CN202261239U - Microwave cavity used for passive rubidium atom frequency marker - Google Patents
Microwave cavity used for passive rubidium atom frequency marker Download PDFInfo
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- CN202261239U CN202261239U CN2011203405641U CN201120340564U CN202261239U CN 202261239 U CN202261239 U CN 202261239U CN 2011203405641 U CN2011203405641 U CN 2011203405641U CN 201120340564 U CN201120340564 U CN 201120340564U CN 202261239 U CN202261239 U CN 202261239U
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- arc shaped
- shaped blade
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Abstract
The utility model discloses a microwave cavity used for a passive rubidium atom frequency maker, comprising a cavity cover A (2), a cavity cover B (3), an adjusting piston (4), and a cavity C (8), wherein the cavity C (8) comprises an arc blade (6), a supporting column (5), a cavity wall (1), and a coupling ring mounting hole (7), the cavity body (8) is a hollow cylinder through from top to bottom, the supporting column (5) and the cavity wall (1) are integrally machined and formed, and both sides of the supporting column (5) are respectively provided with a concave semicircle. The circular profile of the microwave cavity enables the uniformity of the internal magnetic field of the microwave cavity to be increased, the microwave cavity to be easily matched with a magnetic shielding layer, and the magnetic shielding coefficient of the whole microwave cavity to be increased; and the concave supporting column (5) enables the Q value of the microwave cavity to be greatly increased.
Description
Technical field
The utility model relates to a kind of microwave cavity, particularly a kind of microwave cavity that is used for inactive type rubidium atom frequency scale.
Background technology
Rb atom frequency marking has the advantage that volume is little, in light weight and cost is low, by application widely and satellite navigation, physical measurement, aviation and field such as communicate by letter.Rb atom frequency marking is divided into physical piece and circuit part, and physical piece is the core devices of complete machine, and its performance is determining the frequency stability of Rb atom frequency marking.Microwave cavity provides the place of microwave radiation field and the meticulous energy level transition of rubidium atom as the vitals of physical piece, makes the rubidium atom produce the transition of high level to low-lying level.
The operational mode that present Rb atom frequency marking uses is TE
011Mould or TE
111The cylindrical microwave chamber of mould, shaped grooved magnetron and wedge shape pillar microwave magnetron chamber.Plain cylindrical form TE
011Mould microwave cavity Q value is bigger, and axial magnetic field distributes comparatively even, but volume is bigger.TE
111Mould microwave cavity volume is less, but the Q value is also smaller, and axial Distribution of Magnetic Field is not as TE
011The mould microwave cavity is even.Shaped grooved magnetron cavity has smaller volume and Q value but mechanical stability is good not as wedge shape pillar microwave magnetron chamber, but the latter's Q value will be lower than the former.Though the rectangle microwave chamber also can be used for Rb atom frequency marking, because the cross section of its rectangle has proposed higher requirement to the performance of C field and magnetic shielding system.
The utility model content
The purpose of the utility model is to provide a kind of inactive type rubidium atom frequency scale to use microwave cavity, solves TE
011Problem, TE that mould microwave cavity volume is excessive
111Little and the uneven problem of Distribution of Magnetic Field of mould microwave cavity Q value.
A kind of Rb atom frequency marking is used microwave cavity, comprising: chamber lid A, chamber lid B, regulating piston also comprise: cavity C.Wherein, cavity C comprises: arc shaped blade, pillar, chamber wall, coupling loop installing hole.
Cavity C is that the hollow out of up/down perforation is cylindrical, chamber lid A, chamber lid B respectively with cavity C screw.Arc shaped blade, pillar and chamber wall are that one shapes, and the pillar both sides are semicircle for depression, and four pillars are evenly distributed on the cavity C, and pillar places in the middle of the wall of chamber, and pillar places the arc shaped blade center.There is screwed hole at lid A center, chamber, and chamber lid A and regulating piston screw thread are fixed.On regulating piston, have through hole, on the lid B of chamber, have through hole.The outer radius of cavity C is 20%～60% of a cavity C height, and the thickness of chamber wall is 10%～40% of cavity C outer radius.The height of arc shaped blade is 30%～90% of a cavity C height, and the outer radius of arc shaped blade is 20%～80% of a cavity C outer radius, and arc shaped blade thickness is 2%～20% of arc shaped blade outer radius.Pillar is 8 to the subtended angle at cavity C center
o～70
o, arc shaped blade is 30 to the subtended angle in the center of circle
o～89
o, the height of pillar is 10%～80% of a cavity C height, the height of pillar is less than the height of arc shaped blade.The outer surface of chamber lid A, chamber lid B, cavity C and regulating piston is all silver-plated or gold-plated.
During use; Through the regulating piston on the lid A of chamber is rotated and can tentatively regulates the frequency of microwave cavity; Meticulous adjusting is regulated through the temperature coefficient that last heater strip that twines of cavity C or heating plate utilize microwave cavity; The rubidium lamp carries out pumping through the through hole of regulating piston to passive rubidium bubble, and transmitted light passes through the through hole of chamber lid B by the photo-detector collection.Microwave signal is through coupling loop or coupling probe feed-in microwave cavity; The intracavitary irradiation field is the vibration of standing wave form; Formation has the electromagnetic field of suitable Rb atom frequency marking frequency and mode profile; High level atom in this microwave electromagnetic field excitation Rb atom frequency marking is to the low-lying level transition, and the light signal strength that photo-detector is detected weakens, and presents the curve of depression.Convert light signal into the signal of telecommunication through photodetector, circuit part forms stable output with the frequency of crystal oscillator at this signal of telecommunication.
A kind of microwave cavity that is used for inactive type rubidium atom frequency scale has the advantage that volume is little, the Q value high, axial magnetic field is evenly distributed, mechanical stability is strong.Because the microwave cavity outside is circular, the uniformity of its internal magnetic field is improved, and is easy to cooperate with magnetic masking layer, improves the magnetic screen coefficient of complete machine.Female stanchion then makes the Q value of microwave cavity obtain bigger lifting.The Rb atom frequency marking complete machine performance of equipping this microwave cavity can access bigger raising.Its ability performance is better than the microwave magnetron chamber of wedge shape pillar, and is higher than the mechanical stability in shaped grooved microwave magnetron chamber.
Description of drawings
A kind of microwave cavity axial section sketch map that is used for inactive type rubidium atom frequency scale of Fig. 1;
A kind of cross sectional representation that is used for the microwave cavity cavity C of inactive type rubidium atom frequency scale of Fig. 2.
1. B 4. regulating pistons 5. pillars 6. arc shaped blades are covered in chamber wall 2. chambeies lid A 3. chambeies
7. coupling loop installing hole 8. cavity C.
Embodiment
A kind of Rb atom frequency marking is used microwave cavity, comprising: chamber lid A2, chamber lid B3, regulating piston 4 also comprise: cavity C8.Wherein, cavity C8 comprises: arc shaped blade 6, pillar 5, chamber wall 1, coupling loop installing hole 7.
Cavity C8 is that the hollow out of up/down perforation is cylindrical, chamber lid A2, chamber lid B3 respectively with cavity C8 screw.Arc shaped blade 6, pillar 5 and chamber wall 1 are for one shapes, and pillar 5 both sides are semicircle for depression, and four pillars 5 are evenly distributed on the cavity C8, and pillar 5 places in the middle of the chamber wall 1, and pillar 5 places arc shaped blade 6 centers.There is screwed hole at lid A2 center, chamber, and chamber lid A2 and regulating piston 4 screw threads are fixed.On regulating piston 4, have through hole, on the lid B3 of chamber, have through hole.Cavity C8 highly is 30mm, and the outer radius of cavity C8 is 19mm, and the thickness of chamber wall 1 is 2mm.The height of arc shaped blade 6 is 25mm, and the outer radius of arc shaped blade 6 is 15mm, and arc shaped blade 6 thickness are 1mm.The subtended angle at 5 couples of cavity C8 of pillar center is 18
o, the subtended angle in 6 pairs of centers of circle of arc shaped blade is 66.5
o, the height of pillar 5 is 15mm.The outer surface of chamber lid A2, chamber lid B3, cavity C8 and regulating piston 4 is all silver-plated or gold-plated.
During use; Through the regulating piston 4 on the lid A2 of chamber is rotated and can tentatively regulates the frequency of microwave cavity; Meticulous adjusting is regulated through the temperature coefficient that last heater strip that twines of cavity C8 or heating plate utilize microwave cavity; The rubidium lamp carries out pumping through the through hole of regulating piston 4 to passive rubidium bubble, and transmitted light passes through the through hole of chamber lid B3 by the photo-detector collection.Microwave signal is through coupling loop or coupling probe feed-in microwave cavity; The intracavitary irradiation field is the vibration of standing wave form; Formation has the electromagnetic field of suitable Rb atom frequency marking frequency and mode profile; High level atom in this microwave electromagnetic field excitation Rb atom frequency marking is to the low-lying level transition, and the light signal strength that photo-detector is detected weakens, and presents the curve of depression.Convert light signal into the signal of telecommunication through photodetector, circuit part forms stable output with the frequency of crystal oscillator at this signal of telecommunication.
Claims (1)
1. microwave cavity that is used for inactive type rubidium atom frequency scale comprises: chamber lid A (2), chamber lid B (3), regulating piston (4) is characterized in that also comprising: cavity C (8); Wherein, cavity C (8) comprising: arc shaped blade (6), pillar (5), chamber wall (1), coupling loop installing hole (7);
Cavity C (8) is that the hollow out of up/down perforation is cylindrical, chamber lid A (2), chamber lid B (3) respectively with cavity C (8) screw; Arc shaped blade (6), pillar (5) and chamber wall (1) are for one shapes, and pillar (5) both sides are semicircle for depression, and four pillars (5) are evenly distributed on the cavity C (8), and pillar (5) places in the middle of the chamber wall (1), and pillar (5) places arc shaped blade (6) center; There is screwed hole at lid A (2) center, chamber, and chamber lid A (2) fixes with regulating piston (4) screw thread; On regulating piston (4), have through hole, on chamber lid B (3), have through hole; The outer radius of cavity C (8) is 20%～60% of cavity C (a 8) height, and the thickness of chamber wall (1) is 10%～40% of cavity C (8) outer radius; The height of arc shaped blade (6) is 30%～90% of cavity C (a 8) height, and the outer radius of arc shaped blade (6) is 20%～80% of cavity C (a 8) outer radius, and arc shaped blade (6) thickness is 2%～20% of arc shaped blade (6) outer radius; Pillar (5) is 8 °～70 ° to the subtended angle at cavity C (8) center, and arc shaped blade (6) is 30 °～89 ° to the subtended angle in the center of circle, and the height of pillar (5) is 10%～80% of cavity C (a 8) height, and the height of pillar (5) is less than the height of arc shaped blade (6); The outer surface of chamber lid A (2), chamber lid B (3), cavity C (8) and regulating piston (4) is all silver-plated or gold-plated;
During use; Through the regulating piston (4) on the chamber lid A (2) is rotated and can tentatively regulates the frequency of microwave cavity; Meticulous adjusting is regulated through the temperature coefficient that last heater strip that twines of cavity C (8) or heating plate utilize microwave cavity; The rubidium lamp carries out pumping through the through hole of regulating piston (4) to passive rubidium bubble, and transmitted light passes through the through hole of chamber lid B (3) by the photo-detector collection; Microwave signal is through coupling loop or coupling probe feed-in microwave cavity; The intracavitary irradiation field is the vibration of standing wave form; Formation has the electromagnetic field of suitable Rb atom frequency marking frequency and mode profile; High level atom in this microwave electromagnetic field excitation Rb atom frequency marking is to the low-lying level transition, and the light signal strength that photo-detector is detected weakens, and presents the curve of depression; Convert light signal into the signal of telecommunication through photodetector, circuit part forms stable output with the frequency of crystal oscillator at this signal of telecommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203405641U CN202261239U (en) | 2011-09-13 | 2011-09-13 | Microwave cavity used for passive rubidium atom frequency marker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203405641U CN202261239U (en) | 2011-09-13 | 2011-09-13 | Microwave cavity used for passive rubidium atom frequency marker |
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| Publication Number | Publication Date |
|---|---|
| CN202261239U true CN202261239U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203405641U Expired - Fee Related CN202261239U (en) | 2011-09-13 | 2011-09-13 | Microwave cavity used for passive rubidium atom frequency marker |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018764A (en) * | 2012-12-17 | 2013-04-03 | 江汉大学 | Population inversion quantity evaluation system based on energy level translation and control method of population inversion quantity evaluation system |
| CN103048917A (en) * | 2012-12-21 | 2013-04-17 | 成都天奥电子股份有限公司 | Cylindrical waveguide microwave cavity for rubidium clock |
| CN108227465A (en) * | 2017-12-21 | 2018-06-29 | 中国科学院国家授时中心 | A kind of pulse laser pumping rubidium clock physical system of low temperature sensibility |
| CN108667454A (en) * | 2018-04-17 | 2018-10-16 | 中国科学院国家授时中心 | A kind of high evenness low-temperature coefficient cavity bubble system |
| CN112864566A (en) * | 2021-01-05 | 2021-05-28 | 中国科学院精密测量科学与技术创新研究院 | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide |
| CN115483521A (en) * | 2022-09-22 | 2022-12-16 | 杭州电子科技大学 | Subminiature TE011 atomic frequency standard magnetic control tube cavity and implementation method thereof |
-
2011
- 2011-09-13 CN CN2011203405641U patent/CN202261239U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018764A (en) * | 2012-12-17 | 2013-04-03 | 江汉大学 | Population inversion quantity evaluation system based on energy level translation and control method of population inversion quantity evaluation system |
| CN103048917A (en) * | 2012-12-21 | 2013-04-17 | 成都天奥电子股份有限公司 | Cylindrical waveguide microwave cavity for rubidium clock |
| CN103048917B (en) * | 2012-12-21 | 2015-08-05 | 成都天奥电子股份有限公司 | For the cylindrical waveguide microwave cavity of rubidium clock |
| CN108227465A (en) * | 2017-12-21 | 2018-06-29 | 中国科学院国家授时中心 | A kind of pulse laser pumping rubidium clock physical system of low temperature sensibility |
| CN108227465B (en) * | 2017-12-21 | 2019-10-18 | 中国科学院国家授时中心 | A kind of pulse laser pumping rubidium clock physical system of low temperature sensibility |
| CN108667454A (en) * | 2018-04-17 | 2018-10-16 | 中国科学院国家授时中心 | A kind of high evenness low-temperature coefficient cavity bubble system |
| CN108667454B (en) * | 2018-04-17 | 2021-10-22 | 中国科学院国家授时中心 | High-uniformity low-temperature-coefficient cavity bubble system |
| CN112864566A (en) * | 2021-01-05 | 2021-05-28 | 中国科学院精密测量科学与技术创新研究院 | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide |
| CN112864566B (en) * | 2021-01-05 | 2022-05-13 | 中国科学院精密测量科学与技术创新研究院 | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide |
| CN115483521A (en) * | 2022-09-22 | 2022-12-16 | 杭州电子科技大学 | Subminiature TE011 atomic frequency standard magnetic control tube cavity and implementation method thereof |
| CN115483521B (en) * | 2022-09-22 | 2024-02-06 | 杭州电子科技大学 | Microminiature TE 011-like atomic frequency standard magnetron cavity and implementation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150913 |
|
| EXPY | Termination of patent right or utility model |