CN202205694U - Magnetron capable of realizing miniaturization of microwave equipment - Google Patents

Magnetron capable of realizing miniaturization of microwave equipment Download PDF

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Publication number
CN202205694U
CN202205694U CN2011202791678U CN201120279167U CN202205694U CN 202205694 U CN202205694 U CN 202205694U CN 2011202791678 U CN2011202791678 U CN 2011202791678U CN 201120279167 U CN201120279167 U CN 201120279167U CN 202205694 U CN202205694 U CN 202205694U
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CN
China
Prior art keywords
magnetron
output
component
anode
shell structure
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Withdrawn - After Issue
Application number
CN2011202791678U
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Chinese (zh)
Inventor
王彩育
钟立松
陈庆华
王贤友
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Guangdong Witol Vacuum Electronic Manufacture Co Ltd
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Guangdong Witol Vacuum Electronic Manufacture Co Ltd
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Priority to CN2011202791678U priority Critical patent/CN202205694U/en
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Abstract

The utility model provides a magnetron capable of realizing miniaturization of microwave equipment, comprising an anode electrode component, a cathode component, an output component and a magnet circuit component; wherein the output component comprises an antenna, a metal tube shell, an output ceramic, an exhaust pipe and an antenna cap; a lower end of the exhaust pipe is connected with a stepped metal thin shell structure, the structure is formed by at least two cylinders which are connected along an outer wall surface of the thin shell and have different diameters and different heights, and the each cylinder has an effective electrical length L which is within the range of 0.10 lambda to 0.2 lambda, wherein the lambda is a pai-mode oscillating wavelength of the magnetron. By adopting the above structure of the magnetron, a total length of the output component of the magnetron can be greatly reduced, and the impedance from the magnetron to a waveguide can realize matching transition, then a microwave power generated by the magnetron can be effectively coupled to the waveguide, thus the magnetron may have the advantages of stable working and high output efficiency; and the output component of the magnetron can be used for the waveguide with a small size in the premise of not affecting output efficiency and stability of the magnetron, thereby achieving the purpose of equipment miniaturization.

Description

A kind of magnetron of realizing the microwave equipment miniaturization
Technical field
The utility model relates to magnetron, particularly a kind of microwave oven of the 5.8GHz of being used for frequency range, industrial microwave apparatus etc. and can realize the magnetron of microwave equipment miniaturization.
Background technology
Magnetron is the radio tube that produces microwave, because oscillation efficiency is high, microwave output power is big, and except being widely used in household microwave oven, the source takes place the microwave power that also is widely used as microwave processing equipments such as industry heating, chemical treatment.And, need magnetron such as the 5.8GHz frequency range continuous wave magnetron of higher frequency etc. along with the development of microwave technology, and improve microwave-thermal conversion efficiency, thereby production efficiency improves, realize the target of energy-saving and emission-reduction.
As shown in Figure 1, existing magnetron generally by anode component, cathode assembly 2, output block and form magnetic loop etc. critical piece constitute.The magnetron middle body is installed cathode assembly 2, with it anode component is installed coaxially; Cathode assembly 2 comprises center fulcrum bar component and the limit fulcrum bar component that has shielding cap; Anode component is to be made up of anode tube 1, blade 11, big commissure ring 12, little commissure ring 13 and antenna.At the axial direction of anode component the magnetic pole 3 of a pair of taper is installed symmetrically, magnetic pole 3 constitutes magnetic loop with the magnet 9 that is installed in the magnetic pole outside and outside support assembly and installation base plate.Output block is made up of Can 5, output pottery 6 and blast pipe 7 and the antenna cap 8 that an end is installed in antenna 4 on any blade 11, magnetic pole 3 outsides.
As shown in Figure 2, in actual use, from exporting pottery 6 to antenna cap 8 and be attached thereto the antenna that connects 4 and form incentive probes, extend in the rectangular waveguide 10 in the output block, realize the impedance conversion transition of 10 of output antenna 4 and the rectangular waveguides of magnetron.Wherein the size and the distance of relative waveguide short face that stretch in the rectangular waveguide 10 of output block will determine the microwave power of magnetron to be sent to load effectively.The magnetron efferent of existing 2.45GHz frequency range and the physical dimension of rectangular metal waveguide are mainly set by following:
The length that efferent stretches in the metal rectangular waveguide is 26 ~ 30mm, and the length of antenna cap is 16 ~ 18mm, and it is 11 ~ 14mm that blast pipe is cut off length.The sectional dimension of metal rectangular waveguide is 54.6mm.
As to make the microwave equipment miniaturization, need carry out miniaturization to the size of rectangular waveguide and handle, and the magnetron output block of existing 2.45GHz frequency range; Its size is bigger, when being installed in the waveguide of reduced size, is prone to cause the insulation distance deficiency to cause problems such as sparking; Simultaneously, because of output block can not be realized the impedance matching transition from magnetron to the metal rectangular waveguide well, thereby make that the load standing wave is big; Cause the magnetron power output low, problems such as job insecurity.
Summary of the invention
The purpose of the utility model is to consider above problem, and a kind of magnetron of realizing the microwave equipment miniaturization is provided, and on the basis that does not influence delivery efficiency and stability, can realize being used for the waveguide of reduced size, thereby can reach the purpose of device miniaturization.
The technical scheme that realizes the utility model purpose is, a kind of magnetron of realizing the microwave equipment miniaturization,
Comprise anode component, cathode assembly, output block and flux circuit components, anode component by anode tube cylindraceous, be fixed on radial a plurality of anode blades and the big commissure ring on the inner wall surface of anode tube, little commissure ring is formed; Cathode assembly is the helicoidal structure with the coaxial assembling of above-mentioned anode; Constitute flux circuit components at taper magnetic pole of on above-mentioned anode component direction of principal axis, installing and the magnet that is installed in the magnetic pole outside; Be separately installed with the output block of exporting as microwave power in the outside of said magnetic pole; Said output block comprises antenna, Can, output pottery, blast pipe and antenna cap; Wherein antenna one end is connected with any blade in the anode component, and the other end passes the hole on the magnetic pole, through Can and output pottery; Final and blast pipe links together; It is characterized in that said blast pipe lower end is connected with stage shape metal shell structure body, said stage shape metal shell structure body is that at least two sections different-diameters of L and the cylinder of height connect and compose by effective electrical length; Its effective electrical length L is in 0.10 λ ~ 0.2 λ scope, and wherein λ is a magnetron pi-mode oscillation wavelength.
The above-mentioned stage shape metal shell structure body inside axially progression of ladder is more than 2.
Above-mentioned stage shape metal shell structure body inner step height h1 axially is 3 ~ 6mm; Reaching the flange height h2 that is connected with the output pottery is 1 ~ 3mm, and the maximum of the cylindrical portion diameter d r1 of stage shape metal shell structure body is dr1≤0.95dr2 with the relation of the ceramic inside diameter dr2 of output.
It is below the 6.5mm that above-mentioned blast pipe is cut off director's degree La.
The beneficial effect of the utility model is; Owing to adopted the blast pipe lower end to be connected with stage shape metal shell structure body; And reduced the size of each component parts of output block, make the output block total length of magnetron dwindle greatly, and the impedance that can make magnetron arrive waveguide realize matching transition; Thereby the magnetron working stability, delivery efficiency is high; The magnetron output block can be realized being used for the waveguide of reduced size, thereby can reach the purpose of device miniaturization on the basis that does not influence magnetron delivery efficiency and stability.
Description of drawings
Fig. 1 is the profile of existing magnetron;
Fig. 2 is the existing position view of magnetron output block in the metal rectangular waveguide;
Fig. 3 is the output block profile of the utility model embodiment 1;
Fig. 4 is the output block profile of the utility model embodiment 2;
Fig. 5 is the position view of the utility model output block in the metal rectangular waveguide.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Embodiment 1:
As shown in Figure 3; A kind of magnetron of realizing the microwave equipment miniaturization; Comprise anode component, cathode assembly 2, output block and flux circuit components, anode component by anode tube cylindraceous 1, be fixed on radial a plurality of anode blades 11 and the big commissure ring 12 on the inner wall surface of anode tube 1, little commissure ring 13 is formed; Cathode assembly 2 is the helicoidal structure with the coaxial assembling of above-mentioned anode; Constitute flux circuit components at taper magnetic pole of on above-mentioned anode component direction of principal axis, installing 3 and the magnet that is installed in magnetic pole 3 outsides; Be separately installed with the output block of exporting as microwave power in the outside of said magnetic pole 3; Said output block comprises antenna 4, Can 5, output pottery 6, blast pipe 7 and antenna cap 8; Wherein antenna 4 one ends are connected with any blade 11 in the anode component; The other end passes the hole on the magnetic pole 3, and through Can 5 and output pottery 6, final and blast pipe 7 links together; Said blast pipe 7 lower ends are connected with stage shape metal shell structure body 14, and the said stage shape metal shell structure body 14 inside axially progression of ladder are 2; Said stage shape metal shell structure body 14 is that the two sections different-diameters of L and the cylinder of height connect and compose by effective electrical length, and its effective electrical length L is in 0.10 λ ~ 0.2 λ scope, and wherein λ is a magnetron pi-mode oscillation wavelength; In Fig. 3, said effective electrical length L=a+b+c+d+h2.
Above-mentioned stage shape metal shell structure body 14 inner step height h1 axially is 3 ~ 6mm; Reaching the flange height h2 that is connected with output pottery 6 is 1 ~ 3mm, and the maximum of the cylindrical portion diameter d r1 of stage shape metal shell structure body 14 is dr1≤0.95dr2 with the relation of the ceramic 6 inside diameter dr2 of output.
It is below the 6.5mm that above-mentioned blast pipe is cut off director's degree La.
As shown in Figure 5, in actual use, from exporting pottery 6 to antenna cap 8 and be attached thereto the antenna that connects 4 and form incentive probes, extend in the rectangular waveguide 10 in the output block, realize the impedance conversion transition of 10 of output antenna 4 and the rectangular waveguides of magnetron.The length that output block stretches in the metal rectangular waveguide 10 is 10 ~ 13mm, and insulation distance is more than the 7.5mm, and the sectional dimension of metal rectangular waveguide 10 is 20.2mm.Obviously, the magnetron output block can be realized being used for the waveguide of reduced size, thereby can reach the purpose of device miniaturization on the basis that does not influence magnetron delivery efficiency and stability; Can when realizing the waveguide dimensions miniaturization, satisfy the requirement of breakdown strength in the waveguide, magnetron can steady operation in the 5.8GHz frequency range, and transmission frequency bandwidth is in the 300MHz scope time, its load standing-wave ratio is below 1.25.
Embodiment two:
As shown in Figure 4, the difference of present embodiment and embodiment one is that the said stage shape metal shell structure body 14 inside axially progression of ladder are 3; Said stage shape metal shell structure body 14 is that the three sections different-diameters of L and the cylinder of height connect and compose by effective electrical length.

Claims (4)

1. the magnetron that can realize the microwave equipment miniaturization; Comprise anode component, cathode assembly (2), output block and flux circuit components, anode component is made up of anode tube cylindraceous (1), radial a plurality of anode blades (11) and the big commissure ring (12), the little commissure ring (13) that are fixed on the inner wall surface of anode tube (1); Cathode assembly (2) is the helicoidal structure with the coaxial assembling of above-mentioned anode; Constitute flux circuit components at taper magnetic pole of on above-mentioned anode component direction of principal axis, installing (3) and the magnet that is installed in the magnetic pole outside; Be separately installed with the output block of exporting as microwave power in the outside of said magnetic pole (3); Said output block comprises antenna (4), Can (5), output pottery (6), blast pipe (7) and antenna cap (8); Wherein antenna (4) one ends are connected with any blade (11) in the anode component, and the other end passes the hole on the magnetic pole (3), through Can (5) and output pottery (6); Final and blast pipe (7) links together; It is characterized in that said blast pipe (7) lower end is connected with stage shape metal shell structure body (14), said stage shape metal shell structure body (14) is that at least two sections different-diameters of L and the cylinder of height connect and compose by effective electrical length; Its effective electrical length L is in 0.10 λ ~ 0.2 λ scope, and wherein λ is a magnetron pi-mode oscillation wavelength.
2. the magnetron of realizing the microwave equipment miniaturization according to claim 1 is characterized in that, the inner progression of ladder axially of said stage shape metal shell structure body (14) is more than 2.
3. the magnetron of realizing the microwave equipment miniaturization according to claim 1 and 2; It is characterized in that; Above-mentioned stage shape metal shell structure body (14) inner step height h1 axially is 3 ~ 6mm; Reaching the flange height h2 that is connected with output pottery (6) is 1 ~ 3mm, and the maximum of the cylindrical portion diameter d r1 of stage shape metal shell structure body (14) is dr1≤0.95dr2 with the relation of ceramic (6) the inside diameter dr2 of output.
4. the magnetron of realizing the microwave equipment miniaturization according to claim 3 is characterized in that, it is below the 6.5mm that said blast pipe (7) is cut off director's degree La.
CN2011202791678U 2011-08-03 2011-08-03 Magnetron capable of realizing miniaturization of microwave equipment Withdrawn - After Issue CN202205694U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202791678U CN202205694U (en) 2011-08-03 2011-08-03 Magnetron capable of realizing miniaturization of microwave equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202791678U CN202205694U (en) 2011-08-03 2011-08-03 Magnetron capable of realizing miniaturization of microwave equipment

Publications (1)

Publication Number Publication Date
CN202205694U true CN202205694U (en) 2012-04-25

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102339711A (en) * 2011-08-03 2012-02-01 广东威特真空电子制造有限公司 Magnetron capable of realizing miniaturization of microwave equipment
CN107093540A (en) * 2016-12-15 2017-08-25 中国工程物理研究院应用电子学研究所 A kind of relativistic magnetron of multiple antennas coupling-out structure

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102339711A (en) * 2011-08-03 2012-02-01 广东威特真空电子制造有限公司 Magnetron capable of realizing miniaturization of microwave equipment
CN102339711B (en) * 2011-08-03 2013-07-31 广东威特真空电子制造有限公司 Magnetron capable of realizing miniaturization of microwave equipment
CN107093540A (en) * 2016-12-15 2017-08-25 中国工程物理研究院应用电子学研究所 A kind of relativistic magnetron of multiple antennas coupling-out structure
CN107093540B (en) * 2016-12-15 2018-10-02 中国工程物理研究院应用电子学研究所 A kind of relativistic magnetron of multiple antennas coupling-out structure

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AV01 Patent right actively abandoned

Granted publication date: 20120425

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