CN204118228U - Waveguide termination - Google Patents
Waveguide termination Download PDFInfo
- Publication number
- CN204118228U CN204118228U CN201420393390.9U CN201420393390U CN204118228U CN 204118228 U CN204118228 U CN 204118228U CN 201420393390 U CN201420393390 U CN 201420393390U CN 204118228 U CN204118228 U CN 204118228U
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- Prior art keywords
- waveguide
- electromagnetic wave
- cavity
- wave signal
- waveguide termination
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- 238000004891 communication Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 230000008054 signal transmission Effects 0.000 description 3
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- PLAIAIKZKCZEQF-UHFFFAOYSA-N methyl 6-chloro-2-oxo-3h-1,2$l^{4},3-benzodithiazole-4-carboxylate Chemical compound COC(=O)C1=CC(Cl)=CC2=C1NS(=O)S2 PLAIAIKZKCZEQF-UHFFFAOYSA-N 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model provide a kind of can with the crack waveguide tube at least with two pipelines with the use of waveguide termination.The utility model provides a kind of waveguide termination, it is characterized in that, have: waveguide, for transmitting electromagnetic wave signal, at least comprising two cavitys be arranged in parallel and being used for transmitting as the first cavity and the second cavity the two class electromagnetic wave signals that frequency interval each other cannot reach predetermined isolated requirement; At least two wave-absorbers, are separately positioned on the inside of each cavity, for absorbing most electromagnetic wave signal; And metal cover board, the one end being arranged on described waveguide for stop electromagnetic wave signal through, wherein, the other end of waveguide is provided with opening, and is connected with other electromagnetic wave elements as link, is provided with demarcation strip between the first cavity and the second cavity.
Description
Technical field
The utility model relates to a kind of waveguide termination.
Background technology
Now, reliability and fail safe and transmission range are being required that in higher wireless communication system, such as, in urban track traffic wireless telecommunication system, slotted waveguide antenna is widely used.Slotted waveguide antenna can enable to transmit in the waveguide from the Multi-path electricity magnetostatic wave signal of the multiloop loop systems such as the train automatic controlling system based on radio communication (CBTC) in urban track traffic wireless communication technology system, Customer information display system (PIDS), rail transportation vehicle-mounted video monitoring system (vehicle-mounted CCTV system), vehicle-mounted mobile TV system simultaneously.
But, in these systems above-mentioned, due to the roll-off characteristic (any filter can not be all desirable step-like manner) of the filter of electromagnetic signals, electromagnetic wave signal is caused always to there is certain out-of-band radiation, namely our usually alleged transmit scattering.Interference is mutually produced when the existence of transmit scattering can make the narrow multiple signals of isolate bands each other transmit in the waveguide.
In order to avoid producing such interference, just the isolation between these signals must be increased to meet insulation request, normally adopt RF module to increase isolation, carry out conjunction road, again by Signal transmissions to waveguide, finally by the terminate load being arranged on terminal, signal is all absorbed.Such as, in urban track traffic wireless telecommunication system, it is generally 100dB that isolation of system requires, between signal, the isolate bands of script is 50dB, the isolate bands that RF module can increase is 50dB, and therefore, signal is after RF module, isolate bands can reach 100dB, thus reaches insulation request.
But along with the development of communication, the signal transmitted in each system is on the increase, and the isolate bands between signal is also more and more narrow, even if cause have employed RF module, the isolation between signal is also difficult to meet the demands.Such signal is transmitted by a set of slotted waveguide antenna, cannot communication need be met at all.
In this case, just need about 100 meters, interval to lay a set of radiating guide in addition again, the signal that cannot reach insulation request transmits respectively by two cover radiating guides.But do like this and not only expend equipment, and need to arrange laying space separately, particularly in track traffic, the laying space in tunnel is natively quite compact, and unnecessary laying space cannot be found to lay the second cover radiating guide at all.
In order to solve such problem, human hair is had to understand a kind of crack waveguide tube, as shown in Figure 5, this crack waveguide tube 15 at least has two pipelines 16 and 17 be arranged in parallel, separate with demarcation strip 18 between two pipelines, these two pipelines transmit the two class electromagnetic wave signals that frequency interval each other cannot reach predetermined isolated requirement respectively.
But, existing waveguide termination all cannot with the crack waveguide tube 15 of this structure with the use of, therefore, be badly in need of invention a kind of new waveguide termination.
Utility model content
The utility model have employed following structure to solve above-mentioned problem.
The utility model provides a kind of waveguide termination, it is characterized in that, have: waveguide, for transmitting electromagnetic wave signal, at least comprising two cavitys be arranged in parallel and being used for transmitting as the first cavity and the second cavity the two class electromagnetic wave signals that frequency interval each other cannot reach predetermined isolated requirement; At least two wave-absorbers, are separately positioned on the inside of each cavity, for absorbing most electromagnetic wave signal; And metal cover board, the one end being arranged on described waveguide for stop electromagnetic wave signal through, wherein, the other end of waveguide is provided with opening, and is connected with other electromagnetic wave elements as link, is provided with demarcation strip between the first cavity and the second cavity.
In addition, the waveguide termination that the utility model provides can also have such feature: the rims of waveguide is provided with flange, is connected for sealing with other electromagnetic wave elements.
In addition, the waveguide termination that the utility model provides can also have such feature: wave-absorber is arranged on the strongest position of waveguide internal electric field.
In addition, the waveguide termination that the utility model provides can also have such feature: wherein, and wave-absorber at least absorbs the electromagnetic wave signal of 99.8%.
In addition, the waveguide termination that the utility model provides can also have such feature: wave-absorber is tiltedly the split type thin plate identical with the length of waveguide, this tiltedly splits type thin plate towards the inclination angle of the side, direction of opening is 5 ° ~ 30 °, and the side, direction back to opening is right angle.
In addition, the waveguide termination that the utility model provides can also have such feature: other electromagnetic wave elements are the crack waveguide tube with the first pipeline and the second pipe be arranged in parallel, and the first pipeline is connected with the second cavity with the first cavity by described link with second pipe.
In addition, the waveguide termination that the utility model provides can also have such feature: metal cover board is tightly connected by screw and marine glue and described waveguide.
Utility model effect
According to waveguide termination of the present utility model, because waveguide at least comprises two the first cavitys and the second cavity that be arranged in parallel, can be respectively used to transmit the two class electromagnetic wave signals that frequency interval each other cannot reach predetermined isolated requirement, and the other end of waveguide is provided with opening can be connected with other electromagnetic wave elements as link, therefore, waveguide termination of the present utility model can with the crack waveguide tube at least with two pipelines with the use of, realize Signal transmissions.
Accompanying drawing explanation
Fig. 1 is that the utility model waveguide termination is in an embodiment from the structural representation viewed from front;
Fig. 2 is that the utility model waveguide termination is in an embodiment from the structural representation viewed from the back side;
Fig. 3 is the exploded view of the utility model waveguide termination in an embodiment;
Fig. 4 is the structural representation of the continuous transmission system of the utility model signal in an embodiment; And
Fig. 5 is the structural representation of crack waveguide tube.
Embodiment
Describe the waveguide termination related in detail below in conjunction with the drawings and specific embodiments, but protection range of the present utility model is not limited to following execution mode.
< embodiment >
As shown in figures 1-4, twin-guide terminate load 10 is installed in the end of crack waveguide tube 15, as terminal, absorbs crack waveguide tube 15 and transmits whole electromagnetic wave signals of coming.It has twin-guide ring flange 10a, two absorbing cavity 10b, demarcation strip 10c, two absorbing material body 10d and metal cover board 10e.
Twin-guide terminate load 10 is fixedly connected on the end of the crack waveguide tube 15 of slotted waveguide antenna 14 by twin-guide ring flange 10a, twin-guide ring flange 10a and crack waveguide tube 15 adopt welding manner to be fixedly linked.
Two absorbing cavity 10b are communicated with the first pipeline 16 is as shown in Figure 5 corresponding with second pipe 17 with the second absorbing cavity 10b-2 respectively as the first absorbing cavity 10b-1, respectively to frequency interval each other cannot reach A, B that predetermined isolated requires two class electromagnetic wave signal transmit.
Demarcation strip 10c, between the first absorbing cavity 10b-1 and the second absorbing cavity 10b-2, plays buffer action.
In the present embodiment one, two absorbing cavity 10b and demarcation strip 10c form a double wave conduit.
Two absorbing material body 10d are separately positioned on the precalculated position of the first absorbing cavity 10b-1 and the second absorbing cavity 10b-2 inside, can absorb the electromagnetic wave signal being greater than 99.8%.
As shown in figures 1 and 3, absorbing material body 10d is identical with the length of double wave conduit, and shape is type of tiltedly the splitting thin plate at two-way inclination angle, and before opening b1 direction, tiltedly split inclination angle is 5 ° ~ 30 °, retreads that to split inclination angle be 90 ° towards opening b2 direction.The b1 of absorbing material body 10d holds the length of splitter longer, and the assimilation effect of electromagnetic wave signal energy is better, and the performance of coupling is better, and the splitter length in the opening b1 direction of absorbing material body 10d generally gets the integral multiple of λ/2.Absorbing material body 10d is placed on the most strength of electric field in absorbing cavity 10b abreast, and absorbing material body 10d strong absorption microwave energy under electric field action, makes it reflect and diminish.Absorbing material body 10d adopts carbonyl iron dust and epoxy resin to carry out being molded into material, or the wedge shape cavernous body containing carbon dust.
Metal cover board 10e is arranged on one end of the first absorbing cavity 10b-1 and the second absorbing cavity 10b-2 by sealing, for stop electromagnetic wave signal through, thus realize the whole absorptions to electromagnetic wave signal.When metal cover board 10e is connected with crack waveguide tube 15 with screw, can marine glue be used, waterproof and dustproof effect can be played.
As shown in Figure 4, in the signal transmitting apparatus 12 of the continuous transmission system 11 of signal, see from left to right, twin-guide terminate load 10 is installed in the left part of the crack waveguide tube 15 of the high order end being positioned at first and second launch and accept unit 13, and on the left part of crack waveguide tube 15 being positioned at the 3rd launch and accept unit 13 high order end and low order end and right part.This twin-guide terminate load 10, as terminal, all absorbs the electromagnetic wave signal of crack waveguide tube transmission.
The effect of embodiment and effect
According to the waveguide termination of the present embodiment, because waveguide at least comprises two the first cavitys and the second cavity that be arranged in parallel, frequency interval each other can be respectively used to transmit and A, B two class electromagnetic wave signal that predetermined isolated requires cannot be reached, and the other end of waveguide is provided with opening can be connected with crack waveguide tube as link, therefore, waveguide termination of the present utility model can with the crack waveguide tube at least with two pipelines with the use of, realize Signal transmissions.
Certainly, the waveguide termination involved by the utility model is not merely defined in structure described in the present embodiment.
When needing to coordinate the crack waveguide tube with the pipeline of more than three to use, as waveguide termination of the present utility model, the cavity of more than three can also be had, and the wave-absorber of more than three.
Claims (8)
1. a waveguide termination, is characterized in that, has:
Waveguide, for transmitting electromagnetic wave signal, at least comprising two cavitys be arranged in parallel and being used for transmitting as the first cavity and the second cavity the two class electromagnetic wave signals that frequency interval each other cannot reach predetermined isolated requirement;
At least two wave-absorbers, are separately positioned on the inside of cavity described in each, for absorbing most described electromagnetic wave signal; And
Metal cover board, the one end being arranged on described waveguide for stop described electromagnetic wave signal through,
Wherein, the other end of described waveguide is provided with opening, and is connected with other electromagnetic wave elements as link,
Demarcation strip is provided with between each described cavity.
2. waveguide termination according to claim 1, is characterized in that:
Wherein, the described rims of described waveguide is provided with flange, is connected for sealing with other electromagnetic wave elements described.
3. waveguide termination according to claim 2, is characterized in that:
Wherein, described wave-absorber is arranged on the strongest position of described waveguide internal electric field.
4. waveguide termination according to claim 3, is characterized in that:
Wherein, described wave-absorber at least absorbs the electromagnetic wave signal of 99.8%.
5. the waveguide termination according to claim 3 or 4, is characterized in that:
Wherein, described wave-absorber is tiltedly the split type thin plate identical with the length of described waveguide, and this tiltedly splits type thin plate towards the inclination angle of the side, direction of described opening is 5 ° ~ 30 °, and the side, direction back to described opening is right angle.
6., according to the waveguide termination in Claims 1 to 4 described in any one, it is characterized in that:
Wherein, other electromagnetic wave elements described are the crack waveguide tube with the first pipeline and the second pipe be arranged in parallel, and described first pipeline is connected with described second cavity with described first cavity by described link with described second pipe.
7. waveguide termination according to claim 5, is characterized in that:
Wherein, other electromagnetic wave elements described are the crack waveguide tube with the first pipeline and the second pipe be arranged in parallel, and described first pipeline is connected with described second cavity with described first cavity by described link with described second pipe.
8. waveguide termination according to claim 1, is characterized in that:
Wherein, described metal cover board is tightly connected by screw and marine glue and described waveguide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393390.9U CN204118228U (en) | 2014-07-16 | 2014-07-16 | Waveguide termination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420393390.9U CN204118228U (en) | 2014-07-16 | 2014-07-16 | Waveguide termination |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204118228U true CN204118228U (en) | 2015-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420393390.9U Expired - Lifetime CN204118228U (en) | 2014-07-16 | 2014-07-16 | Waveguide termination |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204118228U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428768A (en) * | 2015-12-25 | 2016-03-23 | 清华大学 | Microwave load and manufacturing method thereof |
| CN106981709A (en) * | 2017-05-12 | 2017-07-25 | 北京无线电测量研究所 | A kind of large power waveguide load based on electromagnetism Meta Materials |
| CN110137648A (en) * | 2019-06-10 | 2019-08-16 | 北京无线电测量研究所 | A kind of microwave pad |
| CN115863948A (en) * | 2022-09-20 | 2023-03-28 | 北京星英联微波科技有限责任公司 | Compact type coupler |
| RU224930U1 (en) * | 2023-12-25 | 2024-04-09 | Акционерное общество "Научно-исследовательский институт Приборостроения имени В.В. Тихомирова" | Waveguide load |
-
2014
- 2014-07-16 CN CN201420393390.9U patent/CN204118228U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428768A (en) * | 2015-12-25 | 2016-03-23 | 清华大学 | Microwave load and manufacturing method thereof |
| CN106981709A (en) * | 2017-05-12 | 2017-07-25 | 北京无线电测量研究所 | A kind of large power waveguide load based on electromagnetism Meta Materials |
| CN110137648A (en) * | 2019-06-10 | 2019-08-16 | 北京无线电测量研究所 | A kind of microwave pad |
| CN110137648B (en) * | 2019-06-10 | 2021-07-27 | 北京无线电测量研究所 | Microwave load |
| CN115863948A (en) * | 2022-09-20 | 2023-03-28 | 北京星英联微波科技有限责任公司 | Compact type coupler |
| CN115863948B (en) * | 2022-09-20 | 2023-09-12 | 北京星英联微波科技有限责任公司 | Compact die coupler |
| RU224930U1 (en) * | 2023-12-25 | 2024-04-09 | Акционерное общество "Научно-исследовательский институт Приборостроения имени В.В. Тихомирова" | Waveguide load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 201802 Shanghai, Jiading District silver Xiang Road, room 655, No. 1309 Patentee after: CETC SHANGHAI MICROWAVE COMMUNICATION CO.,LTD. Address before: 201802 Shanghai City, Jiading District Nanxiang Town, Shanghai Yi Road No. 185 building 4 Patentee before: CETC MICROWAVE COMMUNICATION (SHANGHAI) CO.,LTD. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150121 |