CN104270170A - Electric pulse transmission system - Google Patents
Electric pulse transmission system Download PDFInfo
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- CN104270170A CN104270170A CN201410471571.3A CN201410471571A CN104270170A CN 104270170 A CN104270170 A CN 104270170A CN 201410471571 A CN201410471571 A CN 201410471571A CN 104270170 A CN104270170 A CN 104270170A
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- mcp
- microstrip line
- electric pulse
- cable
- transmission system
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Abstract
The invention relates to an electric pulse transmission system which comprises an input end connector, cables, an MCP microstrip line and an output end connector. The MCP microstrip line is connected with the input end connector and the output end connector through the cables. The characteristic impedance of the input end connector, the characteristic impedance of the cables and the characteristic impedance of the output end connector are each identical to that of the MCP microstrip line. According to the electric pulse transmission system, the impedances are completely matched, and electric pulse waveform distortion and voltage losses caused by gradual change matching can be eliminated fundamentally.
Description
Technical field
The invention belongs to inertial confinement fusion diagnostic techniques field, relate to a kind of electric pulse transmission system, particularly relate to a kind of microchannel plate travelling wave gating framing camera electricity consumption pulse transmission system.
Background technology
Microchannel plate (MCP) travelling wave gating framing camera is a kind of two dimensional image acquisition device, for the ultrafast phenomenon diagnosis in X ray and ultraviolet spectral range, its range of application covers the Overseas New subjects such as nuclear physics, Biomedical Photonics, plasma physics, Strong-field physics, is inertial confinement fusion test necessary diagnostic device used.
Microchannel plate travelling wave gating framing camera microstrip line transmission system used is mainly divided into 5 parts.1. signal input part (50 ohm of SMA); 2. 50 ohm are arrived Z
mCP(characteristic impedance of the au cathode microstrip line that MCP is coated with is Z to ohm
mCP) input gradual change microstrip line; 3. the au cathode microstrip line (being called for short: MCP microstrip line) MCP is coated with; 4. Z
mCPohm is to the output gradual change microstrip line of 50 ohm; 5. signal output part (50 ohm of SMA).During framing camera work, high pressure gating electric pulse transmits over the whole system, and when approach MCP microstrip line, the photoelectron being strobed region generation is amplified by MCP multiplication.The shape of electric pulse, amplitude directly affect temporal resolution and the flatness of framing camera.When electric pulse transmits on the microstrip line, be mainly subject to the impact of transmission line structure and impedance variation and change.Therefore electric pulse Lossless transport how is made to be the problem that diagnostic techniques personnel endeavour to solve always.
Traditional electric pulse transmission system adopts gradual change microstrip line matching method, as mentioned above.It reduces the impact of reflected signal on electric pulse to a certain extent, but reduces reflected signal effect because gradual change microstrip line needs long enough just can play, so framing camera complete machine structure is larger, micro-strip line impedance matching structure is complicated.When framing camera size by condition affect can not do large time, the effect of gradual change microstrip line is just not obvious.And gradual change microstrip line, just by reflected signal homogenizing, fundamentally can not be eliminated the impact of reflected signal on electric pulse, still can cause certain image fault, cause diagnostic error.
Summary of the invention
In order to solve the above-mentioned technical problem existed in background technology, the invention provides a kind of impedance and mating completely and fundamentally can solve gradual change and mate the electric pulse waveform distortion and the electric pulse transmission system of voltage loss that cause.
Technical solution of the present invention is: the invention provides a kind of electric pulse transmission system, its special character is: described electric pulse transmission system comprises input connector, cable, MCP microstrip line and output connector; MCP microstrip line is connected with input connector and output connector respectively by cable; The characteristic impedance of the described characteristic impedance of input connector, the characteristic impedance of cable and output connector is identical with the characteristic impedance of MCP microstrip line respectively.
Above-mentioned MCP microstrip line is connected with input connector and output connector respectively by single or multi-cable.
When above-mentioned cable is many, described multi-cable is parallel with one another.
When above-mentioned cable is many, the quantity of described input connector or the coupled respectively cable of output connector is corresponding.
The characteristic impedance of above-mentioned MCP microstrip line is obtained by the actual measurement of TDR impedance instrument.
Advantage of the present invention is:
The invention provides a kind of electric pulse transmission system being applicable to framing camera, no longer adopt traditional gradual change microstrip line mode, but in a whole set of transmission system, all adopt the matching way consistent with MCP microstrip line characteristic impedance value, each Coupling point is mated completely, there will not be pip, namely sending-end impedance is Z
mCPconnector and impedance be Z
mCPinput cable be connected, cable is connected with MCP microstrip line again, and microstrip line is Z with impedance again
mCPoutput cable be connected, cable and output impedance are Z
mCPconnector be connected.The present invention adopts and MCP micro-strip line impedance coupling matching direct with the cable of MCP microstrip line same characteristic features impedance, fundamentally eliminate the voltage reflection that impedance discontinuity causes, the connector of same characteristic features impedance is adopted to also eliminate the voltage reflection of input/output terminal, make electric pulse produce distortion, fundamentally solve the technical problem that electric pulse waveform distortion and the voltage loss caused is mated in gradual change.Meanwhile, the present invention can also reduce the physical dimension of framing camera greatly, required design structure, makes it widely in various diagnostic system.
Accompanying drawing explanation
Fig. 1 is the structural schematic block diagram of electric pulse transmission system provided by the present invention;
Fig. 2 is the topological schematic diagram of Fig. 1;
Wherein:
1-MCP (microchannel plate); 2-microstrip line; 3-input connector; The cable that 4-is connected with input connector; The cable that 5-is connected with output connector; 6-output connector.
Embodiment
Operation principle of the present invention is: do not re-use gradual change microstrip line, and adopt cable directly to transmit, and changes 4 parts in said system 5 parts, is implemented as follows:
MCP microstrip line characteristic impedance Z is obtained by actual measurement
mCP.Customization and MCP microstrip line characteristic impedance Z
mCPidentical input connector, output connector and cable, replace original 50 ohm of connectors (input and output) and gradual change microstrip line (input and output).
Below in conjunction with accompanying drawing, the present invention is described in detail.
In travelling wave gating framing camera design process, due to not mating of each point impedance, cause producing reflection in electric pulse transmitting procedure, thus cause the distortion of electric pulse waveform, finally cause the inhomogeneities of framing camera gain.In order to eliminate impedance mismatch point, devise electric pulse transmission system as shown in Figure 1, MCP (microchannel plate) 1 is coated with the transmission line of microstrip line 2 as electric pulse, actually can be recorded the characteristic impedance Zmcp of microstrip line 2 by TDR impedance instrument.Electric pulse inputs from input connector 3, and it is Zmcp that the characteristic impedance of input connector 3 is chosen equally; Be be transferred to microstrip line 2 after the cable 4 be connected with input connector of Zmcp by characteristic impedance, be that the cable 5 that Zmcp is connected with output connector continues to transfer to output connector 6 place that characteristic impedance is Zmcp along characteristic impedance again, whole transmitting procedure no resistance change, therefore areflexia when electric pulse transmits over the whole system, the final uniformity gain obtaining framing camera.
MCP microstrip line 2 can be connected with input connector 3 and output connector 6 respectively by single or multi-cable.
See Fig. 2, when cable is many, be parallel with one another between multi-cable; Meanwhile, when cable is many, the quantity of input connector 3 or the coupled respectively cable of output connector 6 is corresponding.The impedance of input is Z
mCPconnector and impedance be Z
mCPcable be connected, cable is connected with MCP microstrip line again, and microstrip line is Z with impedance again
mCPcable be connected, cable and output impedance are Z
mCPconnector be connected.
The characteristic impedance of MCP microstrip line is obtained by the actual measurement of TDR impedance instrument.
Claims (5)
1. an electric pulse transmission system, is characterized in that: described electric pulse transmission system comprises input connector, cable, MCP microstrip line and output connector; MCP microstrip line is connected with input connector and output connector respectively by cable; The characteristic impedance of the described characteristic impedance of input connector, the characteristic impedance of cable and output connector is identical with the characteristic impedance of MCP microstrip line respectively.
2. electric pulse transmission system according to claim 1, is characterized in that: described MCP microstrip line is connected with input connector and output connector respectively by single or multi-cable.
3. electric pulse transmission system according to claim 2, it is characterized in that: when described cable is many, described multi-cable is parallel with one another.
4. electric pulse transmission system according to claim 3, is characterized in that: when described cable is many, and the quantity of described input connector or the coupled respectively cable of output connector is corresponding.
5. the electric pulse transmission system according to claim 1 or 2 or 3 or 4, is characterized in that: the characteristic impedance of described MCP microstrip line is obtained by the actual measurement of TDR impedance instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471571.3A CN104270170B (en) | 2014-09-16 | Electric pulse transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410471571.3A CN104270170B (en) | 2014-09-16 | Electric pulse transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104270170A true CN104270170A (en) | 2015-01-07 |
| CN104270170B CN104270170B (en) | 2017-01-04 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11283707A (en) * | 1998-03-27 | 1999-10-15 | Nec Eng Ltd | Connector device for microstrip |
| CN2456373Y (en) * | 2000-12-13 | 2001-10-24 | 中国科学院西安光学精密机械研究所 | Super-quick pulse generator with program random shaping |
| JP2003208949A (en) * | 2002-01-10 | 2003-07-25 | Hitachi Kokusai Electric Inc | Mounting structure of connector for connecting coaxial cable |
| CN2773749Y (en) * | 2005-07-26 | 2006-04-19 | 中国科学院西安光学精密机械研究所 | Travelling gated framing camera of x-ray micro-channel panel |
| CN101672874A (en) * | 2009-09-23 | 2010-03-17 | 深圳市博敏电子有限公司 | Microstrip transmission line impedance parameter test method |
| CN103077874A (en) * | 2011-10-25 | 2013-05-01 | 中国科学院西安光学精密机械研究所 | Grid-control X-ray source and spatial X-ray communication system and method |
| CN103197217A (en) * | 2013-04-15 | 2013-07-10 | 哈尔滨理工大学 | Ultrahigh frequency sensor for cable partial discharge online monitoring |
| CN204231340U (en) * | 2014-09-16 | 2015-03-25 | 中国科学院西安光学精密机械研究所 | Electric pulse transmission system |
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11283707A (en) * | 1998-03-27 | 1999-10-15 | Nec Eng Ltd | Connector device for microstrip |
| CN2456373Y (en) * | 2000-12-13 | 2001-10-24 | 中国科学院西安光学精密机械研究所 | Super-quick pulse generator with program random shaping |
| JP2003208949A (en) * | 2002-01-10 | 2003-07-25 | Hitachi Kokusai Electric Inc | Mounting structure of connector for connecting coaxial cable |
| CN2773749Y (en) * | 2005-07-26 | 2006-04-19 | 中国科学院西安光学精密机械研究所 | Travelling gated framing camera of x-ray micro-channel panel |
| CN101672874A (en) * | 2009-09-23 | 2010-03-17 | 深圳市博敏电子有限公司 | Microstrip transmission line impedance parameter test method |
| CN103077874A (en) * | 2011-10-25 | 2013-05-01 | 中国科学院西安光学精密机械研究所 | Grid-control X-ray source and spatial X-ray communication system and method |
| CN103197217A (en) * | 2013-04-15 | 2013-07-10 | 哈尔滨理工大学 | Ultrahigh frequency sensor for cable partial discharge online monitoring |
| CN204231340U (en) * | 2014-09-16 | 2015-03-25 | 中国科学院西安光学精密机械研究所 | Electric pulse transmission system |
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Granted publication date: 20170104 Termination date: 20180916 |