CN2912015Y - Rb atom frequency-marking microwave resonant cavity - Google Patents
Rb atom frequency-marking microwave resonant cavity Download PDFInfo
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- CN2912015Y CN2912015Y CN 200620094970 CN200620094970U CN2912015Y CN 2912015 Y CN2912015 Y CN 2912015Y CN 200620094970 CN200620094970 CN 200620094970 CN 200620094970 U CN200620094970 U CN 200620094970U CN 2912015 Y CN2912015 Y CN 2912015Y
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- rubidium
- microwave
- cavity
- microwave cavity
- frequency standard
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Abstract
The utility model discloses a rubidium frequency scale microwave cavity which comprises a resonant ring, a support cylinder, a cylinder cavity, a rubidium absorbing bulb, a rubidium light filtering bulb, a heating tube, a base for the heating tube and a C field coil. The rubidium absorbing bulb and the rubidium light filtering bulb are inserted into a support tube. A dielectric ring is inserted between the support tube and the cylinder cavity. The resonant ring is inserted between the dielectric ring and the rubidium absorbing bulb. The cylinder is arranged outside the resonant connecting with the support tube by a screw. A heating triode is arranged inside the base for the heating tube which is connected with the support tube and the cylinder cavity by a screw. The utility model is simple in structure, easy to manufacture, high in the Q value of the cavity, big in the microwave filling factor and uniform in the field pattern. The utility model can be directly applied to the rubidium frequency scale.
Description
Technical field
The utility model relates to a kind of rubidium atomic frequency standard microwave cavity resonator field, more specifically relates to a kind of rubidium atomic frequency standard microwave cavity resonator, can be directly used in the Rb atom frequency marking.
Background technology
Along with the development of modern science and technology, many fields all need stable more and the precise time frequency signal, and traditional mechanical timer and crystal oscillator regularly can not be satisfied the demand.Atomic frequency standard has high stability and accuracy, so obtained utilization more and more widely.Wherein the Rb atom frequency marking volume is little, and is in light weight, and better performances is so occupied the very big market share.
Rb atom frequency marking is made of physical piece and circuit part.Physical piece has determined the main performance of Rb atom frequency marking.Physical piece is made up of the rubidium spectral lamp and the cavity bubble system that produce pumping light.Cavity bubble system comprises the microwave cavity that is used to store microwave field, the rubidium absorption dunk and the rubidium filtering blobs of storage rubidium element, the photocell of sensed light signal and C field coil etc.The rubidium atom by the pumping rayed after, make and between two hyperfine energy levels of rubidium atomic ground state population inversion take place that the population that promptly goes up energy level is higher than energy level down.When microwave frequency in being stored in microwave cavity and two energy level frequency intervals match, the microwave transition will promptly take place from last energy level transition to following energy level in the rubidium atom.When the microwave transition takes place, the light intensity signal that photocell detects will change, and be called light inspection signal.The error signal that Rb atom frequency marking utilizes this light inspection signal to produce just is locked in microwave frequency on the rubidium atomic transition spectral line, obtains standard frequency output.This shows that microwave cavity is the core component of excitation rubidium atom microwave transition, its performance is very big to the performance impact of rubidium frequency standard.
The early stage Rb atom frequency marking microwave cavity that uses mostly is the standard chamber, as the TE111 chamber, and TE011 chamber etc.The volume in this class chamber is bigger.In order to reduce volume, several non-standard chambeies have appearred.Comprise by W.Froncisz and the described annular space of JamesS.Hyde chamber (The Loop-gap resonator:A new microwave lumped circuitESR sample structure[J] .J Mag.Reson., 1982,47:515～521); By T.Sphicopoulous and the described fluting tube chamber of F.Gardiol (Slotted tube cavity:a compact resonator withempty core[J] .IEEE Proc, 1987,134 (5): 405～410); By described magnetron cavities such as H.Schweda (Atomic frequency standard[P] .US Patent:387 881,1995).The common feature in these several chambeies is all to have used a kind of LC structure, this LC structure is by constituting around microwave cavity axis and the metal pole piece that equidistantly distributes, wherein the effect of pole piece is equivalent to inductance, the effect in pole piece gap is equivalent to electric capacity, and the resonance frequency in chamber is by the geometric parameter decision of LC structure.The advantage of this class microwave cavity is that volume is little, and field mode is superior.Shortcoming is the requirement on machining accuracy height, and relatively difficulty is regulated in assembling and chamber frequently.Mei Ganghua etc. has invented a kind of fluting tube chamber (Miniatured microwave cavity for atomic frequency standard[P] .US Patent:6225870B1,2001) of new construction.The LC structure in this chamber by directly on metallic cylinder fluting realize, except the advantage that keeps several chambeies, front, also have simple in structure, handling ease, the advantage that the Q value is high.
Summary of the invention
The purpose of this utility model is to be to provide a kind of rubidium atomic frequency standard microwave cavity resonator, and this microwave cavity has simple in structure, easily processing, and the microwave field pattern is superior, and field distribution is even, and the microwave fill factor, curve factor is big, the advantage that easily transfer frequently in the chamber.It can be directly used in and make the high-performance Rb atom frequency marking.
Characteristics of the present utility model are: a kind of rubidium atomic frequency standard microwave cavity resonator, it is made of cylindrical cavity (3), dielectric ring (4), end cap (7), coupling loop (8), heating triode (11), C field coil (12), it is characterized in that rubidium filtering blobs (5) and rubidium absorption dunk (6) insert in the stay pipe (2), dielectric ring (4) inserts between stay pipe (2) and the cylindrical cavity (3), and resonant ring (1) inserts between dielectric ring (4) and the rubidium absorption dunk (6).Resonant ring (1) is circular, and is gapped between resonant ring (1) and the stay pipe (2).By resonant ring in the microwave cavity (1) and stay pipe (2), make to the utlity model has in the LC structure that microwave cavity is different in the past.Resonant ring (1) and stay pipe (2) are equivalent to inductance.Between resonant ring (1) and the stay pipe (2) certain interval is arranged, be equivalent to electric capacity.By adjusting the geometric parameter of this LC structure, make microwave cavity produce resonance in needed characteristic frequency.
Microwave is coupled in the microwave cavity by coupling loop.Induce the microwave field that around it, produces around it by resonant ring (1).As shown in Figure 2.Resonant ring (1) is circular.The microwave field that produces is similar to the TE011 pattern, and pattern is superior, helps encouraging the microwave resonance transition that absorbs rubidium atom in the bubble.By changing the height L of resonant ring (1), the microwave field field pattern that can adjust in the chamber distributes, and absorbs the interior rubidium atom of bubble with abundant excitation, thereby obtains maximum microwave resonance signal, and then improves the signal to noise ratio of system.By changing the gap W (Fig. 2) between resonant ring (1) and the stay pipe (2), can adjust the resonance frequency in the chamber easily, guarantee that microwave resonance frequency and rubidium atomic transition frequency are consistent.This microwave cavity has kept that above-mentioned several cavity volume is little, pattern is superior, Q value advantages of higher, and avoided pole piece in the above-mentioned cavity configuration to take the shortcoming of microwave distribution space, thereby have higher microwave fill factor, curve factor, and the microwave field in the microwave cavity is more evenly distributed.This structure is less demanding to each position component and machining accuracy, and assembling is simple, and institute is so that processing and manufacturing.
The utility model compared with prior art, the most significant advantage is that the microwave fill factor, curve factor is big, it is superior to have the microwave field pattern simultaneously, field pattern is even, frequently easily transfer in the chamber, simple in structure, easily machining characteristics.
Description of drawings
Fig. 1: the microwave resonance field pattern schematic diagram that produces around a kind of resonant ring
Fig. 2: the structural representation of a kind of resonant ring and stay pipe
Fig. 3: a kind of schematic diagram of rubidium atomic frequency standard microwave cavity resonator
Embodiment
According to Fig. 1, Fig. 2, Fig. 3 as can be known, the microwave cavity that is used for Rb atom frequency marking is made up of resonant ring (1), stay pipe (2), cylindrical cavity (3), dielectric ring (4), rubidium filtering blobs (5), rubidium absorption dunk (6), end cap (7), coupling loop (8), photocell (9), heating pipe holder (10), heating triode (11), C field coil (12), screw (13).End cap (7) is connected with cylindrical cavity (3) by screw (13), and screw (13) is used to connect heating pipe holder (10), stay pipe (2) and cylindrical cavity (3).
It is characterized in that: rubidium filtering blobs (5) and rubidium absorption dunk (6) close fit are inserted in the stay pipe (2), and the two respectively charges into the buffer gas of an amount of isotope rubidium and certain ingredients and proportioning.Stay pipe (2) is made (as alloy aluminum) by metal material, is used to support rubidium filtering blobs (5) and rubidium absorption dunk (6).Dielectric ring (4) close fit is inserted between stay pipe (2) and the cylindrical cavity (3), is used to reduce the effective volume of resonant cavity.Resonant ring (1) close fit is inserted between dielectric ring (4) and the rubidium absorption dunk (6), and available suitable viscose glue cements (as epoxy radicals bi-component glue), makes whole chamber form firm type structure.Resonant ring (1) is circular, and is gapped between resonant ring (1) and the stay pipe (2).Resonant ring (1) is made (as alloy aluminum) by metal material, and its effect is the resonance microwave field of excitation rings around it, and microwave field is similar to the TE011 pattern, can be used for encouraging the microwave resonance transition that absorbs rubidium atom in the bubble.Cylindrical cavity (3) is contained in outside the dielectric ring (4), links to each other with stay pipe (2) by screw (13), makes (as alloy aluminum) by metal material.Heating triode (11) is packed between heating pipe holder (10) and the cylindrical cavity (3), and heating pipe holder (10) is connected on stay pipe (2) and the heating triode (11) by screw (13).Can heat whole microwave cavity after heating triode (11) energising, making the rubidium metallic transition in rubidium filtering blobs (5) and the rubidium absorption dunk (6) is the operation material of Rb atom frequency marking---the rubidium steam.Have a groove on the heating pipe holder (10), be used to hold heating triode (11).End cap (7) is connected cylindrical cavity (3) by screw (13) and is an end face of microwave cavity.End cap (7) is made (as copper) by metal material.Coupling loop (8) one ends are welded on the end cap (7), and the other end is drawn out to outside the chamber, and as the input of microwave signal, effect is that microwave is coupled into the chamber.Photocell (9) sticks with glue in the end cap inner surface, is used to survey light signal.C field coil (12) is wound on the cylindrical cavity (3), is used to produce the magnetostatic field that is parallel to the microwave resonance cavity axis.This magnetostatic field is used to make
87Small division takes place in the hyperfine energy level of Rb, and provides atomic transition required quantization axle.By just can assemble the complete rubidium frequency standard microwave cavity bubble system of a cover with upper type, can be used for making Rb atom frequency marking.
Claims (7)
1, a kind of rubidium atomic frequency standard microwave cavity resonator, it is made of cylindrical cavity (3), dielectric ring (4), end cap (7), coupling loop (8), heating triode (11), C field coil (12), it is characterized in that rubidium filtering blobs (5) and rubidium absorption dunk (6) insert in the stay pipe (2), dielectric ring (4) inserts between stay pipe (2) and the cylindrical cavity (3), and resonant ring (1) inserts between dielectric ring (4) and the rubidium absorption dunk (6).
2, a kind of rubidium atomic frequency standard microwave cavity resonator according to claim 1 is characterized in that resonant ring (1) for circular, and is gapped between resonant ring (1) and the stay pipe (2).
3, a kind of rubidium atomic frequency standard microwave cavity resonator according to claim 1 is characterized in that cylindrical cavity (3) is contained in outside the dielectric ring (4), links to each other with stay pipe (2) by screw (13).
4, a kind of rubidium atomic frequency standard microwave cavity resonator according to claim 1, it is characterized in that heating triode (11) and pack between heating pipe holder (10) and the cylindrical cavity (3), heating pipe holder (10) is connected on stay pipe (2) and the heating triode (11) by screw (13).
5, a kind of rubidium atomic frequency standard microwave cavity resonator according to claim 1 is characterized in that: end cap (7) is connected cylindrical cavity (3) by screw (13) and is an end face of microwave cavity.
6, a kind of rubidium atomic frequency standard microwave cavity resonator according to claim 1 is characterized in that: coupling loop (8) one ends are welded on the end cap (7), and the other end stretches out outside the chamber.
7, a kind of rubidium atomic frequency standard microwave cavity resonator according to claim 1 is characterized in that: C field coil (12) is wound on the cylindrical cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620094970 CN2912015Y (en) | 2006-01-10 | 2006-01-10 | Rb atom frequency-marking microwave resonant cavity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620094970 CN2912015Y (en) | 2006-01-10 | 2006-01-10 | Rb atom frequency-marking microwave resonant cavity |
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| Publication Number | Publication Date |
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| CN2912015Y true CN2912015Y (en) | 2007-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200620094970 Expired - Fee Related CN2912015Y (en) | 2006-01-10 | 2006-01-10 | Rb atom frequency-marking microwave resonant cavity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100474692C (en) * | 2006-01-10 | 2009-04-01 | 中国科学院武汉物理与数学研究所 | Rubidium atomic frequency standard microwave cavity resonator |
| WO2013000176A1 (en) * | 2011-06-30 | 2013-01-03 | 江汉大学 | Microwave cavity bubble device |
-
2006
- 2006-01-10 CN CN 200620094970 patent/CN2912015Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100474692C (en) * | 2006-01-10 | 2009-04-01 | 中国科学院武汉物理与数学研究所 | Rubidium atomic frequency standard microwave cavity resonator |
| WO2013000176A1 (en) * | 2011-06-30 | 2013-01-03 | 江汉大学 | Microwave cavity bubble device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070613 |