CN208836112U - A kind of self-mixing converter plant - Google Patents
A kind of self-mixing converter plant Download PDFInfo
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- CN208836112U CN208836112U CN201821603123.4U CN201821603123U CN208836112U CN 208836112 U CN208836112 U CN 208836112U CN 201821603123 U CN201821603123 U CN 201821603123U CN 208836112 U CN208836112 U CN 208836112U
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Abstract
The utility model discloses a kind of self-mixing converter plants.The device includes front end portion and self-mixing part, and wherein front end portion includes external antenna, two throw switch of hilted broadsword, sensitivity control attenuator and the first low-noise amplifier；Self-mixing part includes frequency band filter folding group, the first frequency mixer, power splitter, the second frequency mixer, the second bandpass filter, the 4th frequency mixer, limiting amplifier, bandpass filtering and delayer, the second low-noise amplifier, third frequency mixer, the 4th bandpass filter and the 4th low-noise amplifier.Pass through frequency band filter folding group first, after the radiofrequency signal in broadband being folded into narrow low frequency signal, after signal is upconverted to millimeter wave by changeable point frequency source signal, then two paths of signals is handled respectively after two power splitters, after finally two paths of signals is mixed, IF output signal is obtained.The utility model improves search speed and sensitivity, increases search range, and circuit size is small, simple process, at low cost.
Description
Technical field
The utility model relates to apply converter technique and microelectronics technology, especially a kind of self-mixing converter plant.
Background technique
The self-mixing converter plant of ultrafast search is a kind of for digital microwave telecommunication, radar, electronic countermeasure and guidance instrument
Simulation electronic component in the electronics systems such as device.In the receiver circuit of radiofrequency signal, need quickly to search for external
Signal, general receiver frequency conversion equipment are believed after frequency conversion output by constantly changing internal frequency sweep local oscillation signal
Number parsing calculate the design parameter of the radiofrequency signal being an actually-received.And the variable mode of self-mixing is used, being will be right
The signal frequency of outside detecting, folds by frequency band, then according to the correlation of signal, passes through and a frequency to folded signal
Source signal mixing after upconvert to millimeter wave frequency band after, function is divided into two channels and handles respectively, one of channel pass through through
New local oscillation signal relevant to radiofrequency signal that is detecting originally is obtained after crossing clipping, amplification, filtering, double conversion processing, separately
As the radiofrequency signal for participating in mixing after amplification, filtering and delay, final two channel signals pass through in an outer channel
The IF output signal needed after mixing frequency conversion.The key technical indexes for describing this properties of product has: 1) working frequency
Range；2) frequency switching time；3) receiving sensitivity；4) circuit size；5) signal transient bandwidth；6) system noise factor；7)
Total dynamic range；8) phase equalization.
Traditional searcher changes swept frequency due to needing continuously to be arranged, and is limited to continuous local oscillator Hopping time,
So the requirement for being unable to satisfy fast search, tracking external signal, causes to receive defect.Traditional searcher major defect
Have: 1) the search rate time is long；2) tracking velocity is slow；3) instantaneous following range is narrow；4) need not stop to adjust frequency sweep frequency when detecting
Rate, workload are very big；5) bandwidth of frequency sweep local oscillation signal needs wider；6) phase noise of system is low；7) what can be detected is sensitive
It is poor to spend；8) preselection filter quantity when frequency conversion is more；9) system debug heavy workload；10) it is influenced by process control parameter, electricity
Electrical property consistency is poor between road；11) circuit size is larger.
Summary of the invention
The purpose of this utility model is to provide one kind can fast search detecting receive that signal, receiving sensitivity are high, are
System debugging work load is small and is capable of the self-mixing converter plant of ultrafast search.
Realize the utility model aim technical solution be: a kind of self-mixing converter plant, including front end portion and from
Mixing portion, the front end portion include that external antenna, two throw switch of hilted broadsword, sensitivity control attenuator and the first low noise are put
Big device；The self-mixing part includes frequency band filter folding group, the first frequency mixer, power splitter, the second frequency mixer, the filter of the second band logical
Wave device, the 4th frequency mixer, limiting amplifier, bandpass filtering and delayer, the second low-noise amplifier, third frequency mixer, the 4th
Bandpass filter and the 4th low-noise amplifier；
The ultra-wide band radio-frequency signal of input is then low by sensitivity control decaying and first by two throw switch of hilted broadsword
After noise amplifier amplifies signal, into frequency band filter folding group, Frequency mixing processing is carried out with first~bis- frequency source, is connect
Enter the first frequency mixer, with third~five frequency source Frequency mixing processing after upconvert to millimeter wave frequency band, will be high obtained by up-conversion
Frequency signal divides two paths of signals by power splitter function, and signal all the way therein enters the second frequency mixer and the first local vibration source carries out frequency conversion
Processing carries out second of frequency-conversion processing into the 4th frequency mixer and the second local vibration source, then passes through after the second bandpass filter
After crossing limiting amplifier, third frequency mixer is sent into as local oscillation signal relevant to input signal；In addition signal passes through band all the way
After pass filter and delayer, the second low-noise amplifier, it is sent into third frequency mixer；Third frequency mixer is by receive two kinds of signals
Frequency mixing processing is carried out, finally after the 4th bandpass filter and the processing of the 4th low-noise amplifier, exports intermediate-freuqncy signal.
Further, K1 control bit is connected with two throw switch of hilted broadsword, and K2 control bit is connected with sensitivity control attenuator
It connects, K3 control bit is connected with frequency band filter folding group, and K1, K2, K3 are independent TTL control signal, according to output signal
Frequency and amplitude size adjust control switch control bit.
Further, described first~five frequency source and the first~bis- local vibration source are using constant-temperature crystal oscillator direct frequency doubling
The frequency source of synthesis and generation, the reference frequency of all signal sources are with the same phase of frequency, and the output of maximal end point frequency source reaches phase and makes an uproar
Sound -97~-100dBc/Hz@1KHz, and different output frequencies can be switched by high-speed switch, the speed of switching is small
In 150nS.
Compared with prior art, remarkable advantage is the utility model: (1), using the point frequency source being switched fast replacing slow
Speed control frequency sweep local vibration source, accelerates search speed, improves the validity of tracking；(2), instantaneous search range is big, improves
Instantaneous catch rate；(3), circuit size is small, and filter quantity is few；(4), at low cost, simple process；(5), frequency conversion system only needs to use
Point frequency source；(6) system phase noise is low；(7) high sensitivity.Circuit topological structure is simple, design is easy, technology difficulty is small,
Detailed description of the invention
Fig. 1 is the structural block diagram of the utility model self-mixing converter plant.
Fig. 2 is the control method flow diagram of the utility model.
Specific embodiment
The utility model self-mixing converter plant, including front end portion and self-mixing part, the front end portion include outer
Portion's antenna, two throw switch S1 of hilted broadsword, sensitivity control attenuator S2 and the first low-noise amplifier F1；The self-mixing part packet
Include frequency band filter folding group B1, the first frequency mixer M1, power splitter P1, the second frequency mixer M2, the second bandpass filter B2, the 4th mixed
Frequency device M4, limiting amplifier F3, bandpass filtering and delayer B3, the second low-noise amplifier F2, third frequency mixer M3, the 4th band
Bandpass filter B4 and the 4th low-noise amplifier F4；
The ultra-wide band radio-frequency signal Sin RF of input, by two throw switch S1 of hilted broadsword, then by sensitivity control decaying
After S2 and the first low-noise amplifier F1 amplifies signal, into frequency band filter folding group B1, with first~bis- frequency source
LO1, LO2 carry out Frequency mixing processing, the first frequency mixer M1 are subsequently entered, with third~five frequency source LO3, LO4, LO5 Frequency mixing processing
After upconvert to millimeter wave frequency band, divide high-frequency signal obtained by up-conversion to two paths of signals by power splitter P1 function, it is therein all the way
Signal enters the second frequency mixer M2 and the first local vibration source LO6 progress frequency-conversion processing, after the second bandpass filter B2, into the
Four frequency mixer M4 and the second local vibration source LO7 carry out second of frequency-conversion processing, then after limiting amplifier F3, as with input
The relevant local oscillation signal of signal is sent into third frequency mixer M3；In addition all the way signal by bandpass filtering and delayer B3, second low
After noise amplifier F2, it is sent into third frequency mixer M3；Receive two kinds of signals are carried out Frequency mixing processing by third frequency mixer M3, most
Afterwards after the 4th bandpass filter B4 and the 4th low-noise amplifier F4 processing, intermediate-freuqncy signal Sout IF is exported.
Further, K1 control bit is connected with two throw switch S1 of hilted broadsword, and K2 control bit and sensitivity control attenuator S2
It is connected, K3 control bit is connected with frequency band filter folding group B1, and K1, K2, K3 are independent TTL control signal, according to output
The frequency and amplitude size of signal adjust control switch control bit.
Further, described first~five frequency source LO1, LO2, LO3, LO4, LO5 and the first~bis- local vibration source LO6,
LO7 is the frequency source for being synthesized and being generated using constant-temperature crystal oscillator direct frequency doubling, and the reference frequency of all signal sources is the same same phase of frequency,
The output of maximal end point frequency source reaches phase noise -97~-100dBc/Hz@1KHz, and can be switched by high-speed switch different
The speed of output frequency, switching is less than 150nS.
With reference to the accompanying drawing and specific embodiment is described in further detail the utility model.
Embodiment
In conjunction with Fig. 1, a kind of self-mixing converter plant of ultrafast search of the present embodiment, including two large divisions: front end portion and
Self-mixing part, the front end portion include external antenna, two throw switch S1 of hilted broadsword, sensitivity control attenuator S2 and first it is low
Noise amplifier F1；The self-mixing part includes frequency band filter folding group B1, the first frequency mixer M1, power splitter P1, second mixed
Frequency device M2, the second bandpass filter B2, the 4th frequency mixer M4, limiting amplifier F3, bandpass filtering and delayer B3, the second low noise
Acoustic amplifier F2, third frequency mixer M3, the 4th bandpass filter B4 and the 4th low-noise amplifier F4；
In conjunction with Fig. 2, the control flow of the self-mixing converter plant of the ultrafast search of the present embodiment are as follows: received according to external antenna
High frequency radio signals Sin RF enter device, carry out switching by two throw switch S1 of hilted broadsword and self-test signal, selected
Select external signal or self-test signal；Then by sensitivity control attenuator S2, the first low-noise amplifier F1 to signal
After carrying out low noise amplification raising receiving sensitivity, it is sent into the selection processing that frequency band filter folding group B1 carries out switch frequency range, system
One is converted to low radiofrequency signal, and signal enters after the first frequency mixer M1 and is divided to two channels by power splitter P1 function, and therein one
A channel is after the second frequency mixer M2, after the second bandpass filter B2, the 4th frequency mixer M4 and limiting amplifier F3, as this
Vibration signal passes through after bandpass filtering and delayer B3, the second low-noise amplifier F2 processing with an other channel signal
Frequency mixer M3 frequency-conversion processing becomes in Sout then after the 4th bandpass filter B4, the 4th low-noise amplifier F4 amplification
Frequency signal.
Being connected with two throw switch S1 of hilted broadsword is K1 1bit control bit, and being connected with sensitivity control S2 is K2
1bit control bit, the respectively K3 2bit control bit and point frequency source LO1 and LO2 being connected with frequency band folding filter group B1, with
It is frequency source LO3, LO4 and LO5 that frequency mixer M1, which is connected, and being separately connected with M2 and M5 is frequency source a LO6 and LO7.
Further, for inputting ultra-wide band radio-frequency signal, by two throw switch S1 of hilted broadsword, two throw switch of hilted broadsword is necessary
Meet two conditions: first, there is the isolation greater than 60dB；Second, there is phase stability；Then it is controlled by sensitivity
Attenuator S2 and low-noise amplifier F1 amplify signal, and amplified signal connects frequency band filter folding group B1, with point
Frequency source frequency conversion LO1, LO2 carry out Frequency mixing processing, and external wideband input signal is folded into low-frequency range by three groups of filters, improve
Its is spuious and reduces system phase noise；Then it connects the first frequency mixer M1 and puts frequency source frequency conversion LO3, LO4, LO5 Frequency mixing processing
After upconvert to millimeter wave frequency band, then divide two paths of signals, signal all the way therein by power splitter P1 function to high-frequency signal
Frequency-conversion processing is carried out into the second frequency mixer M2 and local vibration source LO6, after the second bandpass filter B2, into the 4th frequency mixer
M4 and local vibration source LO7 carries out second of frequency-conversion processing, then after limiting amplifier F3, as relevant to input signal
The signal that shakes is sent into third frequency mixer M3；In addition signal all the way passes through bandpass filtering and delayer B3, the second low-noise amplifier
After F2, it is sent into third frequency mixer M3；Receive two kinds of signals are carried out Frequency mixing processing by third frequency mixer M3, finally pass through the 4th
After bandpass filter B4 and the 4th low-noise amplifier F4 processing, intermediate-freuqncy signal Sout IF required for exporting.
Further, point frequency source LO1, LO2, LO3, LO4, LO5, LO6 and LO7 is synthesized using constant-temperature crystal oscillator direct frequency doubling
And the frequency source of the Low phase noise, low spurious generated, the reference frequency of all signal sources are with the same phase of frequency, the output of maximal end point frequency source
It can achieve phase noise -97~-100dBc/Hz@1KHz, and different output frequencies can be switched by high-speed switch, open
The speed that concern is changed is less than 150nS, effectively raises the speed of detection signal, can quickly capture the letter of external jump
Number.
Further, the self-mixing converter plant of the ultrafast search of the utility model, by the frequency-conversion processing to input signal,
Signal relevant to the signal of input is extracted as local oscillation signal, being suitable for aspect is continuous wave and pulse signal.
And the signal after frequency conversion does not need adjustment local oscillation signal, penetrates as long as input signal is fallen in corresponding local oscillator window
The variation of frequency signal corresponds to identical intermediate-freuqncy signal always, and signal processing is simple and convenient, and the dynamic range of system is big, and phase is made an uproar
Sound is low, high sensitivity.
Control to two throw switch S1 of hilted broadsword can pass through outside source self-checking system working condition；
Sensitivity control to internal binary states numerical-control attenuator, can be improved the reception dynamic range of system；
Internal point frequency source is switched fast, bandwidth of operation can be shunk, specifically: by control unit, first determine whether
Output signal frequency and amplitude, if output amplitude value is lower than after detection threshold value, control unit is switched fast internal point frequency source
Signal, while amplitude output signal and frequency are detected, until output signal frequency and amplitude are stopped after meeting detectable sensitivity
Only；
Limited range enlargement processing, can provide the constant local oscillation signal not changed with input power, meet the dynamic model of system
Requirement is enclosed, by the signal to large change range, after casacade multi-amplifier gradually amplifies, due to the output P1dB of amplifier
Clipping, guarantee to inputting large-scale signal.
In conclusion the self-mixing converter plant of the ultrafast search of the utility model, judges that control improves system by sensitivity
The receiving sensitivity of system receiver reduces bandwidth of operation by frequency band filter folding group, by becoming to folded frequency
Frequency processing separation local oscillation signal, then carries out Frequency mixing processing with radiofrequency signal, achievees the purpose that fast search.
Claims (3)
1. a kind of self-mixing converter plant, which is characterized in that including front end portion and self-mixing part, the front end portion includes
External antenna, two throw switch of hilted broadsword (S1), sensitivity control attenuator (S2) and the first low-noise amplifier (F1)；It is described certainly mixed
Frequency part includes frequency band filter folding group (B1), the first frequency mixer (M1), power splitter (P1), the second frequency mixer (M2), the second band
Bandpass filter (B2), the 4th frequency mixer (M4), limiting amplifier (F3), bandpass filtering and delayer (B3), the second low noise are put
Big device (F2), third frequency mixer (M3), the 4th bandpass filter (B4) and the 4th low-noise amplifier (F4)；
The ultra-wide band radio-frequency signal (Sin RF) of input, by two throw switch of hilted broadsword (S1), then by sensitivity control decaying
(S2) and after the first low-noise amplifier (F1) amplifies signal, into frequency band filter folding group (B1), with the first~bis-
Point frequency source (LO1, LO2) carry out Frequency mixing processing, subsequently enter the first frequency mixer (M1), with third~five frequency source (LO3, LO4,
LO5 millimeter wave frequency band) is upconverted to after Frequency mixing processing, divides two-way to believe by power splitter (P1) function high-frequency signal obtained by up-conversion
Number, signal all the way therein enters the second frequency mixer (M2) and the first local vibration source (LO6) and carries out frequency-conversion processing, by the second band logical
After filter (B2), second of frequency-conversion processing is carried out into the 4th frequency mixer (M4) and the second local vibration source (LO7), then by limit
After width amplifier (F3), third frequency mixer (M3) is sent into as local oscillation signal relevant to input signal；In addition signal passes through all the way
After crossing bandpass filtering and delayer (B3), the second low-noise amplifier (F2), it is sent into third frequency mixer (M3)；Third frequency mixer
(M3) receive two kinds of signals are subjected to Frequency mixing processing, finally pass through the 4th bandpass filter (B4) and the 4th low noise amplification
After device (F4) processing, export intermediate-freuqncy signal (Sout IF).
2. self-mixing converter plant according to claim 1, which is characterized in that K1 control bit and two throw switch of hilted broadsword (S1)
It is connected, K2 control bit is connected with sensitivity control attenuator (S2), and K3 control bit is connected with frequency band filter folding group (B1)
It connects, K1, K2, K3 are independent TTL control signal, according to the frequency of output signal and the adjustment control switch control of amplitude size
Position.
3. self-mixing converter plant according to claim 1, which is characterized in that described first~five frequency source (LO1,
LO2, LO3, LO4, LO5) and the first~bis- local vibration source (LO6, LO7) be using constant-temperature crystal oscillator direct frequency doubling synthesize and generate
Frequency source, the reference frequencies of all signal sources be with the same phase of frequency, the output of maximal end point frequency source reach phase noise -97~-
100dBc/Hz@1KHz, and different output frequencies can be switched by high-speed switch, the speed of switching is less than 150nS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821603123.4U CN208836112U (en) | 2018-09-29 | 2018-09-29 | A kind of self-mixing converter plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821603123.4U CN208836112U (en) | 2018-09-29 | 2018-09-29 | A kind of self-mixing converter plant |
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| Publication Number | Publication Date |
|---|---|
| CN208836112U true CN208836112U (en) | 2019-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821603123.4U Withdrawn - After Issue CN208836112U (en) | 2018-09-29 | 2018-09-29 | A kind of self-mixing converter plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150207A (en) * | 2018-09-29 | 2019-01-04 | 扬州海科电子科技有限公司 | A kind of self-mixing converter plant |
-
2018
- 2018-09-29 CN CN201821603123.4U patent/CN208836112U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109150207A (en) * | 2018-09-29 | 2019-01-04 | 扬州海科电子科技有限公司 | A kind of self-mixing converter plant |
| CN109150207B (en) * | 2018-09-29 | 2023-09-29 | 扬州海科电子科技有限公司 | Self-mixing frequency conversion device |
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Granted publication date: 20190507 Effective date of abandoning: 20230929 |
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Granted publication date: 20190507 Effective date of abandoning: 20230929 |
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