CN106129573B - A kind of New type atom frequency marking microwave cavity - Google Patents
A kind of New type atom frequency marking microwave cavity Download PDFInfo
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- CN106129573B CN106129573B CN201610694090.8A CN201610694090A CN106129573B CN 106129573 B CN106129573 B CN 106129573B CN 201610694090 A CN201610694090 A CN 201610694090A CN 106129573 B CN106129573 B CN 106129573B
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- pole piece
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/06—Cavity resonators
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Abstract
The invention discloses a kind of New type atom frequency marking microwave cavities, including cylindrical cavity and slotted-tube, slotted-tube includes the pole piece that setting is integrated, boss and pedestal, pedestal is arranged in boss one end, pole piece number is the integer more than or equal to 2, pole piece is arranged in the boss other end, pedestal is fixed by screws in cylindrical cavity one end, boss and pole piece are arranged in cylindrical cavity, the outer wall of boss and the inner wall of cylindrical cavity fit closely, optical filtering bubble is provided in boss, each pole piece is fitted tightly in absorption bubble and is evenly distributed on absorption bubble surrounding, there are gaps between pole piece and the inner wall of cylindrical cavity, heater strip is wrapped in cylindrical cavity outer wall, the cylindrical cavity other end is provided with top cover, photocell is provided on the inside of top cover.Compared with prior art, the present invention having the following advantages that and effect: simple and compact for structure, assembly, debugging are easy, and high reliablity, microwave field direction factor is big, and chamber Q value is high, and frequency trim is convenient, can be widely applied to high-performance Rb atom frequency marking.
Description
Technical field
The present invention relates to Rb atom frequency markings, are more particularly to a kind of New type atom frequency marking microwave cavity, this novel microwave
Chamber has the characteristics that structure is simple, assembly is easy, high reliablity, is suitble to production high-performance Rb atom frequency marking.
Background technique
With the development of social science and technology, many fields require more accurate and stable frequency time signal.Frequency marking skill
The rapid development of art, so that the clock frequency source that atomic frequency standard is more reliable as one kind, gradually instead of traditional mechanical watch
And crystal oscillator clock, it is played an important role in the fields such as time service, punctual, navigator fix, synchronous communication.Rb atom frequency marking due to
The features such as its comprehensive performance is good and small in size, light-weight, low in energy consumption, it has also become current most widely used atomic frequency standard it
One.Rb atom frequency marking is made of physical system and circuit system two parts, and wherein microwave cavity is Rb atom frequency marking department of physics
The core component of system largely affects the performance of Rb atom frequency marking.
A kind of atomic frequency scale microwave cavity disclosed in this laboratory, by document Ganghua Mei, Miniatured
Microwave cavity for atomic frequencystandard [P] .US Patent:6225870B1,2001 is retouched
It states.This chamber is made of slotted-tube, dielectric ring, cylindrical cavity, rubidium absorption bubble, heater strip etc..Wherein, slotted-tube is a upper end
The metallic cylinder of several equidistant narrow slots is opened, the tiles metal structure between adjacent narrow slot is pole piece.Pole piece can be equivalent to electricity
Sense, narrow slot can be equivalent to capacitor, and pole piece and narrow slot constitute LC structure, occur with the microwave signal from feed-in outside microwave cavity
Resonance, forms required class TE011Mode trickle wave field.Class TE is specifically being discussed011When microwave field distribution under mode, the resonance of chamber
Mainly thus the inductance and capacitor of LC structure determine frequency, that is, are determined by every structural parameters of fluting lumen, such as open
Slot number mesh, groove width, groove depth, pole piece thickness, thickness, length of dielectric ring etc..The material of dielectric ring is usually that dielectric constant is greater than 1
It is nonmetallic, in practical application it was found that this structure member of dielectric ring suffer from the drawback that the dielectric constant of 1, medium by
The influence of temperature, it may occur that small variation, and then cause the irregular variation of chamber frequency；2, the thermal expansion coefficient of medium compares metal
It is big, when resonant cavity is in the working condition of continuous heating, expanded by heating can occur for medium, squeeze fluting intimate contact with it
Pipe metal pole piece brings it about deformation, that is, changes the structural parameters of fluting lumen, also will affect chamber frequency；3, rubidium clock permanent worker
In the case where work, a degree of aging can occur for the dielectric ring in resonant cavity.These factors reduce rubidium clock long-term work
Reliability can also generate corresponding influence to the long-time stability of rubidium clock.
Summary of the invention
Simple for structure the object of the present invention is to provide a kind of New type atom frequency marking microwave cavity, debugging is convenient, reliability
It is high.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of New type atom frequency marking microwave cavity, including cylindrical cavity, further include slotted-tube, and slotted-tube includes that setting is integrated
Pole piece, boss and pedestal, in boss one end, pole piece number is the integer more than or equal to 2 for pedestal setting, and pole piece is arranged in boss
The other end, pedestal are fixed by screws in cylindrical cavity one end, and boss and pole piece are arranged in cylindrical cavity, the outer wall of boss with
The inner wall of cylindrical cavity fits closely, and optical filtering bubble is provided in boss, and each pole piece is fitted tightly in absorption bubble and uniformly divides
For cloth there are gap between absorption bubble surrounding, pole piece and the inner wall of cylindrical cavity, heater strip is wrapped in cylindrical cavity outer wall, cylinder
The cavity other end is provided with top cover, is provided with photocell on the inside of top cover.
It is provided with step pipe and coupling ring on the inside of top cover as described above, step pipe is connect with coupling ring.
It is provided with metal bar on top cover as described above, metal bar one end extends to the gap between absorption bubble and top cover,
The metal bar other end is connect with the step frequency multiplier circuit module outside cylindrical cavity.
Cylindrical cavity side wall as described above offers threaded hole, and chamber frequency fine tuning screw rod is provided in threaded hole, and chamber frequency is micro-
Screw rod one end is adjusted to extend to the gap between pole piece and cylindrical cavity inner wall.
Compared with prior art, the present invention having the following advantages that and effect: simple and compact for structure, assembly, debugging are easy, can
By property height, microwave field direction factor is big, and chamber Q value is high, and frequency trim is convenient, can be widely applied to high-performance Rb atom frequency marking.
Detailed description of the invention
Fig. 1 is slotted-tube structural schematic diagram of the invention；
Fig. 2 is that the present invention utilizes magnetic-coupled structural schematic diagram；
Fig. 3 is that the present invention utilizes the structural schematic diagram being electrically coupled.
In figure: 1- slotted-tube, 2- cylindrical cavity, 3- top cover, 4- step pipe, 5- coupling ring, 6- photocell, 7- heater strip,
8- rubidium absorption bubble, 9- rubidium filtering blobs, 10- chamber frequency fine tuning screw rod, 11- screw；The first pole piece of 1a-, the second pole piece of 1b-, 1c- third
Pole piece, the 4th pole piece of 1d-, 1e- boss, 1f- pedestal.
Specific embodiment
Present invention is further described in detail with reference to the accompanying drawing.
Embodiment 1:
According to Fig. 1, Fig. 2 it is found that a kind of New type atom frequency marking microwave cavity includes slotted-tube 1, cylindrical cavity 2, top cover 3, rank
Jump pipe 4, coupling ring 5, photocell 6, heater strip 7, absorption bubble, the bubble that filters, chamber frequency fine tuning screw rod 10, screw 11.In the present embodiment
Absorption bubble is rubidium absorption bubble 8, and the bubble that filters is rubidium filtering blobs 9.Wherein slotted-tube 1 includes the first pole piece 1a being connected, second
Pole piece 1b, third pole piece 1c, the 4th pole piece 1d, boss 1e, pedestal 1f.Pedestal 1f setting in the one end boss 1e, the first pole piece 1a,
Second pole piece 1b, third pole piece 1c, the 4th pole piece 1d are uniformly arranged on the boss 1e other end, with screw 11 by pedestal 1f and cylinder
Cavity 2 is connected, and top cover 3 is connect with cylindrical cavity 2.The number of formation slot between pole piece (1a, 1b, 1c, 1d) or pole piece
It is greater than or equal to 2 integer.The size of the slot formed between each pole piece (1a, 1b, 1c, 1d) is identical, the first pole piece 1a,
Second pole piece 1b, third pole piece 1c, the size of the 4th pole piece 1d are also identical.The effect of boss 1e is to make 1 lower end outer wall of slotted-tube
Close contact is kept with the inner wall of cylindrical cavity 2, increases the mechanical firmness of resonant cavity.Simultaneously the first of 1 upper end of slotted-tube
Pole piece 1a, the second pole piece 1b, third pole piece 1c, there are gaps between 2 inner wall of the 4th pole piece 1d and cylindrical cavity, create microwave
Necessary condition existing for.The buffering of suitable metal rubidium and certain ingredients and proportion is filled in rubidium absorption bubble 8 and rubidium filtering blobs 9
Gas.8 close fit of rubidium absorption bubble is inserted among slotted-tube 1, and the first pole piece 1a, the second pole piece 1b, third pole piece 1c, the 4th are located at
Region between pole piece 1d, the first pole piece 1a, the second pole piece 1b, third pole piece 1c, the 4th pole piece 1d are evenly distributed on rubidium absorption
The surrounding of bubble 8, and fitted closely with rubidium absorption bubble 8；9 close fit of rubidium filtering blobs is inserted among the boss 1e of slotted-tube 1.With it is integrated
Optical filtering mode is compared, and absorption bubble and the separated separation of bubble that filters filter to design and be able to achieve better filter effect, is conducive to improve
The signal-to-noise ratio of atom frequency discrimination signal, so that Rb atom frequency marking be made to have high frequency stability.Heater strip 7 is wrapped in cylindrical cavity
2 outer walls are passed through DC current to heat cylindrical cavity 2.Heat passes through the slotted-tube pedestal 1f being connected with cylindrical cavity 2 and conducts to convex
Platform 1e, then conduct to pole piece, and then conduct extremely with its leakproof fit rubidium absorption bubble 8, rubidium metal therein is heated, is generated
The operation material of Rb atom frequency marking --- rubidium vapor atomic.It is this by metal fever road by the heat that heater strip 7 generates conduct to
The heating method of rubidium absorption bubble 8 is conducive to improve heating efficiency, reduces heat power consumption, and keep the Temperature Distribution of rubidium absorption bubble 8 equal
Even, this is good to the performance for improving Rb atom frequency marking.The compacting of step pipe 4 is welded in 3 inner surface recesses of top cover, and with
Coupling ring 5 closely welds, and is linked to be an entirety, external radiofrequency signal by pass through after match circuit step pipe 4 with couple
Ring 5 is fed into microwave cavity in a manner of magnetic-coupled, while realizing intracavitary high order frequency.2 side of cylindrical cavity is provided with screw hole,
Equipped with chamber frequency fine tuning screw rod 10 in hole, it can be changed by precession or back-out in the length of the intracavitary part of cylindrical cavity 2, with
Realize the fine tuning of resonance frequency.Photocell 6 can be with insulating sticky gluing in the inner surface of chamber top cover 3, for detecting in rubidium absorption bubble 8
The light absorption signal of rubidium vapor atomic.Slotted-tube 1, cylindrical cavity 2, top cover 3, chamber frequency fine tuning screw rod 10 and screw 11 can use no magnetic
Or low magnetic metal material processing.
Embodiment 2:
According to Fig. 1, Fig. 3 it is found that a kind of New type atom frequency marking microwave cavity includes slotted-tube 1, cylindrical cavity 2, top cover 3, visits
Needle 5, photocell 6, heater strip 7, absorption bubble, the bubble that filters, chamber frequency fine tuning screw rod 10, screw 11.Wherein slotted-tube 1 includes being linked to be one
The first pole piece 1a, the second pole piece 1b, third pole piece 1c, the 4th pole piece 1d, boss 1e, pedestal 1f of body.It is absorbed in the present embodiment
Bubble is rubidium absorption bubble 8, and the bubble that filters is rubidium filtering blobs 9.Pedestal 1f setting in the one end boss 1e, the first pole piece 1a, the second pole piece 1b,
Third pole piece 1c, the 4th pole piece 1d are uniformly arranged on the boss 1e other end, and pedestal 1f is connected with cylindrical cavity 2 with screw 11
It connects, top cover 3 is connect with cylindrical cavity 2.The number of the slot formed between pole piece (1a, 1b, 1c, 1d) or pole piece may be greater than or
Integer equal to 2.The size of the slot (1a, 1b, 1c, 1d) of formation between each pole piece is identical, each pole piece (1a, 1b, 1c,
Size 1d) is also identical.The effect of boss 1e is that the inner wall of 1 lower end outer wall of slotted-tube and cylindrical cavity 2 is made to keep close contact,
Increase the mechanical firmness of resonant cavity.Simultaneously in the first pole piece 1a of 1 upper end of slotted-tube, the second pole piece 1b, third pole piece 1c, the
There are gap between 2 inner wall of four pole piece 1d and cylindrical cavity, necessary condition existing for microwave field is created.Rubidium absorption bubble 8 and rubidium
Filter the buffer gas for steeping and filling suitable metal rubidium and certain ingredients and proportion in 9.Slotted-tube is inserted into 8 close fit of rubidium absorption bubble
Among 1, the first pole piece 1a for being located at, the second pole piece 1b, third pole piece 1c, the region between the 4th pole piece 1d, the first pole piece 1a,
Second pole piece 1b, third pole piece 1c, the 4th pole piece 1d are evenly distributed on the surrounding of rubidium absorption bubble 8, and closely paste with rubidium absorption bubble 8
It closes；9 close fit of rubidium filtering blobs is inserted among the boss 1e of slotted-tube 1.Compared with integrated filtering mode, absorption bubble and the bubble point that filters
The separation opened, which filters to design, is able to achieve better filter effect, is conducive to the signal-to-noise ratio for improving atom frequency discrimination signal, to make rubidium
Atomic frequency standard has high frequency stability.Heater strip 7 is wrapped in 2 outer wall of cylindrical cavity, is passed through DC current to heat cylinder
Cavity 2.Heat passes through the slotted-tube pedestal 1f being connected with cylindrical cavity 2 and conducts to boss 1e, then conducts to pole piece, and then conducts extremely
With its leakproof fit rubidium absorption bubble 8, rubidium metal therein being heated, the operation material of Rb atom frequency marking is generated --- rubidium steams
Gas atom.It is this to be conducted the heat that heater strip 7 generates to the heating method of rubidium absorption bubble 8 by metal fever road, be conducive to mention
High heating efficiency reduces heat power consumption, and makes the uniformity of temperature profile of rubidium absorption bubble 8, this is to the performance for improving Rb atom frequency marking
Beneficial.Different from embodiment 1, in the present embodiment, step pipe and is mounted in not as a structural member of microwave cavity
In step frequency multiplier circuit module outside microwave cavity, the microwave signal generated feed-in microwave in a manner of being electrically coupled probe 5
It is intracavitary.Probe 5 is the smooth thin stick of rigid metal in the surface with certain diameter and length, and by insulating, viscose glue is fixed on top cover
On 3, and closely welded with the output end of the step frequency multiplier circuit module outside chamber.2 side of cylindrical cavity is provided with screw hole, is equipped in hole
Chamber frequency fine tuning screw rod 10, can change it in the length of the intracavitary part of cylindrical cavity 2, to realize resonance by precession or back-out
The fine tuning of frequency.Photocell 6 can be former for detecting rubidium steam in rubidium absorption bubble 8 with insulating sticky gluing in the inner surface of chamber top cover 3
The light absorption signal of son.Slotted-tube 1, cylindrical cavity 2, top cover 3, chamber frequency fine tuning screw rod 10 and screw 11 can use no magnetic or low magnetic gold
Belong to material processing.
Embodiment described above is only that one is done to the purpose of the present invention preferably for example, being not intended to limit this hair
It is bright.Those skilled in the art do described embodiment suitable in spirit and principle in line with the invention
When modify or supplement or adopt it is similar method substitution, should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of New type atom frequency marking microwave cavity, including cylindrical cavity (2), which is characterized in that it further include slotted-tube (1), fluting
Pipe (1) includes pole piece, boss (1e) and the pedestal (1f) that setting is integrated, and pedestal (1f) is arranged in the one end boss (1e), pole piece
Number is the integer more than or equal to 2, and pole piece setting is fixed on cylinder by screw (11) in boss (1e) other end, pedestal (1f)
In the cylindrical cavity (2), the outer wall of boss (1e) is interior with cylindrical cavity (2) for cavity (2) one end, boss (1e) and pole piece setting
Wall fits closely, and optical filtering bubble is provided in boss (1e), and each pole piece is fitted tightly in absorption bubble and is evenly distributed on absorption
Surrounding is steeped, there are gap between pole piece and the inner wall of cylindrical cavity (2), heater strip (7) is wrapped in cylindrical cavity (2) outer wall, circle
Column cavity (2) other end is provided with top cover (3), is provided with photocell (6) on the inside of top cover (3), slotted-tube (1), cylindrical cavity
(2), top cover (3), chamber frequency fine tuning screw rod (10) and screw (11) is non-magnetic material or low magnetic metal material,
Metal bar is provided on top cover (3), metal bar one end extends to the gap between absorption bubble and top cover (3), and metal bar is another
One end step frequency multiplier circuit module external with cylindrical cavity (2) is connect,
Cylindrical cavity (2) side wall offers threaded hole, and chamber frequency fine tuning screw rod (10), chamber frequency fine tuning screw rod are provided in threaded hole
(10) one end extends to the gap between pole piece and cylindrical cavity (2) inner wall.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610694090.8A CN106129573B (en) | 2016-08-19 | 2016-08-19 | A kind of New type atom frequency marking microwave cavity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610694090.8A CN106129573B (en) | 2016-08-19 | 2016-08-19 | A kind of New type atom frequency marking microwave cavity |
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| CN106129573B true CN106129573B (en) | 2019-01-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110504963B (en) * | 2019-08-19 | 2020-12-25 | 中国科学院武汉物理与数学研究所 | Rectangular atomic frequency standard microwave cavity |
| WO2023082125A1 (en) * | 2021-11-11 | 2023-05-19 | 上海华为技术有限公司 | Resonant cavity, rubidium clock and communication apparatus |
| CN116979963A (en) * | 2023-09-25 | 2023-10-31 | 中国科学院精密测量科学与技术创新研究院 | A thickening integrated form bubble body structure for reducing rubidium atomic frequency standard atmospheric pressure influence |
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| CN1252628A (en) * | 1998-10-27 | 2000-05-10 | 中国科学院武汉物理与数学研究所 | Atomic frequency scale microwave cavity |
| CN101000974A (en) * | 2006-01-10 | 2007-07-18 | 中国科学院武汉物理与数学研究所 | Rubidium atomic frequency standard microwave cavity resonator |
| CN101510779A (en) * | 2009-03-27 | 2009-08-19 | 厦门大学 | Chip type rubidium filtering blobs |
| CN105846820A (en) * | 2016-03-21 | 2016-08-10 | 中国科学院武汉物理与数学研究所 | Pseudo-double-bubble device used for rubidium atom frequency standard |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2688640B1 (en) * | 1992-03-16 | 1994-07-01 | Tekelec Neuchatel Time Sa | ATOMIC FREQUENCY STANDARD. |
| JP2001308416A (en) * | 2000-04-27 | 2001-11-02 | Fujitsu Ltd | Rubidium atom oscillator |
| CN102299714B (en) * | 2011-06-30 | 2013-05-08 | 江汉大学 | Microwave cavity bubble device |
| CN203119878U (en) * | 2013-02-16 | 2013-08-07 | 江汉大学 | Physical system of atomic frequency standard |
| CN105446121A (en) * | 2015-12-10 | 2016-03-30 | 江汉大学 | Physical system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252628A (en) * | 1998-10-27 | 2000-05-10 | 中国科学院武汉物理与数学研究所 | Atomic frequency scale microwave cavity |
| CN101000974A (en) * | 2006-01-10 | 2007-07-18 | 中国科学院武汉物理与数学研究所 | Rubidium atomic frequency standard microwave cavity resonator |
| CN101510779A (en) * | 2009-03-27 | 2009-08-19 | 厦门大学 | Chip type rubidium filtering blobs |
| CN105846820A (en) * | 2016-03-21 | 2016-08-10 | 中国科学院武汉物理与数学研究所 | Pseudo-double-bubble device used for rubidium atom frequency standard |
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