Elliptical waveguide power divider

Abstract

The application provides an elliptical waveguide power divider, which comprises an n-stage power distribution structure, n is an integer greater than or equal to 1, the n-stage power distribution structure comprises two power dividers, the power divider comprises a main waveguide and two branch waveguides connected to the main waveguide, the branch waveguide in the n-stage power distribution structure is connected to the main waveguide in the n+1-stage power distribution structure through a bending waveguide, and the main waveguide, the branch waveguide and the bending waveguide are all elliptical waveguides with an elliptical cross section. n‑1 The elliptical waveguide power divider provided by the application adopts an elliptical waveguide as a transmission line architecture of the waveguide power divider, the inner cavity is designed to have no horizontal suspension structure in the vertical direction, the inner wall can be self-supported in the process of 3-D printing, the quality of the integrated forming of the device structure by using the additive manufacturing technology is improved obviously while the wideband power distribution performance of the device is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of electromagnetic field and microwave technology, and more particularly relates to an elliptical waveguide power divider. BACKGROUND

[0002] A power divider is a kind of multi-port microwave passive device, which is used to divide one RF power signal into multiple paths, and also can be used as a power combiner to combine multiple RF power signals into one. Waveguide power dividers have the advantages of large power capacity, small RF loss and high mechanical strength, and play an important role in the front end of microwave and millimeter wave communication systems (such as antenna array feed networks). According to the structural characteristics of waveguides, waveguide power dividers can be divided into two categories: E-plane power dividers and H-plane power dividers, and their core functional structures are E-plane and H-plane waveguide Y / T junctions, respectively. In traditional waveguide power dividers, metal diaphragms, metal columns, stepped waveguides and other structures are often used to achieve wideband impedance matching.

[0003] In the traditional technology, waveguide power dividers are usually manufactured by computer numerical control (CNC) milling or micro-machining process according to the application frequency band and size requirements. These machining processes can achieve high precision, but have great limitations when manufacturing complex structures. A waveguide power divider with complex structure often needs to be split into multiple parts for machining and then assembled, and the gaps between the assembled parts and other discontinuous structures caused by machining errors will cause the deterioration of RF performance. In addition, the traditional waveguide power divider has many redundant structural materials and many assembly fasteners, and the device is heavy, which is not conducive to the lightweight and miniaturization of communication systems.

[0004] An alternative processing scheme for the waveguide power divider is additive manufacturing technology. The conventional waveguide power divider uses a rectangular waveguide as the basic transmission line architecture, which can be manufactured by 3-D printing process. However, the compatibility between the rectangular waveguide structure and the 3-D printing process is poor, which is manifested in the following aspects: (1) the rectangular waveguide cavity is difficult to be integrally formed by 3-D printing; (2) the suspended structure in the waveguide cavity needs support during the 3-D printing process, but the support structure in the cavity is difficult to remove after the process is completed; (3) the microstructure such as the diaphragm in the cavity is prone to deformation or damage; (4) the deformation caused by the 3-D printing material and process itself can easily deteriorate the radio frequency performance of the device; (5) the surface quality of the discontinuous structure such as the stepped waveguide after 3-D printing is poor, and problems such as damage and residual printing material are prone to occur. For example, when the conventional rectangular waveguide power divider is processed by the 3-D printing process, a suitable printing direction must be selected to ensure that the waveguide cavity is formed without any internal support, so the electronic model of the waveguide power divider needs to be tilted at a suitable angle for printing. However, the key enabling structure inside the waveguide power divider is prone to deformation when printing at an angle, which destroys the structural symmetry and leads to deterioration of the reflection and transmission performance of the waveguide power divider. In addition, for a multi-output waveguide power divider with a complex structure, it is difficult to find a suitable tilt angle to meet the technical requirements of "internal support-free" and "integrally formed" for the waveguide cavity. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide an elliptical waveguide power divider to solve the compatibility conflict between the physical structure of the rectangular waveguide power divider and the 3-D printing process in the prior art.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is to provide an elliptical waveguide power divider, which comprises an n-stage power distribution structure, n is an integer greater than or equal to 1, the n-stage power distribution structure comprises two power dividers, the power divider comprises a main waveguide and two branch waveguides connected to the main waveguide, the branch waveguide in the n-stage power distribution structure is connected to the main waveguide in the n+1-stage power distribution structure through a curved waveguide, and the main waveguide, the branch waveguide and the curved waveguide are all elliptical waveguides with an elliptical cross section. n-1

[0007] Optionally, in the same power divider, the connection between the main waveguide and the two branch waveguides has an arch structure, the top of the arch structure is close to the branch waveguide, and the bottom of the arch structure is close to the main waveguide.

[0008] Optionally, the central axes of the main waveguides of each power divider are parallel to each other. ​

[0009] Optionally, the two ends of the elliptical waveguide power divider each have a rectangular waveguide port, and the power distribution structure is connected to the rectangular waveguide port through a transition waveguide.

[0010] Optionally, the curved waveguide comprises an E-plane curved waveguide and an H-plane curved waveguide connected to each other, and the E-plane curved waveguide is connected to the main waveguide, and the H-plane curved waveguide is connected to the branch waveguide, or the E-plane curved waveguide is connected to the branch waveguide, and the H-plane curved waveguide is connected to the main waveguide.

[0011] Optionally, the elliptical waveguide power divider is a metal shell with an inner cavity, and the inner cavity is smoothly arranged.

[0012] Optionally, the power divider is a Y-junction power divider.

[0013] Optionally, in the same Y-junction power divider, the included angle between the central axis of the branch waveguide and the central axis of the main waveguide is between 90 degrees and 150 degrees, and the included angle between the central axes of the two branch waveguides is between 60 degrees and 180 degrees.

[0014] Optionally, the power divider is a T-junction power divider.

[0015] Optionally, in the same T-junction power divider, the included angle between the central axis of the branch waveguide and the central axis of the main waveguide is between 90 degrees and 150 degrees, and the included angle between the central axes of the two branch waveguides is between 60 degrees and 180 degrees.

[0016] The elliptical waveguide power divider provided by the application has the following advantages: compared with the prior art, the elliptical waveguide is used as the transmission line architecture of the waveguide power divider, the inner cavity is designed without any horizontal suspension structure in the vertical direction, and the waveguide discontinuity structure is minimized, the process principle of 3-D printing is integrated, the inner wall can be self-supported during 3-D printing, the quality of the device structure integrated into one by using additive manufacturing technology is improved, the symmetry of the key structure is not destroyed during cavity forming, and the deterioration of the cavity deformation on the radio frequency performance of the device is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 A perspective view of an E-plane elliptical waveguide power divider according to an embodiment of the present application;

[0019] Figure 2 A perspective view of an E-plane elliptical waveguide power divider according to an embodiment of the present application; Figure 1 A perspective view along the A-A section;

[0020] Figure 3 A perspective view along the B-B section; Figure 1 A perspective view along the B-B section;

[0021] Figure 4 A perspective view of an H-plane elliptical waveguide power divider according to an embodiment of the present application; Figure 1 ;

[0022] Figure 5 A perspective view of an H-plane elliptical waveguide power divider according to an embodiment of the present application; Figure 2 ;

[0023] Figure 6 A perspective view along the C-C section; Figure 5 A perspective view along the C-C section;

[0024] Figure 7 A perspective view along the D-D section; Figure 5 A perspective view along the D-D section;

[0025] Figure 8 A simulated scattering parameter plot of a Y-junction power divider of an E-plane elliptical waveguide power divider according to an embodiment of the present application;

[0026] Figure 9 A simulated scattering parameter plot of an air cavity model of an E-plane elliptical waveguide power divider (without transition waveguide) according to an embodiment of the present application;

[0027] Figure 10 A simulated and measured scattering parameter plot of an E-plane elliptical waveguide power divider (with transition waveguide) according to an embodiment of the present application;

[0028] Figure 11 A close-up view of the transmission coefficient plot; Figure 10 A close-up view of the transmission coefficient plot;

[0029] Figure 12 A simulated scattering parameter plot of a T-junction power divider of an H-plane elliptical waveguide power divider according to an embodiment of the present application;

[0030] Figure 13 A simulated scattering parameter plot of an air cavity model of an H-plane elliptical waveguide power divider (without transition waveguide) according to an embodiment of the present application;

[0031] Figure 14A simulation and measurement scattering parameter plot of an H-plane elliptical waveguide power divider (including a transition waveguide) provided by an embodiment of the present application is shown in FIG. 1.

[0032] Figure 15 For Figure 14 A close-up view of the transmission coefficient curve.

[0033] In the drawings:

[0034] 1 - power dividing structure; 11 - power divider; 111 - main waveguide; 112 - branch waveguide; 113 - arch structure; 2 - curved waveguide; 21 - H-plane curved waveguide; 22 - E-plane curved waveguide; 31 - first waveguide flange; 32 - second waveguide flange; 33 - rectangular waveguide port; 4 - first transition waveguide; 5 - second transition waveguide. DETAILED DESCRIPTION

[0035] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0036] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0037] It should be understood that the terms "length", "upper", "lower", "front", "back", "left", "right", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0039] Now the elliptical waveguide power divider provided by an embodiment of the present application will be described.

[0040] Please refer to Figures 1 to 3 , Figure 1A perspective view of a three-dimensional structure of an E-plane elliptical waveguide power divider provided in an embodiment of the present application, Figure 2 A perspective view of a three-dimensional structure of an E-plane elliptical waveguide power divider provided in an embodiment of the present application, Figure 1 A perspective view of a three-dimensional structure of an E-plane elliptical waveguide power divider provided in an embodiment of the present application, Figure 3 A perspective view of a three-dimensional structure of an E-plane elliptical waveguide power divider provided in an embodiment of the present application, Figure 1 A perspective view of a three-dimensional structure of an E-plane elliptical waveguide power divider provided in an embodiment of the present application.

[0041] The elliptical waveguide power divider is of a metal shell structure. The elliptical waveguide power divider includes an n-stage power distribution structure 1, where n is an integer greater than or equal to 1, such as an elliptical waveguide power divider including a 1-stage power distribution structure 1, or a 2-stage power distribution structure 1, a 3-stage power distribution structure 1, a 4-stage power distribution structure 1, etc. The n-stage power distribution structure 1 includes 2 n-1 power dividers 11, for example, a 1-stage power distribution structure 1 includes 1 power divider 11, a 2-stage power distribution structure 1 includes 2 power dividers 11, and a 3-stage power distribution structure 1 includes 4 power dividers 11. The power divider 11 includes a main waveguide 111 and two branch waveguides 112, both of which are connected to the main waveguide 111. The power divider 11 is used to separate the electromagnetic wave signal transmitted in the main waveguide 111 into two equal-amplitude and opposite-phase (or in-phase) signals, which are transmitted through the two branch waveguides 112, respectively. In adjacent stages of the power distribution structure 1, the branch waveguide 112 in the n-stage power distribution structure 1 is connected to the main waveguide 111 in the n+1-stage power distribution structure 1 through a curved waveguide 2. The two signals separated by the power divider 11 are transmitted to the corresponding curved waveguide 2 through the corresponding branch waveguide 112. The main waveguide 111, the branch waveguide 112, and the curved waveguide 2 are all elliptical waveguides, and their cross sections are elliptical. This makes the inner cavity of the power divider 11 free of any horizontal suspension structure, and minimizes the waveguide discontinuity structure, so that the inner wall of the metal shell can be self-supported during 3-D printing.

[0042] The elliptical waveguide power divider in the above embodiment uses an elliptical waveguide as the transmission line architecture of the waveguide power divider. The inner cavity is designed to be free of any horizontal suspension structure in the vertical direction, and the waveguide discontinuity structure is minimized. The process principle of 3-D printing is integrated, so that the inner wall of the metal shell can be self-supported during 3-D printing. This significantly improves the quality of the device structure formed integrally by additive manufacturing technology, and the symmetry of the key structure is not destroyed during cavity forming, reducing the deterioration of the radio frequency performance of the device caused by cavity deformation.

[0043] In one embodiment of the present application, please refer to Figures 1 to 3, the power divider 11 is a Y-junction power divider, and is suitable for an E-plane elliptical waveguide power divider, in the Y-junction power divider, the main waveguide 111 and the branch waveguide 112 form a Y shape.

[0044] In the same Y-junction power divider, the included angle between the central axis of the branch waveguide 112 and the central axis of the main waveguide 111 is between 90 degrees and 150 degrees, such as 90 degrees, 100 degrees, 120 degrees, etc., and the included angle between the central axes of the two branch waveguides 112 is between 60 degrees and 180 degrees, such as 100 degrees, 150 degrees, 180 degrees, etc. Figures 1 to 3 In the embodiment shown, the included angle between the central axis of the branch waveguide 112 and the central axis of the main waveguide 111 is 135 degrees, and the included angle between the central axes of the two branch waveguides 112 is 90 degrees.

[0045] In one embodiment of the present application, please refer to Figures 4 to 7 , Figure 4 A perspective structure of an H-plane elliptical waveguide power divider provided by the embodiment of the present application Figure 1 , Figure 5 A perspective structure of an H-plane elliptical waveguide power divider provided by the embodiment of the present application Figure 2 , Figure 6 A perspective structure of an H-plane elliptical waveguide power divider provided by the embodiment of the present application Figure 5 A perspective structure of an H-plane elliptical waveguide power divider provided by the embodiment of the present application Figure 7 A perspective structure of an H-plane elliptical waveguide power divider provided by the embodiment of the present application Figure 5 A perspective structure of an H-plane elliptical waveguide power divider provided by the embodiment of the present application

[0046] In the same T-junction power divider, the included angle between the central axis of the branch waveguide 112 and the central axis of the main waveguide 111 is between 90 degrees and 150 degrees, such as 90 degrees, 100 degrees, 120 degrees, etc., and the included angle between the central axes of the two branch waveguides 112 is between 60 degrees and 180 degrees, such as 100 degrees, 150 degrees, 180 degrees, etc.

[0047] Optionally, the elliptical waveguide power divider further comprises a first transition waveguide 4, a second transition waveguide 5, and a rectangular waveguide port 33. The first transition waveguide 4 is used to transitionally connect the main waveguide 111 to the rectangular waveguide port 33, and the second transition waveguide 5 is used to transitionally connect the branch waveguide 112 to the rectangular waveguide port 33, that is, the entire power distribution structure 1 is connected to the rectangular waveguide port 33 through the first transition waveguide 4 and the second transition waveguide 5.

[0048] In one embodiment of the present application, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 7The connection between the main waveguide 111 and the two sub-waveguides 112 has an arch structure 113. The top of the arch structure 113 is close to the sub-waveguides 112, and the bottom of the arch structure 113 is close to the main waveguide 111. During the 3D printing process, the material stacking direction of the power divider 11 is the extension direction from the main waveguide 111 to the sub-waveguides 112. Therefore, setting the arch structure 113 can eliminate the horizontal suspension structure inside the power divider 11, and its inner wall can be self-supported during the printing process.

[0049] In one embodiment of the present invention, please refer to Figure 1 and Figure 4 The central axes of the main waveguides 111 of each power divider 11 are parallel to each other. That is, in each stage of the power distribution structure 1, the central axes of the main waveguides 111 of the power divider 11 all face the same direction, so that the signals separated by the power divider 11 also transmit in the same direction. In other embodiments, the central axes of the main waveguides 111 of each power divider 11 may not be parallel.

[0050] In one embodiment of the present invention, the elliptical waveguide power divider further includes multiple waveguide flanges, which are respectively disposed at multiple ends of the n-stage power distribution structure 1 to facilitate connection of the elliptical waveguide power divider to external circuits. Each waveguide flange has a rectangular waveguide port 33. It should be noted that the n-stage power distribution structure 1 has 1+2... n One port (one input and two...) n When the waveguides of all output terminals are oriented in the same direction, the output terminals can share a single waveguide flange.

[0051] In particular, please see Figure 1 and Figure 4 The elliptical waveguide power divider includes two waveguide flanges, which are respectively located at both ends of the n-stage power distribution structure 1. Specifically, the two waveguide flanges are a first waveguide flange 31 and a second waveguide flange 32. The first waveguide flange 31 is connected to the main waveguide 111 in the first-stage power distribution structure 1, and a rectangular waveguide port 33 is formed on the first waveguide flange 31. The second waveguide flange 32 is connected to the sub-waveguide 112 in the last-stage power distribution structure 1, and the second waveguide flange 32 consists of 2... n It is composed of two standard waveguide flanges, and the second waveguide flange 32 has 2 openings. n 33 rectangular waveguide ports.

[0052] In one embodiment of the present invention, please refer to Figure 1 and Figure 4, the curved waveguide 2 includes an H-plane curved waveguide 21 and an E-plane curved waveguide 22 connected to each other, the H-plane curved waveguide 21 is connected to the main waveguide 111, and the E-plane curved waveguide 22 is connected to the branch waveguide 112, and the combination of the two curved waveguides 2 improves the compactness and flexibility of the elliptical waveguide power divider structure. In other embodiments, the H-plane curved waveguide 21 can be connected to the branch waveguide 112, or the E-plane curved waveguide 22 can be connected to the main waveguide 111, that is, the connection mode of the curved waveguide 2 with other elliptical waveguide structures is not limited.

[0053] In one embodiment of the present application, the elliptical waveguide power divider is a metal shell with an inner cavity, and the inner cavity is smoothly arranged and formed by a continuous curved surface and a plane. Therefore, there is no discontinuous structure in the interior of the metal shell, and the inner cavity profile is a smooth curved surface. The design process of the elliptical waveguide power divider is completely integrated with the process principle of 3-D printing, the compatibility of the metal shell and the 3-D printing process is very high, and the reliability of the integrated manufacturing by the 3-D printing process is improved.

[0054] Please refer to Figure 8 , Figure 8 The simulated scattering parameter curve of the Y-shaped junction power divider of the E-plane elliptical waveguide power divider provided in the embodiment of the present application is shown in the figure. The reflection coefficient of the main waveguide 111 away from the port of the branch waveguide 112 is less than -25 dB in the Ka full frequency band, and the transmission coefficient curve presents a relatively ideal -3-dB equal power division response.

[0055] Please refer to Figure 9 , Figure 9 The simulated scattering parameter curve of the air cavity model of the E-plane elliptical waveguide power divider (without transition waveguide) provided in the embodiment of the present application is shown in the figure. In the Ka frequency band, the simulated port reflection coefficient is less than -20 dB, and the transmission coefficient is (-6.0±0.3) dB.

[0056] In all embodiments of the present application, the simulated port reflection coefficient of the first transition waveguide 4 and the second transition waveguide 5 is less than -20 dB, indicating that the introduction of the first transition waveguide 4 and the second transition waveguide 5 has little effect on the transmission performance of the elliptical waveguide power divider itself, which can be ignored.

[0057] Please refer to Figure 10 and Figure 11 , Figure 10 The simulated and measured scattering parameter curve of the E-plane elliptical waveguide power divider (with transition waveguide) provided in the embodiment of the present application is shown in the figure, Figure 11 for Figure 10The zoomed-in view of the transmission coefficient curve. It can be seen that in the Ka full band, the measured and simulated scattering parameter curves of the E-plane elliptical waveguide power divider are consistent, verifying the accuracy of the simulation results and the reliability of the processing technology, and also verifying the excellent radio frequency performance of the elliptical waveguide power divider. In the Ka full band, the measured port reflection coefficient is less than -17 dB, and the measured transmission coefficient is (-6.5 ± 0.6) dB.

[0058] Referring to Figure 12 , Figure 12 The simulated scattering parameter curve of the T-junction power divider of the H-plane elliptical waveguide power divider provided by the embodiment of the application. The T-junction power divider is excited at the port of the main waveguide 111 away from the waveguide 112, and the simulated reflection coefficient of the port is less than -20 dB in most of the Ka frequency range, and the transmission coefficient curve presents a relatively ideal -3-dB equal power division response.

[0059] Referring to Figure 13 , Figure 13 The simulated scattering parameter curve of the air cavity model of the H-plane elliptical waveguide power divider (without transition waveguide) provided by the embodiment of the application, the simulated port reflection coefficient is less than -20 dB in most of the Ka frequency range, and the transmission coefficient is (-6.5 ± 0.15) dB.

[0060] Referring to Figure 14 and Figure 15 , Figure 14 The simulated and measured scattering parameter curve of the H-plane elliptical waveguide power divider (with transition waveguide) provided by the embodiment of the application, Figure 15 is Figure 14 The zoomed-in view of the transmission coefficient curve. It can be seen that in the Ka full band, the measured and simulated scattering parameter curves of the H-plane elliptical waveguide power divider are consistent, verifying the accuracy of the simulation results and the reliability of the processing technology, and also verifying the excellent radio frequency performance of the elliptical waveguide power divider. In the Ka full band, the measured port reflection coefficient is less than -15 dB, and the measured transmission coefficient is (-6.9 ± 0.6) dB.

[0061] Figures 8 to 15 The partial key dimensions of the elliptical waveguide power divider used in the embodiment are as follows:

[0062] (1) The rectangular waveguide port 33 has a wide edge length of 7.112 mm and a narrow edge length of 3.556 mm;

[0063] (2) The first transition waveguide 4 and the second transition waveguide 5 have a length of 6 mm;

[0064] (3) Y junction power divider: the length of the main waveguide 111 is 11 mm, the bending angle of the branch waveguide 112 is 45 degrees, the curvature radius is 4.6 mm, and the length of the branch waveguide 112 is 5.027 mm;

[0065] (4) T junction power divider: the length of the main waveguide 111 is 8 mm;

[0066] (5) Elliptical waveguide port: the length of the long axis is 7.45 mm, and the length of the short axis is 3.6 mm.

[0067] It needs to be emphasized again that first, the elliptical waveguide power divider provided by the embodiment of the application is designed by combining the process principle of 3-D printing, has a smooth curved surface profile, and there is no any discontinuous structure in the cavity. The elliptical waveguide power divider can be integrally manufactured by additive manufacturing without using support, and the structure has high compatibility with the 3-D printing process. Further, the first waveguide flange plate 31 and the second waveguide flange plate 32 can be shaped to reduce their weight and reduce the use of support material in the forming process. Figure 1 and Figure 6 As shown in the vertical direction, the structure symmetry of the power divider 11 can be maintained, and the deterioration of the 3-D printing structure to the radio frequency performance of the device is minimized.

[0068] In order to verify that the elliptical waveguide power divider provided by the application has superior radio frequency performance, the elliptical waveguide power divider in the embodiment of the application is subjected to full-wave electromagnetic simulation, processing and radio frequency measurement. The device uses photosensitive resin as a structural material and is integrally 3-D printed by using a multi-jet inkjet process. The printing direction is the oz direction shown in Figure 1 and Figure 6 After printing, the media support inside and outside the model can be heated and melted for removal. The removal of the support will not damage the structure of the device itself, so the integrated molding of the model is not restricted by the generation position and number of supports. Finally, the model is polished and cleaned, and the entire surface of the model is plated with copper to obtain the final device.

[0069] In the embodiments provided by the present application, it should be understood that first, the disclosed shaping design method and typical shaping structure can be universally applied to other types of microwave broadband or narrowband devices. For example, the elliptical waveguide can be widely applied to passive devices such as couplers, magic T and filters. Second, the cavity geometry and size involved in shaping are only illustrative, and in actual application, the cavity structure used for shaping can be flexibly selected according to the radio frequency index, the space size, the electromagnetic wave mode distribution law and the like. For example, the structure of the power divider 11 can be further optimized, the size of the elliptical waveguide and the transition waveguide can be scaled according to the working frequency band of the device, and the orientation of the waveguide output port can be customized according to the application requirement. Third, the disclosed shaping structure is suitable for various non-metal / metal 3-D printing processes and printing materials, and the universality of the structure design method is strong.

[0070] The above is the description of the elliptical waveguide power divider provided by the present application. For those skilled in the art, according to the idea of the embodiments of the present application, there will be changes in the specific implementation and application range. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An elliptical waveguide power divider, characterized in that: It includes an n-level power allocation structure, where n is an integer greater than or equal to 1, and the nth level power allocation structure includes 2 n-1 A power divider includes a main waveguide and two sub-waveguides connected to the main waveguide. The sub-waveguides in the nth-level power distribution structure are connected to the main waveguide in the (n+1)th-level power distribution structure via curved waveguides. The main waveguide, the sub-waveguides, and the curved waveguides are all elliptical waveguides with elliptical cross-sections. In the same power divider, the connection between the main waveguide and the two sub-waveguides has an arch structure, with the top of the arch structure close to the sub-waveguides and the bottom of the arch structure close to the main waveguide. During the 3D printing process, the material stacking direction of the power divider is the extension direction from the main waveguide to the sub-waveguide.

2. The elliptical waveguide power divider as described in claim 1, characterized in that: The central axes of the main waveguides of each of the power dividers are parallel to each other.

3. The elliptical waveguide power divider as described in claim 1, characterized in that: The elliptical waveguide power divider has rectangular waveguide ports at both ends, and the power distribution structure is connected to the rectangular waveguide ports via a transition waveguide.

4. The elliptical waveguide power divider as described in claim 1, characterized in that: The curved waveguide includes interconnected... E Surface curved waveguide and H Surface-curved waveguide, and the E The curved waveguide is connected to the main waveguide, and the H A curved waveguide is connected to the sub-waveguide, or, the E The curved waveguide is connected to the sub-waveguide, and the H A curved waveguide is connected to the main waveguide.

5. The elliptical waveguide power divider as described in any one of claims 1-4, characterized in that: The elliptical waveguide power divider is a metal housing with an inner cavity, which is smoothly arranged.

6. The elliptical waveguide power divider as described in any one of claims 1-4, characterized in that: The power divider is a Y-junction power divider.

7. The elliptical waveguide power divider as described in claim 6, characterized in that: In the same Y-junction power divider, the angle between the central axis of the sub-waveguide and the central axis of the main waveguide is between 90 degrees and 150 degrees, and the angle between the central axes of the two sub-waveguides is between 60 degrees and 180 degrees.

8. The elliptical waveguide power divider as described in any one of claims 1-4, characterized in that: The power divider is a T-junction power divider.

9. The elliptical waveguide power divider as described in claim 8, characterized in that: In the same T-junction power divider, the angle between the central axis of the sub-waveguide and the central axis of the main waveguide is between 90 degrees and 150 degrees, and the angle between the central axes of the two sub-waveguides is between 60 degrees and 180 degrees.

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