CN111816968A - Slow wave gap waveguide based on periodic broken nail structure - Google Patents
Slow wave gap waveguide based on periodic broken nail structure Download PDFInfo
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- CN111816968A CN111816968A CN202010558441.9A CN202010558441A CN111816968A CN 111816968 A CN111816968 A CN 111816968A CN 202010558441 A CN202010558441 A CN 202010558441A CN 111816968 A CN111816968 A CN 111816968A
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- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/12—Hollow waveguides
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Abstract
The invention relates to a slow wave slot waveguide based on a periodic broken nail structure. The invention belongs to the technical field of microwave device engineering, and the waveguide comprises: the device comprises a top metal plate, a slot waveguide metal side wall, a bottom metal plate, a slot waveguide and periodic broken nails; the bottom metal plate is provided with a slot waveguide and periodic broken nails, the slot waveguide is positioned at two ends of the bottom metal plate, and two ends of the periodic broken nails are connected with the slot waveguide positioned at two ends of the bottom metal plate; the gap waveguide comprises a standard gap waveguide and a slow wave band, the slow wave band is close to two ends of the periodic broken nails, the standard gap waveguide is connected with the slow wave band, and the slow wave band is connected with the periodic broken nails; the bottom metal plate is provided with slot waveguide metal side walls along two sides, and the top metal plate is arranged at the upper end of each slot waveguide metal side wall. The slow wave coefficient of the invention in the working frequency band can be flexibly regulated and controlled, and the invention has the obvious advantages of simple design scheme and high efficiency.
Description
Technical Field
The invention relates to the technical field of microwave device engineering, in particular to a slow wave slot waveguide based on a periodic broken nail structure.
Background
With the continuous development of modern communication and radar technologies, the requirements on indexes such as transmission loss, power capacity and electromagnetic interference of a radio frequency guided wave structure are continuously improved. Traditional planar transmission lines such as microstrip lines, coplanar waveguide transmission lines, slot lines and the like are realized by adopting a dielectric substrate with certain loss as a carrier, so that the traditional planar transmission lines have larger insertion loss; although the traditional waveguide structure has the advantages of low loss and large power capacity, the problem of poor contact of metal walls often exists in the processing and manufacturing process, and the structural problem can cause obvious electromagnetic leakage and radio frequency interference and seriously affect the effective transmission of radio frequency signals. To the above problem, the scholars have proposed the slot waveguide structure, and this guided wave structure not only has the advantage that the loss is low and power capacity is big, and structural stability is strong moreover, introduces the slot structure, has solved the problem of traditional waveguide metal wall contact failure.
Due to the presently proposed slot waveguide and TE10The mode is used as a fundamental mode for signal transmission, so that the existing slot waveguide shows typical fast wave characteristics. However, radio frequency signals with slow wave characteristics are often required in practical engineering applications, which greatly limits or even prevents the application scenarios of the slot waveguide.
Disclosure of Invention
The invention provides a slow wave slot waveguide based on a periodic broken nail structure, which aims to design a slow wave slot waveguide with slow wave characteristics and a slow wave coefficient which can be flexibly regulated and controlled according to requirements so as to improve the application scene of the slot waveguide in practical application, and the invention provides the following technical scheme:
a slow wave slot waveguide based on a periodic staple structure, the waveguide comprising: the device comprises a top metal plate, a slot waveguide metal side wall, a bottom metal plate, a slot waveguide and periodic broken nails;
the bottom metal plate is provided with a slot waveguide and periodic broken nails, the slot waveguide is positioned at two ends of the bottom metal plate, and two ends of the periodic broken nails are connected with the slot waveguide positioned at two ends of the bottom metal plate;
the gap waveguide comprises a standard gap waveguide and a slow wave band, the slow wave band is close to two ends of the periodic broken nails, the standard gap waveguide is connected with the slow wave band, and the slow wave band is connected with the periodic broken nails;
the bottom metal plate is provided with slot waveguide metal side walls along two sides, and the top metal plate is arranged at the upper end of each slot waveguide metal side wall.
Preferably, the slow wave band employs beveled cut staples.
Preferably, the height of the chamfered broken nails is realized by adopting a linear transformation of f ═ kx, and the slope k ranges from 0.1 to 0.4.
Preferably, the periodic broken nails are formed by periodically arranging rectangular broken nail structures, and the value range of the length a of each rectangular broken nail structure is 0.06 lambda0≤a≤0.1λ0The value range of the length b of the rectangular broken nail structure is 0.06 lambda0≤b≤0.1λ0Height h of the rectangular staple structure3Has a value range of 0.1 lambda0≤h3≤0.3λ0，λ0The wavelength corresponding to the working center frequency.
Preferably, the horizontal distance d between adjacent rectangular staples1The value range is 0.08 lambda0≤d1≤0.12λ0Perpendicular distance d between adjacent rectangular staples3The value range is 0.08 lambda0≤d3≤0.12λ0。
Preferably, the top and bottom metal plates are of the same thickness.
Preferably, the metal side walls of the slot waveguide are formed by metal posts which are arranged periodically, and the distance d between every two adjacent metal posts2Is less than 0.1 lambda0。
The invention has the following beneficial effects:
compared with the existing slot waveguide, the slot waveguide has the following prominent advantages: the structure has remarkable slow wave characteristics in the working frequency band range, and can effectively realize the miniaturization and high integration of devices; secondly, the slow wave coefficient of the slot waveguide in the working frequency band can be flexibly regulated and controlled, and the slot waveguide has the remarkable advantages of simple design scheme and high efficiency.
Drawings
FIG. 1 is a three-dimensional view of a slow wave slot waveguide based on a periodic staple structure;
FIG. 2 is a top view of a slow wave slot waveguide based on a periodic staple structure;
FIG. 3 is a cross-sectional view of a slow wave slot waveguide based on a periodic staple structure;
FIG. 4 is a simulation comparison graph of phase characteristics of a slow wave slot waveguide and a standard slot waveguide;
FIG. 5 is a diagram of simulation results of slow-wave coefficients of the slow-wave slot waveguide.
Detailed Description
The present invention will be described in detail with reference to specific examples.
The first embodiment is as follows:
according to fig. 1 to 3, the present invention provides a slow wave slot waveguide based on a periodic staple structure, the waveguide including: the device comprises a top metal plate, a slot waveguide metal side wall, a bottom metal plate, a slot waveguide and periodic broken nails;
the bottom metal plate is provided with a slot waveguide and periodic broken nails, the slot waveguide is positioned at two ends of the bottom metal plate, and two ends of the periodic broken nails are connected with the slot waveguide positioned at two ends of the bottom metal plate;
the gap waveguide comprises a standard gap waveguide and a slow wave band, the slow wave band is close to two ends of the periodic broken nails, the standard gap waveguide is connected with the slow wave band, and the slow wave band is connected with the periodic broken nails;
the bottom metal plate is provided with slot waveguide metal side walls along two sides, and the top metal plate is arranged at the upper end of each slot waveguide metal side wall.
Along the propagation direction of radio frequency signals, the whole slow wave gap waveguide is composed of a standard gap waveguide section, a transition section and periodic broken nails
Length of standard slot waveguide segment is l1The width and height of the board are w x h2The gap height is h1(ii) a The transition section part is used for connecting the standard gap waveguide section and the slow wave section to realize impedance matching and mode matching from fast wave transmission to slow wave transmission, and the whole length of the transition section part is l2The height of the broken nails in the part is realized by linear transformation of f ═ kx, and the value range of the slope k is 0.1-0.4; the periodic broken nails are formed by periodically arranging rectangular broken nail structures, and the length, width and height of the rectangular broken nail structures are a multiplied by b multiplied by h3The value ranges are respectively 0.06 lambda0≤a≤0.1λ0，0.06λ0≤b≤0.1λ0，0.1λ0≤h3≤0.3λ0Wherein λ is0Is the frequency of the working centerThe wavelength of interest. In addition, the horizontal and vertical spacing between two adjacent broken nails is d1And d3The value ranges are respectively 0.08 lambda0≤d1≤0.12λ0And 0.08. lambda.0≤d3≤0.12λ0. Through such design for form great equivalent capacitance between nail layer metal sheet structure and the periodic metal nail structure, thereby realize slow wave transmission characteristic.
By adjusting the height h of the metal nail structure3Therefore, the flexible regulation and control of the slow wave coefficient can be realized. In addition, the thicknesses of the metal plates of the top layer and the bottom layer are t, the side wall of the waveguide between the two metal plates is formed by metal columns which are arranged periodically, the size of each metal column in the structure is m multiplied by n, and the distance between the two metal columns is d2To prevent leakage of electromagnetic energy, d2The value is generally less than 0.1 lambda0。
The second embodiment is as follows:
a slow wave slot waveguide working in a Ku frequency band is designed. Referring to fig. 1, the specific structural parameter of the slow wave slot waveguide is w is 18.8mm, d1＝2.56mm，d2＝1.50mm，d3＝1.71mm，a＝2.00mm，b＝2.00mm，m＝1.50mm，n＝1.50mm，l1＝10.50mm，l2＝12.50mm，l3＝43.10mm，t＝1.00mm，h1＝0.50mm，h26.50mm and h34.00 mm. Based on the above structural parameters, simulation results of the slow wave slot waveguide are shown in fig. 4 and 5. As can be seen from fig. 4, the proposed slow wave slot waveguide has a larger wave number in the frequency range of 11-14.5GHz than a standard slot waveguide of the same length, thereby proving that the proposed slow wave slot waveguide has a larger transmission electrical length than the standard slot waveguide. In addition, as shown in fig. 5, the slow-wave coefficient simulation result of the slow-wave slot waveguide shows that the slow-wave coefficient of the slow-wave slot waveguide reaches 1.05-1.47 in the working frequency range of 11-14.5GHz, so that the purpose that the slow-wave transmission of electromagnetic signals can be effectively realized by the slow-wave slot waveguide is finally proved.
The above description is only a preferred embodiment of the slow-wave slot waveguide based on the periodic broken nail structure, and the protection range of the slow-wave slot waveguide based on the periodic broken nail structure is not limited to the above embodiments, and all technical solutions belonging to the idea belong to the protection range of the present invention. It should be noted that modifications and variations which do not depart from the gist of the invention will be those skilled in the art to which the invention pertains and which are intended to be within the scope of the invention.
Claims (7)
1. The utility model provides a slow wave gap waveguide based on garrulous nail structure of cycle which characterized in that: the waveguide includes: the device comprises a top metal plate, a slot waveguide metal side wall, a bottom metal plate, a slot waveguide and periodic broken nails;
the bottom metal plate is provided with a slot waveguide and periodic broken nails, the slot waveguide is positioned at two ends of the bottom metal plate, and two ends of the periodic broken nails are connected with the slot waveguide positioned at two ends of the bottom metal plate;
the gap waveguide comprises a standard gap waveguide and a slow wave band, the slow wave band is close to two ends of the periodic broken nails, the standard gap waveguide is connected with the slow wave band, and the slow wave band is connected with the periodic broken nails;
the bottom metal plate is provided with slot waveguide metal side walls along two sides, and the top metal plate is arranged at the upper end of each slot waveguide metal side wall.
2. The slow wave slot waveguide based on the periodic staple structure of claim 1, wherein: the slow wave band adopts oblique cutting type broken nails.
3. The slow wave slot waveguide based on the periodic staple structure of claim 2, wherein: the height of the oblique cutting type broken nail is realized by linear transformation of f ═ kx, and the value range of the slope k is 0.1-0.4.
4. The slow wave slot waveguide based on the periodic staple structure of claim 1, wherein: the periodic broken nails are formed by periodically arranging rectangular broken nail structures, and the value range of the length a of each rectangular broken nail structure is 0.06 lambda0≤a≤0.1λ0The value range of the length b of the rectangular broken nail structure is 0.06 lambda0≤b≤0.1λ0Height h of the rectangular staple structure3Has a value range of 0.1 lambda0≤h3≤0.3λ0，λ0The wavelength corresponding to the working center frequency.
5. The slow wave slot waveguide based on the periodic staple structure of claim 4, wherein: horizontal distance d between adjacent rectangular broken nails1The value range is 0.08 lambda0≤d1≤0.12λ0Perpendicular distance d between adjacent rectangular staples3The value range is 0.08 lambda0≤d3≤0.12λ0。
6. The slow wave slot waveguide based on the periodic staple structure of claim 1, wherein: the top metal plate and the bottom metal plate have the same thickness.
7. The slow wave slot waveguide based on the periodic staple structure of claim 1, wherein: the metal side wall of the slot waveguide is formed by metal columns which are periodically arranged, and the distance d between every two adjacent metal columns2Is less than 0.1 lambda0。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436248A (en) * | 2020-11-02 | 2021-03-02 | 哈尔滨工业大学 | High phase shift tuning rate liquid crystal phase shifter based on dielectric integrated waveguide |
| CN114069172A (en) * | 2021-10-09 | 2022-02-18 | 西安电子科技大学 | Miniaturized non-contact low-passive intermodulation waveguide filter, design method and application |
| WO2023070522A1 (en) * | 2021-10-29 | 2023-05-04 | 京东方科技集团股份有限公司 | Antenna device and manufacturing method therefor, control method, and electronic device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436248A (en) * | 2020-11-02 | 2021-03-02 | 哈尔滨工业大学 | High phase shift tuning rate liquid crystal phase shifter based on dielectric integrated waveguide |
| CN112436248B (en) * | 2020-11-02 | 2022-02-22 | 哈尔滨工业大学 | High phase shift tuning rate liquid crystal phase shifter based on dielectric integrated waveguide |
| CN114069172A (en) * | 2021-10-09 | 2022-02-18 | 西安电子科技大学 | Miniaturized non-contact low-passive intermodulation waveguide filter, design method and application |
| WO2023070522A1 (en) * | 2021-10-29 | 2023-05-04 | 京东方科技集团股份有限公司 | Antenna device and manufacturing method therefor, control method, and electronic device |
| EP4340129A4 (en) * | 2021-10-29 | 2024-07-17 | Boe Technology Group Co Ltd | Antenna device and manufacturing method therefor, control method, and electronic device |
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