CN204424412U - Heavy caliber low-loss microwave vacuum window - Google Patents
Heavy caliber low-loss microwave vacuum window Download PDFInfo
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- CN204424412U CN204424412U CN201520090696.1U CN201520090696U CN204424412U CN 204424412 U CN204424412 U CN 204424412U CN 201520090696 U CN201520090696 U CN 201520090696U CN 204424412 U CN204424412 U CN 204424412U
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Abstract
The utility model provides a kind of heavy caliber low-loss microwave vacuum window, this microwave vacuum window is connected by mounting flange group, as the microwave signal input port of low-temperature receiver, described microwave vacuum window comprises sealing film, sealing film outer side edges is fixedly clamped by clamp flange group, sealing film lower end is provided with the supporting structure adopting electromagnetic wave transparent material to make, and this supporting structure is connected with described mounting flange group, and described clamp flange group is fixedly connected with mounting flange group.The utility model heavy caliber low-loss microwave vacuum window is the technology integrating microwave, vacuum, refrigeration, material, be the input port of broadband feed coolant receiver, there is large, the low lossy microwave of input port area, high strength, high resistance to compression and vacuum-packed advantage.
Description
Technical field
The utility model relates to a kind of microwave signal input window for low-temperature receiver system, is specifically related to a kind of heavy caliber low-loss microwave vacuum window.
Background technology
Low-temperature receiver allows low temperature low noise amplifier be operated in 20K(-253 DEG C) under environment, owing to having extremely low noise temperature (only having 1/9 of regular receiver), more and more come into one's own in the reception of small-signal.Adopt low-temperature receiver can improve the sensitivity of system significantly, the G/T value of elevator system is one of preferred option of the current and following receiving system.In order to improve the sensitivity of whole receiving system, the amplifier of normal temperature cannot reach lower noise requirements, therefore adopts low temperature low noise amplifier, can improve the receiving sensitivity of whole antenna system greatly.In order to improve the performance index of system further, need feed integrally cooling in broadband receiving system, feed is flared structure, it does not possess sealing function, vacuum chamber is for cryogenic device provides the environment of a vacuum, thus ensure that the working temperature of cryogenic device reaches below 20K, the diameter of the Feed Horn mouth of different frequency is different, the size of feed determines the size of vacuum chamber, if input window blow-by, then cannot meet the requirement of refrigeration to vacuum, if lossy microwave is large, then can not meet low loss characteristic.Existing microwave vacuum window diameter is less than 100mm, the requirement of broadband overall feed refrigeration cannot be met, and the maximum actinal surface diameter of broadband feed has reached 330mm, existing microwave vacuum window can not meet the vacuum seal of broadband heavy caliber feed, Insertion Loss and has born the demand of pressure.
Utility model content
In order to meet Signal transmissions and the refrigeration of broadband low-temperature receiver, the utility model provides a kind of heavy caliber low-loss microwave vacuum window, can meet large area, low-loss, high strength, high resistance to compression and vacuum-packed feature.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of heavy caliber low-loss microwave vacuum window, this microwave vacuum window is connected by mounting flange group, as the microwave signal input port of low-temperature receiver, described microwave vacuum window comprises sealing film, sealing film outer side edges is fixedly clamped by clamp flange group, sealing film lower end is provided with the supporting structure adopting electromagnetic wave transparent material to make, and this supporting structure is connected with described mounting flange group, and described clamp flange group is fixedly connected with mounting flange group.
Described clamp flange group comprises fastening upper flange and fastening lower flange, by sealing ring one transition between this fastening upper flange and described sealing film.
Described supporting structure adopts rigidity electromagnetic wave transparent material to make.
Described sealing film thickness is 0.05mm ~ 0.1mm.
Described mounting flange group comprises upper flange and lower flange, and by sealing ring two transition between upper flange and described clamp flange group, lower flange is fixedly connected with the microwave signal input port of described low-temperature receiver.
From above technical scheme, the utility model heavy caliber low-loss microwave vacuum window is the technology integrating microwave, vacuum, refrigeration, material, be the input port of broadband feed coolant receiver, there is large, the low lossy microwave of input port area, high strength, high resistance to compression and vacuum-packed advantage.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model heavy caliber low-loss microwave vacuum window.
In figure: 100, microwave vacuum window, 110, sealing film, 120, clamp flange group, 121, fastening upper flange, 122, fastening lower flange, 123, sealing ring one, 130, supporting structure, 200, mounting flange group, 201, sealing ring two, 210, upper flange, 220, lower flange.
Embodiment
Below in conjunction with accompanying drawing, a kind of preferred implementation of the present utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of heavy caliber low-loss microwave vacuum window for broadband low-temperature receiver, described low-temperature receiver mainly comprises refrigeration machine 300, vacuum dewar 400 and horn feed 500, wherein the top of vacuum dewar forms the microwave signal input port for inputting microwave signal, the utility model microwave vacuum window 100 is connected with low-temperature receiver by mounting flange group 200, as microwave signal input port, refrigeration machine is arranged on the bottom of vacuum dewar, for providing the ambient temperature of 20K, described horn feed is arranged at the inside of vacuum dewar, for Received signal strength, then carry out signal by the cryogenic low noise amplifier of rear end to amplify and transmission, reach the object that sealing receives with small-signal.
Described microwave vacuum window 100 comprises sealing film 110, sealing film outer side edges is closely fixed by clamp flange group 120, sealing film lower end is provided with the supporting structure 130 adopting electromagnetic wave transparent material to make, this supporting structure is positioned at vacuum dewar, and be connected with described mounting flange group, described clamp flange group is fixedly connected with mounting flange group.
In the present embodiment, sealing film 110 is processed into thickness between 0.05mm ~ 0.1mm by special process, has high compactness, and air penetrability is less than 1.01x10-5Pa cm3/s, and in 1GHz-9GHz frequency range, its insertion loss is less than 0.05dB.
Described clamp flange group 120 comprises fastening upper flange 121 and fastening lower flange 122, and described sealing film is compressed by fastening upper flange and fastening lower flange, by sealing ring 1 transition between sealing film and fastening upper flange, and is fixed by trip bolt.
Described mounting flange group 200 comprises upper flange 210 and lower flange 220, and by sealing ring 2 201 transition between upper flange and described fastening lower flange, and fixed by trip bolt, lower flange is fixedly connected with the microwave signal input port of described low-temperature receiver.
The diameter of described sealing ring one is Φ 3.55mm, and the diameter of described sealing ring two is Φ 5.3mm, and material is has bubble-tight fluorubber, reaches the sealing effectiveness between different parts.
Described fastening upper flange, fastening lower flange, upper flange and lower flange adopt the stainless steel material of loop configuration, play support and fixed effect.
Described supporting structure 130 adopts rigidity electromagnetic wave transparent material to make, and is prepared by special process, and thickness, between 40mm-60mm, can bear the pressure of more than 1 atmospheric pressure and indeformable, and in 1GHz-9GHz frequency range, its insertion loss is less than 0.05dB.The bottom of described rigidity electromagnetic wave transparent material is arranged on lower flange, the top of rigidity electromagnetic wave transparent material is connected with sealing film, the edge of rigidity electromagnetic wave transparent material contacts with upper flange, lower flange, play and support the pressure that bears of sealing film and little to the insertion loss contribution of microwave signal, the bottom of rigidity electromagnetic wave transparent material and the distance of horn feed are between 5-10mm.
The utility model heavy caliber low-loss microwave vacuum window, is arranged on the input port of 13 meters of antenna wideband low-temperature receivers, is solved the key technology of broadband feed integrally cooling, makes the noise temperature of whole antenna receiving system have significant raising.In the present embodiment, the diameter of microwave vacuum window is 500mm, vacuum degree in vacuum chamber reaches 10-5Pa, the pressure of window carrying reaches more than 2 tons, in 1GHz ~ 9GHz frequency range, the contribution of its noise temperature is less than 10K, makes the system noise temperature of low-temperature receiver be less than 50K, significantly improve the sensitivity of system, add the G/T value of system.
The above execution mode is only be described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection range that claims of the present utility model determine.
Claims (5)
1. a heavy caliber low-loss microwave vacuum window, this microwave vacuum window (100) is connected by mounting flange group (200), as the microwave signal input port of low-temperature receiver, it is characterized in that, described microwave vacuum window comprises sealing film (110), sealing film outer side edges is fixedly clamped by clamp flange group (120), sealing film lower end is provided with the supporting structure (130) adopting electromagnetic wave transparent material to make, this supporting structure is connected with described mounting flange group, and described clamp flange group is fixedly connected with mounting flange group.
2. heavy caliber low-loss microwave vacuum window according to claim 1, it is characterized in that, described clamp flange group comprises fastening upper flange (121) and fastening lower flange (122), by sealing ring one (123) transition between this fastening upper flange and described sealing film.
3. heavy caliber low-loss microwave vacuum window according to claim 1, is characterized in that, described supporting structure (130) adopts rigidity electromagnetic wave transparent material to make.
4. heavy caliber low-loss microwave vacuum window according to claim 1, is characterized in that, described sealing film (110) thickness is 0.05mm ~ 0.1mm.
5. heavy caliber low-loss microwave vacuum window according to claim 1, it is characterized in that, described mounting flange group comprises upper flange (210) and lower flange (220), by sealing ring two (201) transition between upper flange and described clamp flange group, lower flange is fixedly connected with the microwave signal input port of described low-temperature receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520090696.1U CN204424412U (en) | 2015-02-10 | 2015-02-10 | Heavy caliber low-loss microwave vacuum window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520090696.1U CN204424412U (en) | 2015-02-10 | 2015-02-10 | Heavy caliber low-loss microwave vacuum window |
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| Publication Number | Publication Date |
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| CN204424412U true CN204424412U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520090696.1U Active CN204424412U (en) | 2015-02-10 | 2015-02-10 | Heavy caliber low-loss microwave vacuum window |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638320A (en) * | 2015-02-10 | 2015-05-20 | 中国电子科技集团公司第十六研究所 | Large-caliber low loss microwave vacuum window |
| CN108448209A (en) * | 2018-04-25 | 2018-08-24 | 中国科学院国家天文台 | A kind of multilayer polyimide film vacuum window construction for radio-frequency front-end refrigeration dewar |
-
2015
- 2015-02-10 CN CN201520090696.1U patent/CN204424412U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638320A (en) * | 2015-02-10 | 2015-05-20 | 中国电子科技集团公司第十六研究所 | Large-caliber low loss microwave vacuum window |
| CN108448209A (en) * | 2018-04-25 | 2018-08-24 | 中国科学院国家天文台 | A kind of multilayer polyimide film vacuum window construction for radio-frequency front-end refrigeration dewar |
| CN108448209B (en) * | 2018-04-25 | 2023-08-22 | 中国科学院国家天文台 | Multi-layer polyimide film vacuum window structure for radio frequency front end refrigeration Dewar |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |