CN219677569U - Waveguide flange - Google Patents
Waveguide flange Download PDFInfo
- Publication number
- CN219677569U CN219677569U CN202321218234.4U CN202321218234U CN219677569U CN 219677569 U CN219677569 U CN 219677569U CN 202321218234 U CN202321218234 U CN 202321218234U CN 219677569 U CN219677569 U CN 219677569U
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- flange
- waveguide
- standard rectangular
- columns
- rectangular waveguide
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- 238000007789 sealing Methods 0.000 claims abstract description 12
- 239000004020 conductor Substances 0.000 claims abstract description 3
- 238000003491 array Methods 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005288 electromagnetic effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012945 sealing adhesive Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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- Waveguide Aerials (AREA)
Abstract
The utility model discloses a waveguide flange, which belongs to the technical field of weather radar antennas, and comprises a square flange, wherein a standard rectangular waveguide port is arranged in the center of the square flange, band gap columns with good conductor properties are arranged around the four sides of the standard rectangular waveguide port, circular sealing rubber strip grooves are formed in the peripheries of the band gap columns, and positioning pins are arranged in the inner parts surrounded by the circular sealing rubber strip grooves; the utility model can inhibit signal transmission loss caused by the discontinuity of the waveguide flange end surface due to processing and assembly errors, and has wide application prospect in the fields of high-power microwave signal transmission, reflecting surface antenna waveguide feed network systems and the like.
Description
Technical Field
The utility model relates to the technical field of weather radar antennas, in particular to a waveguide flange.
Background
At present, in the technical field of weather radar antennas, the antenna is required to bear larger and larger transmitting power, and correspondingly, higher technical requirements are put forward on a waveguide transmission network, so that the transmission loss of a feeder line is required to be reduced as far as possible on the premise of meeting the power capacity. There are multiple cascaded waveguides in the weather radar antenna feeder network, and typically, choking grooves are arranged on the surface of the waveguide flange to inhibit the leaked signals, but the effect is limited, larger standing waves and transmission loss can be generated, and the loss of 0.5dB is expressed in the X wave band. Currently, waveguide choke structures in different forms are adopted in engineering applications in a number of technical fields:
(1) Waveguide slot antenna array: the choke groove is arranged at the joint between the waveguide subarrays to prevent current from resonating at the joint and causing unnecessary loss and radiation, so that the radiation characteristic of the antenna is changed;
(2) Synthetic aperture radar antenna system: a plurality of subarrays of the synthetic aperture radar antenna are transmitted through a waveguide feeder line, and a circular choke groove is arranged on the flange and used for inhibiting signal transmission loss;
(3) Reflecting surface antenna feed network system: a large number of waveguide feeders are arranged in the feed source network system, flange devices are arranged at cascading positions of different waveguide feeders, and annular choke grooves are arranged on the flange faces and used for inhibiting signal leakage.
The waveguide choke structures have advantages and disadvantages: although individual index characteristics are excellent, the common defect of the individual index characteristics is that the choke effect is limited, the structure of the individual index characteristics is closely related to the bandwidth of a transmission signal, and the technical requirement of equipment on low insertion loss in a frequency band cannot be met.
Disclosure of Invention
In view of this, the utility model provides a waveguide flange which can effectively reduce the transmission loss of a feeder line and has the characteristics of low insertion loss, wide bandwidth, compact structure and easy assembly.
In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:
the waveguide flange comprises a square flange 1, wherein a standard rectangular waveguide port 2 is arranged in the center of the square flange 1; the square flange 1 coincides with the geometric center point of the standard rectangular waveguide port 2, four sides of the standard rectangular waveguide port 2 are correspondingly parallel to four sides of the square flange 1, the standard rectangular waveguide port 2 protrudes out of the surface of the square flange 1, band gap columns 3 in a rectangular array are arranged around the standard rectangular waveguide port 2, and the height of the band gap columns 3 is consistent with the protruding height of the standard rectangular waveguide port 2.
Further, at least two rows and five columns of band-gap columns 3 are arranged on the outer side of the long side of the standard rectangular waveguide port 2, at least two rows and three columns of band-gap columns 3 are arranged on the outer side of the short side, and the band-gap columns 3 are good conductors.
Further, the protruding height of the standard rectangular waveguide port 2 is h, and 0.02375 lambda 0 ＜h＜0.02625λ 0 ，λ 0 For transmitting the wavelength corresponding to the center frequency of the signal, the cross section of the band gap column 3 is square, the side length of the square is a, and 0.076λ 0 ＜a＜0.084λ 0 The gap between the bandgap columns 3 is L 1 And 0.114 lambda 0 ＜L 1 ＜0.126λ 0 The distance between the inner wall of the standard rectangular waveguide port 2 and the nearest band gap column 3 around the four sides is L 2 And 0.0475λ 0 ＜L 2 ＜0.0525λ 0 。
Further, a circular sealing rubber strip groove 4 and a positioning pin 5 are arranged on the surface of the square flange 1, the band gap column 3 is arranged in the area surrounded by the circular sealing rubber strip groove 4, and the positioning pin (5) corresponds to a positioning pin through hole on the planar waveguide flange.
By adopting the technical scheme, the utility model has the beneficial effects that:
1. according to the utility model, through the design of the band gap columns in the rectangular array around the standard rectangular waveguide port, the technical effect of choke flow of high-power microwave signal transmission in the waveguide feeder network of the radar antenna system can be realized within a certain bandwidth, so that the transmission loss of the feeder is reduced.
2. The utility model can ensure the precision of flange assembly through the design of the locating pin.
Drawings
FIG. 1 is a schematic diagram of an axial structure of a waveguide flange according to an embodiment of the present utility model.
Fig. 2 is a schematic view of the flange surface structure of fig. 1.
Fig. 3 is a schematic diagram of an axial structure of a planar waveguide flange according to an embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and the detailed description.
As shown in fig. 1, a waveguide flange comprises a square flange 1, wherein a standard rectangular waveguide port 2 is arranged in the center of the square flange 1; the square flange 1 coincides with the geometric center point of the standard rectangular waveguide port 2, four sides of the standard rectangular waveguide port 2 are correspondingly parallel to four sides of the square flange 1, the standard rectangular waveguide port 2 protrudes out of the surface of the square flange 1, band gap columns 3 in a rectangular array are arranged around the standard rectangular waveguide port 2, and the height of the band gap columns 3 is consistent with the protruding height of the standard rectangular waveguide port 2.
Specifically, the square flange 1 has the same structural dimensions as a conventional planar waveguide flange.
Further, two rows and five columns of band gap columns 3 are arranged on the outer side of the long side of the standard rectangular waveguide port 2, two rows and three columns of band gap columns 3 are arranged on the outer side of the short side, and the band gap columns 3 are made of aluminum materials.
Specifically, the band gap columns 3 in rectangular arrays around the standard rectangular waveguide port 2 construct an electromagnetic band gap structure, and play an electromagnetic effect of stop band filtering on signals within a certain bandwidth, so that current leakage on the surface of the waveguide flange is effectively inhibited, and the loss of the signals is reduced.
Further, the protruding height of the standard rectangular waveguide port 2 is h, and h=0.025λ 0 ，λ 0 For the wavelength corresponding to the center frequency of the transmission signal, as shown in FIG. 2, a standard rectangular waveWall thickness d=0.02λ of the guide opening 2 0 The bandgap pillar 3 has a square cross section, the sides of the square being a, and a=0.08λ 0 The gap between the bandgap columns 3 is L 1 And L is 1 ＝0.12λ 0 The distance between the inner wall of the standard rectangular waveguide port 2 and the nearest band gap column 3 around the four sides is L 2 And L is 2 ＝0.05λ 0 。
In particular, the above relates to lambda 0 The values of the frequency band are all above 5GHz, and the effect is optimal.
Further, a circular sealing rubber strip groove 4 and a positioning pin 5 are arranged on the surface of the square flange 1, the band gap column 3 is arranged in the area surrounded by the circular sealing rubber strip groove 4, and the positioning pin (5) corresponds to a positioning pin through hole on the planar waveguide flange as shown in fig. 3.
Specifically, the positioning pin 5 can ensure the precision of flange assembly; the grooves of the circular sealing rubber strip grooves 4 can accommodate sealing rubber strips with corresponding sizes for waterproof design.
When the waveguides are connected, the waveguide flanges are butted with the planar waveguide flanges shown in the figure 3, the planar waveguide flanges comprise square flanges and standard rectangular waveguide ports, the square flanges of the planar waveguide flanges are overlapped with the geometric center points of the standard rectangular waveguide ports, four sides of the standard rectangular waveguide ports are correspondingly parallel to four sides of the square flanges, and circular sealing adhesive tape grooves are further formed in the surfaces of the planar waveguide flanges; the waveguide flange and the planar waveguide flange are fixed through screws, the protruding part of the standard rectangular waveguide port 2 of the waveguide flange is opposite to the standard rectangular waveguide port of the planar waveguide flange, the band gap column 3 of the waveguide flange is abutted against the square flange surface of the planar waveguide flange and is tightly attached, and in addition, the circular sealing rubber strip is arranged between the circular sealing rubber strip grooves of the waveguide flange and the planar waveguide flange.
Specifically, the planar waveguide flange is a conventionally used planar waveguide flange.
In a word, the utility model can reduce the signal resonance sensitivity and reduce the transmission loss of electromagnetic signals caused by factors such as the surface roughness of the planar waveguide flange, assembly errors and the like; the device has the characteristics of low insertion loss, wide bandwidth, compact structure and easiness in assembly, and has practicability.
Finally, it should be noted that: the foregoing is merely illustrative of the preferred embodiments of the present utility model and the utility model is not limited thereto, but is intended to cover modifications, equivalents, improvements and the like without departing from the spirit and scope of the present utility model as defined by the following claims.
Claims (4)
1. The waveguide flange comprises a square flange (1), wherein a standard rectangular waveguide port (2) is arranged in the center of the square flange (1), the geometric center point of the square flange (1) and the geometric center point of the standard rectangular waveguide port (2) are coincided, and four sides of the standard rectangular waveguide port (2) are correspondingly parallel to four sides of the square flange (1); the rectangular waveguide structure is characterized in that the standard rectangular waveguide opening (2) protrudes from the surface of the square flange (1), band gap columns (3) in rectangular arrays are arranged around the standard rectangular waveguide opening (2), and the height of the band gap columns (3) is consistent with the protruding height of the standard rectangular waveguide opening (2).
2. A waveguide flange according to claim 1, characterized in that the outside of the long side of the standard rectangular waveguide port (2) is provided with at least two rows and five columns of bandgap columns (3), the outside of the short side is provided with at least two rows and three columns of bandgap columns (3), and the bandgap columns (3) are good conductors.
3. A waveguide flange according to claim 1, characterized in that the protruding height of the standard rectangular waveguide opening (2) is h and 0.02375 λ 0 ＜h＜0.02625λ 0 ，λ 0 For transmitting the wavelength corresponding to the center frequency of the signal, the cross section of the band gap column (3) is square, the side length of the square is a, and 0.076lambda 0 ＜a＜0.084λ 0 The interval between the band gap columns (3) is L 1 And 0.114 lambda 0 ＜L 1 ＜0.126λ 0 The distance between the inner wall of the standard rectangular waveguide port (2) and the nearest band gap column (3) around the four sides is L 2 And 0.0475λ 0 ＜L 2 ＜0.0525λ 0 。
4. The waveguide flange according to claim 1, wherein the surface of the square flange (1) is provided with a circular sealing rubber strip groove (4) and a positioning pin (5), the band gap column (3) is arranged inside the area surrounded by the circular sealing rubber strip groove (4), and the positioning pin (5) corresponds to a positioning pin through hole on the planar waveguide flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218234.4U CN219677569U (en) | 2023-05-19 | 2023-05-19 | Waveguide flange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321218234.4U CN219677569U (en) | 2023-05-19 | 2023-05-19 | Waveguide flange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219677569U true CN219677569U (en) | 2023-09-12 |
Family
ID=87926318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321218234.4U Active CN219677569U (en) | 2023-05-19 | 2023-05-19 | Waveguide flange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219677569U (en) |
-
2023
- 2023-05-19 CN CN202321218234.4U patent/CN219677569U/en active Active
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