Radio frequency microwave power synthesis device
By introducing a heat dissipation part into the RF microwave power synthesis device, connecting the combined unit with the metal shell, the heat dissipation problem in high-power applications is solved, and higher power tolerance and smaller size are achieved.
Patent Information
- Application Number
- CN202420616108.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-28
AI Technical Summary
Existing RF/microwave power synthesis devices are unbearable in high-power applications and cannot effectively dissipate heat, resulting in high temperature burnout.
A radio frequency microwave power synthesis device is designed, and the combined unit is connected to the metal shell by introducing a heat dissipation unit, and the electric length of the heat dissipation part is 0.15 to 0.5 working wavelength, preferably 0.25 working wavelength, so as to achieve rapid transmission and dissipation of heat.
It effectively reduces the temperature of the power synthesis device, improves its power tolerance, can withstand greater power and small size, and has a small impact on the transmission and loss of RF/microwave signals.
Smart Images
Figure CN222621419U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of radio frequency microwaves, in particular to a radio frequency microwave power synthesis device. Background Art
[0002] Existing RF / microwave power synthesis devices are difficult to withstand high-power applications, such as above 10KW. Even if they can be used for high-power applications, they need to have a lot of redundancy in the design, resulting in an unacceptable size.
[0003] In addition, under high power, traditional RF / microwave synthesis devices are unable to quickly transfer the heat generated by the synthesis device itself, causing it to generate high temperatures under high power and burn out.
[0004] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application, nor does it necessarily provide technical guidance. In the absence of clear evidence that the above content has been disclosed before the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content
[0005] The utility model aims to provide a radio frequency microwave power synthesis device, which can quickly transfer the heat generated by the radio frequency / microwave synthesis device to the outside of the synthesis device to achieve heat dissipation, thereby reducing the temperature of the power synthesis device, thereby improving its power tolerance, and can withstand greater power synthesis with a small size.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0007] A radio frequency microwave power synthesis device, used for synthesizing the power of multiple radio frequency signals or microwave signals, comprising a housing and a synthesis unit, wherein the housing is made of metal material;
[0008] The combining unit includes a first conductor, a plurality of second conductors and a heat sink, wherein the first conductor is arranged inside the housing, and includes a first conductor post and a second conductor post which are coaxially arranged, wherein one end of the first conductor post is connected to one end of the second conductor post, and the other end of the second conductor post is configured as an output end, and the other end of the first conductor post is configured to be connected to one end of the heat sink, and the other end of the heat sink is configured to be connected to the housing, and the heat sink is made of a metal material, and its electrical length is 0.15 to 0.5 working wavelengths;
[0009] A plurality of second conductors are distributed along the radial direction of the first conductor, and one end of each of the second conductors passes through the housing and is connected to the first conductor column, and the other end of each of the second conductors is configured as an input end.
[0010] Further, based on any one of the technical solutions or a combination of multiple technical solutions mentioned above, the electrical length of the heat dissipation part is 0.25 working wavelengths.
[0011] Further, based on any one of the technical solutions or a combination of multiple technical solutions described above, the cross-sectional area of the second conductor column is smaller than the cross-sectional area of the first conductor column, so that the input impedance and output impedance of the radio frequency microwave power synthesis device are matched.
[0012] Further, according to any one of the above technical solutions or a combination of multiple technical solutions, a plurality of the second conductors are arranged in the same plane; and / or,
[0013] The connection points of the second conductors and the first conductor are points that equally divide the cross-sectional circumference of the first conductor.
[0014] Further, based on any one of the technical solutions or a combination of multiple technical solutions mentioned above, the cross-section of one end of the heat dissipation portion connected to the first conductor column is the same as the cross-section of the first conductor column, and the heat dissipation portion has an outwardly expanding structure in a direction close to the outer shell.
[0015] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the first conductor and the second conductor are cylindrical structures, and the heat dissipation portion is an outwardly expanding truncated cone structure; or,
[0016] The first conductor and the second conductor are cylindrical structures, and the heat dissipation portion is a combined structure of a cylinder and a truncated cone.
[0017] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the heat dissipation portion is a columnar structure, and the cross section of the heat dissipation portion is the same as the cross section of the first conductor column;
[0018] Each of the second conductors has a diameter-reducing structure in which a cross-sectional size decreases in a direction approaching the first conductor, so that the impedance thereof exceeds 50 ohms.
[0019] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the first conductor is one of a cylinder, a square cylinder or a polygonal cylinder; and / or,
[0020] The second conductor is one of a circular column, a square column or a polygonal column; and / or,
[0021] The heat dissipation portion is one of a circular column, a square column or a polygonal column.
[0022] Further, based on any one of the above technical solutions or a combination of multiple technical solutions, the housing includes a first cylindrical shell and a second cylindrical shell that are coaxially arranged, the axis of the first cylindrical shell and the second cylindrical shell coincides with the axis of the first conductor, and the cross-sectional area of the second cylindrical shell is smaller than the cross-sectional area of the first cylindrical shell;
[0023] The input ends of the plurality of second conductors pass through the side surface of the first cylindrical shell and are connected to the outside;
[0024] One end of the second cylindrical shell is connected to one end of the first cylindrical shell, and the other end is provided with a first window for connecting the output end to the outside.
[0025] Further, based on any one of the technical solutions or a combination of multiple technical solutions mentioned above, a third shell is arranged at one end of the second cylindrical shell away from the first cylindrical shell, and the third shell is a rectangular shell connected to the second cylindrical shell, and a second window for connecting the output end to the outside is arranged on the side of the rectangular shell.
[0026] Furthermore, any one of the technical solutions or a combination of multiple technical solutions described above also includes a plurality of connectors, wherein the connectors correspond one-to-one to the second conductors, one end of each of the connectors is arranged outside the housing, and the other end thereof passes through the housing and is connected to one of the second conductors.
[0027] The beneficial effects brought by the technical solution provided by the utility model are as follows:
[0028] a. The utility model connects the combiner unit and the metal shell by introducing a heat dissipation part, so that the heat generated by the combiner unit during operation can be transferred to the shell in time, and then the heat is dissipated from the shell to the surrounding environment by convection and radiation, thereby reducing the temperature of the power combiner device, thereby improving its tolerable power capacity;
[0029] b. The utility model designs the electrical length of the heat dissipation portion to be 0.15 to 0.5 working wavelengths, preferably 0.2-0.3 working wavelengths, and more preferably 0.25 working wavelengths, so that the heat dissipation design has little effect on the transmission and loss of RF / microwave signals, so that the power synthesis device can simultaneously meet the requirements of high-power application and system reliability;
[0030] e. The power synthesis device provided by the utility model has a simple and compact structure, low manufacturing cost and can be made into a small size. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0032] Figure 1 A schematic diagram of the three-dimensional structure of a radio frequency microwave power synthesis device provided as an exemplary embodiment of the utility model;
[0033] Figure 2 A cross-sectional schematic diagram of a power synthesis device with a heat dissipation portion having a cylindrical structure provided by an exemplary embodiment of the utility model;
[0034] Figure 3 A cross-sectional schematic diagram of a power synthesis device with a heat dissipation portion having a truncated cone structure provided by an exemplary embodiment of the utility model;
[0035] Figure 4 A comparison diagram of the amplitudes of eighteen input signals of a power synthesis device provided by an exemplary embodiment of the utility model;
[0036] Figure 5 A phase comparison diagram of eighteen input signals of a power synthesis device provided by an exemplary embodiment of the utility model.
[0037] Among them, the figure marks include: 1-housing, 11-first cylindrical shell, 12-second cylindrical shell, 13-third shell, 131-second window, 2-combining unit, 21-first conductor, 22-second conductor, 211-first conductor column, 212-second conductor column, 23-heat dissipation part, 3-connector. DETAILED DESCRIPTION
[0038] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.
[0040] In one embodiment of the present invention, a radio frequency microwave power synthesis device is provided for synthesizing the power of multiple radio frequency signals or microwave signals. Figures 1 to 3 The radio frequency microwave power synthesis device comprises a housing 1 and a combining unit 2, wherein the housing 1 is made of metal material;
[0041] The combining unit 2 includes a first conductor 21, a plurality of second conductors 22 and a heat dissipation portion 23. The first conductor 21 is arranged inside the housing 1, and includes a first conductor column 211 and a second conductor column 212 which are coaxially arranged. One end of the first conductor column 211 is connected to one end of the second conductor column 212, and the other end of the second conductor column 212 is configured as an output end. The other end of the first conductor column 211 is configured to be connected to one end of the heat dissipation portion 23, and the other end of the heat dissipation portion 23 is configured to be connected to the housing 1. The heat dissipation portion 23 is made of a metal material, and its electrical length is 0.15 to 0.5 working wavelengths. Preferably, the electrical length of the heat dissipation portion 23 is 0.25 working wavelengths.
[0042] A plurality of second conductors 22 are distributed along the radial direction of the first conductor 21 , and one end of each second conductor 22 passes through the housing 1 to be connected to the first conductor post 211 , and the other end of each second conductor 22 is configured as an input end.
[0043] It should be noted that the electrical length of the heat dissipation portion 23 is the ratio of its physical length to the operating wavelength. The physical length of the heat dissipation portion 23 is the length of its side. If the heat dissipation portion 23 is a multi-stage variable diameter structure, its physical length is the sum of the side lengths of each stage in the multi-stage variable diameter structure. The operating wavelength is the wavelength of the radio frequency signal or microwave signal transmitted by the power synthesis device.
[0044] The utility model introduces a heat dissipation part 23, which connects the combiner unit 2 and the metal shell 1, so that the heat generated by the combiner can be transferred to the ground, that is, the shell in time, and then the heat is dissipated from the shell to the surrounding environment through convection and radiation, thereby reducing the temperature of the power combining device, thereby improving its tolerable power capacity.
[0045] In addition, by designing the electrical length of the heat dissipation portion 23 to be 0.15 to 0.5 of the working wavelength, the heat dissipation design has little effect on the transmission and loss of radio frequency signals and microwave signals.
[0046] In this embodiment, the first conductor 21 is one of a cylinder, a square column or a polygonal column. The second conductor 22 is one of a cylinder, a square column or a polygonal column. The heat dissipation portion 23 is one of a cylinder, a square column or a polygonal column. The heat dissipation portion 23 is a columnar structure, and the cross section of the heat dissipation portion 23 is the same as the cross section of the first conductor column 211. Thus, the electrical performance of the radio frequency microwave power synthesis device can be improved. More preferably, the heat dissipation portion 23 has an outward expansion structure in the direction close to the housing 1 to increase the contact area between the heat dissipation portion 23 and the housing 1, thereby improving the heat dissipation performance of the device.
[0047] In one embodiment of the present invention, the first conductor 21 and the second conductor 22 are both cylindrical structures. A plurality of the second conductors 22 are arranged in the same plane; and the connection points of the plurality of the second conductors 22 and the first conductor 21 are the points that equally divide the cross-section circumference of the first conductor 21.
[0048] In this embodiment, the structures of the heat dissipation portion 23 are preferably the following three.
[0049] The first one is Figure 2 As shown, the heat dissipation portion 23 is also a cylindrical structure, and its cross-sectional area is the same as the cross-sectional area of the first conductor 21. That is, the first conductor 21 extends in a direction away from the second conductor 22 until it contacts the housing 1. The heat dissipation portion 23 of this structure can reduce the manufacturing cost of the combining unit 2. In this embodiment, the physical length of the heat dissipation portion 23 is the side length of its cylindrical structure.
[0050] The second type Figure 3 As shown, the heat dissipation portion 23 is a combination structure of a truncated cone and a cylinder. The order in which the truncated cone and the cylinder are close to the first conductor 21 is not limited. The advantage of this structure is that it can increase the contact area between the heat dissipation portion 23 and the housing 1 and improve the heat dissipation speed. In this embodiment, the physical length of the heat dissipation portion 23 is the sum of the side length of its cylindrical structure and the side length of the truncated cone structure.
[0051] The third type is that the heat dissipation portion 23 is a truncated cone structure, that is, the heat dissipation portion 23 has no Figure 3 The cylindrical section connected to the housing 1 shown in the figure is directly in contact with the housing 1 through the truncated cone. The advantage of this structure is that the contact area between the heat dissipation portion 23 and the housing 1 is increased as much as possible while taking into account the manufacturing cost, so as to improve the heat dissipation speed. In this embodiment, the physical length of the heat dissipation portion 23 is the side length of its truncated cone structure.
[0052] In one embodiment of the utility model, the cross-sectional area of the second conductor post 212 is smaller than the cross-sectional area of the first conductor post 211, so that the input impedance and the output impedance of the radio frequency microwave power synthesis device are matched. The higher the impedance of the first conductor post 211, the smaller the impedance (50 ohms) transformation ratio from the first conductor post 211 to the second conductor post 212, and the wider the working bandwidth of the power synthesis device. Preferably, by setting the cross-sectional areas of the second conductor post 212 and the first conductor post 211, the impedance of the junction point is increased, and the impedance transformation ratio from the junction point to 50 ohms is reduced, so that a wider working bandwidth can be achieved. Wherein, the junction point is the connection between the second conductor post 212 and the first conductor post 211.
[0053] More preferably, each of the second conductors 22 has a variable diameter structure, which has a structure with a smaller cross-sectional size in the direction where the second conductor 22 approaches the first conductor 21, so as to increase the impedance of the branch section so that its impedance exceeds 50 ohms, preferably 100 ohms and above.
[0054] In this embodiment, the structure of the housing 1 corresponds to the structure of the first conductor 21 and the second conductor 22, and includes a first cylindrical shell 11 and a second cylindrical shell 12 arranged coaxially, the axis of the first cylindrical shell 11 and the second cylindrical shell 12 coincide with the axis of the first conductor 21, and the cross-sectional area of the second cylindrical shell 12 is smaller than the cross-sectional area of the first cylindrical shell 11. The input ends of the plurality of second conductors 22 pass through the side of the first cylindrical shell 11 and are connected to the outside. One end of the second cylindrical shell 12 is connected to one end of the first cylindrical shell 11, and the other end is provided with a first window for the output end to be connected to the outside.
[0055] Preferably, a third shell 13 is provided at one end of the second cylindrical shell 12 away from the first cylindrical shell 11, and the third shell 13 is a rectangular shell connected to the second cylindrical shell 12, and a second window 131 for connecting the output end to the outside is provided on the top or side of the rectangular shell.
[0056] In addition, the power synthesis device further includes a plurality of connectors 3 , each of which corresponds to the second conductors 22 one by one, one end of each of the connectors 3 being arranged outside the housing 1 , and the other end thereof passing through the housing 1 to be connected to one of the second conductors 22 .
[0057] Preferably, forced air cooling or water cooling may be added outside the housing of the power combining device to further improve its power resistance capability and achieve greater power tolerance.
[0058] The utility model provided for the radio frequency microwave power synthesis device is suitable for a power synthesis device with a coaxial structure, and at the same time integrates coaxial waveguide conversion, and has a simple structure and is easy to implement. The outer shell can be a split structure and can be assembled with screws. The heat dissipation part and the outer shell, the first conductor and the second conductor in the combining unit can be assembled with screws, and can be applied to multi-channel power synthesis. By increasing the heat dissipation 23, the heat dissipation of the power synthesis device can be greatly improved, and its power resistance capability can be improved. The electrical length of the heat dissipation part is determined to be 0.25, which can ensure the signal transmission energy. In one embodiment of the utility model, the power synthesis device provided by the utility model is used to synthesize 18 signals, see Figure 4 , the amplitude consistency of the 18-channel signals is good; see Figure 5 , the amplitude consistency of the 18-way signal is good. It can be seen that the power synthesis device can meet the needs of high-power application and system reliability at the same time.
[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0060] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.
Claims
1. A radio frequency microwave power synthesis device, characterized in that: Used for synthesizing the power of multiple radio frequency signals or microwave signals, comprising a housing (1) and a combining unit (2), wherein the housing (1) is made of a metal material; The combining unit (2) comprises a first conductor (21), a plurality of second conductors (22) and a heat dissipation portion (23); the first conductor (21) is arranged inside the housing (1), and comprises a first conductor post (211) and a second conductor post (212) which are coaxially arranged; one end of the first conductor post (211) is connected to one end of the second conductor post (212); the other end of the second conductor post (212) is configured as an output end; the other end of the first conductor post (211) is configured to be connected to one end of the heat dissipation portion (23); the other end of the heat dissipation portion (23) is configured to be connected to the housing (1); the heat dissipation portion (23) is made of a metal material, and its electrical length is 0.15 to 0.5 working wavelengths; A plurality of second conductors (22) are distributed along the radial direction of the first conductor (21), and one end of each second conductor (22) passes through the housing (1) to be connected to the first conductor column (211), and the other end of each second conductor (22) is configured as an input end.
2. The radio frequency microwave power synthesis device according to claim 1, characterized in that: The electrical length of the heat dissipation portion (23) is 0.25 working wavelengths.
3. The radio frequency microwave power synthesis device according to claim 1, characterized in that: The cross-sectional area of the second conductor column (212) is smaller than the cross-sectional area of the first conductor column (211), so that the input impedance and output impedance of the radio frequency microwave power synthesis device are matched.
4. The radio frequency microwave power synthesis device according to claim 1, characterized in that: A plurality of the second conductors (22) are arranged in the same plane; and / or, The connection points of the plurality of second conductors (22) and the first conductor (21) are equally divided points of the cross-sectional circumference of the first conductor (21).
5. The radio frequency microwave power synthesis device according to claim 1, characterized in that: The cross section of one end of the heat dissipation portion (23) connected to the first conductor post (211) is the same as the cross section of the first conductor post (211), and the heat dissipation portion (23) has an outwardly expanding structure in a direction approaching the housing (1).
6. The radio frequency microwave power synthesis device according to claim 5, characterized in that: The first conductor (21) and the second conductor (22) are cylindrical structures, and the heat dissipation portion (23) is an outwardly expanding truncated cone structure; or, The first conductor (21) and the second conductor (22) are cylindrical structures, and the heat dissipation portion (23) is a combined structure of a cylinder and a truncated cone.
7. The radio frequency microwave power synthesis device according to claim 1, characterized in that: The heat dissipation portion (23) is a columnar structure, and the cross section of the heat dissipation portion (23) is the same as the cross section of the first conductor column (211); Each of the second conductors (22) has a diameter-reducing structure in which the cross-sectional size decreases in the direction approaching the first conductor (21), so that the impedance thereof exceeds 50 ohms.
8. The radio frequency microwave power synthesis device according to claim 1, characterized in that: The first conductor (21) is one of a circular column, a square column or a polygonal column; and / or, The second conductor (22) is one of a circular column, a square column or a polygonal column; and / or, The heat dissipation portion (23) is one of a circular column, a square column or a polygonal column.
9. The radio frequency microwave power synthesis device according to claim 1, characterized in that: The housing (1) comprises a first cylindrical shell (11) and a second cylindrical shell (12) which are coaxially arranged, the axis center lines of the first cylindrical shell (11) and the second cylindrical shell (12) coincide with the axis center line of the first conductor (21), and the cross-sectional area of the second cylindrical shell (12) is smaller than the cross-sectional area of the first cylindrical shell (11); The input ends of the plurality of second conductors (22) pass through the side surface of the first cylindrical shell (11) and are connected to the outside; One end of the second cylindrical shell (12) is connected to one end of the first cylindrical shell (11), and the other end is provided with a first window for connecting the output end to the outside.
10. The radio frequency microwave power synthesis device according to claim 9, characterized in that: A third shell (13) is arranged at one end of the second cylindrical shell (12) away from the first cylindrical shell (11); the third shell (13) is a rectangular parallelepiped shell connected to the second cylindrical shell (12); a second window (131) for connecting the output end to an external connection is arranged on a side surface of the rectangular parallelepiped shell.
11. The radio frequency microwave power synthesis device according to claim 1, characterized in that: It also includes a plurality of connectors (3), wherein the connectors (3) correspond to the second conductors (22) one by one, and one end of each of the connectors (3) is arranged outside the housing (1), and the other end thereof passes through the housing (1) and is connected to one of the second conductors (22).