CN116780147A - Microwave high-frequency power synthesis cavity - Google Patents
Microwave high-frequency power synthesis cavity Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
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Abstract
The application relates to a cavity for synthesizing microwave high-frequency power, which relates to the technical field of radio frequency microwaves. The transmission signal is sequentially distributed, amplified and synthesized through the signal input cavity, the signal amplification cavity and the signal output cavity, the cavity can obtain high-frequency power, the transmission efficiency is high, the stability is strong, the transmission loss is low, in addition, compared with a rectangular waveguide cavity with the same high power, the size is much smaller, the space utilization rate of the cavity is improved, and the cavity has the advantages of being wide in frequency band, high in power, low in insertion loss, high in efficiency, miniaturized and the like.
Description
Technical Field
The application relates to the field of radio frequency microwaves, in particular to a cavity for synthesizing microwave high-frequency power.
Background
In radio frequency microwaves, a microwave power synthesis technology is an important unit, the power synthesis technology is to combine two or more power amplifying devices, and on the basis of single power amplification, a plurality of amplified power outputs are overlapped through certain measures, so that the required higher-grade power is obtained. The power combining techniques include three types of power combining techniques, die power combining, circuit type power combining, and space power combining. In the field of circuit synthesis, the method is divided into resonant power synthesis and non-resonant power synthesis, and in the resonant power synthesis, a resonant cavity is mainly divided into rectangular waveguide cavity resonant synthesis and cylindrical cavity resonant synthesis.
The synthesis technology has various realization forms and various advantages, for example, when the rectangular waveguide cavity is used as a power combiner, two paths of microwave signals can be input through a microstrip port, the rectangular waveguide is used as a main line and a subsidiary line, air is usually used as a medium in the rectangular waveguide, the rectangular waveguide can be coupled with small-power signals through gaps or small holes among a plurality of partition walls, and the small-hole coupling is utilized to finish power coupling in the waveguide cavity.
However, in the above scheme, the hole coupling principle can only couple out low-power signals, the small-hole coupling cannot pass through high-power signals, and the transmission efficiency is reduced.
Disclosure of Invention
Based on this, it is necessary to provide a cavity for synthesizing microwave high-frequency power, which has the advantages of high transmission efficiency, high stability, low transmission loss, much smaller volume compared with the rectangular waveguide cavity with the same high power, improved space utilization, wide frequency band, high power, low insertion loss, high efficiency, miniaturization and the like.
The application provides a cavity for synthesizing microwave high-frequency power, which comprises a signal input cavity, a signal amplification cavity, a signal output cavity and a signal regulating part, wherein the signal input cavity is used for accessing transmission signals and uniformly distributing the transmission signals into multiple paths, the signal amplification cavity is communicated with the signal input cavity, the signal amplification cavity comprises a plurality of amplification channels and amplification components arranged on the amplification channels, the amplification channels can respectively acquire transmission signals, the amplification components can amplify the transmission signals until preset gains, the signal output cavity is communicated with the amplification channels and are used for acquiring amplified signals output from the signal amplification cavity and synthesizing the amplified signals to generate synthesized signals, the signal regulating part is arranged on the inner wall of the signal input cavity and/or the inner wall of the signal output cavity, and the signal regulating part can perform impedance transformation on the transmission signals and/or the amplified signals so as to enable the signal sizes of the transmission signals and/or the signal sizes of the amplified signals to be consistent. The signal input cavity can uniformly distribute initial transmission signals into two paths, meanwhile, the initial transmission signals are further uniformly distributed into two paths of transmission signals by means of the signal regulating piece, the two paths of transmission signals, the power and the impedance are consistent, the stability of the whole cavity is further improved, the transmission loss is further reduced, after that, all paths of transmission signals are sequentially amplified and synthesized by the signal amplifying cavity and the signal output cavity, the power superposition and synthesis of a plurality of input signals are realized to obtain enough output power, in addition, the volume of the cavity is much smaller than that of the cavity with the same high power, the space utilization rate of the cavity is improved, the cavity can work in the range of 26.5GHz-40GHz in the working frequency band, the working frequency band of the cavity is increased, and the cavity has the advantages of being compatible with wide frequency band, high power, low insertion loss, high efficiency, miniaturization and the like.
In one embodiment, the signal input cavity and the signal output cavity each include a first transmission channel and a plurality of second transmission channels in communication with the first transmission channel, each of the second transmission channels being capable of communicating with a corresponding amplification channel, respectively. When the initial transmission signal is introduced into the first transmission channel, the second transmission channel can divide the initial transmission signal into two paths, and the design does not need to use a traditional two-path power dividing synthesizer to divide and synthesize the signals, so that the overall size requirement is reduced, and a plurality of devices are avoided being introduced.
In one embodiment, the two second transmission channels are configured to be two, the two second transmission channels are symmetrically arranged by taking the first transmission channel as a central axis, the two second transmission channels comprise a first side wall connected with the first transmission channel and a second side wall connected with the amplifying channel, and the distance between the first side wall and the second side wall is gradually increased from a plane away from the first transmission channel. When the initial transmission signal passes through the first side wall and the second side wall, the two first side walls and the two second side walls are completely consistent in structure and size, so that the first side walls and the second side walls can enable the initial transmission signal to achieve reasonable impedance transformation, meanwhile, the initial transmission signal is further uniformly distributed into two paths of transmission signals by means of the signal adjusting piece, the two paths of transmission signals, the power and the impedance are consistent, the stability of the whole cavity is further improved, and the transmission loss is further reduced.
In one embodiment, the angle between the connection surface formed between the first side wall and the inner wall of the first transmission channel is set to 150-170 degrees, and the lengths of the first side wall and the second side wall are set to 9mm-12mm. The cavity with the above size is simulated, the transmission loss is small, and the better performance index is achieved.
In one embodiment, the signal conditioning element includes a protrusion structure, where the protrusion structure is symmetrically disposed between the two second transmission channels with the first transmission channel as a central axis, so that the signal sizes of the transmission signals in each channel are consistent and/or the signal sizes of the amplified signals in each channel are consistent. Through protruding structure, realized reasonable impedance transformation, can make initial transmission signal evenly divide into two-way, satisfy the operational requirement.
In one embodiment, the cross section of the protruding structure is triangular, the protruding structure comprises a first side and a second side which are connected with the second side wall, the first side and the second side are symmetrically arranged by taking the first transmission channel as a central axis, an included angle of a connecting surface formed by the first side and the second side wall is configured to be 130 degrees to 170 degrees, the maximum distance between the first side and the first side is 1mm to 2mm wider than the width of a through hole of the first transmission channel, and the shortest distance between the protruding structure and the first side wall is set to be 2mm to 4mm. The cavity with the above size is simulated, the transmission loss is small, and the better performance index is achieved.
In one embodiment, the length, width and thickness of the signal input and output chambers are 10mm-13mm, 1mm-4mm and 7mm, respectively. The cavity with the above size is simulated, the transmission loss is small, and the better performance index is achieved.
In one embodiment, the amplifying assembly comprises a coupling antenna, a power amplification tube connected with the coupling antenna through a wire and a power supply circuit electrically connected with the power amplification tube, a receiving end of the coupling antenna is used for transmitting a transmission signal to the power amplification tube, the power amplification tube is used for amplifying the transmission signal to generate an amplified signal, an output end of the coupling antenna is used for radiating the amplified signal to the signal output cavity, and the power supply circuit is used for supplying power to the power amplification tube. The receiving end of the coupling antenna is used for transmitting the transmission signal to the power amplification tube, the power amplification tube is used for amplifying the transmission signal to generate an amplified signal, the output end of the coupling antenna is used for radiating the amplified signal to the second transmission channel of the signal output cavity, and the two paths of amplified signals are overlapped and synthesized in the first transmission channel.
In one embodiment, the cavity further comprises a signal absorption cavity arranged towards the power amplification tube, the inner wall of the signal absorption cavity is coated with a signal absorption layer, and the signal absorption layer can absorb useless signals in the frequency range of 26.5GHz-40 GHz. The power amplification tube can effectively amplify power and output, indirectly reduce synthesis loss, facilitate the burning connection of the coupling antenna and the power amplification tube to be fixed in an amplifying channel, improve the grounding performance of the coupling antenna and the power amplification tube and reduce transmission loss.
In one embodiment, the cavity comprises a main cavity and an upper cover body, the signal input cavity, the signal amplifying cavity and the signal output cavity are all arranged on the inner wall of the main cavity, the upper cover body can be adapted to the main cavity, and the main cavity is provided with a plurality of lightening holes. The weight of the whole cavity module is reduced, and the optimization of the weight when a plurality of modules are integrated into a system is facilitated.
Drawings
Fig. 1 is a perspective view of a microwave high frequency power combining cavity in one embodiment.
Fig. 2 is a schematic structural diagram of a main cavity of a microwave high-frequency power synthesis cavity in an embodiment.
Fig. 3 is an enlarged schematic view of a in fig. 2.
Fig. 4 is a schematic structural diagram of an upper cover of a microwave high-frequency power synthesis cavity in an embodiment.
Fig. 5 is a simulation model diagram of a cavity for microwave high frequency power synthesis in an embodiment.
Fig. 6 is a simulation model diagram of another view angle of fig. 5.
Fig. 7 is a graph of return loss and insertion transmission loss parameters of a microwave high frequency power combining cavity in one embodiment.
The reference numerals: 100. a cavity; 10. a main cavity; 11. a signal input cavity; 111. a first transmission channel; 112. a second transmission channel; 1121. a first sidewall; 1122. a second sidewall; 12. a signal amplifying cavity; 121. an amplification channel; 122. an amplifying assembly; 1221. a coupling antenna; 1222. a power amplifier tube; 13. a signal output cavity; 14. a signal conditioning element; 141. a first edge; 142. a second side; 20. an upper cover; 21. a signal absorption cavity; 30. a plug.
Description of the embodiments
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or unit referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.
Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly via an intermediate medium, may be in communication with each other within two units or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.
Before the specific scheme of the embodiment of the application is introduced, the related content of the cavity for synthesizing microwave high-frequency power is briefly introduced. In radio frequency microwaves, a microwave power synthesis technology is an important unit, the power synthesis technology is to combine two or more power amplifying devices, and on the basis of single power amplification, a plurality of amplified power outputs are overlapped through certain measures, so that the required higher-grade power is obtained. When the rectangular waveguide cavity is used as a power combiner, the cavity is required to be small in size and light in weight, and meanwhile, the cavity is required to meet the requirements of high power, low insertion loss, high stability and the like. For these design requirements, how to improve the performance of the cavity is a difficult problem to be solved in the industry. In the existing cavity design, the small hole coupling is generally utilized to finish the power coupling in the waveguide cavity, and the cavity design mode has the problems of low transmission efficiency, large transmission loss, reduced stability and the like. Based on the above, the embodiment of the application provides a cavity for synthesizing microwave high-frequency power, which can solve the technical problems.
Referring to fig. 1 and 2, fig. 1-2 show a schematic diagram of a microwave high-frequency power synthesis cavity in an embodiment of the present application, the cavity 100 includes a main cavity 10 and an upper cover 20, the main cavity 10 and the upper cover 20 are mutually matched, a signal input cavity 11, a signal amplifying cavity 12, a signal output cavity 13 and a signal adjusting member 14 are disposed on a surface of the main cavity 10, the signal input cavity 11, the signal amplifying cavity 12 and the signal output cavity 13 are mutually communicated, and the signal adjusting member 14 is disposed on an inner wall of the signal input cavity 11 and an inner wall of the signal output cavity 13. The signal input cavity 11 can uniformly distribute the initial transmission signal into two paths, meanwhile, the signal adjusting part 14 is used for uniformly distributing the initial transmission signal into two paths of transmission signals, the power and the impedance are consistent, the stability of the whole cavity 100 is further improved, the transmission loss is further reduced, after that, the signals of all paths of transmission signals are sequentially amplified and synthesized through the signal amplifying cavity 12 and the signal output cavity 13, the superposition and synthesis of the power of a plurality of input signals are realized to obtain enough output power, in addition, compared with the cavity 100 with the same high power, the volume is much smaller, the space utilization rate of the cavity 100 is improved, the cavity 100 can work in the range of 26.5GHz-40GHz in the working frequency band, the working frequency band of the cavity 100 is increased, and the cavity 100 has the advantages of wide frequency band, high power, low insertion loss, high efficiency, miniaturization and the like.
The main cavity 10 is provided with a plurality of lightening holes 15, so that the weight of the whole cavity 100 is reduced, the weight of the whole cavity 100 is reduced when the plurality of cavities 100 are integrated into a system, the position selection principle of the lightening holes 15 can not interfere the cavity 100, the size of the lightening holes 15 is unlimited, and the size and the position of the lightening holes 15 can be automatically adjusted according to the lightening requirement on the basis of ensuring the performance of the cavity 100. The main cavity 10 and the upper cover body 20 are detachably connected through the fastener, the fastener can adopt a locating pin, the locating pin is aligned with a locating hole between the main cavity 10 and the upper cover body 20, the locating pin is inserted into the locating hole, the main cavity 10 and the upper cover body 20 are bonded and fastened by means of stainless steel nails or galvanized dovetail nails, the installation error is reduced, and the stainless steel nails or the galvanized dovetail nails are rust-proof and durable and are suitable for indoor and outdoor environments.
As shown in fig. 2-3, in the present embodiment, the structures of the signal input cavity 11 and the signal output cavity 13 are completely identical, each of the signal input cavity and the signal output cavity includes one first transmission channel 111 and two second transmission channels 112, the two second transmission channels 112 are symmetrically disposed with the first transmission channel 111 as a central axis, the first transmission channel 111 and the two second transmission channels 112 are mutually communicated, the signal amplifying cavity 12 includes two amplifying channels 121 and amplifying components 122 disposed in the two amplifying channels 121, and each of the two second transmission channels 112 can be respectively communicated to the corresponding amplifying channel 121. As shown in fig. 2, two ends of the amplifying channel 121 of the present embodiment are respectively communicated with the second transmission channels 112, the number of the signal adjusting members 14 is two, the two signal adjusting members 14 are respectively disposed in the signal input cavity 11 and the signal output cavity 13, and the first transmission channel 111 is symmetrically disposed between the two second transmission channels 112 by taking the first transmission channel 111 as a central axis. When the initial transmission signal is introduced into the first transmission channel 111, the two second transmission channels 112 can uniformly distribute the initial transmission signal into two paths, meanwhile, by means of the signal adjusting element 14, the initial transmission signal can be subjected to impedance transformation, the initial transmission signal is further uniformly distributed into two paths of transmission signals, the signal size of each path of transmission signal is consistent, the two paths of transmission signals are all fed into the signal amplifying channel 121, the amplifying component 122 can amplify the two paths of transmission signals until a preset gain is achieved, so as to generate high-power amplified signals, the two paths of amplified signals are all fed into the second transmission channel 112 of the signal output cavity 13, meanwhile, the two paths of amplified signals are consistent by means of the signal adjusting element 14, and finally, the two paths of amplified signals are synthesized through the first transmission channel 111 of the signal output cavity 13, so that the synthesized signals are high in stability and high-power synthesized signals are output.
In other embodiments, the number of the second transmission channels 112 and the amplifying channels 121 may be more than two, each second transmission channel 112 is respectively connected to a corresponding amplifying channel 121, the structure and the size of each second transmission channel 112 are the same, the signal conditioning element 14 is disposed on the second transmission channel 112, and the materials and the number of the second transmission channel 112, the amplifying channel 121 and the signal conditioning element 14 are not limited as long as the purpose of uniformly distributing the initial transmission signal is satisfied.
In other embodiments, the signal conditioning element 14 may be separately disposed in the signal input cavity 11 or the signal output cavity 13, for example, when the signal conditioning element 14 is separately disposed in the second transmission channel 112 of the signal input cavity 11, the signal conditioning element 14 can uniformly distribute the initial transmission signal into two paths when the initial transmission signal is introduced into the first transmission channel 111, and the signal size of each path of transmission signal is consistent, so as to achieve the purpose of reducing transmission loss.
As shown in fig. 1-3, the amplifying assembly 122 includes a coupling antenna 1221, a power amplifier tube 1222 and a power supply circuit, wherein the power amplifier tube 1222 is electrically connected with the coupling antenna 1221, the power amplifier tube 1222 is electrically connected with the power supply circuit, the power amplifier tube 1222 is electrically connected with a core penetrating insulator (not shown), the core penetrating insulator is connected with an external power supply through a plug 30 of the main cavity 10, the plug 30 is a power supply interface, the power amplifier tube 1222, the core penetrating insulator and the external power supply form the power supply circuit together, the power supply circuit realizes power supply to the power amplifier tube 1222, the electric energy of the accessed insulator is subjected to voltage stabilization and filtering processing outside, and parasitic capacitance and inductance on the surface of the accessed insulator are removed, so as to reduce the influence of the accessed insulator on the inside of the cavity 100. The receiving end of the coupling antenna 1221 is used for transmitting the transmission signal to the power amplification tube 1222, the power amplification tube 1222 is used for amplifying the transmission signal to generate an amplified signal, the output end of the coupling antenna 1221 is used for radiating the amplified signal into the second transmission channel 112 of the signal output cavity 13, and the two amplified signals are overlapped and synthesized in the first transmission channel 111.
As shown in fig. 2-3, in the present embodiment, the second transmission channel 112 includes a first side wall 1121 connected to the first transmission channel 111 and a second side wall 1122 connected to the amplifying channel 121, and the structures and dimensions of the two first side walls 1121 and the two second side walls 1122 are completely identical to ensure that the original transmission signal can be uniformly distributed into two paths, and in addition, the present embodiment defines that the included angle of the connection surface formed between the first side wall 1121 and the inner wall of the first transmission channel 111 is configured to be 150 ° -170 °, the lengths of the first side wall 1121 and the second side wall 1122 are both configured to be 9mm-12mm, and the shortest distance between the first side wall 1121 and the protruding structure is set to be 2mm-4mm. Under the above-mentioned dimensions, the initial transmission signal enters from the first transmission channel 111, the two second transmission channels 112 uniformly divide the transmission signal of the initial transmission into two paths, when the two paths of transmission signals pass through the two first side walls 1121 respectively, the impedance of the two paths of transmission signals is larger than that of the first transmission channel 111, the distance between the first side walls 1121 and the second side walls 1122 is set to be gradually larger from the plane away from the first transmission channel 111, based on the rectangular waveguide characteristic, the larger the distance between the first side walls 1121 and the second side walls 1122 is, the smaller the impedance of the transmission signal is, and when the two paths of transmission signals are output from the second transmission channels 112, the impedance of the two paths of transmission signals is reduced, and the impedance is transformed to be consistent with the lease impedance of the first transmission channel 111; for example, the impedance of the transmission signal at the first transmission channel 111 is 50 ohms, the impedance of the transmission signal at the first side wall 1121 is 100 ohms, the impedance of the transmission signal from the input end of the first transmission channel 111 to the output end of the second transmission channel 112 is 50 ohms, the impedance of the transmission signal at the input end of the first transmission channel 111 is consistent with the impedance of the transmission signal at the output end of the second transmission channel 112, the transmission signal can transmit the signal power to the coupling antenna 1221 to the maximum extent, the radiation interference when the impedance is not matched is reduced, the transmission loss is low, and the stability of the whole cavity 100 is improved.
As shown in fig. 3, in the present embodiment, the signal conditioning element 14 is a protruding structure with a triangular cross section, the protruding structure includes a first edge 141 and a second edge 142 connected to the second side wall 1122, the entire protruding structure is integrally formed with the inner wall of the second transmission channel 112, and the first edge 141 and the second edge 142 are symmetrically disposed with respect to the first transmission channel 111 as a central axis, so as to ensure that the initial transmission signal can be uniformly distributed when the initial signal passes through the first edge 141 and the second edge 142. Further, the angle between the connection surfaces defined by the first side 141 and the inner wall of the second side wall 1122 is arranged at 130 ° -170 °, and the maximum distance between the first side 141 and the second side 142 is 1mm-2mm wider than the width of the through opening of the first transmission channel 111. Through the size design of this embodiment, the signal conditioning element 14 further distributes the initial transmission signal into two transmission signals, where the two transmission signals, power and impedance are identical, for example, the impedance of the transmission signal in the first transmission channel 111 is 50 ohms, when the initial transmission signal passes through the first edge 141 and the second edge 142, reasonable impedance transformation is implemented, the impedance of the transmission signal in the two second transmission channels 112 is 100 ohms, and appropriate impedance is obtained through impedance transformation, so as to reduce transmission loss.
In other embodiments, the cross section of the protruding structure may not be triangular, and may be a quadrilateral, pentagon, or other polygonal structure, so long as the protruding structure is ensured to be symmetrically distributed with the first transmission channel 111 as a central axis.
The length range, width range and thickness of the signal input cavity 11 and the signal output cavity 13 represent the common length range, width range and thickness of the plane where the first transmission channel 111 and the second transmission channel 112 are located, and the length range, width range and thickness of the signal input cavity 11 and the signal output cavity 13 are set to 10mm-13mm, 1mm-4mm and 7mm.
As shown in fig. 2-4, the upper cover 20 is provided with a signal absorbing cavity 21, the signal absorbing cavity 21 faces the power amplification tube 1222, the inner wall of the signal absorbing cavity 21 is coated with a signal absorbing layer 211, the signal absorbing layer 211 can adopt gold plating or silver and other materials, in the frequency range of 226.5 GHz-40GHz, the signal absorbing layer 211 can absorb useless signals emitted by the power amplification tube 1222, the useless electromagnetic waves are prevented from entering the power amplification tube 1222 to form positive feedback, the self-excitation condition is avoided, so that the power amplification tube 1222 can efficiently perform power amplification output, the synthesis loss is indirectly reduced, meanwhile, the coupling antenna 1221 and the power amplification tube 1222 are conveniently burnt and fixed in the amplifying channel 121, the grounding performance of the coupling antenna 1221 and the power amplification tube 1222 is improved, and the transmission loss is reduced.
As shown in fig. 5-6, in the range of 26.5GHz-40GHz of the working frequency band, a cavity simulation model is constructed based on the above cavity 100 size parameters, and the size parameters set in this embodiment are: the length, width and thickness of the signal input chamber 11 and the signal output chamber 13 were set to 11mm, 3mm and 7mm, the junction angle formed by the first side 141 and the inner wall of the second transmission channel 112 was set to 150 °, the distance between the first side 141 and the second side 142 was set to 2mm, the width of the through opening of the first transmission channel 111 was 3mm, the junction angle formed between the first side wall 1121 and the inner wall of the first transmission channel 111 was set to 160 °, the lengths of the first side wall 1121 and the second side wall 1122 were set to 10mm, and the shortest distance between the first side wall 1121 and the convex structure was set to 3mm.
As shown in FIG. 7, based on the simulation model shown in FIG. 5-6, the acquisition results of each data acquisition point are obtained after the simulation for the preset time, and based on the acquisition results of each data acquisition point, the performance index of the cavity 100 in this embodiment is obtained through analysis, two parameter curves in FIG. 7 represent the return loss and the insertion transmission loss respectively, the abscissa represents the frequency, the ordinate represents the S parameter value, the return loss is greater than or equal to 21.23 dB, the transmission loss is less than or equal to 0.17dB, and the smaller transmission loss can be realized, thereby achieving the better performance index.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (10)
1. A cavity for microwave high frequency power synthesis, the cavity comprising:
the signal input cavity is used for accessing transmission signals and uniformly distributing the transmission signals into multiple paths;
the signal amplifying cavity is communicated with the signal input cavity and comprises a plurality of amplifying channels and amplifying assemblies arranged on the amplifying channels, each amplifying channel can respectively acquire each path of transmission signals, and each amplifying assembly can amplify each path of transmission signals until the preset gain is achieved;
the signal output cavity is communicated with the amplifying channel and is used for acquiring all paths of amplified signals output from the signal amplifying cavity and synthesizing all paths of amplified signals to generate synthesized signals; and
the signal adjusting piece is arranged on the inner wall of the signal input cavity and/or the inner wall of the signal output cavity, and performs impedance transformation on the transmission signals and/or the amplified signals so as to enable the signal sizes of all paths of the transmission signals to be consistent and/or the signal sizes of all paths of the amplified signals to be consistent.
2. The microwave high-frequency power combining cavity according to claim 1, wherein the signal input cavity and the signal output cavity each include a first transmission channel and a plurality of second transmission channels in communication with the first transmission channel, each of the second transmission channels being capable of communicating with a corresponding one of the amplifying channels, respectively.
3. The microwave high-frequency power combining cavity according to claim 2, wherein the second transmission channels are configured to be two, the two second transmission channels are symmetrically arranged with the first transmission channel as a central axis, the two second transmission channels each comprise a first side wall connected with the first transmission channel and a second side wall connected with the amplifying channel, and the distance between the first side wall and the second side wall is gradually increased from a plane away from the first transmission channel.
4. A microwave high-frequency power synthesis cavity according to claim 3, wherein the angle between the connection surfaces formed between the first side walls and the inner walls of the first transmission channels is configured to be 150 ° -170 °, and the lengths of both the first side walls are configured to be 9mm-12mm.
5. A cavity for synthesizing microwave high-frequency power according to claim 3, wherein the signal conditioning member comprises a protruding structure, and the protruding structure is symmetrically disposed between the two second transmission channels with the first transmission channel as a central axis, so that signal sizes of the transmission signals are consistent and/or signal sizes of the amplified signals are consistent.
6. The microwave high-frequency power synthesis cavity according to claim 5, wherein the cross section of the protruding structure is triangular, the protruding structure comprises a first side and a second side connected with the second side wall, the first side and the second side are symmetrically arranged with the first transmission channel as a central axis, an included angle between a connection surface formed by the first side and the second side wall is configured to be 130 ° -170 °, a maximum distance between the first side and the second side is 1mm-2mm wider than a width of a through opening of the first transmission channel, and a minimum distance between the protruding structure and the first side wall is set to be 2mm-4mm.
7. The microwave high-frequency power synthesis cavity according to any one of claims 1-6, wherein the length range, width range and thickness of the signal input cavity and the signal output cavity are 10mm-13mm, 1mm-4mm and 7mm, respectively.
8. The microwave high-frequency power synthesis cavity according to claim 1, wherein the amplifying assembly comprises a coupling antenna and a power amplification tube, the coupling antenna and the power amplification tube are electrically connected, the power amplification tube is powered by a power supply circuit, a receiving end of the coupling antenna is used for transmitting the transmission signal to the power amplification tube, the power amplification tube is used for amplifying the transmission signal to generate the amplified signal, and an output end of the coupling antenna is used for radiating the amplified signal to the signal output cavity.
9. The cavity for synthesizing microwave high-frequency power according to claim 1, further comprising a signal absorbing cavity arranged towards the power amplification tube, wherein the inner wall of the signal absorbing cavity is coated with a signal absorbing layer, and the signal absorbing layer can absorb useless signals in a frequency band of 26.5GHz-40 GHz.
10. The microwave high-frequency power synthesis cavity according to claim 1, wherein the cavity comprises a main cavity and an upper cover body matched with the main cavity, the signal input cavity, the signal amplification cavity and the signal output cavity are all arranged on the side wall of the main cavity, and the main cavity is provided with a plurality of weight reducing holes.
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| CN116387789A (en) * | 2023-06-05 | 2023-07-04 | 南京纳特通信电子有限公司 | Broadband high-power multi-path distribution synthesizer |
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