CN216872231U - Termination spread spectrum waveguide coaxial converter - Google Patents
Termination spread spectrum waveguide coaxial converter Download PDFInfo
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- CN216872231U CN216872231U CN202220615759.0U CN202220615759U CN216872231U CN 216872231 U CN216872231 U CN 216872231U CN 202220615759 U CN202220615759 U CN 202220615759U CN 216872231 U CN216872231 U CN 216872231U
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Abstract
The utility model discloses a termination spread spectrum waveguide coaxial converter, and relates to the technical field of waveguide conversion devices. The converter includes cavity, lower cavity, apron and connector, it is formed with the waveguide cavity to go up between cavity and the lower cavity, the left and right sides of waveguide cavity is formed with the opening, the apron is fixed to the left end open-ended outside of waveguide cavity, the connector is fixed the outside of apron, just coaxial inner conductor on the connector passes enter into behind the through-hole on the apron in the waveguide cavity.
Description
Technical Field
The utility model relates to the technical field of waveguide conversion devices, in particular to a terminating 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 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 discontinuity, which in turn generates 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 technical problem to be solved by the utility model is to provide a terminating 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 terminated spread spectrum waveguide coaxial converter, characterized by: the coaxial cable comprises an upper cavity, a lower cavity, a cover plate and a connector, wherein a waveguide cavity is formed between the upper cavity and the lower cavity, openings are formed in the left side and the right side of the waveguide cavity, the cover plate is fixed to the outer side of the opening at the left end of the waveguide cavity, the connector is fixed to the outer side of the cover plate, and a coaxial inner conductor on the connector penetrates through a through hole in the cover plate and then enters the waveguide cavity; a continuous boss structure is formed on the left side of the inner surface of the lower cavity, a sleeve is arranged at the end part of the boss corresponding to the coaxial inner conductor, and the end part of the coaxial inner conductor is inserted into the sleeve; the distance between the upper cavity and the lower cavity is gradually increased from left to right.
The further technical scheme is as follows: the boss structure comprises a first boss, a second boss and a third boss which are continuously and gradually increased from right to left, the sleeve is positioned on the left side face of the third boss, a first groove is formed at the joint of the sleeve and the third boss, the end part of the coaxial inner conductor is inserted into the sleeve and extends into the first groove, and a distance is kept between the end part of the coaxial inner conductor and the bottom of the first groove.
The further technical scheme is as follows: an inclined plane extending upwards is formed on the lower surface of the upper cavity from the middle part to the right end opening of the waveguide cavity, and an inclined plane extending downwards is formed on the upper surface of the lower cavity from the middle part to the right end opening of the waveguide cavity.
The further technical scheme is as follows: the right side of the upper cavity is provided with an upper flange connecting part, the right side of the lower cavity is provided with a lower flange connecting part, the upper flange connecting part and the lower flange connecting part form a flange connecting part, and a connecting hole is formed in the flange connecting part.
Preferably, the upper cavity and the lower cavity are fixedly connected together through mutually matched screws and screw holes, and the cover plate and the connector are fixedly connected together with the upper cavity and the lower cavity through screws.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the converter utilizes the stepped structure to realize impedance matching, expands the working bandwidth, and the stepped structure is easy to debug, and is simple to process, and the processing difficulty is reduced. Meanwhile, a narrow b-edge structure (the short edge of the rectangular waveguide is called as a b edge) is used at the joint of the waveguide and the coaxial structure (the narrow b-edge structure is realized by arranging inclined planes on the upper surface and the lower surface in the cavity), so that the high-frequency bandwidth is further expanded, the working bandwidth is effectively expanded, and the structure is easy to process.
In addition, the cutoff frequency (low frequency) of the main mode of the rectangular waveguide is mainly influenced by the dimension of the long side, namely the a side, of the rectangular waveguide, so that the dimension of the b side 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 front view of a converter according to an embodiment of the present invention;
FIG. 4 is a left side view of the converter according to the embodiment of the present invention;
FIG. 5 is a schematic diagram of a right-view structure 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 A in FIG. 6;
FIGS. 8-9 are schematic perspective views of a lower chamber according to an embodiment of the present invention;
FIGS. 10-11 are schematic perspective views of an upper chamber body in an embodiment of the present invention;
FIG. 12 is a graph comparing the standing wave curves of the present invention and a standard waveguide;
FIG. 13 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 cover plate; 4. a connector; 5. a waveguide cavity; 6. a coaxial inner conductor; 7. a sleeve; 8. a first boss; 9. a second boss; 10. a third boss; 11. a first groove; 12. an upper flange connection; 13. a lower flange connection portion; 14. connecting holes; 15. a screw; 16. and positioning the pin.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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. 1-11, an embodiment of the present invention discloses a termination spread spectrum waveguide coaxial converter, which includes an upper cavity 1, a lower cavity 2, a cover plate 3 and a connector 4, where the upper cavity 1, the lower cavity 2, the cover plate 3 and the connector 4 are made of metal materials, and in an assembly process, the upper cavity 1 and the lower cavity 2 are first fixedly connected together through a screw 15 and a screw hole that are matched with each other, then the cover plate 3 is fixed to left ends of the upper cavity 1 and the lower cavity 2 by using a screw, and then the connector 4 is fixed to the cover plate by using a screw. In addition, the upper cavity 1 and the lower cavity 2 are respectively formed with a positioning pin 16 and a positioning hole, and the positioning pin 16 and the positioning hole can be quickly connected.
As shown in fig. 6-7, a waveguide cavity 5 is formed between the upper cavity 1 and the lower cavity 2, openings are formed on the left and right sides of the waveguide cavity 5, the cover plate 3 is fixed to the outer side of the left end opening of the waveguide cavity 5, the connector 4 is fixed to the outer side of the cover plate 3, and the coaxial inner conductor 6 on the connector 4 passes through the through hole on the cover plate 3 and then enters the waveguide cavity 3.
As shown in fig. 6-9, a continuous boss structure is formed on the left side of the inner surface of the lower cavity 2, and a sleeve 7 is disposed at the end of the boss structure corresponding to the coaxial inner conductor 6, and the end of the coaxial inner conductor 6 is inserted into the sleeve 7.
Further, as shown in fig. 6 to 9, the boss structure includes a first boss 8, a second boss 9 and a third boss 10 which are successively raised from right to left, the sleeve 7 is located on a left side surface of the third boss 10, a first groove 11 is formed at a connection position of the sleeve 7 and the third boss 10, and an end portion of the coaxial inner conductor 6 is inserted into the sleeve 7 and extends into the first groove 11, and is kept at a distance from a bottom of the first groove 11. Further, as shown in fig. 6, the upper surface of the third boss 10 is spaced apart from the lower surface of the upper chamber 1. Further, as shown in fig. 6, a gap is maintained between the coaxial inner conductor 6 and the through hole of the cap plate 3.
Further, as shown in fig. 6, the distance between the upper chamber 1 and the lower chamber 2 gradually increases from left to right. An inclined plane extending upwards is formed on the lower surface of the upper cavity 1 from the middle part to the right end opening of the waveguide cavity 5, and an inclined plane extending downwards is formed on the upper surface of the lower cavity 2 from the middle part to the right end opening of the waveguide cavity 5.
In addition, as shown in fig. 6 to 11, an upper flange connecting portion 12 is formed on the right side of the upper chamber 1, a lower flange connecting portion 13 is formed on the right side of the lower chamber 2, the upper flange connecting portion 12 and the lower flange connecting portion 13 constitute a flange connecting portion, and a connecting hole 14 is formed on the flange connecting portion, through which the converter can be connected with other components, so that the converter can be fixed more conveniently.
FIG. 12 is a graph comparing the standing wave curves of the present invention and a standard waveguide; FIG. 13 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 utilizes the stepped structure to realize impedance matching, expands the working bandwidth, and the stepped structure is easy to debug, and is simple to process, and the processing difficulty is reduced. Meanwhile, a narrow b-edge structure (the short edge of the rectangular waveguide is called as a b edge) is used at the joint of the waveguide and the coaxial structure (the narrow b-edge structure is realized by arranging inclined planes on the upper surface and the lower surface in the cavity), so that the high-frequency bandwidth is further expanded, the working bandwidth is effectively expanded, and the structure is easy to process.
In addition, the main mode cutoff frequency (low frequency) of the rectangular waveguide is mainly affected by the dimension of the long side, namely the a side, of the rectangular waveguide, so that the dimension of the b side (the short side of the rectangular waveguide) is reduced, and the influence on the main mode cutoff frequency 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.
Claims (8)
1. A terminated spread spectrum waveguide coaxial converter, characterized by: the waveguide cavity comprises an upper cavity body (1), a lower cavity body (2), a cover plate (3) and a connector (4), wherein a waveguide cavity body (5) is formed between the upper cavity body (1) and the lower cavity body (2), openings are formed in the left side and the right side of the waveguide cavity body (5), the cover plate (3) is fixed to the outer side of the opening at the left end of the waveguide cavity body (5), the connector (4) is fixed to the outer side of the cover plate (3), and a coaxial inner conductor (6) on the connector (4) penetrates through a through hole in the cover plate (3) and then enters the waveguide cavity body (5); a continuous boss structure is formed on the left side of the inner surface of the lower cavity (2), a sleeve (7) is arranged at the end part of the boss structure corresponding to the coaxial inner conductor (6), and the end part of the coaxial inner conductor (6) is inserted into the sleeve (7); the distance between the upper cavity (1) and the lower cavity (2) is gradually increased from left to right.
2. The terminated spread spectrum waveguide coaxial converter of claim 1, wherein: the boss structure comprises a first boss (8), a second boss (9) and a third boss (10) which are continuously and gradually increased from right to left, the sleeve (7) is located on the left side face of the third boss (10), a first groove (11) is formed at the joint of the sleeve (7) and the third boss (10), the end part of the coaxial inner conductor (6) is inserted into the sleeve (7) and extends into the first groove (11), and a distance is kept between the end part of the coaxial inner conductor and the bottom of the first groove (11).
3. The terminated spread spectrum waveguide coaxial converter of claim 2, wherein: the upper surface of the third boss (10) and the lower surface of the upper cavity (1) are kept at a certain distance.
4. The terminated spread spectrum waveguide coaxial converter of claim 1, wherein: a gap is kept between the coaxial inner conductor (6) and the through hole of the cover plate (3).
5. The terminated spread spectrum waveguide coaxial converter of claim 1, wherein: an inclined plane extending upwards is formed on the lower surface of the upper cavity (1) from the middle part to the opening at the right end of the waveguide cavity (5), and an inclined plane extending downwards is formed on the upper surface of the lower cavity (2) from the middle part to the opening at the right end of the waveguide cavity (5).
6. The terminated spread spectrum waveguide coaxial converter of claim 1, wherein: go up the right side of cavity (1) and be formed with flange joint portion (12) on, the right side of cavity (2) is formed with lower flange joint portion (13) down, go up flange joint portion (12) with flange joint portion (13) constitute flange joint portion down, be formed with connecting hole (14) on the flange joint portion.
7. The terminated spread spectrum waveguide coaxial converter of claim 1, wherein: the upper cavity (1) and the lower cavity (2) are fixedly connected together through a screw (15) and a screw hole which are matched with each other.
8. The terminated spread spectrum waveguide coaxial converter of claim 1, wherein: the cover plate (3) and the connector (4) are fixedly connected with the upper cavity (1) and the lower cavity (2) through screws (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220615759.0U CN216872231U (en) | 2022-03-21 | 2022-03-21 | Termination spread spectrum waveguide coaxial converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220615759.0U CN216872231U (en) | 2022-03-21 | 2022-03-21 | Termination spread spectrum waveguide coaxial converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023179087A1 (en) * | 2022-03-21 | 2023-09-28 | 胡南 | End-connected spread spectrum waveguide-and-coaxial converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023179087A1 (en) * | 2022-03-21 | 2023-09-28 | 胡南 | End-connected spread spectrum waveguide-and-coaxial converter |
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