A KU dual-polarized waveguide

Abstract

This utility model discloses a KU dual-polarized waveguide, including a waveguide and a waveguide port connected to each other. The waveguide includes a conversion feed section located at one end of the waveguide away from the waveguide port and a transmission section located at the other end of the waveguide. The conversion feed section has a straight needle and an L-shaped needle extending into the waveguide through an opening. The end of the L-shaped needle extending into the waveguide is not perpendicular to the central axis of the waveguide. The top surface of the conversion feed section has a planar area, and both the straight needle and the L-shaped needle extend into the waveguide through the planar area. This utility model provides a KU dual-polarized waveguide by offsetting the portion of the conventional L-shaped needle extending into the waveguide. This effectively increases the distance between the inner end of the L-shaped needle and the central axis and the straight needle, thus completely isolating horizontal and vertical signals, further optimizing the cross-polarization and isolation of the waveguide, and avoiding interference between the two sets of waveguide excitation signals from the straight needle and the L-shaped needle.

Description

Technical Field

[0001] This utility model relates to the field of waveguide technology, and in particular to a KU dual-polarized waveguide. Background Technology

[0002] The KU dual-polarized waveguide is a special rectangular waveguide structure used in KU-band satellite communications (KU band frequencies typically range from 10.7 to 12.75 GHz for downlink and from 12.75 to 18.1 GHz for uplink). Its core function is to simultaneously transmit two mutually orthogonal polarized signals (such as horizontal and vertical polarization), thereby achieving dual-channel multiplexing within a single waveguide. The cross-sectional shape of the KU dual-polarized waveguide is usually rectangular or circular, belonging to a uniform waveguide system. A uniform waveguide system refers to a waveguide system whose cross-sectional geometry, wall structure, and filling medium do not change in the axial direction. This application designs an E-plane curved waveguide structure.

[0003] Conventional KU waveguides typically contain straight pins and L-pins, which are placed inside circular or square waveguides. The end of the L-pin (the part extending into the waveguide) is basically perpendicular to the waveguide axis. Therefore, the distance between the end of the L-pin and the waveguide's central axis, as well as the distance between the straight pin and the L-pin, are relatively short. When 13V and 18V feed voltages are applied for excitation and coupling, the cross-polarization and reception isolation of the two sets of signals inside the waveguide will have some mutual influence. To address this, a KU dual-polarization waveguide is proposed. Utility Model Content

[0004] Based on this, it is necessary to provide a KU dual-polarization waveguide to address the above-mentioned technical problems. The portion of the conventional L-shaped needle inserted into the waveguide is offset, which can effectively increase the distance between the inner end of the L-shaped needle and the central axis and the straight needle. This can completely isolate the horizontal and vertical signals, further optimize the cross-polarization and isolation of the waveguide, and avoid interference between the two sets of waveguide excitation signals of the straight needle and the L-shaped needle.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A KU dual-polarized waveguide includes a waveguide and a waveguide port connected to each other. The waveguide includes a conversion feed section located at one end of the waveguide away from the waveguide port and a transmission section located at the other end of the waveguide.

[0007] The conversion power supply section has a straight needle and an L-shaped needle extending into the waveguide through an opening. The end of the L-shaped needle extending into the waveguide is not perpendicular to the central axis of the waveguide.

[0008] Furthermore, the top surface of the conversion feed section has a planar area, and both the straight needle and the L-shaped needle extend into the waveguide through the planar area.

[0009] Furthermore, the planar area is provided with a straight needle insertion groove and an L-shaped needle positioning groove at the positions corresponding to the straight needle and the L-shaped needle, respectively;

[0010] One end of the straight needle extends into the waveguide through a straight needle insertion groove, and the L-shaped needle extends into the waveguide through an L-shaped needle positioning groove.

[0011] Furthermore, the L-shaped needle includes an inner end and an outer end, and the connection between the inner end and the outer end is fixed in the L-shaped needle positioning groove, so that the inner end extends into the groove.

[0012] Furthermore, a gap is left between the inner end and the central axis of the waveguide.

[0013] Furthermore, the inner end of the L-shaped needle is arranged parallel to the central axis.

[0014] Furthermore, the inner end of the L-shaped needle is inclined toward the central axis.

[0015] Furthermore, the waveguide port has a radiating section, and the radiating section, the transmitting section, and the conversion feeding section are arranged in sequence to form the waveguide tube.

[0016] Furthermore, the conversion power supply unit is square in shape except for the planar area.

[0017] Furthermore, the conversion power supply section is circular in shape outside the planar area.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The KU dual-polarized waveguide provided by this utility model has an offset setting for the part of the conventional L-shaped needle that extends into the waveguide. This can effectively increase the distance between the inner end of the L-shaped needle and the central axis and the straight needle, so that the horizontal and vertical signals can be completely isolated. This further optimizes the cross-polarization and isolation of the waveguide and avoids the interference between the two sets of waveguide excitation signals of the straight needle and the L-shaped needle when applying 13V and 18V feed voltages for excitation and coupling. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the KU dual-polarized waveguide provided by this utility model;

[0021] Figure 2 A schematic diagram of the waveguide port structure of the KU dual-polarized waveguide provided by this utility model;

[0022] Figure 3 A schematic diagram of the switching feed section structure of the KU dual-polarized waveguide provided by this utility model;

[0023] Figure 4 A schematic diagram of the angle placement structure of the inner end of the KU dual-polarized waveguide in Embodiment 3 of this utility model;

[0024] Figure 5 A schematic diagram of the planar structure of the inner end of the KU dual-polarized waveguide provided by this utility model in Embodiment 3;

[0025] Figure 6 A schematic diagram of the internal conversion feed section of Embodiment 4 of the KU dual-polarized waveguide provided by this utility model;

[0026] Figure 7 A bottom view of the internal conversion feed section of Embodiment 4 of the KU dual-polarized waveguide provided by this utility model;

[0027] Figure 8 A schematic diagram of the inner end structure of Embodiment 4 of the KU dual-polarized waveguide provided by this utility model;

[0028] Figure 9 This is a schematic diagram of the planar state of the inner end of Embodiment 4 of the KU dual-polarized waveguide provided by this utility model.

[0029] The markings in the diagram are explained as follows:

[0030] Waveguide 1, conversion feed section 11, transmission section 12, central axis 13;

[0031] Planar area 110, straight needle insertion groove 111, L-needle positioning groove 112, groove body 113;

[0032] Waveguide port 2, radiating section 21;

[0033] Straight needle 3;

[0034] L-shaped needle 4; inner end 41, outer end 42. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0036] As described in the background section, conventional KU waveguides typically have straight pins and L-pins, which are placed inside circular or square waveguides. The end of the L-pin (the part extending into the waveguide) is basically perpendicular to the waveguide axis. Therefore, the distance between the end of the L-pin and the central axis of the waveguide is relatively short, which leads to some mutual interference between the cross-polarization and reception isolation of the two sets of signals inside the waveguide.

[0037] To solve this technical problem, this utility model provides a KU dual-polarized waveguide, which is applied to KU dual-polarized waveguides.

[0038] For details, please refer to Figures 1-9 As shown, the KU dual-polarized waveguide specifically includes a waveguide 1 and a waveguide port 2 connected to each other. The waveguide 1 includes a conversion feed section 11 located at one end of the waveguide 1 away from the waveguide port 2 and a transmission section 12 located at the other end of the waveguide 1.

[0039] The conversion power supply unit 11 extends into the waveguide 1 through an opening and has a straight needle 3 and an L-shaped needle 4. One end of the L-shaped needle 4 extending into the waveguide 1 is not perpendicular to the central axis 13 of the waveguide 1.

[0040] The KU dual-polarized waveguide provided by this utility model has an offset setting for the portion of the conventional L-shaped needle 4 that extends into the waveguide 1. This effectively increases the distance between the inner end 41 of the L-shaped needle 4 and the central axis 13 and the straight needle 3, thus completely isolating the horizontal and vertical signals. This further optimizes the cross-polarization and isolation of the waveguide and avoids interference between the two sets of waveguide excitation signals of the straight needle and the L-shaped needle when applying 13V and 18V feed voltages for excitation and coupling.

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0042] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] Example 1

[0045] Please refer to Figures 1-9As shown, a KU dual-polarized waveguide includes a waveguide 1 (E-plane bent waveguide structure) and a waveguide port 2 connected to each other. The waveguide 1 includes a conversion feed section 11 located at one end of the waveguide 1 away from the waveguide port 2 and a transmission section 12 located at the other end of the waveguide 1. In this embodiment, the waveguide 1 and the waveguide port 2 can be an integrated connection structure, or they can be assembled separately. However, in this embodiment, they are an integrated structure.

[0046] The conversion feed unit 11 extends into the waveguide 1 through an opening and includes a straight needle 3 and an L-shaped needle 4. One end of the L-shaped needle 4 extending into the waveguide 1 is not perpendicular to the central axis 13 of the waveguide 1.

[0047] The waveguide port 2 has a radiating section 21, and the radiating section 21, the transmission section 12, and the conversion feed section 11 are sequentially arranged to form the waveguide tube. Figure 3 As shown, the waveguide, according to its functional areas, includes a conversion feed section 11, a transmission section 12, and a radiation section 21. The waveguide port 2 is specifically the radiation section 21 used to connect to the feed source. The waveguide 1 includes the conversion feed section 11 and the transmission section 12.

[0048] like Figure 3 As shown, the conversion feed section 11 is located at the end of the waveguide 10, and the transmission section 12 is located between the conversion feed section 11 and the radiation section 21. The transmission section is used for energy transmission. The conversion feed section 11 has a probe, and the circular waveguide is excited by the probe. In this embodiment, the probe is a straight needle 3 and an L-shaped needle 4.

[0049] In this embodiment, to address the issue of short distance between the end of the L-shaped pin and the central axis of the waveguide, which leads to mutual interference between the cross-polarization and reception isolation of the two sets of signals within the waveguide, resulting in poor input standing wave ratio and cross-polarization interference, the angle of the inner end of the L-shaped pin 4 (the part extending into the waveguide 1) is adjusted to make it asymmetrical with the central axis 13 on one side. This effectively increases the distance between the L-shaped pin 4 and the central axis, as well as the distance between it and the straight pin 3. This allows for complete isolation of horizontal and vertical signals, further optimizing the cross-polarization and isolation of the waveguide and avoiding interference between the two sets of waveguide excitation signals from the straight pin and the L-shaped pin.

[0050] Example 2

[0051] The KU dual-polarized waveguide provided in Example 1 is further optimized, specifically, as follows: Figure 4 As shown, the top surface of the conversion feed section 11 has a planar area 110, and both the straight needle 3 and the L-shaped needle 4 extend into the waveguide 1 through the planar area 110;

[0052] The planar area 110 is provided with a straight needle insertion groove 111 and an L-needle positioning groove 112 at the positions corresponding to the straight needle 3 and the L-shaped needle 4, respectively;

[0053] Wherein, one end of the straight needle 3 extends into the waveguide 1 through the straight needle insertion groove 111, and the L-shaped needle 4 extends into the waveguide 1 through the L-shaped needle positioning groove 112. In this way, while keeping the vertical positions of the straight needle 3 and the L-shaped needle 4 unchanged, the distance between the L-shaped needle 4 and the straight needle 3 inside the waveguide 1 can be increased by simply adjusting the angle of the inner end 41 of the L-shaped needle 4 in the horizontal direction.

[0054] like Figure 5 As shown, the inner end of a conventional L-shaped needle is perpendicular to the right central axis 13, meaning that the inner end of a conventional L-shaped needle is horizontal on the right side. However, in this embodiment, the angle of the inner end 41 of the L-shaped needle 4 is adjusted clockwise so that it is not perpendicular to the central axis 13, thereby increasing the distance between the needle and the central axis 13 and the straight needle 3.

[0055] It should be noted that in this embodiment, the angle of the inner end of the L-shaped needle 4 can only be adjusted within the corresponding groove 113. That is, the clockwise adjustment range is within 90 degrees, and the maximum adjustment angle is limited to 90 degrees clockwise, meaning that the inner end 41 is parallel to the central axis 13.

[0056] Example 3

[0057] Further optimizations can be made to the KU dual-polarized waveguide provided in Embodiment 1 or 2, such as... Figure 4 As shown, the L-shaped needle 4 includes an inner end 41 and an outer end 42. The connection between the inner end 41 and the outer end 42 is fixed in the L-needle positioning groove 112, so that the inner end 41 extends into the groove 113.

[0058] The inner end 41 is spaced from the central axis 13 of the waveguide 1;

[0059] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the inner end 41 of the L-shaped needle 4 is inclined toward the central axis 13. In this embodiment, the inner end 41 is adjusted clockwise within 90 degrees, based on the conventional horizontal setting and perpendicular to the central axis. In this embodiment, the clockwise adjustment angle of the inner end 41 is 45 degrees. The specific angle can be adjusted adaptively according to the actual scenario. It should be noted that when the angle of the inner end 41 changes within 90 degrees, the shape of the side wall of the corresponding groove 113 also needs to be adjusted adaptively to achieve better signal isolation.

[0060] The conversion power supply unit 11, except for the planar area 110, is generally square. In this embodiment, the rows of the slots 113 within the square conversion power supply unit 11 are as follows: Figure 1 As shown, it is a polygonal arrangement, specifically including a first plane corresponding to the outlet end of the waveguide 1 and a second plane arranged parallel to the first plane. The left side of the first plane (near the L-shaped pin 4) is connected to one side of the second plane through a side straight surface and a first side inclined surface. The right side of the first plane is connected to the other side of the second plane through a second side inclined surface. The first plane, the second side inclined surface, the second plane, the first side inclined surface and the side straight surface are connected clockwise to form the groove 113. The inner end 41 of the L-shaped pin 4 in the "square" conversion feed part 11 corresponds to the connection point of the second side inclined surface.

[0061] Example 4

[0062] The difference between this embodiment and the above embodiment three is that the inner end 41 of the L-shaped needle 4 is arranged parallel to the central axis 13, and the conversion power supply part (11) is "circular" in general except for the planar area 110;

[0063] Specifically, such as Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the inner end 41 of the L-shaped needle 4 is arranged parallel to the central axis 13. In this embodiment, the inner end of the L-shaped needle 4 is rotated 90 degrees clockwise on the basis of the conventional horizontal and vertical state of the central axis, so that the inner end of the L-shaped needle 4 is arranged parallel to the right side of the central axis 13. The distance between the inner end of the L-shaped needle 4 in this state and the distance (the distance traveled in the waveguide 1) of the inner end of the L-shaped needle 4 in the above embodiment 3 is further increased compared to that of the straight needle 3. This can completely isolate the horizontal and vertical signals, further optimize the cross polarization and isolation of the waveguide, and avoid interference between the two sets of waveguide excitation signals of the straight needle and the L-shaped needle.

[0064] Furthermore, since the angle of the inner end 41 has been adjusted in this embodiment, the conversion power supply section 11 in this embodiment is generally "circular" except for the planar area 110. The groove 113 within the "circular" conversion power supply section 11 in this embodiment is as follows: Figure 6As shown, it includes a first plane at the outlet end of the waveguide 1 and a second plane that is parallel to and opposite to the first plane. The left side of the first plane (near the L-shaped pin 4) is connected to the second plane through a first side straight surface. The right end of the first plane is connected to the second plane through a second side straight surface and a side inclined surface in sequence. The first plane, the second side straight surface, the side inclined surface, the second plane and the first side straight surface are connected clockwise to form the groove 113. The inner end 41 of the L-shaped pin 4 in the "circular" conversion feed section 11 is perpendicular to the second plane.

[0065] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0066] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A KU dual-polarized waveguide, characterized in that, It includes a waveguide (1) and a waveguide port (2) connected to each other. The waveguide (1) includes a conversion feed section (11) located at one end of the waveguide (1) away from the waveguide port (2) and a transmission section (12) located at the other end of the waveguide (1). The conversion power supply unit (11) extends into the waveguide (1) through an opening and has a straight needle (3) and an L-shaped needle (4). The end of the L-shaped needle (4) extending into the waveguide (1) is not perpendicular to the central axis (13) of the waveguide (1).

2. The KU dual-polarized waveguide according to claim 1, characterized in that, The top surface of the conversion power supply section (11) has a planar area (110), and the straight needle (3) and the L-shaped needle (4) both extend into the waveguide (1) through the planar area (110).

3. The KU dual-polarized waveguide according to claim 2, characterized in that, The planar area (110) is provided with a straight needle insertion groove (111) and an L-needle positioning groove (112) at the positions corresponding to the straight needle (3) and the L-shaped needle (4), respectively. One end of the straight needle (3) is inserted into the waveguide (1) through the straight needle insertion groove (111), and the L-shaped needle (4) is inserted into the waveguide (1) through the L-shaped needle positioning groove (112).

4. The KU dual-polarized waveguide according to claim 3, characterized in that, The L-shaped needle (4) includes an inner end (41) and an outer end (42). The connection between the inner end (41) and the outer end (42) is fixed in the L-needle positioning groove (112), so that the inner end (41) extends into the groove (113).

5. The KU dual-polarized waveguide according to claim 4, characterized in that, The inner end (41) is spaced from the central axis (13) of the waveguide (1).

6. The KU dual-polarized waveguide according to claim 4, characterized in that, The inner end (41) of the L-shaped needle (4) is arranged parallel to the central axis (13).

7. The KU dual-polarized waveguide according to claim 4, characterized in that, The inner end (41) of the L-shaped needle (4) is inclined toward the central axis (13).

8. The KU dual-polarized waveguide according to claim 1, characterized in that, The waveguide port (2) has a radiating section (21), and the radiating section (21), the transmission section (12) and the conversion feed section (11) are arranged in sequence to form the waveguide tube.

9. The KU dual-polarized waveguide according to claim 7, characterized in that, The conversion power supply unit (11) is square in shape except for the planar area (110).

10. The KU dual-polarized waveguide according to claim 6, characterized in that, The conversion power supply unit (11) is circular in shape except for the planar area (110).

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