous wave signal RF is 30MHz, power 0dBm；One frequency of output is 2170-2370MHz's Sine wave signal LO1, to the AFE(analog front end) of S-band wave observation radar, as its first local oscillation signal, its power is+7dBm；Output One frequency is the linear frequency modulation continuous wave signal LO2 of 538.5MHz, to the AFE(analog front end) of S-band wave observation radar, as its Two local oscillation signals, its bandwidth are 30MHz, power 7dBm.
In conclusion the present invention is combined by carrying out appropriate mixing to input signal, it is 2170- to produce a frequency First local oscillation signals of the sine wave signal LO1 of 2370MHz as AFE(analog front end), it is the linear of 538.5MHz to produce a frequency Second local oscillation signals of the CW with frequency modulation signal LO2 as AFE(analog front end), it is the linear of 2750-2950MHz to produce a frequency FM interrupt continuous wave signal RF launches signal as transmitter.The present invention does not have to simple signal F1 and the F3 phase for requiring input It is dry, simple system, and it is easy to implement.The present invention is 2170-2370MHz only to incoming frequency in the first local oscillator generation module Simple signal F1 be amplified filtering, export the first local oscillation signal of the AFE(analog front end) as S-band S-band wave observation radar, New spurious components will not be produced, ensure that the purity of frequency spectrum of the first local oscillation signal.
The present invention is only amplified filter in 740MHz amplification modules to the simple signal F3 that incoming frequency is 740MHz Ripple, its output will not produce new spurious components, ensure that its purity of frequency spectrum, be conducive to improve radio frequency generation module, second Shake the quality of output signals of generation module.
The present invention, using high intermediate frequency, single-conversion mode, reduces the reality subsequently filtered in the second local oscillator generation module Existing difficulty, improves image frequency rejection ability.
For the present invention in radio frequency generation module, the 1st frequency conversion uses high intermediate frequency conversion system, reduces the difficulty subsequently filtered Image frequency rejection ability is improved while spending, the 2nd frequency conversion uses Low Medium Frequency conversion system, reduce the requirement of input signal.
As shown in Fig. 2, in this example, the simple signal F3 that frequency is 740MHz and power is -4dBm is first passed around 740MHz amplification modules, the simple signal that output two-way frequency is 740MHz and power is+7dBm, is sent to radio frequency and produces mould respectively Block and the second local oscillator generation module.
As shown in figure 3, the simple signal F1 that frequency range is 2170 ~ 2370MHz and power is -6dBm passes through the first local oscillator Generation module, the simple signal that output two-way frequency range is 2170 ~ 2370MHz and power is+7dBm, is penetrated wherein being sent to all the way Frequency generation module, another way export first local oscillation signals of the sine wave signal LO1 as S-band wave observation radar AFE(analog front end).Such as Shown in Fig. 4, the second local oscillator generation module has two-way input signal, be the exterior swept frequency range sent all the way for 201.5 ± The linear frequency modulation continuous wave signal F4 of 15MHz, another way be 740MHz amplification modules output 740MHz and power be+7dBm Simple signal, after the second local oscillator generation module mixing, amplification, filtering, output swept frequency range is 538.5 ± 15MHz, work( Rate is the linear frequency modulation continuous wave signal LO2 of+7dBm, to the AFE(analog front end) of S-band wave observation radar, is believed as its second local oscillator Number.
As shown in figure 5, the radio frequency generation module in this example has three tunnel input signals, be all the way it is exterior send sweep The linear frequency modulation that frequency scope is 160 ± 15MHz interrupts continuous wave signal F2, and another way is the output of 740MHz amplification modules 740MHz and power are the simple signal of+7dBm, the 3rd tunnel is the swept frequency range that produces of the first local oscillator generation module for 2170 ~ 2370MHz and the simple signal that power is+7dBm, after the radio frequency generation module secondary mixing, amplification, filtering, output is swept Frequency scope is（2750~2950）± 15MHz, the linear frequency modulation that power is 0dBm interrupt continuous wave signal RF, which will be sent to S Wave band wave observation radar transmitter is for transmitting.
Specific embodiment described herein is only to present invention explanation for example.The skill of the technical field of the invention Art personnel can do various modifications or additions to described specific embodiment or substitute in a similar way, but simultaneously The spirit or beyond the scope of the appended claims of the present invention is not deviated by.

Claims (8)

  1. A kind of 1. S-band wave observation radar frequency synthesizer, it is characterised in that：Mould is produced including the first local oscillator generation module, radio frequency Block, 740MHz amplification modules and the second local oscillator generation module；
    The input terminal of the first local oscillator generation module is used to input simple signal F1, the output of the first local oscillator generation module End is divided into two-way, wherein sine wave signal LO1 is exported all the way, to the AFE(analog front end) of S-band wave observation radar, as its first local oscillator Signal, another way connect the first input end of radio frequency generation module；The input terminal of the 740MHz amplification modules is used to input single-frequency Signal F3, the output terminal of the 740MHz amplification modules are divided into two-way, wherein the second input terminal of radio frequency generation module is connect all the way, Another way connects the first input end of the second local oscillator generation module；3rd input terminal of the radio frequency generation module is used for input linear FM interrupt continuous wave signal F2, the output terminal of the radio frequency generation module are used to export linear FM interrupt continuous wave signal RF Transmitter to S-band wave observation radar is launched；Second input terminal of the second local oscillator generation module is used for input linear frequency modulation Continuous wave signal F4, the output terminal output linear frequency modulation continuous wave signal LO2 of the second local oscillator generation module, is surveyed to S-band The AFE(analog front end) of ripple radar, as its second local oscillation signal；
    The first local oscillator generation module, includes a sequentially connected amplifier, a band logical filter from input terminal to output terminal Ripple device, a Π type resistors match network and a power splitter, wherein, the input terminal input of the amplifier is simple signal F1, one of output terminal output of the power splitter is sine wave signal LO1, to the AFE(analog front end) of S-band wave observation radar, As its first local oscillation signal, another exports the first input end for connecing radio frequency generation module；
    The radio frequency generation module, includes sequentially connected first frequency mixer, first band logical filter from input terminal to output terminal Ripple device, Π type resistors match network, first amplifier, second frequency mixer, second bandpass filter, second amplifier And the 3rd bandpass filter, wherein, two input terminals of first frequency mixer are respectively as the radio frequency generation module The 3rd input terminal and the second input terminal, for the defeated of input linear FM interrupt continuous wave signal F2 and 740MHz amplification module Go out signal, the first input end of the wherein input terminal of second frequency mixer as the radio frequency generation module, for connecing Enter the first local oscillator generation module, the output terminal of the output terminal of the 3rd bandpass filter as the radio frequency generation module, Launch for exporting linear FM interrupt continuous wave signal RF to the transmitter of S-band wave observation radar；
    The 740MHz amplification modules, include a sequentially connected amplifier, a sound table filtering from input terminal to output terminal Device, a Π type resistors match network and a power splitter, wherein, the input terminal input of the amplifier is simple signal F3, two output terminals of the power splitter are respectively connected to the second input terminal and the second local oscillator generation module of radio frequency generation module First input end；
    The second local oscillator generation module, includes sequentially connected first amplifier, first band from input terminal to output terminal Bandpass filter, frequency mixer, Π type resistors match network, second bandpass filter, second amplifier and the 3rd band logical filter Ripple device, wherein, the second input terminal of the input terminal of first amplifier as the second local oscillator generation module, for defeated Enter linear frequency modulation continuous wave signal F4, another input terminal of the frequency mixer is first defeated as the second local oscillator generation module Enter end, for accessing 740MHz amplification modules, the output terminal of the 3rd bandpass filter is produced as second local oscillator The output terminal of module, for exporting linear frequency modulation continuous wave signal LO2, to the AFE(analog front end) of S-band wave observation radar, as its Two local oscillation signals.
  2. A kind of 2. S-band wave observation radar frequency synthesizer according to claim 1, it is characterised in that：The frequency synthesis Four input signals of device be respectively 1 linear frequency modulation continuous wave signal F4 caused by S-band wave observation radar signal source, 1 Linear frequency modulation interrupts continuous wave signal F2 and 2 simple signals, is respectively simple signal F1 and simple signal F3；
    The simple signal F1 is sine wave signal, and frequency 2170-2370MHz, power is -6dBm；
    The simple signal F3 is sine wave signal, and frequency 740MHz, power is -4dBm；
    The centre frequency of the linear frequency modulation continuous wave signal F4 is 201.5MHz, and bandwidth 30MHz, power is -24dBm；
    The centre frequency that the linear frequency modulation interrupts continuous wave signal F2 is 160MHz, and bandwidth 30MHz, power is -13dBm；
    Wherein, the simple signal F1 and simple signal F3 of input are irrelevant.
  3. A kind of 3. S-band wave observation radar frequency synthesizer according to claim 2, it is characterised in that：The frequency synthesis Four input signals of device pass through the frequency synthesizer, export the linear frequency modulation that a frequency is (2750-2950) ± 15MHz The transmitter that continuous wave signal RF is interrupted to S-band wave observation radar is launched, and the linear frequency modulation interrupts the band of continuous wave signal RF Width is 30MHz, power 0dBm；The sine wave signal LO1 that one frequency of output is 2170-2370MHz, ripple thunder is surveyed to S-band The AFE(analog front end) reached, as its first local oscillation signal, its power is+7dBm；The linear tune that one frequency of output is 538.5MHz Frequency continuous wave signal LO2, to the AFE(analog front end) of S-band wave observation radar, as its second local oscillation signal, its bandwidth is 30MHz, work( Rate is 7dBm.
  4. A kind of 4. S-band wave observation radar frequency synthesizer according to claim 1, it is characterised in that：In the first Shaking in generation module, the amplifier uses GALI-84+, its gain >=18dB, noise coefficient≤4.5,3 rank sections of output >= 34dB；
    The bandpass filter uses BFCN-2275+, the free transmission range 2170-2380MHz of Mini-Circuits companies, loss ≤ 3dB, stopband attenuation >=30dB；
    The power splitter uses SP-2U2+, and frequency range 1720-2850MHz, Insertion Loss≤4dB, isolation >=20dB, phase is not ≤ 1 ° of balance, amplitude imbalance≤0.2dB；
    The power of the simple signal F1 of the first local oscillator generation module input is -6dBm, adjusts first local oscillator and produces mould Π types resistors match network in the block makes the two paths of signals power of the first local oscillator generation module output be 7 ± 1dBm.
  5. A kind of 5. S-band wave observation radar frequency synthesizer according to claim 1, it is characterised in that：In the 740MHz In amplification module, the amplifier uses GALI-74+, its gain >=24dB, noise coefficient≤3, exports 3 rank sections >=35dB；
    The SAW filter uses CF740, its centre frequency 740MHz, three dB bandwidth >=7MHz, Insertion Loss≤4dB, passband fluctuation ≤ 1dB, stopband suppression >=40dB；
    The power splitter uses JPS-2-900, and frequency range 400-900MHz, Insertion Loss≤2dB, isolation >=18dB, phase is not ≤ 1 ° of balance, amplitude imbalance≤0.5dB；
    The power of the simple signal F3 of the 740MHz amplification modules input is -4dBm, is adjusted in the 740MHz amplification modules Π type resistors match networks make the two paths of signals power of 740MHz amplification modules output be 7 ± 1dBm.
  6. A kind of 6. S-band wave observation radar frequency synthesizer according to claim 1, it is characterised in that：At described second Shake in generation module, first amplifier uses GALI-74+, its gain >=24dB, noise coefficient≤3, and 3 ranks of output are cut Point >=35dB；
    First bandpass filter uses RBP-204+, free transmission range 175-237MHz, loss≤3dB, and stopband attenuation >= 35dB；
    The frequency mixer uses ADE-4, radio-frequency head frequency range 200-1000MHz, local oscillator end frequency range 200-1000MHz, Medium frequency output end frequency range DC-800MHz, conversion loss≤8dB, isolation >=40dB；
    Second amplifier uses GALI-84+, its gain >=18dB, noise coefficient≤4.5, and 3 rank sections of output >= 34dB；
    Second bandpass filter and the 3rd bandpass filter use SXBP-507+, free transmission range 460-560MHz, loss ≤ 2dB, stopband attenuation >=20dB；
    The power of the linear frequency modulation continuous wave signal F4 of the second local oscillator generation module input is -24dBm, adjustment described second Π type resistors match networks in local oscillator generation module connect the linear frequency modulation of the second local oscillator generation module output terminal output The power of continuous ripple signal LO2 is 7 ± 1dBm.
  7. A kind of 7. S-band wave observation radar frequency synthesizer according to claim 1, it is characterised in that：Produced in the radio frequency In raw module, first frequency mixer uses ADE-4, radio-frequency head frequency range 200-1000MHz, local oscillator end frequency range 200-1000MHz, medium frequency output end frequency range DC-800MHz, conversion loss≤8dB, isolation >=40dB；
    First bandpass filter uses BPF-A580+, free transmission range 520-640MHz, loss≤4dB, and stopband attenuation >= 40dB；
    First amplifier uses GALI-74+, and gain >=24dB, noise coefficient≤3, export 3 rank sections >=35dB；
    Second frequency mixer uses ADE-18W, radio-frequency head frequency range 1750-3500MHz, local oscillator end frequency range 1750-3500MHz, medium frequency output end frequency range DC-700MHz, conversion loss≤7dB, the isolation of local oscillator radio-frequency head >= 20dB；
    Second amplifier uses GALI-24+, its gain >=18dB, noise coefficient≤4.5, and 3 rank sections of output >= 34dB；
    Second bandpass filter and the 3rd bandpass filter use the BFCN-2850 of Mini-Circuits companies +, free transmission range 2750-2950MHz, loss≤4dB, stopband attenuation >=20dB；
    Adjusting the Π type resistors match networks in the radio frequency generation module makes the line of the radio frequency generation module output terminal output The power of property FM interrupt continuous wave signal RF is 0 ± 1dBm.
  8. A kind of 8. S-band wave observation radar frequency synthesizer according to claim 1, it is characterised in that：Frequency is 740MHz And the simple signal F3 that power is -4dBm first passes around 740MHz amplification modules, output two-way frequency be 740MHz and power for+ The simple signal of 7dBm, is sent to radio frequency generation module and the second local oscillator generation module respectively；
    The simple signal F1 that frequency range is 2170~2370MHz and power is -6dBm passes through the first local oscillator generation module, exports Two-way frequency range is 2170~2370MHz and power is the simple signal of+7dBm, wherein radio frequency generation module is sent to all the way, Another way exports first local oscillation signals of the sine wave signal LO1 as S-band wave observation radar AFE(analog front end)；
    The second local oscillator generation module has two-way input signal, is that the exterior swept frequency range sent is 201.5 ± 15MHz all the way Linear frequency modulation continuous wave signal F4, another way be 740MHz amplification modules output 740MHz and power be+7dBm single-frequency Signal, after the second local oscillator generation module mixing, amplification, filtering, output swept frequency range is 538.5 ± 15MHz, power is The linear frequency modulation continuous wave signal LO2 of+7dBm, to the AFE(analog front end) of S-band wave observation radar, as its second local oscillation signal；
    The radio frequency generation module has three tunnel input signals, is that the exterior swept frequency range sent is the linear of 160 ± 15MHz all the way FM interrupt continuous wave signal F2, the single-frequency that another way is the 740MHz of 740MHz amplification modules output and power is+7dBm are believed Number, the 3rd tunnel is that the single-frequency that the swept frequency range that the first local oscillator generation module produces is 2170~2370MHz and power is+7dBm is believed Number, after the radio frequency generation module secondary mixing, amplification, filtering, output swept frequency range for (2750~2950) ± 15MHz, The linear frequency modulation that power is 0dBm interrupts continuous wave signal RF to be launched to the transmitter of S-band wave observation radar.
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