CN104852707B - The adjustable pulse base band generating means of Multipactor detection top bottom level and method - Google Patents
The adjustable pulse base band generating means of Multipactor detection top bottom level and method Download PDFInfo
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- CN104852707B CN104852707B CN201510210193.8A CN201510210193A CN104852707B CN 104852707 B CN104852707 B CN 104852707B CN 201510210193 A CN201510210193 A CN 201510210193A CN 104852707 B CN104852707 B CN 104852707B
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Abstract
The present invention proposes a kind of Multipactor detection top adjustable pulse base band generating means of bottom level, including：Circuit, D/A converter, attenuation Linear Control drive circuit and voltage-controlled attenuator occur for linearly modulated signal；Linearly modulated signal occurs circuit and realized by FPGA, circuit, which occurs, for linearly modulated signal includes narrow pulse signal generating unit and top bottom level coding unit, and narrow pulse signal generating unit, top bottom level coding unit, D/A converter and attenuation Linear Control drive circuit produce pulse baseband signal.The top adjustable pulse signal of bottom level is fed directly to the control terminal of voltage-controlled attenuator by the adjustable pulse base band generating means of top bottom level of the present invention after the conditioning of attenuation Linear Control drive circuit；When pulse-modulated signal produces, step is saved；Bottom voltage controllable pulse baseband signal application in top is convenient, simple to operate, it is only necessary to sets the output that required pulse signal can be achieved in top magnitude of voltage, bottom magnitude of voltage.
Description
Technical field
The present invention relates to technical field of measurement and test, more particularly to a kind of pulse base band generating means, a kind of pulse base is further related to
Band method for generation.
Background technology
Multipactor is also known as multipactor, refers under vacuum, and free electron is in additional radiofrequency field
Acceleration under, the secondary and multiplier effect that are excited between two metal surfaces or on single dielectric surface, be a kind of
Vacuum resonant discharge phenomenon, it is a highly important factor for influenceing space electronic equipment dependability.
Multipactor is occurred mainly in the microwave system of spacecraft and aviation near space.The big work(of current spacecraft
The peak power magnitude of rate microwave equipment has reached more than kW levels, along with the continuous improvement of power magnitude, stands in the breach
The major issue to be solved is exactly HIGH-POWERED MICROWAVES device part intrinsic Multipactor under vacuum conditions.It is if high-power
The micro-discharge threshold backlog demand of microwave device part, it is in self structure size, microwave frequency, electromagnetic field intensity, material table
When the parameters such as face secondary electron yield meet certain condition, caused micro discharge phenomenon can be caused under microwave system gain
Drop, transmission performance degenerates, signal noise increases, and makes microwave system cisco unity malfunction.In the case of certain, micro discharge phenomenon can be made
The outlets such as dielectric material, bonding agent into microwave device part, local low vacuum condition is formed, at this moment microwave electric field may make low true
The gas molecule ionization of Altitude, produce the low pressure discharge phenomenons such as power disruption, arc discharge, caused high temperature dense ionization effect
Microwave system should can be burnt out, working life terminates in advance, spacecraft the catastrophic failure thoroughly to fail is occurred.Therefore space flight is big
Power microwave device components ' load is being developed, produced to the experimental test that vacuum micro discharge will be done using each link, with checking
Whether micro-discharge threshold meets real work requirement, ensures the normality of system in orbit.
The Multipactor detection of spacecraft HIGH-POWERED MICROWAVES device components ' load needs can for measured piece input top bottom power
The pulse excitation signal of tune.Traditionally the generation of pulse-modulated signal is to select two electronic switches to realize that concrete principle is such as by one
Shown in Fig. 1, input as continuous wave signal, switching channel realizes that modulation is defeated to electronic switch repeatedly under the control of pulse baseband signal
Go out, pulse baseband signal is TTL or CMOS low and high level signals.
At this stage Multipactor detection in push up bottom power adjustable pulse-modulated signal realization principle as shown in Fig. 2
It is to improve to realize on the basis of traditional pulse modulation, modulating unit control signal is in addition to normal pulsed baseband signal, also
Add adjustable attenuator attenuation digital control signal.According to the pulse-modulated signal top bottom power ratio of test requirements document defined,
Attenuation digital control signal generator produces two groups of digital codings, two attenuators is configured, attenuator attenuation is set up
Cheng Hou, impulse generator output pulse baseband signal control two electronic switches to switch over, and two kinds of control signals are combined altogether
With the complete base band control signal of composition.
As shown in figure 3, the generation of modulating unit control signal is all realized in FPGA at this stage, mainly by two parts structure
Into：
(1) generation of normal pulsed signal：Realized by pulse-period counter, pulsewidth counter and pulsewidth fine tuning unit,
Pulse signal controls electronic switch action after carrying out shaping, driving compensation after producing in normal pulsed signal conditioning circuit；
(2) generation of attenuation control coding：Under the control of master controller, attenuation control is carried out inside FPGA and is compiled
Parallel output after code, after after attenuation controls coding buffer circuit to carry out power drive to adjustable attenuator.
The control signal of pulse modulation unit is realized by normal pulsed signal and attenuation control coded combination at this stage
, not simple pulse baseband signal, attenuation control coding is first produced during use, attenuator attenuation is set, two
After attenuator attenuation difference meets test requirements document, trigger generator output pulse, controlling switch periodically switches, therefore
Operationally need step by step, arrange in order, add test complexity.
The content of the invention
To solve the defects of prior art and deficiency, according to the Multipactor testing requirements of microwave device components ' load, sheet
Invention provides a kind of adjustable pulse base band generating means of top bottom level and method for Multipactor detection.
The technical proposal of the invention is realized in this way：
A kind of Multipactor detection top adjustable pulse base band generating means of bottom level, including：Linearly modulated signal is sent out
Raw circuit, D/A converter, attenuation Linear Control drive circuit and voltage-controlled attenuator, wherein, circuit occurs for linearly modulated signal
Realized by FPGA, circuit, which occurs, for linearly modulated signal includes narrow pulse signal generating unit and top bottom level coding unit, narrow arteries and veins
Rush signal generating unit, top bottom level coding unit, D/A converter and attenuation Linear Control drive circuit and produce pulse base band
Signal；
The narrow pulse signal generating unit includes pulse-period counter, pulsewidth counter and pulsewidth fine tuning module, main
For controller after human-computer interaction interface obtains pulse parameter, control narrow pulse signal generating unit produces corresponding common burst pulse
Baseband signal, input to top bottom level coding unit；
Master controller obtains the ratio between pulse-modulated signal top power arranges value, top power and bottom power arranges value,
Control top bottom level coding unit produces corresponding pulses signal top level value and two groups of digital codings of bottom level value, common
The triggering periodical output of pulse signal, digital-to-analogue conversion is carried out in D/A converter, exports complete analog pulse base band letter
Number；
After the analog pulse baseband signal conditioning that attenuation Linear Control drive circuit exports D/A converter, input is extremely
Voltage-controlled attenuator control terminal, control voltage-controlled attenuator periodically switch between two attenuations.
Alternatively, two groups of digital codings are exported to D/ under the triggering of narrow pulse signal rising edge and trailing edge respectively
A converters.
Alternatively, the D/A converter is high-speed and high simulation output timing indicator D/A.
Based on above-mentioned pulse base band generating means, it is adjustable to detect top bottom level present invention also offers a kind of Multipactor
Pulse base band method for generation, pulse baseband signal changed by narrow pulse signal generating unit, top bottom level coding unit, D/A
Device and attenuation Linear Control drive circuit produce；
After human-computer interaction interface obtains pulse parameter, control narrow pulse signal generating unit produces corresponding master controller
Common burst pulse baseband signal, input to top bottom level coding unit；
Master controller obtains the ratio between pulse-modulated signal top power arranges value, top power and bottom power arranges value,
Control top bottom level coding unit produces corresponding pulses signal top level value and two groups of digital codings of bottom level value, common
The triggering periodical output of pulse signal；
Two groups of digital codings export to D/A converter and carry out digital-to-analogue conversion, export complete analog pulse baseband signal；
Attenuation Linear Control drive circuit will be inputted after the conditioning of analog pulse baseband signal that D/A converter exports to declining
Subtract device control terminal, control attenuator periodically switches between two attenuations, realizes the controllable impulse modulation letter of top bottom power
Number output.
Alternatively, the narrow pulse signal generating unit includes pulse-period counter, pulsewidth counter and pulsewidth fine tuning
Module.
Alternatively, two groups of digital codings export to D/A under the triggering of narrow pulse signal rising edge and trailing edge turn respectively
Parallel operation carries out digital-to-analogue conversion.
Alternatively, the D/A converter is high-speed and high simulation output timing indicator D/A.
The beneficial effects of the invention are as follows：
(1) pulse-modulated signal is output to voltage-controlled attenuator control terminal, it is only necessary to which pulse base can be achieved in signal, a step all the way
Band signal；
(2) application of pulse baseband signal is convenient, simple to operate, it is only necessary to sets top magnitude of voltage, bottom magnitude of voltage
The output of pulse signal needed for realization.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is traditional impulse modulation principle control block diagram；
Fig. 2 is the pulse-modulated signal realization principle control block diagram of existing top bottom power adjustable；
Fig. 3 is the pulse-modulated signal generation device control block diagram of the existing top bottom power adjustable realized by FPGA；
Fig. 4 is the pulse-modulated signal generation device control block diagram of the top bottom power adjustable of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The invention provides it is a kind of for Multipactor detection the adjustable pulse base band generating means of top bottom level with
Method, using the combination of pulse signal top bottom level coding technology, narrow pulse signal generation technique and D/A switch technologies,
The generation of the top adjustable pulse base band control signal of bottom level is realized, for the top bottom power adjustable needed for Multipactor detection
Pulse-modulated signal generating means provides control signal, realizes the generation of the top adjustable pulse base band control signal of bottom level.
Below in conjunction with the accompanying drawings to the present invention Multipactor detection top the adjustable pulse base band generating means of bottom level with
Method is described in detail.
The actual requirement that the present invention detects according to Multipactor, with reference to existing top bottom power adjustable pulse-modulated signal
Realization principle, pulse-modulated signal output by single high-speed electric control attenuator and push up bottom level it is controllable pulse base band letter
Number realize.As shown in figure 4, the adjustable pulse base band generating means of top bottom level of the present invention, which includes linearly modulated signal, occurs electricity
Road, D/A converter, attenuation Linear Control drive circuit and high-speed electric control attenuator, wherein, circuit occurs for linearly modulated signal
Realized by FPGA.Pulse baseband signal is by narrow pulse signal generating unit, top bottom level coding unit, D/A converter and decay
Linear Control drive circuit is measured to produce.
Narrow pulse signal generating unit includes pulse-period counter, pulsewidth counter and pulsewidth fine tuning module, main control
For device after human-computer interaction interface obtains pulse repetition, dutycycle isopulse parameter, control narrow pulse signal generating unit produces phase
The common burst pulse baseband signal answered, input to top bottom level coding unit.
Master controller obtains the ratio between pulse-modulated signal top power arranges value, top power and bottom power arranges value,
Control top bottom level coding unit produces corresponding pulses signal top level value and two groups of digital codings of bottom level value, common
Under the triggering of pulse signal, periodically export.Two groups of digital codings are respectively in the triggering of narrow pulse signal rising edge and trailing edge
Lower output carries out digital-to-analogue conversion, preferably high-speed and high simulation output timing indicator D/A, while push up bottom level to D/A converter
Coding unit also produces the control signal of D/A chips.
According to the different demands of user, top bottom level coding unit can be changed to other coding units or the group that alternates coding
Conjunction mode, you can realize other kinds of baseband signal output.
High-speed realizes that bottom level coding unit in top exports two groups of digitally coded numbers with high simulation output timing indicator D/A
Mould is changed, and exports complete analog pulse baseband signal.
Attenuation Linear Control drive circuit realizes the functions such as the anti-tampering protection of pulse signal shaping, small-signal, will adjust
Signal after reason is inputted to attenuator control terminal, control attenuator periodically to be switched between two attenuations, and top is realized with this
The output of the controllable pulse-modulated signal of bottom power.
The adjustable pulse base band generating means of top bottom level of the present invention need not individually produce narrow pulse signal and numerical control
Signal, therefore also without electronic switch and numerical-control attenuator is separately input into, the adjustable pulse signal of bottom level will be pushed up
The control terminal of voltage-controlled attenuator is fed directly to after the conditioning of attenuation Linear Control drive circuit；In pulse-modulated signal
During generation, it is not necessary to step by step, arrange in order, set attenuator attenuation and then ability defeated with the existing digital control signal that first exports
The method for going out pulse signal control electronic switch switching is compared, and is saved step, is shortened the time；Push up the controllable pulse of bottom voltage
Baseband signal application is convenient, simple to operate, it is only necessary to sets top magnitude of voltage, bottom magnitude of voltage and required pulse signal can be achieved
Output.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (7)
- A kind of 1. Multipactor detection top adjustable pulse base band generating means of bottom level, it is characterised in that including：It is linear to adjust Signal generating circuit, D/A converter, attenuation Linear Control drive circuit and voltage-controlled attenuator processed, wherein, linearly modulated signal Generation circuit is realized that circuit, which occurs, for linearly modulated signal includes narrow pulse signal generating unit and top bottom level coding list by FPGA Member, narrow pulse signal generating unit, top bottom level coding unit, D/A converter and attenuation Linear Control drive circuit produce Pulse baseband signal；The narrow pulse signal generating unit includes pulse-period counter, pulsewidth counter and pulsewidth fine tuning module, main control For device after human-computer interaction interface obtains pulse parameter, control narrow pulse signal generating unit produces corresponding common burst pulse base band Signal, input to top bottom level coding unit；Master controller obtains the ratio between pulse-modulated signal top power arranges value, top power and bottom power arranges value, control Push up bottom level coding unit and produce corresponding pulses signal top level value and two groups of digital codings of bottom level value, in common narrow arteries and veins The triggering periodical output of baseband signal is rushed, digital-to-analogue conversion is carried out in D/A converter, exports complete analog pulse base band letter Number；After the analog pulse baseband signal conditioning that attenuation Linear Control drive circuit exports D/A converter, input to automatically controlled Attenuator control terminal, control voltage-controlled attenuator periodically switch between two attenuations.
- 2. a kind of Multipactor detection top adjustable pulse base band generating means of bottom level as claimed in claim 1, it is special Sign is that two groups of digital codings are exported to D/A converter under the triggering of narrow pulse signal rising edge and trailing edge respectively.
- 3. a kind of Multipactor detection top adjustable pulse base band generating means of bottom level as claimed in claim 1, it is special Sign is that the D/A converter is high-speed and high simulation output timing indicator D/A.
- 4. a kind of Multipactor detection top adjustable pulse base band method for generation of bottom level, it is characterised in that pulse base band is believed Number produced by narrow pulse signal generating unit, top bottom level coding unit, D/A converter and attenuation Linear Control drive circuit It is raw；After human-computer interaction interface obtains pulse parameter, control narrow pulse signal generating unit produces corresponding common master controller Burst pulse baseband signal, input to top bottom level coding unit；Master controller obtains the ratio between pulse-modulated signal top power arranges value, top power and bottom power arranges value, control Push up bottom level coding unit and produce corresponding pulses signal top level value and two groups of digital codings of bottom level value, in common narrow arteries and veins Rush the triggering periodical output of baseband signal；Two groups of digital codings export to D/A converter and carry out digital-to-analogue conversion, export complete analog pulse baseband signal；Inputted after the analog pulse baseband signal conditioning that attenuation Linear Control drive circuit exports D/A converter to attenuator Control terminal, control attenuator periodically switch between two attenuations, realize the controllable pulse-modulated signal of top bottom power Output.
- 5. a kind of Multipactor detection top adjustable pulse base band method for generation of bottom level as claimed in claim 4, it is special Sign is that the narrow pulse signal generating unit includes pulse-period counter, pulsewidth counter and pulsewidth fine tuning module.
- 6. a kind of Multipactor detection top adjustable pulse base band method for generation of bottom level as claimed in claim 4, it is special Sign is that output to D/A converter is carried out two groups of digital codings under the triggering of narrow pulse signal rising edge and trailing edge respectively Digital-to-analogue conversion.
- 7. a kind of Multipactor detection top adjustable pulse base band method for generation of bottom level as claimed in claim 4, it is special Sign is that the D/A converter is high-speed and high simulation output timing indicator D/A.
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| DE102022113502A1 (en) | 2022-05-30 | 2023-11-30 | TRUMPF Hüttinger GmbH + Co. KG | Module and method for generating a pulsed microwave output signal |
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| CN109298235B (en) * | 2018-08-17 | 2021-05-28 | 北京优诺信创科技有限公司 | Micro-discharge power dynamic tracking method |
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| US6833691B2 (en) * | 2002-11-19 | 2004-12-21 | Power-One Limited | System and method for providing digital pulse width modulation |
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| CN201292907Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Ignition coil test device |
| CN102111134A (en) * | 2009-12-25 | 2011-06-29 | 产晶集成电路股份有限公司 | Drive device of pulse width modulation step wave and sine wave |
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Effective date of registration: 20190319 Address after: 266000 No. 98 Xiangjiang Road, Huangdao District, Qingdao City, Shandong Province Patentee after: China Electronics Technology Instrument and Meter Co., Ltd. Address before: 266555 No. 98 Xiangjiang Road, Qingdao economic and Technological Development Zone, Shandong Patentee before: The 41st Institute of CETC |
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Address after: Huangdao Xiangjiang Road 266555 Shandong city of Qingdao Province, No. 98 Patentee after: CLP kesiyi Technology Co.,Ltd. Address before: 266000 No. 98 Xiangjiang Road, Huangdao District, Shandong, Qingdao Patentee before: CHINA ELECTRONIC TECHNOLOGY INSTRUMENTS Co.,Ltd. |