CN106017669A - Multifunctional reading circuit system for KID detector array - Google Patents
Multifunctional reading circuit system for KID detector array Download PDFInfo
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- CN106017669A CN106017669A CN201610319948.2A CN201610319948A CN106017669A CN 106017669 A CN106017669 A CN 106017669A CN 201610319948 A CN201610319948 A CN 201610319948A CN 106017669 A CN106017669 A CN 106017669A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
- G01J2001/4406—Plural ranges in circuit, e.g. switchable ranges; Adjusting sensitivity selecting gain values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
- G01J2001/4446—Type of detector
Abstract
The invention provides a multifunctional reading circuit system for a KID detector array. The multifunctional reading circuit system for the KID detector array comprises a control computer, a waveform generator for generating an excitation signal of the KID detector array, a synchronous clock circuit for providing clock circuit synchronizing signals for each circuit, a digital signal processing circuit for reading detection signals of the KID detector array in an amplitude detection mode, and an intermediate-frequency signal processing circuit directly connected with the KID detector array. The waveform generator, the synchronous clock circuit, and the digital signal processing circuit are connected with the control computer. The intermediate-frequency signal processing circuit is connected with the waveform generator, the synchronous clock circuit, and the digital signal processing circuit. The multifunctional reading circuit system for the KID detector array has a function of resonant frequency calibration and performance representation of resonators in the KID detector array and a function of detection signal reading.
Description
[technical field]
The present invention relates to the multi-functional reading circuit system of a kind of KID detector array.
[background technology]
Terahertz superconduction KID (Kinetic Inductance Detector) detector array is a kind of novel
Terahertz highly-sensitive detector, can be used for Terahertz frequency range astronomy target imaging observation.KID visits
Survey device to be mainly made up of terahertz signal receptor and two parts of microwave resonator, detect according to KID
Device operation principle, when outside terahertz signal irradiation KID detector, receptor accepts Terahertz energy
After, the dynamic electric resistor of microwave resonator and the change of dynamic inductance will be caused, thus it is humorous to cause microwave
Device characteristic of shaking (Q factor parameter, amplitude-frequency characteristic and phase place etc.) changes.By obtaining microwave resonator
Characteristic (amplitude or phase place) change information, can obtain detectable signal information indirectly.
Currently, the excitation signal generator in KID detector array row reading circuit system have employed FPGA
With the scheme of DAC digital-to-analog circuit, produce comb signal (multi-tone signal), using as KID detector
The exciting signal source of array.The program only produces multi-tone signal, function singleness, and is limited to use DAC
The bandwidth of circuit and interference signal rejection so that bandwidth and the dynamic range of output drive signal have
Effect (bandwidth is less than 1GHz), this directly limit the KID detector array scale of excitation.
And, intermediate-freuqncy signal modulate circuit uses up-conversion and low-converter majority to be IQ frequency mixers pair,
Or general double sideband mixer, and combine the schemes such as some amplifiers, attenuator, wave filter, come
Realize frequency transformation and the power adjustments of base band pumping signal, to mate the work of KID detector array
Frequency and the requirement of input power levels.The function of intermediate-freuqncy signal modulate circuit only realizes terahertz at present
Hereby acquisition of signal use, or realize KID detector array characteristic present (resonant frequency, Q factor,
Sensitivity etc. are measured), function is the most single, and this will answer to KID detector array acquisition of signal is actual
With making troubles.
Similarly, at digital signal processing circuit, the main number using ADC and FPGA to combine
Word signal processing technology scheme, or realize frequency spectrum processing, or obtain KID width for homodyne mixing
Frequency or the direct current I of phase frequency information, Q signal collection.Particularly in terms of frequency spectrum processing, at present owing to being subject to
ADC processes bandwidth and FPGA digital signal processing capability limits, and does not reach ultra wide bandwidth and processes,
Which also limits digital signal processing circuit at extensive (1000 pixel magnitude) KID detector array
Signal reading in terms of application (similarly, digital signal processing circuit bandwidth of operation is the widest, can connect
The biggest by KID detector array scale).
Additionally, due to the resonant frequency of the microwave resonator of each pixel of KID detector array is not
With under operating temperature or under the situation of change of other conditions, it is susceptible to small change.In order to realize
The dynamic terahertz signal of highly sensitive width detects, and needs accurately to set the multi-tone signal frequency of all excitations
Put on the resonant frequency point of corresponding KID detector array.Read due to KID detector array at present
Go out circuit function the most single, obtain the resonance frequency of KID detector array each pixel microwave resonator
Rate needs by extra auxiliary equipment, such as Network Analyzer.Additional aids is used to increase unavoidably
Extra hardware expense, measurement system error the most that may be present will affect reading circuit performance, thus
KID detector array detection performance may be reduced.Additional aids is used also practical operation to be brought
Inconvenience.
For the problems referred to above, this patent proposes the multi-functional reading circuit system of KID detector array,
I.e. in same system, it is achieved the microwave resonator resonant frequency of KID detector array is demarcated, KID
The reading of the Terahertz detection signal of detector array characteristics sign and KID detector array, should
Reading circuit system possesses multiple performance, it is to avoid the incision of peripheral supplementary means, improves reading circuit system
While system performance, also simplify overall reading circuit.
[summary of the invention]
It is an object of the invention to provide the multi-functional reading circuit system of a kind of KID detector array.
Technical scheme is as follows: the multi-functional reading circuit system of a kind of KID detector array
Including: control the waveform generator of the pumping signal of computer, generation KID detector array, be each
Circuit provides the synchronous clock circuit of clock circuit synchronizing signal, realizes described KID spy in amplitude detection mode
The digital signal processing circuit that survey device array detection signal reads connects with described KID detector array with direct
The signal processing circuit of intermediate frequency connect, described waveform generator, described synchronous clock circuit and described numeral
Signal processing circuit is connected with described control computer respectively, and described signal processing circuit of intermediate frequency is also distinguished
It is connected with described waveform generator, described synchronous clock circuit and described digital signal processing circuit.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
Stating waveform generator is AWG (Arbitrary Waveform Generator).
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State digital signal processing circuit include baseband signal is carried out real time spectrum process FFT spectrum instrument and with institute
State the data collecting card that FFT spectrum instrument connects, described FFT spectrum instrument and described data collecting card respectively
It is connected with described control computer.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State signal processing circuit of intermediate frequency and include realizing the up-converter circuit of single sideband singal, upper and lower for pumping signal
Frequency conversion provide the local oscillation signal in local oscillation signal source produce circuit, complete baseband signal and direct current signal point
The baseband signal that the lower frequency changer circuit of stream, the power level adjustment completing baseband signal and bandwidth limit is adjusted
Reason circuit and complete homodyne and be mixed and ensure the direct current signal modulate circuit that direct current signal level adjusts,
Described up-converter circuit, described local oscillation signal produce circuit and described lower frequency changer circuit is sequentially connected with, and
Described lower frequency changer circuit the most respectively with described baseband signal modulate circuit and described direct current signal modulate circuit
Connect.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State up-converter circuit and include upconverter and the first low-pass filtering being connected with described upconverter respectively
Device, the second low pass filter and the first adjustable attenuator, described first low pass filter and the second low pass
Wave filter is connected with described waveform generator the most respectively, and described first adjustable attenuator is directly with described
KID detector array connects.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State local oscillation signal and produce frequency synthesizer that circuit includes being sequentially connected with, power divider, microwave switch
With the second adjustable attenuator, described frequency synthesizer is connected with described synchronous clock circuit, and described second
Adjustable attenuator is directly connected with described KID detector array.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State low-converter, the 3rd adjustable attenuator and the first low noise that lower frequency changer circuit includes being sequentially connected with to put
Big device and the first T-shaped bias device being connected with described low-converter respectively and the second T-shaped bias device,
Described first low-noise amplifier is directly connected with described KID detector array, described first T-shaped partially
Put device and described second T-shaped bias device is all adjusted with described baseband signal modulate circuit and described direct current signal
Reason circuit connects.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State the 3rd low pass filter and the second low noise amplification that baseband signal modulate circuit includes being sequentially connected with
Device and the 4th low pass filter being sequentially connected with and the 3rd low-noise amplifier, described 3rd low pass
Wave filter and described 4th low pass filter are all connected with described digital signal processing circuit, and described second
Low-noise amplifier and described 3rd low-noise amplifier are all connected with described lower frequency changer circuit.
In the multi-functional reading circuit system of the KID detector array of embodiment of the present invention offer, institute
State the first direct current amplifier that direct current signal modulate circuit includes being sequentially connected with and the 5th low pass filter,
And the second direct current amplifier of being sequentially connected with and the 6th low pass filter, described first direct current amplifier
All it is connected with described digital signal processing circuit with described second direct current amplifier, described 5th low pass filtered
Ripple device and described 6th low pass filter are all connected with described lower frequency changer circuit.
The beneficial effects of the present invention is: the multi-functional reading of the KID detector array that the present invention provides
Circuits System can complete the microwave resonance of KID detector array in same reading circuit system
Device resonant frequency is demarcated, and arranges AWG (Arbitrary Waveform Generator) generation excitation multi-tone signal according to spot frequency,
To realize the Terahertz detection signal of KID detector array.Therefore, described multi-functional reading circuit system
System possess the demarcation of KID detector array resonator resonant frequency, KID detector array performance characterization,
And the function such as KID detector array detectable signal reading.
[accompanying drawing explanation]
Fig. 1 is the multi-functional reading circuit system of the KID detector array that the embodiment of the present invention provides
Structured flowchart.
[detailed description of the invention]
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, the present invention is further elaborated.Should be appreciated that described herein specifically
Embodiment only in order to explain the present invention, is not intended to limit the present invention.
The description of specific distinct unless the context otherwise, the element in the present invention and assembly, quantity both may be used
Presented in single, it is also possible to presented in multiple, this is not defined by the present invention.
Although the step in the present invention is arranged with label, but it is not used to limit the precedence of step,
Based on the order of step or the execution of certain step need other steps unless expressly stated, no
Then the relative rank of step is adjustable in.Be appreciated that term used herein " with/
Or " relate to and contain the one or more of any and institute in the Listed Items being associated likely
Combination.
Refer to Fig. 1, be the multi-functional reading electricity of the KID detector array that the embodiment of the present invention provides
The structured flowchart of road system.The multi-functional reading circuit system of the KID detector array that the present invention provides
100 include producing the waveform generator 1 of the pumping signal of KID detector array, direct and described KID
Detector array connect signal processing circuit of intermediate frequency 2, realize described KID detector in amplitude detection mode
Digital signal processing circuit 3 that array detection signal reads, provide clock circuit synchronizing signal for each circuit
Synchronous clock circuit 4 and respectively with described waveform generator 1, described digital signal processing circuit 3
The control computer 5 connected with described synchronous clock circuit 4.Wherein, described IF signal processing electricity
Road 2 the most respectively with described waveform generator 1, described digital signal processing circuit 3 and described Tong Bu time
Clock circuit 4 connects.
Described waveform generator 1 as the exciting signal source of described multi-functional reading circuit system 100,
It is to realize the described multi-functional polyfunctional basis of reading circuit system 100.Selectively, described ripple
Shape generator 1 can be that commercial integrated broadband (such as: 3.2GHz) is high dynamically (such as: more than 50dB)
Exciting signal source, conventional driver signal generating circuit function singleness, performance therefore can be overcome more weak
Shortcoming.Preferably, described waveform generator 1 is AWG (Arbitrary Waveform Generator), and such as model is M8190A
AWG (Arbitrary Waveform Generator).
Described signal processing circuit of intermediate frequency 2 includes realizing the up-converter circuit 21 of single sideband singal, completing
The lower frequency changer circuit 22 of the shunting of baseband signal and direct current signal, provide this for pumping signal Up/Down Conversion
The local oscillation signal of signal source of shaking produces circuit 23, the power level adjustment completing baseband signal and band tolerance
The baseband signal modulate circuit 24 of system and complete homodyne and be mixed and ensure what direct current signal level adjusted
Direct current signal modulate circuit 25.Wherein, described up-converter circuit 21, described local oscillation signal produce circuit
23 and described lower frequency changer circuit 22 be sequentially connected with, and described lower frequency changer circuit 22 the most respectively with described base
Band signal modulate circuit 24 and described direct current signal modulate circuit 25 connect.
Described up-converter circuit 21 includes upconverter 21C and connects with described upconverter 21C respectively
The first low pass filter 21A, the second low pass filter 21B and the first adjustable attenuator 21D connect,
Described first low pass filter 21A and the second low pass filter 21B the most respectively with described waveform generator
1 connects, and described first adjustable attenuator 21D is directly connected with described KID detector array.
Wherein, described first low pass filter 21A is used for turning on I road signal, described second low pass filtered
Ripple device 21B is used for turning on Q road signal, and described upconverter 21C is IQ converter.
Described local oscillation signal produces frequency synthesizer 23A, the power distribution that circuit 23 includes being sequentially connected with
Device 23B, microwave switch 23C and the second adjustable attenuator 23D, described frequency synthesizer 23A and institute
State synchronous clock circuit 4 to connect, described second adjustable attenuator 23D directly with described KID detector
Array connects.And, produce between circuit 23 and described up-converter circuit 21 at local oscillation signal, institute
State upconverter 21C to be directly connected with described microwave switch 23C.
In the present embodiment, described local oscillation signal generation circuit 23 is possible not only to become up and down for pumping signal
Frequency provides local oscillation signal source, it is also possible to provide swept signal source for homodyne when being mixed.And, described
The signal generating circuit 23 that shakes uses the height of changeable frequency (such as: operating frequency range is 3-8GHz)
Precision frequency signal as local oscillation signal source, acquisition of signal during in order to realize fixing frequency work and
The table of the KID detector array frequency when measurement of KID noise of detector performance and frequency sweep work
Levy.
Described lower frequency changer circuit 22 includes low-converter 22C, the 3rd adjustable attenuator being sequentially connected with
22B and the first low-noise amplifier 22A and be connected with described low-converter 22C respectively first
T-shaped bias device 22D and the second T-shaped bias device 22E, described first low-noise amplifier 22A is direct
It is connected with described KID detector array, described first T-shaped bias device 22D and described second T-shaped
Bias device 22E all connects with described baseband signal modulate circuit 24 and described direct current signal modulate circuit 25
Connect.And, produce between circuit 23 and described lower frequency changer circuit 22 at described local oscillation signal, described
Microwave switch 23C is directly connected with described low-converter 22C.
Wherein, described first T-shaped bias device 22D is used for turning on I road signal, described second T-shaped partially
Putting device 22E for turning on Q road signal, described low-converter 22C is IQ converter.
In the present embodiment, described lower frequency changer circuit 22 have employed IQ frequency mixer as described down coversion
Device 22C, not only achieves the up-conversion of single sideband singal, it is also possible to take a message with effectively suppression mirror image side
Number interference, thus improve dynamic range and the signal to noise ratio of pumping signal.And, use described IQ to mix
Frequently the mode that device combines with T-shaped bias device completes the shunting of baseband signal and direct current signal, thus real
Existing described KID detector array detectable signal reads and described KID detector array performance characterization, with
And the multifunctionality that the resonator resonant frequency of described KID detector array is demarcated.Preferably, described
IQ frequency mixer is the frequency mixer with broadband character, such as 3～the frequency mixer of 8GHz.
Described baseband signal modulate circuit 24 includes the 3rd low pass filter 24B and being sequentially connected with
Two low-noise amplifier 24A and the 4th low pass filter 24D being sequentially connected with and the 3rd low noise
Amplifier 24C, described 3rd low pass filter 24B and described 4th low pass filter 24D are all and institute
State digital signal processing circuit 3 to connect, described second low-noise amplifier 24A and described 3rd low noise
Acoustic amplifier 24C is all connected with described lower frequency changer circuit 22.Specifically, described second low noise is put
Big device 24A is connected with described first T-shaped bias device 22D, described 3rd low-noise amplifier 24C
It is connected with described second T-shaped bias device 22E.
In the present embodiment, described baseband signal modulate circuit 24 mainly completes the power electricity of baseband signal
Heibei provincial opera is whole and bandwidth limits, to prevent the aliasing effect of follow-up signal data acquisition.Specifically, institute
State baseband signal modulate circuit 24 and complete DC to 2GHz or the conditioning of 2.5GHz bandwidth baseband signal.
Described direct current signal modulate circuit 25 includes the first direct current amplifier 25B and being sequentially connected with
Five low pass filter 25A and the second direct current amplifier 25D being sequentially connected with and the 6th low-pass filtering
Device 25C, described first direct current amplifier 25B and described second direct current amplifier 25D all with described number
Word signal processing circuit 3 connects, described 5th low pass filter 25A and described 6th low pass filter
25C is all connected with described lower frequency changer circuit 22.Specifically, described 5th low pass filter 25A with
Described first T-shaped bias device 22D connects, described 6th low pass filter 25C and described 2nd T
Type bias device 22E connects.
In the present embodiment, when described direct current signal modulate circuit 25 mainly completes homodyne mixing, first
T-shaped bias device 22D and the low-pass filtering (example of described second T-shaped bias device 22E output direct current signal
As: interference signal more than 10kHz magnitude is suppressed) and the amplification of signal level, to ensure direct current
Signal level falls in the useful range of the ADC of follow-up high-accuracy data collection card.
The major function of described digital signal processing circuit 3 is that the wideband to baseband signal is real-time
Frequency spectrum processing, realize in amplitude detection mode KID detector array detectable signal read and to directly
Stream two-way I, Q signal carry out high-accuracy data acquisition, thus to realize KID detector array resonance
Device frequency demarcating and characteristic present.
Wherein, described digital signal processing circuit 3 includes baseband signal is carried out real time spectrum process
FFT spectrum instrument 31 and the data collecting card 32 being connected with described FFT spectrum instrument, described FFT spectrum
Instrument 31 and described data collecting card 32 are connected with described control computer 5 respectively.Wherein, described
Between digital signal processing circuit 3 and described signal processing circuit of intermediate frequency 2, described baseband signal is nursed one's health
Circuit 24 is connected with described FFT spectrum instrument 31, described direct current signal modulate circuit 25 and described number
Connect according to capture card 32.
And, the baseband signal of single channel can be entered by described FFT spectrum instrument 31 with full speed data collection
Row real time spectrum processes, or with two-way parallel mode, I, Q two-way baseband signal is carried out reduction of speed data acquisition
Collection and frequency spectrum processing.
In the present embodiment, in order to meet the extensive KID detector array letter of 1000 pixel magnitudes
Number detection read demand, the bandwidth of operation of described FFT spectrum instrument 31 is 2.0-2.5GHz, in real time
Spectral resolution is 76kHz；In order to realize the digital signal of high s/n ratio in data acquisition,
And improving KID detector array resonant frequency stated accuracy, described data collecting card 32 has
100kHz gathers data rate, in high precision (such as: more than 16bit) and the dynamic feature of height.
When each circuit of described synchronous clock circuit 4 predominantly described multi-functional reading circuit system provides
Clock circuit synchronousing signal.Preferably, described synchronous clock circuit 4 provides 10MHz or 100MHz
Synchronizing signal.Wherein, described digital signal processing circuit 3 and described synchronous clock circuit 4 it
Between, described synchronous clock circuit 4 directly with described FFT spectrum instrument 31.
Described control computer 5 can realize described waveform generator 1, described Digital Signal Processing
Circuit 3 and the control of described synchronous clock circuit 4, detectable signal to subsequent readout process, and
Data process etc. to described KID detector array performance characterization.
In the present embodiment, described control computer 5 completes KID detector resonance by embedded software
Device signal scaling, and the AWG (Arbitrary Waveform Generator) generation many messages of corresponding excitation are set according to spot frequency
Number, the output spectrum of described FFT spectrum instrument 31 is carried out pumping signal spectrum amplitude reading and process
To extract effective detectable signal information.
Additionally, described control computer 5 reads the IQ of described data collecting card 32 by embedded software
Data carry out amplitude-frequency characteristic and phase-frequency characteristic processes, and pixel resonance each to KID detector array
Frequency, Q factor, noiseproof feature parameter extraction.
And, when using described multi-functional reading circuit system 100, described KID detector array is entered
During row data read-out, it includes the following two kinds situation:
One, KID detector array resonator resonant frequency is demarcated and KID detector array performance
Characterize, and specifically include and implement step as follows:
Local oscillation signal in described signal processing circuit of intermediate frequency 2 is produced the microwave switch 23C of circuit 23
It is allocated to B port road, is connected with described KID detector array；
By described synchronous clock circuit 4 and described signal processing circuit of intermediate frequency 2, described digital processing electricity
Road 3 connects, and adjusts described signal processing circuit of intermediate frequency 2 all parts operating point；
Start described local oscillation signal by described control computer 5 and produce the frequency synthesizer in circuit 23
23A frequency sweep mode, described frequency synthesizer 23A signal exports through described power divider 23B
Being divided into two-way, the power level that wherein a road carries out necessity through described second adjustable attenuator 23D is adjusted
After joint, then delivering to described KID detector array through B port, described down coversion electricity is delivered on another road
Low-converter 22C in road 22；
Described KID detector array output signal enters in described lower frequency changer circuit 22 by C port,
Amplify through described first low-noise amplifier 22A and carry out necessity with described 3rd adjustable attenuator 22B
Power level adjust after, enter described low-converter 22C, with from described local oscillation signal produce electricity
The local oscillation signal source on road 3 carries out homodyne mixing, produces I, Q two-way direct current signal；
I, Q direct current signal exported by described low-converter is respectively by described first T-shaped bias device
22D and described second T-shaped bias device 22E, described first T-shaped bias device 22D and described 2nd T
Corresponding I, Q direct current signal is branched to described first T-shaped bias device 22D by type bias device 22E respectively
With described second T-shaped bias device 22E direct current signal modulate circuit 25；
I, Q that described direct current signal modulate circuit 25 accepts from the output of described lower frequency changer circuit 22 are straight
Stream signal, and pass through described 5th low pass filter 25A and the first direct current amplifier 25B respectively, with
And the 6th low pass filter 25C and the second direct current amplifier 25D carry out further signal filtering and straight
The data collecting card 32 delivered in described digital signal processing circuit 3 after banishing greatly counts simultaneously
Mould is changed；
I, Q two paths of signals is changed by the data collecting card 32 in described digital signal processing circuit 3
Data deliver to described control computer 5；
Described control computer 5 obtains described local oscillation signal and produces the frequency synthesizer 23A in circuit 23
I under frequency, and respective frequencies, Q data.I, Q signal are entered according to formula 1 and formula 2
Row process, can obtain described KID detector array transmission parameter S21 amplitude-frequency characteristic A (f) with
Phase frequency θ (f) characteristic,
F in formula (1) and formula (2) is local oscillation signal source frequency；
By described control computer 5 embedded software, transmission parameter S21 amplitude-frequency characteristic data are carried out base
Line plan, peak value lookup etc. one step data process, can obtain KID detector array resonator resonance frequency
The demarcation of spectrum；And
According to the I obtained, Q data, the S21 parameter of the resonator of matching each KID pixel, lead to
The data matching crossing described S21 parameter can realize the characteristic present of described KID detector array (Q because of
Son, the parameter such as resonant frequency).
Further, during described control computer 5 progressively arranges described local oscillation signal generation circuit 23
The signal source frequency of frequency synthesizer 23A is the resonant frequency of each road KID detector, at KID
After detector input adds stable black signal source, continuously acquire described digital signal processing circuit
The I of capture card 32 output in 3, Q data sequence, and carry out the noise spectrum process of correspondence and divide
Analysis, can obtain the noiseproof feature of each KID detector (containing reading circuit system), it is achieved KID visits
The noiseproof feature surveying device array characterizes.
Two, according to the KID detector array resonator resonant frequency obtained, KID detector array is carried out
Row detectable signal reads, and specifically includes and implement step as follows:
Local oscillation signal in described signal processing circuit of intermediate frequency 2 is produced the microwave switch 23C of circuit 23
It is allocated to described up-converter circuit 21, and is connected with described upconverter 21C；
By described synchronous clock circuit 4 and described waveform generator 1, described signal processing circuit of intermediate frequency 2,
Described digital processing circuit 3 connects, and adjusts described signal processing circuit of intermediate frequency 2 all parts work
Make a little；
The KID detector array resonator resonant frequency that will be obtained by described control computer 5, is borrowed
Help embedded software to form multi-tone signal Wave data, send to described waveform generator 1；
Described waveform generator 1 is according to multi-tone signal Wave data, multitone simulation I, Q of output base band
In the up-converter circuit 21 of orthogonal signalling extremely described signal processing circuit of intermediate frequency 2；
Described up-converter circuit 21 is by described first low pass filter 21A and described second low pass filtered
I, Q road signal that described waveform generator is exported by ripple device 21B respectively carries out low-pass filtering to filter
Unnecessary interference signal, and deliver to described converter 21C and carry out single-side belt up-conversion；
Regulate the frequency that described local oscillation signal produces the frequency synthesizer 23A of circuit 3 so that up-conversion
After multitone pumping signal mate one by one with KID detector array microwave resonator resonant frequency；
The intermediate-freuqncy signal of described converter 21C output carries out the power of necessity by adjustable attenuator 21D
After level adjusts, in port A delivers to KID detector array；
Output multi-tone signal is believed to described intermediate frequency by described KID detector array through port C input
Number process circuit 2 lower frequency changer circuit 22 in, described lower frequency changer circuit 22 to input multi-tone signal
The merit of necessity is carried out through described first low-noise amplifier 22A and described 3rd adjustable attenuator 22B
After the adjustment of rate level, send into described down coversion 22C and carry out down-converted；
Described low-converter 22C accepts to produce the basis of circuit 23 output from described local oscillation signal simultaneously
Shake signal, and the intermediate-freuqncy signal exported from KID detector array is become after down coversion I, Q
Two-way baseband signal (owing to local oscillation signal frequency is identical with during up-conversion), and respectively through described first
T-shaped bias device 22D and described second T-shaped bias device 22E carry out the input that shunts to follow-up described
In baseband signal modulate circuit 24；
Described baseband signal modulate circuit 24 is by described second low-noise amplifier 24A and low pass filtered
Ripple device 24B, and described 3rd low-noise amplifier 24C and described 4th low pass filter 24D enters
The further signal of row amplifies and after low-pass filtering, delivers to the FFT in described digital signal processing circuit 3
Audiofrequency spectrometer 31 carries out high-resolution real time spectrum process；
According to actual needs, described FFT spectrum instrument 31 can select I or Q road any one roadbed band
Signal carries out real time spectrum process, and spectral processing results is delivered to described control computer 5；And
Described control computer 5 obtains the frequency spectrum data of described FFT spectrum instrument 31 output, and combines
The KID detector array resonator resonant frequency previously obtained, reads corresponding KID detector array inspection
Survey signal message, if necessary, the detection after calibration can be obtained further according to certain calibration process
Signal intensity.
Compared to prior art, the multi-functional reading circuit system of the KID detector array that the present invention provides
System 100 can complete the microwave resonator of KID detector array in same reading circuit system
Resonant frequency is demarcated, and arranges AWG (Arbitrary Waveform Generator) generation excitation multi-tone signal according to spot frequency,
To realize the Terahertz detection signal of KID detector array.Therefore, described multi-functional reading circuit system
System 100 possesses the demarcation of KID detector array resonator resonant frequency, KID detector array performance table
Levy and the function such as KID detector array detectable signal reading.
It is obvious to a person skilled in the art that the invention is not restricted to the thin of above-mentioned one exemplary embodiment
Joint, and without departing from the spirit or essential characteristics of the present invention, it is possible to concrete with other
Form realizes the present invention.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary
, and be nonrestrictive, the scope of the present invention is limited by claims rather than described above
It is fixed, it is intended that all changes fallen in the implication of equivalency and scope of claim are included
In the present invention.Any reference in claim should not be considered as limit involved right want
Ask.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, but the most each
Embodiment only comprises an independent technical scheme, and this narrating mode of description is only is clear
Chu Qijian, those skilled in the art should be using description as an entirety, the technology in each embodiment
Scheme can also form, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that.
Claims (9)
1. the multi-functional reading circuit system of a KID detector array, it is characterised in that including:
Control the waveform generator of the pumping signal of computer, generation KID detector array, carry for each circuit
Supply the synchronous clock circuit of clock circuit synchronizing signal, realize described KID detector array in amplitude detection mode
Digital signal processing circuit that row detectable signal reads and being directly connected with described KID detector array
Audio signalprocessing circuit, at described waveform generator, described synchronous clock circuit and described digital signal
Reason circuit is connected with described control computer respectively, and described signal processing circuit of intermediate frequency is the most respectively with described
Waveform generator, described synchronous clock circuit and described digital signal processing circuit connect.
The multi-functional reading circuit system of KID detector array the most according to claim 1,
It is characterized in that: described waveform generator is AWG (Arbitrary Waveform Generator).
The multi-functional reading circuit system of KID detector array the most according to claim 1,
It is characterized in that: described digital signal processing circuit includes baseband signal is carried out real time spectrum process
FFT spectrum instrument and the data collecting card being connected with described FFT spectrum instrument, described FFT spectrum instrument and institute
State data collecting card to be connected with described control computer respectively.
The multi-functional reading circuit system of KID detector array the most according to claim 1,
It is characterized in that: described signal processing circuit of intermediate frequency include realizing single sideband singal up-converter circuit,
The local oscillation signal in local oscillation signal source is provided to produce circuit, complete baseband signal for pumping signal Up/Down Conversion
The lower frequency changer circuit of the shunting with direct current signal, the power level adjustment completing baseband signal and band tolerance
The baseband signal modulate circuit of system and complete homodyne and be mixed and to ensure that direct current signal level adjusts straight
Stream signal conditioning circuit, described up-converter circuit, described local oscillation signal produce circuit and described down coversion
Circuit is sequentially connected with, and described lower frequency changer circuit the most respectively with described baseband signal modulate circuit and described
Direct current signal modulate circuit connects.
5. the multi-functional reading circuit system of the KID detector array stated according to claim 4, its
It is characterised by: described up-converter circuit includes upconverter and be connected respectively with described upconverter
One low pass filter, the second low pass filter and the first adjustable attenuator, described first low pass filter
Being connected with described waveform generator the most respectively with the second low pass filter, described first adjustable attenuator is straight
Connect and be connected with described KID detector array.
The multi-functional reading circuit system of KID detector array the most according to claim 4,
It is characterized in that: described local oscillation signal produces circuit and includes that the frequency synthesizer being sequentially connected with, power divide
Orchestration, microwave switch and the second adjustable attenuator, described frequency synthesizer and described synchronous clock circuit
Connecting, described second adjustable attenuator is directly connected with described KID detector array.
The multi-functional reading circuit system of KID detector array the most according to claim 4,
It is characterized in that: described lower frequency changer circuit includes low-converter, the 3rd adjustable attenuator being sequentially connected with
The first T-shaped bias device of with the first low-noise amplifier and being connected with described low-converter respectively and
Second T-shaped bias device, described first low-noise amplifier is directly connected with described KID detector array,
Described first T-shaped bias device and described second T-shaped bias device all with described baseband signal modulate circuit and
Described direct current signal modulate circuit connects.
The multi-functional reading circuit system of KID detector array the most according to claim 4,
It is characterized in that: described baseband signal modulate circuit includes the 3rd low pass filter and being sequentially connected with
Two low-noise amplifiers and the 4th low pass filter being sequentially connected with and the 3rd low-noise amplifier,
Described 3rd low pass filter and described 4th low pass filter are all with described digital signal processing circuit even
Connect, described second low-noise amplifier and described 3rd low-noise amplifier all with described lower frequency changer circuit
Connect.
The multi-functional reading circuit system of KID detector array the most according to claim 4,
It is characterized in that: described direct current signal modulate circuit includes the first direct current amplifier and being sequentially connected with
Five low pass filters and the second direct current amplifier being sequentially connected with and the 6th low pass filter, described
First direct current amplifier and described second direct current amplifier are all connected with described digital signal processing circuit,
Described 5th low pass filter and described 6th low pass filter are all connected with described lower frequency changer circuit.
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| CN109186754A (en) * | 2018-08-06 | 2019-01-11 | 中国科学院紫金山天文台 | A kind of split type KIDs detector samples packaging system |
| CN109270375A (en) * | 2018-09-29 | 2019-01-25 | 中国科学院紫金山天文台 | Frequency discrimination type KIDs detector phase noise measurement circuit system and measurement method |
| CN109470936A (en) * | 2018-09-29 | 2019-03-15 | 中国科学院紫金山天文台 | KIDs noise of detector test circuit and test method based on active orthogonal frequency mixer |
| CN110023728A (en) * | 2016-12-14 | 2019-07-16 | 芬兰国家技术研究中心股份公司 | Method and apparatus for reading detector array |
| CN112563700A (en) * | 2020-08-13 | 2021-03-26 | 中国科学院国家天文台 | Submillimeter wave multi-band imaging superconducting band-pass filter array system and implementation method |
| CN115308485A (en) * | 2022-07-29 | 2022-11-08 | 中国科学院紫金山天文台 | Digital sideband separation spectral line receiving device and using method thereof |
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| CN112563700A (en) * | 2020-08-13 | 2021-03-26 | 中国科学院国家天文台 | Submillimeter wave multi-band imaging superconducting band-pass filter array system and implementation method |
| CN115308485A (en) * | 2022-07-29 | 2022-11-08 | 中国科学院紫金山天文台 | Digital sideband separation spectral line receiving device and using method thereof |
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