CN112864566B - Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide - Google Patents
Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide Download PDFInfo
- Publication number
- CN112864566B CN112864566B CN202110007941.8A CN202110007941A CN112864566B CN 112864566 B CN112864566 B CN 112864566B CN 202110007941 A CN202110007941 A CN 202110007941A CN 112864566 B CN112864566 B CN 112864566B
- Authority
- CN
- China
- Prior art keywords
- cavity
- parallel plate
- microwave
- magnetic field
- parallel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The invention discloses a subminiature atomic frequency standard microwave cavity based on parallel plate waveguide, wherein one end of the cavity is provided with a rectangular counter bore as a cavity in the cavity, an atomic gas chamber is arranged in the cavity, the outer wall of the cavity is provided with a wire groove, a C-field coil is wound in the wire groove, a first parallel plate and a second parallel plate are symmetrically fixed on the side walls of two opposite inner side surfaces of the cavity, the side wall of the cavity is provided with a probe mounting hole, and a coupling probe extends into the cavity and is close to but not in contact with a strip-shaped metal sheet of the second parallel plate. The invention has small processing difficulty and easy control of precision to ensure consistency. There are two nondegenerate microwave field modes with high parallelism of the microwave magnetic field polarization direction, one is a TEM mode in which the microwave magnetic field polarization direction is perpendicular to the optical axis, and the other is a TE mode in which the microwave magnetic field polarization direction is parallel to the optical axis. So that the quantization axis can be vertical or parallel to the optical axis, and the flexibility of the microwave cavity structure design is increased.
Description
Technical Field
The invention relates to the technical field of atomic frequency standards, in particular to a subminiature atomic frequency standard microwave cavity based on a parallel plate waveguide.
Background
Accurate time is a cornerstone of digital communications, and highly accurate time is the basis for the increase in digital communications bandwidth and speed. With the rapid development of the communication industry, more accurate, stable and reliable timing devices are required in modern digital communication systems. The atomic frequency standard is a timing device taking accurate and stable transition frequency between atomic energy levels as a timing reference, and the rapid development of the related technology of the atomic frequency standard enables the atomic frequency standard to be used as a more accurate, stable and reliable clock source, so that the atomic frequency standard gradually replaces the traditional quartz crystal oscillator, and is widely applied to the field of digital communication.
The rubidium atom frequency standard is an atom frequency standard which utilizes a double resonance transition spectral line generated by the simultaneous action of light and microwave and rubidium atoms as a frequency discrimination signal to implement microwave frequency stabilization. The rubidium frequency standard is an atomic frequency standard which is most widely applied at present due to the characteristics of small volume, light weight, low power consumption, high reliability and the like. The rubidium atomic frequency standard consists of a physical system and a circuit system. The circuit system utilizes the atomic frequency discrimination signal to perform feedback control on the voltage-controlled crystal oscillator.
The physical system is the core of the rubidium frequency standard and mainly comprises an atomic pumping light source, an atomic gas chamber, a microwave resonant cavity and a photoelectric detector. The two ends of the atomic air chamber are transparent and are arranged in the microwave resonant cavity, the pumping light emitted by the pumping light source enters the air chamber through one transparent end of the air chamber, and the pumping light in the air chamber87The Rb vapour atoms performing optical pumping and the microwave magnetic field in the resonant cavity also acting on the gas chamber87Rb vapor atoms, produce an atomic frequency discrimination signal, and the signal is received by a photoelectric detector, and the strength of the signal determines the accuracy of the atomic frequency standard. Meanwhile, the physical system occupies most of the volume of the atomic frequency standard complete machine, and the microwave resonant cavity is the most main structural component in the physical system, so the volume of the physical system mainly depends on the miniaturization and integration degree of the microwave cavity, and further the miniaturization of the atomic frequency standard complete machine is influenced.
The design of the microwave cavity firstly requires that the resonance frequency of the microwave cavity is approximately equal to the microwave resonance transition frequency of atoms, and secondly requires that the polarization direction of the microwave magnetic field in the cavity is consistent as much as possible and is parallel to the direction of the quantization axis, so that the effect of the microwave magnetic field in the cavity is maximum, and rubidium atoms in the gas chamber are fully utilized. At present, the atomic frequency standard microwave cavity mainly comprises a standard cavity and a non-standard cavity. The standard cavity mainly comprises TE011Chamber and TE111The microwave cavity has two types, and the two types of microwave cavities have larger volumes and are not beneficial to the miniaturization of the atomic frequency standard. The non-standard cavity can effectively reduce the size and mainly comprises a magnetic control cavity, a slotted cavity, a rectangular cavity and a coaxial TEM cavity. The magnetron cavity is described by documents G.Mileti, I.Ruedi and H.Schweda, Proc.7th EFTF, 515(1992), the slotted cavity is described by documents GanghuaMei, miniature microwave cavity for atomic frequency analysis and US Patent:6225870B1,2001, the core structure of the two types of microwave cavities is a circular arc-shaped metal pole piece and a narrow groove between the pole pieces, the metal pole piece and the narrow groove form a special L-C structure, and the microwave magnetic field pattern obtained by excitation of the structure is similar to TE011The mode is very favorable for exciting atoms to generate clock transition signals, and is suitable for developing high-performance miniaturized rubidium atom frequency standardThe volume of the wave cavity is still large for subminiature atomic frequency standards. A typical Rectangular Cavity is described in the document H.E.Williams, Compact Rectangular Cavity for Rubidium Vapor Cell Frequency standards.37th annular Symposium on Frequency Control (1983), using TE101The structure is small, but the parallelism of the polarization direction of a microwave magnetic field and a quantization axis is limited, so that the frequency discrimination signal cannot be generated by fully utilizing atoms. A coaxial TEM cavity is described in document j. dune, subminiature microwave cavity, CN1452798A,2003, and this cavity is a lumped L-C structure formed by a conducting rod extending into the cavity and a gap between the rod and the cavity wall to generate resonance, the resonance frequency is mainly determined by the geometric dimension of the conducting rod and the distance from the conducting rod to the cavity wall, and is basically not limited by the size and shape of the cavity, and is suitable for subminiature rubidium atomic frequency standard, but the parallelism of the polarization direction of the microwave magnetic field is not high when the cavity is working, and is not good for exciting atoms to generate clock transition signals.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a subminiature atomic frequency standard microwave cavity based on a parallel plate waveguide, which has the advantages of small volume, flexible size, simple structure, easy processing and assembly, and two microwave field modes of TEM and TE capable of exciting atoms to generate clock transition, and can be used for developing and producing a subminiature rubidium atomic frequency standard.
The parallel plate waveguide structure is very simple, consisting of only two parallel plates or strips, and can support the TEM mode. An ideal parallel-plate waveguide structure is shown in figure 1 and consists of two parallel plates (or strips) spaced apart by a distance d and having a width W, a dielectric constant e and a permeability mu between the two plates (or strips). The TEM mode field lines supported by the parallel plate waveguide are shown in FIG. 2, the power lines are perpendicular to the plane of the parallel plate (or strip), the closed magnetic lines are wound around the parallel plate (or strip), and the directions of the magnetic lines between the plates are highly parallel, which indicates that the polarization direction parallelism of the microwave magnetic field is high. However, the electromagnetic wave in the parallel plate waveguide is a traveling wave, the energy loss of the electromagnetic field is large, the energy utilization rate is low, and if the parallel plate waveguide is arranged in the closed metal cavity and resonates at the oscillation frequency of the transmitted electromagnetic wave, the utilization rate of the electromagnetic energy can be improved.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a subminiature atomic frequency standard microwave cavity based on parallel plate waveguide comprises a cavity, wherein one end of the cavity is provided with a rectangular counter bore as a cavity in the cavity, an atomic gas chamber is arranged in the cavity, the other end of the cavity is provided with a light inlet, one end of the cavity is an open end and is used as a light outlet of the cavity, the other end of the cavity is communicated with the light inlet, the outer wall of the cavity is provided with a wire slot, a C-field coil is wound in the wire slot,
the first parallel plate and the second parallel plate are symmetrically fixed on the side walls of two opposite inner side surfaces of the cavity, the first parallel plate and the second parallel plate respectively comprise a non-metal substrate and a strip-shaped metal sheet arranged on the non-metal substrate, the strip-shaped metal sheet faces to the atom air chamber in the cavity,
the light outlet hole cover of the cavity is provided with an end cover, the inner surface of the end cover is fixed with a photoelectric detector,
the side wall of the side of the cavity is provided with a probe mounting hole, the side wall of the side of the cavity where the probe mounting hole is located is different from the side walls of the cavities corresponding to the first parallel plate and the second parallel plate, and one end of the coupling probe is in insulated connection with the probe mounting hole of the cavity; the other end of the coupling probe extends into the cavity and is close to but not contacted with the strip-shaped metal sheet of the second parallel plate.
The non-metal substrate is an aluminum oxide ceramic plate, and the strip-shaped metal sheet is a copper foil.
The nonmetal substrate is RO3010 Rogers board, and the strip metal sheet is copper foil.
The inner side wall of the cavity is provided with the bubble tail groove, and the bubble tail of the atomic gas chamber is arranged in the bubble tail groove.
The bubble tail of the atom gas chamber as described above faces the end face of the end cap and is located close to the edge of the end face of the atom gas chamber.
The first parallel plate and the second parallel plate generate microwave magnetic field polarization direction in the atomic gas chamber, which is vertical to the optical axis, and the static magnetic field direction generated by the C-field coil is vertical to the optical axis and is consistent with the microwave magnetic field polarization direction.
The first parallel plate and the second parallel plate generate microwave magnetic field polarization direction in the atomic gas chamber parallel to the optical axis, and the static magnetic field direction generated by the C-field coil is parallel to the optical axis and consistent with the microwave magnetic field polarization direction.
The invention has the following technical characteristics:
1. the cavity is of a cylindrical structure, the two ends of the cavity are open, the processing difficulty is small, and the accuracy is easy to control so as to ensure the consistency.
2. The first flat plate and the second flat plate are nonmetal substrates loaded with strip-shaped metal sheets, and the nonmetal substrates can be made of aluminum oxide ceramic plates or glass fiber plates and the like. The strip-shaped metal sheet is a regular cuboid, can be made of aluminum foil, gold foil, copper foil or metal with gold or silver plated on the surface, and has a thickness of more than 1 μm. The first flat plate and the second flat plate can be directly made of Rogers plates or FR4 plates through a printing plate process, and the processing precision and consistency can be guaranteed at low cost.
3. Two nondegenerate microwave field modes with high parallelism of the polarization directions of the microwave magnetic fields exist in the microwave cavity, one mode is a TEM mode, the polarization direction of the microwave magnetic field is vertical to the optical axis in the mode, the other mode is a TE mode, and the polarization direction of the microwave magnetic field is parallel to the optical axis in the mode. The characteristic enables the quantization axis to be vertical or parallel to the optical axis, and the flexibility of the microwave cavity structure design is increased.
The invention has simpler structure and lower cost; compared with a standard rectangular cavity and a subminiature coaxial TEM cavity, the microwave magnetic field mode of the invention is easier to excite atomic transition to generate an atomic signal. Meanwhile, the invention has two microwave field modes of TEM and TE which can stimulate atoms to generate clock transition, can flexibly change the internal dimension and the cavity appearance according to different design requirements, and is suitable for developing and producing the subminiature rubidium atom frequency standard meeting different customization requirements.
Drawings
Fig. 1 is a geometric configuration diagram of a parallel plate waveguide.
Fig. 2 is a schematic view of the field line distribution of a parallel plate waveguide.
Fig. 3 is a schematic structural view of a subminiature atomic frequency scale microwave cavity based on a parallel plate waveguide according to example 1, wherein (a) is a front view internal schematic view; (b) is a side view internal schematic diagram.
Fig. 4 is an exploded view of a subminiature atomic frequency scale microwave cavity based on a parallel plate waveguide according to example 1.
Fig. 5 is a structural view of the chamber of embodiment 1.
Fig. 6 is a structural view of a first parallel plate and a second parallel plate in example 1, wherein (a) is a distribution diagram of the first parallel plate and the second parallel plate, and (b) is a structural schematic diagram of the first parallel plate/the second parallel plate.
FIG. 7 is a TEM microwave field pattern of example 1, in which (a) is a sectional TEM microwave field pattern having a section parallel to the first parallel plate and the second parallel plate, and (b) is a sectional TEM microwave field pattern having a section perpendicular to the first parallel plate and the second parallel plate.
Fig. 8 is a schematic structural view of a subminiature atomic frequency scale microwave cavity based on a parallel plate waveguide according to example 2, in which (a) is a front view internal view; (b) is a side view internal schematic diagram.
Fig. 9 is an exploded view of a subminiature atomic frequency standard microwave cavity based on a parallel plate waveguide of example 2.
FIG. 10 is a structural view of a chamber in example 2.
FIG. 11 is a TE microwave pattern diagram of example 2, in which (a) is a TEM microwave pattern diagram having a section parallel to the first and second parallel plates, and (b) is a TEM microwave pattern diagram having a section perpendicular to the first and second parallel plates.
Wherein: 1-a cavity; 2-a first parallel plate; 3-a second parallel plate; 4-atomic gas cell; 5-a coupling probe; 6-tuning screw; 7-end cap; 8-a photodetector; 9-C field coil.
Detailed Description
The present invention will be described in further detail with reference to examples for the purpose of facilitating understanding and practice of the invention by those of ordinary skill in the art, and it is to be understood that the present invention has been described in the illustrative embodiments and is not to be construed as limited thereto.
Example 1:
as can be seen from fig. 3, 4, 5 and 6, the subminiature atomic frequency standard microwave cavity based on the parallel plate waveguide comprises a cavity 1, a first parallel plate 2, a second parallel plate 3, an atomic gas chamber 4, a coupling probe 5, a tuning screw 6, an end cap 7, a photodetector 8 and a C-field coil 9.
The cavity 1 is made of aluminum alloy material, the shape is a cuboid with the length, the height, the width and the height of 13.2mm, 7.2mm and 10.5mm, one end of the cavity 1 is provided with a rectangular counter bore as a cavity in the cavity 1, an atomic air chamber 4 is arranged in the cavity, the other end of the cavity 1 is provided with a light inlet, the length, the height and the width of the cavity are 7.2mm, 5.2mm and 9.5mm, one end of the cavity is an open end and is used as a light outlet of the cavity 1, the other end of the cavity is communicated with the light inlet, the cavity 1 is cylindrical, and the outer wall of the cavity 1 is provided with a wire casing for winding a Helmholtz coil;
in this embodiment, the cavity 1 inside wall is opened there is the bubble tail recess for place the bubble tail.
The first parallel plate 2 and the second parallel plate 3 both comprise a non-metal substrate and a strip-shaped metal sheet arranged on the non-metal substrate, and the first parallel plate 2 and the second parallel plate 3 are completely consistent in material, shape and process. The non-metal substrate material can be an aluminum oxide ceramic plate with the thickness of 0.5mm, and the shape of the non-metal substrate is a rectangle with the thickness of 5.2mm 9.5 mm; the strip-shaped metal sheet is a copper foil, has the thickness of 18 mu m and is rectangular with the shape of 4.2mm by 7.1 mm. The first parallel plate 2 and the second parallel plate 3 are manufactured by a printed board process and symmetrically fixed on the side walls of two opposite inner side surfaces of the cavity; the strip-shaped metal sheet faces the atomic gas cell 4 in the chamber 1.
The atomic gas chamber 4 is a closed cuboid glass bubble with the length, the height and the width of 6mm, 4mm and 6mm, the two ends of the atomic gas chamber are transparent, the bubble tail of the atomic gas chamber 4 is positioned at the side part of the atomic gas chamber 4, and the bubble tail is positioned in a bubble tail groove arranged on the inner side wall of the cavity 1. The atom air chamber 4 is fixed in the cavity 1 through silica gel and is positioned between the first parallel plate 2 and the second parallel plate 3. The atomic gas chamber 4 is filled with working atomic metal vapor and buffer gas with set air pressure;
the coupling probe 5 is a metal copper round bar, one end of the coupling probe is bonded in a probe mounting hole on the cavity 1 through epoxy resin adhesive, the probe mounting hole is formed in the side wall of the cavity 1, the side wall of the cavity 1 where the probe mounting hole is located is different from the side walls of the cavities 1 corresponding to the first parallel plate 2 and the second parallel plate 3, and one end of the coupling probe 5 is in insulation connection with the probe mounting hole of the cavity 1; the other end of the coupling probe 5 extends into the cavity 1 and is close to but not contacted with the strip-shaped metal sheet of the second parallel plate 3;
the side wall of the side surface of the cavity 1 is provided with a tuning threaded hole, the tuning threaded hole is opposite to the probe mounting hole, the tuning screw 6 is a hard round copper bar with threads, and the length of the copper bar extending into the cavity 1 is changed by screwing in and out the tuning screw in the threaded hole, so that tuning of the microwave cavity is realized;
the end cover 7 is made of aluminum alloy materials and covers the light outlet hole of the cavity 1, the end cover 7 and the cavity 1 jointly form a basically closed metal cavity, and a photoelectric detector 8 is fixed on the inner surface of the end cover 7 and used for detecting optical signals;
the outer wall of the cavity 1 is provided with a wire slot, the C field coil 9 is an enameled wire with the diameter of 0.15mm, the C field coil 9 is tightly wound in the wire slot to form a Helmholtz coil, an even and stable static magnetic field is generated, and a quantization shaft is provided for microwave transition of atoms in the air chamber.
Fig. 7 shows the microwave pattern in the cavity of the present embodiment, (a) is the microwave pattern of the section parallel to the first parallel plate 2 and the second parallel plate 3 along the optical axis direction; (b) the microwave field pattern is a section perpendicular to the first parallel plate 2 and the second parallel plate 3 along the optical axis direction (the optical axis direction is the direction from the light inlet to the light outlet). As can be seen from the figure, the length direction of the strip-shaped metal sheets of the first parallel plate 2 and the second parallel plate 3 is parallel to the optical axis direction, the microwave field in the cavity is in a TEM mode at a proper resonant frequency by setting the length and width values of the strip-shaped metal sheets of the first parallel plate 2 and the second parallel plate 3, the polarization direction of the microwave field generated by the first parallel plate 2 and the second parallel plate 3 in the atomic gas chamber 4 is perpendicular to the optical axis, and the distribution of the magnetic lines of force has better uniformity. The C-field coil in the embodiment is designed as a Helmholtz coil and is arranged on the outer sides of two side walls adjacent to a parallel plate mounting wall, the direction of the generated static magnetic field is perpendicular to the optical axis and is consistent with the polarization direction of the microwave magnetic field, so that rubidium atoms can be excited to perform clock transition, and further microwave search signals with high signal-to-noise ratio can be obtained, and the design is beneficial to the research of subminiature high-performance rubidium atom frequency standard.
Example 2:
as shown in fig. 8, 9 and 10, the subminiature atomic frequency standard microwave cavity based on the parallel plate waveguide comprises a cavity body 1, a first parallel plate 2, a second parallel plate 3, an atomic gas chamber 4, a coupling probe 5, a tuning screw 6, an end cover 7, a photoelectric detector 8 and a C-field coil 9.
The cavity 1 is made of an aluminum alloy material, the shape of the cuboid is 14mm 8mm 21mm in length and width, and the size of the cavity is 7.2mm 5.2mm 9.5mm in length and width;
the first parallel plate 2 and the second parallel plate 3 both comprise a non-metal substrate and a strip-shaped metal sheet arranged on the non-metal substrate. The non-metal substrate is made of Rogers board RO3010, the non-metal substrate is 8mm by 20.5mm rectangular in appearance, and the thickness is 0.5 mm; the strip-shaped metal sheet is a rectangular copper foil with the shape of 7mm x 10mm and the thickness of 18 mu m. The first parallel plate 2 and the second parallel plate 3 are manufactured by a printed board process and symmetrically fixed on the inner walls of two opposite side walls of the cavity 1;
the atomic gas cell 4 is a closed cuboid glass bulb with the size of length, height and width of 8mm, 5mm and 17 mm.
In this embodiment, the inner side wall of the cavity 1 is not provided with a bubble tail groove, and the bubble tail is located at a position where the atom air chamber 4 faces the end face of the end cover 7 and is close to the edge of the end face of the atom air chamber 4.
The other structure of a subminiature atomic frequency standard microwave cavity based on a parallel plate waveguide in this embodiment is the same as that of embodiment 1.
Fig. 11 shows the microwave pattern in the cavity of the present embodiment, (a) is the microwave pattern of the section parallel to the first parallel plate 2 and the second parallel plate 3 along the optical axis direction; (b) the microwave field pattern is shown along the optical axis direction and perpendicular to the cross section of the first parallel plate 2 and the second parallel plate 3. As can be seen from the figure, the longitudinal direction of the strip-shaped metal sheets of the first parallel plate 2 and the second parallel plate 3 is parallel to the optical axis direction by setting the first parallel plateThe length and width of the strip-shaped metal sheets of the plate 2 and the second parallel plate 3 are equal, the polarization direction of the microwave magnetic field generated by the first parallel plate 2 and the second parallel plate 3 in the atomic gas chamber 4 is parallel to the optical axis, and TE-like011The magnetic lines of force have better uniformity. The quantization axis in the same direction is designed according to the polarization direction of the magnetic field, the C field coil is made into a solenoid coil in the embodiment, the C field coil is wound on the outer wall of the cavity 1, the direction of the generated static magnetic field is parallel to the optical axis and is consistent with the polarization direction of the microwave magnetic field, rubidium atoms are very favorably excited to perform clock transition, and then microwave search signals with high signal-to-noise ratio are obtained, so that the method is beneficial to the research of subminiature high-performance rubidium atom frequency standard.
According to the two embodiments, the ultra-small atomic frequency standard microwave cavity based on the parallel plate waveguide has the advantages of small volume, flexible size, simple structure, easiness in processing and assembly, two microwave field modes capable of exciting atoms to generate clock transition, different field modes can be selected according to different design requirements, the internal size and the shape of the cavity can be flexibly changed, and the ultra-small atomic frequency standard microwave cavity based on the parallel plate waveguide is suitable for developing and producing ultra-small rubidium atomic frequency standards meeting different customized requirements.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (1)
1. A subminiature atomic frequency standard microwave cavity based on a parallel plate waveguide comprises a cavity body (1) and is characterized in that one end of the cavity body (1) is provided with a rectangular counter bore serving as a cavity in the cavity body (1), an atomic air chamber (4) is arranged in the cavity, the other end of the cavity body (1) is provided with a light inlet, one end of the cavity body is an open end and serves as a light outlet of the cavity body (1), the other end of the cavity body is communicated with the light inlet, the outer wall of the cavity body (1) is provided with a wire groove, a C-field coil (9) is wound in the wire groove,
the first parallel plate (2) and the second parallel plate (3) are symmetrically fixed on the side walls of two opposite inner side surfaces of the cavity, the first parallel plate (2) and the second parallel plate (3) respectively comprise a non-metal substrate and a strip-shaped metal sheet arranged on the non-metal substrate, the strip-shaped metal sheet faces to an atom air chamber (4) in the cavity (1),
an end cover (7) is arranged on the light outlet hole cover of the cavity (1), a photoelectric detector (8) is fixed on the inner surface of the end cover (7),
the side wall of the side of the cavity (1) is provided with a probe mounting hole, the side wall of the side of the cavity (1) where the probe mounting hole is located is different from the side walls of the cavity (1) corresponding to the first parallel plate (2) and the second parallel plate (3), and one end of the coupling probe (5) is in insulation connection with the probe mounting hole of the cavity (1); the other end of the coupling probe (5) extends into the cavity (1) and is close to but not contacted with the strip-shaped metal sheet of the second parallel plate (3),
the inner side wall of the cavity (1) is provided with a bubble tail groove, the bubble tail of the atomic gas chamber (4) is arranged in the bubble tail groove,
the polarization direction of the microwave magnetic field generated by the first parallel plate (2) and the second parallel plate (3) in the atomic gas chamber (4) is vertical to the optical axis, the direction of the static magnetic field generated by the C-field coil is vertical to the optical axis and is consistent with the polarization direction of the microwave magnetic field,
or the polarization direction of the microwave magnetic field generated by the first parallel plate (2) and the second parallel plate (3) in the atomic gas chamber (4) is parallel to the optical axis, and the direction of the static magnetic field generated by the C-field coil is parallel to the optical axis and is consistent with the polarization direction of the microwave magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110007941.8A CN112864566B (en) | 2021-01-05 | 2021-01-05 | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110007941.8A CN112864566B (en) | 2021-01-05 | 2021-01-05 | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112864566A CN112864566A (en) | 2021-05-28 |
| CN112864566B true CN112864566B (en) | 2022-05-13 |
Family
ID=76003781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110007941.8A Active CN112864566B (en) | 2021-01-05 | 2021-01-05 | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112864566B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2081025A (en) * | 1980-07-31 | 1982-02-10 | Hewlett Packard Co | Resonant cavity device |
| US4495478A (en) * | 1983-02-16 | 1985-01-22 | Litton Systems, Inc. | Cavity resonator for atomic frequency standard |
| CN101237077A (en) * | 2008-01-29 | 2008-08-06 | 四川天奥星华时频技术有限公司 | Small Rb atom frequency marking cavity bubble system |
| CN101510779A (en) * | 2009-03-27 | 2009-08-19 | 厦门大学 | Chip type rubidium filtering blobs |
| CN202261239U (en) * | 2011-09-13 | 2012-05-30 | 中国航天科工集团第二研究院二〇三所 | Microwave cavity used for passive rubidium atom frequency marker |
| CN203149300U (en) * | 2013-01-31 | 2013-08-21 | 江汉大学 | Atomic clock |
| 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 |
| CN110504963A (en) * | 2019-08-19 | 2019-11-26 | 中国科学院武汉物理与数学研究所 | A kind of rectangle atomic frequency scale microwave cavity |
| CN111208060A (en) * | 2020-02-14 | 2020-05-29 | 复旦大学 | Sensing chip and preparation method, detection system and detection method thereof |
-
2021
- 2021-01-05 CN CN202110007941.8A patent/CN112864566B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2081025A (en) * | 1980-07-31 | 1982-02-10 | Hewlett Packard Co | Resonant cavity device |
| US4495478A (en) * | 1983-02-16 | 1985-01-22 | Litton Systems, Inc. | Cavity resonator for atomic frequency standard |
| CN101237077A (en) * | 2008-01-29 | 2008-08-06 | 四川天奥星华时频技术有限公司 | Small Rb atom frequency marking cavity bubble system |
| CN101510779A (en) * | 2009-03-27 | 2009-08-19 | 厦门大学 | Chip type rubidium filtering blobs |
| CN202261239U (en) * | 2011-09-13 | 2012-05-30 | 中国航天科工集团第二研究院二〇三所 | Microwave cavity used for passive rubidium atom frequency marker |
| CN203149300U (en) * | 2013-01-31 | 2013-08-21 | 江汉大学 | Atomic clock |
| 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 |
| CN110504963A (en) * | 2019-08-19 | 2019-11-26 | 中国科学院武汉物理与数学研究所 | A kind of rectangle atomic frequency scale microwave cavity |
| CN111208060A (en) * | 2020-02-14 | 2020-05-29 | 复旦大学 | Sensing chip and preparation method, detection system and detection method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112864566A (en) | 2021-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2022148211A1 (en) | Miniature microwave cavity for atomic clock, and manufacturing method | |
| US4692727A (en) | Dielectric resonator device | |
| CN110504963B (en) | Rectangular atomic frequency standard microwave cavity | |
| WO2022148210A1 (en) | Microstrip structure-based subminiature atomic frequency standard microwave cavity | |
| US6133800A (en) | Subminiature microwave cavity | |
| CN112864566B (en) | Subminiature atomic frequency standard microwave cavity based on parallel plate waveguide | |
| CN108667454B (en) | High-uniformity low-temperature-coefficient cavity bubble system | |
| US3931569A (en) | Narrow cavity low cost EPR spectrometer | |
| US6812800B2 (en) | Atomic oscillator | |
| WO2012085506A2 (en) | Lucent waveguide electromagnetic wave plasma light source | |
| US20120293067A1 (en) | Lamp | |
| CN112332841B (en) | Rectangular microwave cavity for rubidium frequency standard | |
| JPH05341027A (en) | Sheet cavity resonator for electronic spin resonance | |
| US9299554B2 (en) | Lucent waveguide electromagnetic wave | |
| JPH11298215A (en) | Dielectric resonator and dielectric filter using the resonator | |
| US3728650A (en) | Ghost-mode shifted dielectric window | |
| US9912026B2 (en) | Low-loss continuously tunable filter and resonator thereof | |
| JPH11125606A (en) | Wave guide apparatus and electric characteristic-measuring apparatus | |
| JP2004072730A (en) | Dielectric filter, communication equipment, and method of controlling resonance frequency | |
| JPH0964735A (en) | Rubidium atom oscillator | |
| US3202945A (en) | Cavity resonator tuned by means of magnetically controlled coaxial ferrite material located in an auxiliary cavity | |
| CN116566328B (en) | Crystal oscillator and integration method | |
| JP2003130903A (en) | Method of measuring dielectric constant | |
| JP3239957B2 (en) | Thin film cavity resonator with pole piece | |
| JP2006184210A (en) | Apparatus for measuring dielectric constant and method of measuring dielectric constant using it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221021 Address after: 214401 502-1, Building 1, No. 23, Zhenyang Road, Qingyang Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangyin Tongxiang Technology Co.,Ltd. Address before: 430071 Xiao Hong, Wuchang District, Wuhan District, Hubei, Shanxi, 30 Patentee before: Institute of precision measurement science and technology innovation, Chinese Academy of Sciences |