CN217035944U - Spread spectrum waveguide coaxial converter - Google Patents
Spread spectrum waveguide coaxial converter Download PDFInfo
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- CN217035944U CN217035944U CN202220615760.3U CN202220615760U CN217035944U CN 217035944 U CN217035944 U CN 217035944U CN 202220615760 U CN202220615760 U CN 202220615760U CN 217035944 U CN217035944 U CN 217035944U
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Abstract
The utility model discloses a spread spectrum waveguide coaxial converter, and relates to the technical field of waveguide conversion devices. The converter comprises an upper cavity and a lower cavity, a waveguide cavity is formed between the upper cavity and the lower cavity, and a plurality of bosses are formed in the waveguide cavity. One end of the waveguide cavity is closed, the other end of the waveguide cavity is provided with an opening, and the distance between the lower surface of the upper cavity close to one side of the opening and the upper surface of the lower cavity is gradually increased, so that the height of the opening is gradually increased. The coaxial converter has the advantages of good spread spectrum performance, wide working frequency band and the like.
Description
Technical Field
The utility model relates to the technical field of waveguide conversion devices, in particular to a spread spectrum waveguide coaxial converter with good spread spectrum performance.
Background
The waveguide coaxial converter plays an important role in the microwave field, and mainly realizes the mutual conversion between a coaxial signal and a waveguide signal. The coaxial inner conductor (the connector extends into the waveguide cavity) can be regarded as a probe in the waveguide, and the essence of energy exchange between the probe and the waveguide is the excitation process of the probe in the waveguide. In a waveguide, the insertion of a probe causes discontinuities and thus creates an infinite number of higher order modes. And only a main mode can be transmitted in the waveguide, and a high-order mode which cannot be transmitted can be gathered around the probe to generate a reactance effect, so that the spread spectrum performance is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a spread spectrum waveguide coaxial converter with good spread spectrum performance and wide working frequency band.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a spread spectrum waveguide coaxial converter, characterized by: the waveguide cavity is formed between the upper cavity and the lower cavity, and a plurality of bosses are formed in the waveguide cavity; the converter also comprises a connector, wherein the connector is fixed on the upper cavity, and a coaxial inner conductor of the connector is inserted into a waveguide cavity formed between the upper cavity and the lower cavity; the converter further comprises a tuning screw, the tuning screw is located on the lower cavity, the end portion of the upper side of the tuning screw penetrates through the lower cavity and enters the waveguide cavity, and a nut is arranged at the end portion of the outer side of the tuning screw.
The further technical scheme is as follows: the bosses have different heights and/or diameters.
The further technical scheme is as follows: one end of the waveguide cavity is closed, an opening is formed in one end of the waveguide cavity, and the distance between the lower surface of the upper cavity close to one side of the opening and the upper surface of the lower cavity is gradually increased.
The further technical scheme is as follows: an inclined plane which inclines upwards is formed on the lower surface of the upper cavity from the middle part to the opening of the waveguide cavity, and an inclined plane which inclines downwards is formed on the upper surface of the lower cavity from the middle part to the opening of the waveguide cavity.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the converter is provided with the bosses in the waveguide cavity, the diameters and/or heights of the bosses can be different, impedance matching can be effectively adjusted, and the spread spectrum performance is optimized, so that the working frequency band is enlarged, and the working frequency is improved; the waveguide cavity of the converter is provided with inner surfaces with certain slopes at the upper part and the lower part of a transition section between the cavity and a standard output waveguide port (one end of the waveguide cavity is closed, the other end of the waveguide cavity is provided with an opening, the distance of the inner diameter of the cavity close to one side of the opening is gradually increased, so that the height of the opening is gradually increased), the spread spectrum performance is further optimized, the working frequency band is enlarged, the working frequency is improved, the working frequency band range of the converter can reach 24-50GHz, and the converter is very suitable for 5G millimeter wave related test application.
In addition, the cutoff frequency (low frequency) of the main mode of the rectangular waveguide is mainly influenced by the size of the long side, namely the side a of the rectangular waveguide, so that the size of the side b (the short side of the rectangular waveguide is the side b, and the narrow side b structure is realized by arranging inclined planes on the upper surface and the lower surface in the cavity) is reduced, and the influence on the cutoff frequency of the main mode of the waveguide is small; meanwhile, the narrow b-side structure can reduce the size of the mouth surface of the rectangular waveguide, change the length-width ratio of the rectangle and improve the cut-off frequency (high-frequency) of a higher-order mode to a certain extent, thereby achieving the purpose of expanding the bandwidth.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic perspective view of a converter according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of a converter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a right-view structure of a converter according to an embodiment of the present invention;
FIG. 4 is a schematic left side view of a converter according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a front view of a converter according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a transducer according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of the structure at B in FIG. 6;
FIG. 8 is a cross-sectional view along the line A-A in FIG. 6;
FIG. 9 is a schematic perspective view of an upper cavity of a converter according to an embodiment of the present invention;
fig. 10 is a schematic cross-sectional view of the upper cavity of the converter according to the embodiment of the present invention;
FIG. 11 is a schematic perspective view of a lower cavity of a transducer according to an embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view of a lower cavity of a transducer according to an embodiment of the present invention;
FIG. 13 is a schematic view of a structure of a lower cavity of a converter and a tuning screw according to an embodiment of the present invention;
FIG. 14 is a graph comparing the standing wave curves of the present invention and a standard waveguide;
FIG. 15 is a graph comparing the insertion loss curves of the present invention and a standard waveguide;
wherein: 1. an upper cavity; 2. a lower cavity; 3. a waveguide cavity; 4. a boss; 5. a connector; 6. a coaxial inner conductor; 7. a tuning screw; 8. a flange connection; 9. connecting holes; 10. and a nut.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 13, an embodiment of the present invention discloses a spread spectrum waveguide coaxial converter, which includes an upper cavity 1 and a lower cavity 2, where the upper cavity 1 and the lower cavity 2 are made of a metal material; a waveguide cavity 3 is formed between the upper cavity 1 and the lower cavity 2, and a plurality of bosses 4 are formed in the waveguide cavity 3.
Further, the bosses 4 have different heights and/or diameters, so the specific structure of the bosses 4 may have various forms, for example, the bosses 4 have the same diameter, or the bosses have different diameters, or the bosses have the same diameter and different portions, or the bosses have the same height, or the bosses have different heights, or the bosses have the same height and different portions, and so on.
Further, as shown in fig. 1 to 6, the converter further includes a connector 5, the connector is made of a metal material, the connector 5 is fixed on the upper cavity 1 for connecting with other components, and the coaxial inner conductor 6 of the connector 5 is inserted into the waveguide cavity 3 formed between the upper cavity 1 and the lower cavity 2.
Further, as shown in fig. 6, the converter further includes a tuning screw 7, the tuning screw 7 is located outside the lower cavity 2, an upper end of the tuning screw 7 penetrates through the lower cavity 2 and enters the waveguide cavity 3, a nut 10 is disposed at an outer end of the tuning screw 7, and a height of the tuning screw 7 entering the waveguide cavity 3 can be adjusted by adjusting the nut 10 as needed.
Further, as shown in fig. 6, 8 and 13, the upper end of the tuning screw 7 is located between the bosses 4; the positions of the bosses 4 on the upper surface of the lower cavity 2 can be regularly arranged or irregularly arranged.
Further, as shown in fig. 7, the boss 4 is located on the upper surface of the lower cavity 2, and there is a certain gap between the boss 4 and the coaxial inner conductor 6 inserted into the waveguide cavity 3 so that the coaxial inner conductor 6 does not contact the boss 4.
Further, as shown in fig. 6, one end of the waveguide cavity 3 is closed, and the other end has an opening, and the inner diameter of the waveguide cavity 3 near the opening is gradually increased, so that the height of the opening is gradually increased.
Preferably, an upwardly extending inclined surface is formed from the middle of the lower surface of the upper chamber 1 to the opening of the waveguide chamber 3, and a downwardly extending inclined surface is formed from the middle of the upper surface of the lower chamber 2 to the opening of the waveguide chamber 3.
Further, in order to facilitate connection of the converter with other components, as shown in fig. 9-13, a flange connection portion 8 is formed on the right side of the upper cavity 1 and the lower cavity 2, a connection hole 9 is formed on the flange connection portion 8, and the converter is connected to the standard output waveguide through the flange connection portion.
As shown in fig. 1-2 and 9 and 11, the upper chamber 1 and the lower chamber 2 are fixedly connected together by mutually matching screws and screw holes.
FIG. 14 is a graph comparing the standing wave curves of the present invention and a standard waveguide; FIG. 15 is a graph comparing the insertion loss curves of the present invention and a standard waveguide; it can be seen from the figure that the standing waves and insertion loss of the present application are lower and more stable.
The converter is provided with the bosses in the waveguide cavity, and the diameters and/or heights of the bosses can be different, so that impedance matching can be effectively adjusted, and the spread spectrum performance is optimized, thereby expanding the working frequency band and improving the working frequency; the waveguide cavity of the converter is provided with inner surfaces with certain slopes at the upper part and the lower part of a transition section between the cavity and a standard output waveguide port (one end of the waveguide cavity is closed, the other end of the waveguide cavity is provided with an opening, and the distance between the inner diameter of the cavity close to one side of the opening is gradually increased, so that the height of the opening is gradually increased), the spread spectrum performance is further optimized, the working frequency band is enlarged, the working frequency is improved, the working frequency band range of the converter can reach 24-50GHz, and the converter is very suitable for 5G millimeter wave related test application.
In addition, the cutoff frequency (low frequency) of the main mode of the rectangular waveguide is mainly influenced by the size of the long side, namely the side a of the rectangular waveguide, so that the size of the side b (the short side of the rectangular waveguide is the side b, and the narrow side b structure is realized by arranging inclined planes on the upper surface and the lower surface in the cavity) is reduced, and the influence on the cutoff frequency of the main mode of the waveguide is small; meanwhile, the narrow b-side structure can reduce the mouth face size of the rectangular waveguide, change the length-width ratio of the rectangle and improve the cut-off frequency (high-frequency) of a higher-order mode to a certain extent, thereby achieving the purpose of expanding the bandwidth.
Claims (8)
1. A spread spectrum waveguide coaxial converter, characterized by: the waveguide cavity comprises an upper cavity body (1) and a lower cavity body (2), a waveguide cavity body (3) is formed between the upper cavity body (1) and the lower cavity body (2), and a plurality of bosses (4) are formed in the waveguide cavity body (3); the converter further comprises a connector (5), wherein the connector (5) is fixed on the upper cavity (1), and a coaxial inner conductor (6) of the connector (5) is inserted into a waveguide cavity (3) formed between the upper cavity (1) and the lower cavity (2); the converter further comprises a tuning screw (7), the tuning screw (7) is located on the outer side of the lower cavity (2), the end portion of the upper side of the tuning screw (7) penetrates through the lower cavity (2) and enters the waveguide cavity (3), and a nut (10) is arranged at the end portion of the outer side of the tuning screw (7).
2. A spread spectrum waveguide coaxial converter as claimed in claim 1, wherein: the upper end of the tuning screw (7) is located between the bosses (4).
3. The spread spectrum waveguide coaxial converter according to claim 1, wherein: the bosses (4) are different in height and/or diameter.
4. The spread spectrum waveguide coaxial converter according to claim 1, wherein: the boss (4) is located on the upper surface of the lower cavity (2), and a gap is formed between the boss (4) and the coaxial inner conductor (6) inserted into the waveguide cavity (3).
5. A spread spectrum waveguide coaxial converter as claimed in claim 1, wherein: one end of the waveguide cavity (3) is closed, the other end of the waveguide cavity is provided with an opening, and the distance between the lower surface of the upper cavity close to one side of the opening and the upper surface of the lower cavity is gradually increased.
6. The spread spectrum waveguide coaxial converter according to claim 5, wherein: an upward extending inclined plane is formed on the lower surface of the upper cavity (1) from the middle part to the opening of the waveguide cavity (3), and a downward extending inclined plane is formed on the upper surface of the lower cavity (2) from the middle part to the opening of the waveguide cavity (3).
7. The spread spectrum waveguide coaxial converter according to claim 1, wherein: go up the right side of cavity (1) and lower cavity (2) and be formed with flange joint portion (8), be formed with connecting hole (9) on flange joint portion (8).
8. A spread spectrum waveguide coaxial converter as claimed in claim 1, wherein: the upper cavity (1) and the lower cavity (2) are fixedly connected together through mutually matched screws and screw holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220615760.3U CN217035944U (en) | 2022-03-21 | 2022-03-21 | Spread spectrum waveguide coaxial converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220615760.3U CN217035944U (en) | 2022-03-21 | 2022-03-21 | Spread spectrum waveguide coaxial converter |
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| Publication Number | Publication Date |
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| CN217035944U true CN217035944U (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220615760.3U Active CN217035944U (en) | 2022-03-21 | 2022-03-21 | Spread spectrum waveguide coaxial converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115966870A (en) * | 2022-12-28 | 2023-04-14 | 西安艾力特电子实业有限公司 | Coaxial rectangular waveguide conversion structure used near cut-off frequency |
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2022
- 2022-03-21 CN CN202220615760.3U patent/CN217035944U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115966870A (en) * | 2022-12-28 | 2023-04-14 | 西安艾力特电子实业有限公司 | Coaxial rectangular waveguide conversion structure used near cut-off frequency |
| CN115966870B (en) * | 2022-12-28 | 2023-08-25 | 西安艾力特电子实业有限公司 | Coaxial rectangular waveguide conversion structure near cut-off frequency |
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