CN114389008A - Multi-mode leaky-wave antenna array structure of microwave heating device - Google Patents
Multi-mode leaky-wave antenna array structure of microwave heating device Download PDFInfo
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- CN114389008A CN114389008A CN202111561319.8A CN202111561319A CN114389008A CN 114389008 A CN114389008 A CN 114389008A CN 202111561319 A CN202111561319 A CN 202111561319A CN 114389008 A CN114389008 A CN 114389008A
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- rectangular
- microwave heating
- wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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Abstract
The invention provides a multi-mode leaky-wave antenna array structure of a microwave heating device, which comprises a microwave heating assembly and a leaky-wave antenna mechanism, wherein the microwave heating assembly comprises a material body, a connecting plate, a rectangular metal block and an E-T distributor; the leaky-wave antenna mechanism comprises a connecting pipe, a longitudinal rectangular waveguide, a metal tuner and a long and thin slot; according to the invention, the four rectangular metal blocks are used for radiating microwave energy to the upper surface and the lower surface of the material body simultaneously, so that the material body is heated more uniformly, meanwhile, the effective radiation surface of the leaky-wave antenna is far larger than that of a common slot antenna, so that the material can be completely covered by the radiated microwave, the microwave can be fully absorbed by the material and converted into heat energy, the available bandwidth of equipment is greatly widened, the sensitivity of the equipment to the material characteristics is reduced, the utilization rate of energy is ensured, the working efficiency is improved, and the waste of resources is avoided.
Description
Technical Field
The invention relates to the technical field of microwave heating, in particular to a multi-mode leaky-wave antenna array structure of a microwave heating device.
Background
The microwave heating is the result of the interaction between polar molecules in the material and a microwave electromagnetic field, under the action of the external alternating electromagnetic field, the polar molecules in the material are polarized and change along with the change of the polarity of the external alternating electromagnetic field, and a plurality of polar molecules are frequently subjected to friction loss with each other, so that electromagnetic energy is converted into heat energy, and the material is heated;
when the traditional microwave heating equipment is used, as the dielectric constants and the losses of different materials have great differences, the shapes and the sizes of different materials are different, so that the microwave heating device needs to be retuned by using a tuning device at the input end of the microwave heating device after the heated materials are replaced, otherwise, in the microwave heating process, microwaves with a large proportion are reflected back and are not absorbed by the materials, the utilization rate of energy is further influenced, the working efficiency is influenced, and the waste of resources is caused.
Disclosure of Invention
In view of the above, it is desirable to provide a multi-mode leaky-wave antenna array structure of a microwave heating apparatus, so as to solve or alleviate the technical problems in the prior art, and to provide at least a beneficial choice.
The technical scheme of the embodiment of the invention is realized as follows: a multi-mode leaky-wave antenna array structure of a microwave heating device comprises a microwave heating assembly and a leaky-wave antenna mechanism, wherein the microwave heating assembly comprises a material body, a connecting plate, a rectangular metal block and an E-T distributor;
the leaky-wave antenna mechanism comprises a connecting pipe, a longitudinal rectangular waveguide pipe, a metal tuner, a slender slot, a horn-shaped gradient waveguide pipe and a triangular tuner;
the improved structure of the LED lamp is characterized in that a connecting plate is arranged in the middle of the outer side wall of the object body, the outer side wall of the object body is connected to the inner side wall of the connecting plate in a sliding mode, two rectangular metal blocks are symmetrically arranged on the upper surface and the lower surface of the connecting plate, long and thin gaps are evenly formed in the lower surfaces of the two rectangular metal blocks, one side of each rectangular metal block is communicated with a horn-shaped gradual change waveguide tube, one end of each horn-shaped gradual change waveguide tube is communicated with a connecting pipe, an E-T two distributor is arranged on the front surface of the connecting plate, a triangular tuner is fixedly connected to the middle of the inner side wall of the E-T two distributor, and a metal tuner is arranged on one side of the E-T two distributor.
Further preferably, the middle part of the front surface of the two E-T distributors is communicated with a longitudinal rectangular waveguide tube, and the outer side wall of the metal tuner is installed on the inner side wall of the longitudinal rectangular waveguide tube; the radiated microwaves are guided into the interior of the E-T secondary distributor through a longitudinal rectangular waveguide.
Preferably, the lower surface of the rectangular metal block is uniformly communicated with a wave guide tube, and one end of the wave guide tube penetrates through the inner side wall of the connecting plate; the radiation microwaves are guided out through the wave guide tube to heat the material body.
Preferably, two ends of the E-T second distributor are provided with distributor outlets, and the inner side wall of the rectangular metal block is provided with a rectangular metal cavity; and the radiated microwaves are guided into the rectangular metal cavity of the rectangular metal block through the horn-shaped gradient waveguide tube.
Preferably, one end of the connecting pipe is communicated with a second rectangular wave direction changing pipe; the second rectangular wave turning pipe is more convenient to be communicated with one end of the horn-shaped gradual change waveguide pipe through the connecting pipe.
Preferably, one end of the second rectangular wave turning pipe, which is far away from the connecting pipe, is communicated with a first rectangular wave turning pipe; the radiation microwaves are guided into the second rectangular wave turning tube through the first rectangular wave turning tube.
Preferably, one end, far away from the second rectangular wave turning pipe, of the first rectangular wave turning pipe is communicated with an H-T second distributor, and the middle of one side of the H-T second distributor is communicated with a guide pipe; the radiation micro-waves in the guide pipe flow into the two first rectangular wave diversion pipes through the H-T two distributors.
Preferably, one end of the flow guide pipe is communicated with one end of the E-T distributor through the distributor outlet; the radiated microwaves are directed into the draft tube through the distributor outlet by an E-T distributor.
Due to the adoption of the technical scheme, the embodiment of the invention has the following advantages: according to the invention, the four rectangular metal blocks are used for radiating microwave energy to the upper surface and the lower surface of the material body simultaneously, so that the material body is heated more uniformly, meanwhile, the effective radiation surface of the leaky-wave antenna is far larger than that of a common slot antenna, so that the material can be completely covered by the radiated microwave, the microwave can be fully absorbed by the material and converted into heat energy, the available bandwidth of equipment is greatly widened, the sensitivity of the equipment to the material characteristics is reduced, the utilization rate of energy is ensured, the working efficiency is improved, and the waste of resources is avoided.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and following detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or technical descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic bottom view of a rectangular metal block according to the present invention;
FIG. 3 is a schematic cross-sectional view of FIG. 3 according to the present invention;
FIG. 4 is a schematic cross-sectional view of an E-T dual dispenser of the present invention;
FIG. 5 is a graph of the reflection loss of materials of different dielectric constant/loss in the present invention when heated.
Reference numerals: 1. a microwave heating assembly; 2. a leaky-wave antenna mechanism; 101. a body of material; 103. a connecting plate; 104. a rectangular metal block; 105. E-T two distributors; 201. a connecting pipe; 202. a longitudinal rectangular waveguide; 203. a metal tuner; 204. an elongated slit; 205. a horn-shaped tapered waveguide; 206. a triangular tuner; 41. a first rectangular wave deflection tube; 42. an H-T two distributor; 43. a flow guide pipe; 44. a wave guide tube; 45. a second rectangular wave deflecting tube; 46. a rectangular metal cavity; 47. an outlet of the distributor.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 4, the embodiment of the present invention provides a leaky-wave antenna array structure for multiple modes of a microwave heating apparatus, including a microwave heating assembly 1 and a leaky-wave antenna mechanism 2, where the microwave heating assembly 1 includes a material body 101, a connecting plate 103, a rectangular metal block 104, and an E-T distributor 105;
the leaky wave antenna mechanism 2 includes a connection pipe 201, a longitudinal rectangular waveguide 202, a metal tuner 203, an elongated slot 204, a horn-shaped tapered waveguide 205, and a triangular tuner 206;
the middle part of the outer side wall of the material body 101 is provided with a connecting plate 103, the outer side wall of the material body 101 is connected to the inner side wall of the connecting plate 103 in a sliding manner, two rectangular metal blocks 104 are symmetrically arranged on the upper surface and the lower surface of the connecting plate 103, elongated gaps 204 are uniformly formed in the lower surfaces of the two rectangular metal blocks 104, one side of each rectangular metal block 104 is communicated with a horn-shaped gradual change waveguide tube 205, one end of each horn-shaped gradual change waveguide tube 205 is communicated with a connecting pipe 201, the front surface of the connecting plate 103 is provided with an E-T distributor 105, the middle part of the inner side wall of the E-T distributor 105 is fixedly connected with a triangular tuner 206, and one side of the E-T distributor 105 is provided with a metal tuner 203.
The invention consists of a horn-shaped tapered waveguide 205, a rectangular metal cavity 46 and N (N is more than or equal to 3) slender slots 204 on one wide side surface of the rectangular metal cavity as shown in FIG. 5; the smaller opening surface of the horn-shaped tapered waveguide 205 serves as an input end, and the larger opening surface serves as an output end and is connected with the rectangular metal cavity 46; the width of the metal cavity 46 is within an m lambda- (m + 1) lambda interval (m is more than or equal to 2, lambda is the wavelength), and microwaves are distributed in a multi-mode mainly in a TEm0 mode in the metal cavity; the length of the elongated slot 204 is much greater than 1 microwave wavelength; the length direction of the elongated slot 204 is perpendicular to the axial direction of the metal cavity; the spacing between the elongated slots 204 may or may not be equal.
In one embodiment, the middle of the front surface of the E-T distributor 105 is connected to the longitudinal rectangular waveguide 202, and the outer sidewall of the metal tuner 203 is mounted on the inner sidewall of the longitudinal rectangular waveguide 202; the radiated microwaves are guided into the interior of the E-T distributor 105 through a longitudinal rectangular waveguide 202.
In one embodiment, the lower surface of the rectangular metal block 104 is uniformly communicated with the guided wave tube 44, and one end of the guided wave tube 44 penetrates through the inner side wall of the connecting plate 103; the radiation microwaves are guided out by the guided wave tube 44 to heat the material body 101, so that the material body 101 is heated more uniformly.
In one embodiment, both ends of the E-T distributor 105 are opened with distributor outlets 47, and the inner side wall of the rectangular metal block 104 is opened with rectangular metal cavities 46; the radiated microwaves are guided into the rectangular metal cavity 46 of the rectangular metal block 104 through the horn-shaped graded waveguide 205.
In one embodiment, one end of the connecting pipe 201 is communicated with a second rectangular wave direction changing pipe 45; the second rectangular-wave changing pipe 45 is more conveniently communicated with one end of the flared graded waveguide 205 through the connection pipe 201.
In one embodiment, one end of the second rectangular wave changing pipe 45 away from the connecting pipe 201 is communicated with the first rectangular wave changing pipe 41; the radiated microwaves are guided into the second rectangular-wave redirecting tube 45 through the first rectangular-wave redirecting tube 41.
In one embodiment, one end of the first rectangular wave diversion pipe 41 far away from the second rectangular wave diversion pipe 45 is communicated with an H-T second distributor 42, and the middle part of one side of the H-T second distributor 42 is communicated with a diversion pipe 43; the radiation microwaves in the flow guide pipe 43 flow into the two first rectangular wave diversion pipes 41 through the H-T two distributors 42.
In one embodiment, one end of the flow conduit 43 is in communication with one end of the E-T distributor 105 through the distributor outlet 47; the radiated microwaves are directed into the flow guide tube 43 through the distributor outlet 47 by the E-T double distributor 105.
The invention is in operation: the invention inserts the object body 101 into the connecting plate 103, then introduces the radiation microwave into the E-T distributor 105 through the longitudinal rectangular waveguide 202, then divides the radiation microwave through the triangular tuner 206, then introduces the radiation microwave into the guide pipe 43 through the distributor outlet 47, then introduces the radiation microwave in the guide pipe 43 into two first rectangular waveguide 41 through the H-T second distributor 42, then introduces the radiation microwave into the second rectangular waveguide 45 through the first rectangular waveguide 41, then introduces the radiation microwave into the trumpet-shaped graded waveguide 205 through the connecting pipe 201, makes the second rectangular waveguide 45 more conveniently communicated with one end of the trumpet-shaped graded waveguide 205 through the connecting pipe 201, then introduces the radiation microwave into the rectangular metal cavity 46 of the rectangular metal block 104 through the trumpet-shaped graded waveguide 205, then the radiation microwaves in the rectangular metal block 104 are guided into the wave guide tube 44 through the elongated gap 204, and then the radiation microwaves are guided out through the wave guide tube 44 to heat the material body 101, so that the material body 101 is heated more uniformly, the length of the elongated gap 204 is far larger than one microwave wavelength, and the effective radiation surface of the leaky-wave antenna is far larger than that of a common gap antenna, so that the material can be completely covered by the radiation microwaves, the microwaves can be fully absorbed by the material and converted into heat energy, the available bandwidth of the equipment is greatly widened, and the sensitivity of the equipment to the material characteristics is reduced.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The utility model provides a microwave heating device's multi-mode leaky-wave antenna array structure, includes microwave heating subassembly (1) and leaky-wave antenna mechanism (2), its characterized in that: the microwave heating assembly (1) comprises a material body (101), a connecting plate (103), a rectangular metal block (104) and an E-T two distributor (105);
the leaky-wave antenna mechanism (2) comprises a connecting pipe (201), a longitudinal rectangular waveguide (202), a metal tuner (203), a slender slot (204), a horn-shaped gradient waveguide (205) and a triangular tuner (206);
a connecting plate (103) is arranged in the middle of the outer side wall of the object body (101), the outer side wall of the object body (101) is connected with the inner side wall of the connecting plate (103) in a sliding manner, the upper surface and the lower surface of the connecting plate (103) are symmetrically provided with two rectangular metal blocks (104), the lower surfaces of the two rectangular metal blocks (104) are uniformly provided with elongated gaps (204), one side of the rectangular metal block (104) is communicated with a horn-shaped gradual change waveguide tube (205), one end of the horn-shaped gradual change waveguide tube (205) is communicated with a connecting tube (201), the front surface of the connecting plate (103) is provided with two E-T distributors (105), the middle part of the inner side wall of the E-T two distributor (105) is fixedly connected with a triangular tuner (206), one side of the E-T two-divider (105) is provided with a metal tuner (203).
2. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 1, wherein: the middle part of the front surface of the two E-T distributors (105) is communicated with a longitudinal rectangular waveguide tube (202), and the outer side wall of the metal tuner (203) is installed on the inner side wall of the longitudinal rectangular waveguide tube (202).
3. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 1, wherein: the lower surface of the rectangular metal block (104) is uniformly communicated with a wave-guiding tube (44), and one end of the wave-guiding tube (44) penetrates through the inner side wall of the connecting plate (103).
4. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 1, wherein: two ends of the two E-T distributors (105) are provided with distributor outlets (47), and the inner side wall of the rectangular metal block (104) is provided with a rectangular metal cavity (46).
5. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 4, wherein: one end of the connecting pipe (201) is communicated with a second rectangular wave direction changing pipe (45).
6. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 5, wherein: one end, far away from the connecting pipe (201), of the second rectangular wave turning pipe (45) is communicated with a first rectangular wave turning pipe (41).
7. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 6, wherein: one end, far away from the second rectangular wave turning pipe (45), of the first rectangular wave turning pipe (41) is communicated with an H-T second distributor (42), and the middle of one side of the H-T second distributor (42) is communicated with a guide pipe (43).
8. The multi-mode leaky-wave antenna array structure of a microwave heating apparatus as claimed in claim 7, wherein: one end of the guide pipe (43) is communicated with one end of the E-T two distributors (105) through the distributor outlet (47).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561319.8A CN114389008A (en) | 2021-12-20 | 2021-12-20 | Multi-mode leaky-wave antenna array structure of microwave heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111561319.8A CN114389008A (en) | 2021-12-20 | 2021-12-20 | Multi-mode leaky-wave antenna array structure of microwave heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114389008A true CN114389008A (en) | 2022-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111561319.8A Pending CN114389008A (en) | 2021-12-20 | 2021-12-20 | Multi-mode leaky-wave antenna array structure of microwave heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114389008A (en) |
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2021
- 2021-12-20 CN CN202111561319.8A patent/CN114389008A/en active Pending
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