CN108134172B

CN108134172B - Power synthesis distribution device

Info

Publication number: CN108134172B
Application number: CN201711309394.9A
Authority: CN
Inventors: 姚顺奇; 刘毅; 刘江涛; 刘兴现; 谢路平; 朱海溶
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2017-12-11
Filing date: 2017-12-11
Publication date: 2020-04-14
Anticipated expiration: 2037-12-11
Also published as: CN108134172A; WO2019114520A1

Abstract

The embodiment of the application relates to the field of communication, in particular to a power synthesis and distribution device, which is used for improving the power capacity of the power synthesis and distribution device. In the embodiment of the application, the method comprises the following steps: the cavity formed by sealing the first cavity shell and the second cavity shell, and the central conductor and the N branch conductors which are positioned in the cavity; n is a positive integer greater than 1; the first cavity shell is provided with a first port and N second ports, and the first port is used for outputting a synthesized signal or inputting a signal to be decomposed; each second port of the N second ports is used for inputting a signal to be synthesized or outputting a decomposed signal; the central conductor comprises a first joint and a first base, the first joint is positioned in the first port, and the first base is fixed on the inner wall of the second cavity shell; the head of the branch conductor is positioned in the second port, and the bottom of the branch conductor is fixed on the side wall of the first base.

Description

Power synthesis distribution device

Technical Field

The embodiment of the application relates to the field of communication, in particular to a power synthesis and distribution device.

Background

In radar and communication systems, power amplifiers are applied more and more widely, but are limited by processes, technologies and the like, the single-tube output power of the power amplifier is limited, and the defects of the power amplifier are more obvious particularly in high-frequency-band power application. In order to meet the output requirement of high-frequency high-power signals, a power synthesis and distribution device must be used.

The traditional binary power synthesis distributor, such as Wilkinson power divider and branch line coupler, is only applied to low-power synthesis, and the synthesis is step-by-step, so that the synthesis efficiency is low, and the requirements of high power and large capacity of a power amplifier in radar and communication systems cannot be met. The waveguide T-junction power combiner meeting the high-power application also needs to be combined step by step, has low combining efficiency and larger size, and cannot meet the requirement of system miniaturization.

In summary, there is a need for a power combining and distributing device to solve the problem of how to improve the power capacity and combining efficiency of the power amplifying and combining device.

Disclosure of Invention

The embodiment of the application provides a power synthesis and distribution device, which is used for improving the power capacity and the synthesis efficiency of the power synthesis and distribution device.

The embodiment of the present application provides a power synthesis distribution apparatus, including:

the cavity formed by sealing the first cavity shell and the second cavity shell, and the central conductor and the N branch conductors which are positioned in the cavity; n is a positive integer greater than 1;

the first cavity shell is provided with a first port and N second ports, and the first port is used for outputting a synthesized signal or inputting a signal to be decomposed; each second port of the N second ports is used for inputting a signal to be synthesized or outputting a decomposed signal;

the central conductor comprises a first joint and a first base, the first joint is positioned in the first port, and the first base is fixed on the inner wall of the second cavity shell;

the head of the branch conductor is positioned in the second port, and the bottom of the branch conductor is fixed on the side wall of the first base.

In one possible implementation, the first chamber shell is a hollow barrel-shaped structure;

the second cavity shell is sealed as a bottom plate at one end of the hollow barrel-shaped structure; the first port is located at the other end of the hollow barrel-shaped structure;

the N second ports are distributed on the side wall of the hollow barrel-shaped structure and close to the second cavity shell.

In one possible implementation, the N second ports are uniformly distributed on the sidewall of the hollow barrel-shaped structure and close to the second cavity shell;

the area of each second port of the N second ports on the side wall of the first cavity shell is a section plane, and each section plane is parallel to the plane where the corresponding second port of the section plane is located and perpendicular to the axial direction of the branch conductor in the corresponding second port of the section plane.

In a possible implementation manner, the shape of the first cavity shell is the same as the overall shape of the first truncated cylinder, the first cylinder and the first circular truncated cone which are arranged in a stacked manner; the N second ports are uniformly distributed on the side wall of the first truncated cylinder; each section of the N sections of the first truncated cylinder is a contact surface between each second port of the N second ports and the first truncated cylinder; the first truncated cylinder is connected with the second cavity shell; the diameter of the first truncated cylinder is greater than the diameter of the first cylinder; the top end of the first round platform is connected with the first port.

According to a possible implementation manner, the first base is provided with N cutting surfaces, each cutting surface is used for fixing the bottom of the corresponding branch conductor, and each cutting surface is perpendicular to the axial direction of the corresponding branch conductor of the cutting surface and parallel to the plane where the second port corresponding to the cutting surface is located.

One possible implementation manner is that the appearance of the first base is the same as the overall appearance of a second truncated cylinder, a second cylinder, a third cylinder, a fourth cylinder, a second circular table, a fifth cylinder and a sixth cylinder which are arranged in a stacked manner; the second cutting cylinder is provided with N cutting surfaces, and the N cutting surfaces are used for fixing the N branch conductors;

the diameter of the fourth cylinder is equal to that of the bottom of the second circular truncated cone, and the diameter of the fifth cylinder is equal to that of the top of the second circular truncated cone;

the diameter of the second truncated cylinder is greater than the diameter of the second cylinder; the diameter of the second cylinder is larger than that of the third cylinder; the diameter of the third cylinder is larger than that of the fourth cylinder; the diameter of the fourth cylinder is larger than that of the fifth cylinder; the diameter of the fifth cylinder is larger than that of the sixth cylinder; the head of the sixth cylinder is mated with the head of the first contact or the head of the branch conductor.

In one possible implementation, the outer wall of the first chamber shell and/or the second chamber shell is provided with a heat sink.

In one possible implementation, the heat dissipation device is a uniformly distributed fin-shaped or cylindrical metal structure.

In one possible implementation manner, the first cavity housing is engaged with the second cavity housing, and the engaging portion seals the cavity through a conductive adhesive.

In one possible implementation, an insulating ring is disposed between the first connector and the first port or between the head of the branch conductor and the second port.

In the embodiment of the application, a power combining and distributing device is provided, and a coaxial T-junction waveguide cavity is formed by a first cavity shell, a second cavity shell, a central conductor and a branch conductor. The central conductor is positioned in the first cavity shell to form a coaxial structure, the central conductor and the first cavity shell form a coaxial structure, and the central conductor and the first cavity shell form a coaxial structure together with the opening on the edge of the first cavity shell and the branch conductor to form a T-shaped junction structure, so that one-time synthesis can be realized, and the synthesis efficiency is improved. The central conductor and the branch conductors are fixedly contacted with the inner wall of the cavity of the power synthesis distribution device, so that the waveguide device can be well cooled, and the average power capacity of the power synthesis device can be greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of a coaxial power combining and distributing apparatus according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a power combining and distributing apparatus according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a power combining and distributing apparatus according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a power combining and distributing apparatus according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a power combining and distributing apparatus according to an embodiment of the present disclosure;

fig. 6 is a schematic structural cross-sectional view of a power combining and distributing apparatus according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a center conductor according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a power combining and distributing apparatus according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a center conductor according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a power combining and distributing apparatus according to an embodiment of the present application;

fig. 11 is a test result diagram of a power combining and distributing apparatus according to an embodiment of the present application;

fig. 12 is a test result diagram of a power combining and distributing apparatus according to an embodiment of the present application.

Detailed Description

The coaxial power synthesis and distribution device is a synthesis device based on coaxial and T-shaped junctions, can realize one-time synthesis of output power of a plurality of modules, has the characteristics of high synthesis efficiency, good amplitude-phase consistency and small insertion loss, better makes up the defects of other power synthesis technologies, can realize the use of other frequency bands through the size of the adjusting device, has wide application range, works in the frequency bands of microwaves and the like, effectively solves the problem of realizing high power output in a high frequency band, particularly can realize high power synthesis and distribution in a small size, has high synthesis efficiency, and is suitable for high-power synthesis and distribution.

Fig. 1 is a schematic structural diagram of a coaxial power combining and distributing apparatus. The coaxial power combining and distributing device is composed of a cavity 100, a central conductor 101 and 2

branch conductors

102 and 103. The central conductor 101 and the

branch conductors

102 and 103 are connected to the coaxial transmission line and are inside the cavity. The center conductor 101 may be a stepped configuration, depending on impedance matching and bandwidth requirements. The coaxial waveguide power combining and distributing device can be applied to different frequency bands according to the difference of the sizes of the

branch conductors

102 and 103, the central conductor 101 and the cavity.

The input power of the coaxial waveguide power combining and distributing means is fed to the inside of the cavity by

branch conductors

102 and 103, and the combined power is output by a coaxial joint connected to the central conductor 101. The

branch conductors

102 and 103 are identical in shape and size to achieve a symmetrical structure of the device. The sizes of the central conductor 101 and the cavity 100 can be adjusted according to the frequency band relationship, so that the method can be applied to different frequency band ranges. The impedance transformation portion of the center conductor has at least one order of impedance variation, and the order can be increased or decreased according to the required bandwidth.

Since the inner central conductor 101 of the coaxial power combining and distributing device is suspended, heat generation usually stays in the air in the cavity and is very difficult to be conducted to the environment, so that the average power capacity of the coaxial power combining and distributing device is greatly limited.

The embodiment of the application provides a power synthesis distribution device to improve the average power capacity and the synthesis efficiency of a power amplification synthesis device.

For convenience of description, the embodiment of the present application is described by taking a 4-way power combining and distributing device as an example. For other multi-path power combining and distributing devices, reference may be made to this embodiment, which is not described herein again.

As shown in fig. 2, a schematic structural diagram of a power combining and distributing apparatus is shown, the apparatus includes:

the first cavity shell 201 and the second cavity shell 202 are sealed to form a cavity, and the central conductor 101 and the

N branch conductors

102 and 105 are positioned in the cavity; in this embodiment, N is 4.

The first cavity shell 201 is provided with a first port 211 and 4

second ports

212 and 215, wherein the first port 211 is used for outputting a synthesized signal or inputting a signal to be decomposed; each of the 4 second ports is used for inputting a signal to be synthesized or outputting a decomposed signal.

The center conductor 101 includes a first connector 221 and a first base 231, the first connector 221 is located in the first port 211, and the first base 231 is fixed on the inner wall of the second cavity housing 202.

And a branch conductor 102, wherein the head of the branch conductor 102 is positioned in the second port 212, and the bottom of the branch conductor 102 is fixed on the side wall of the central conductor 101.

And a branch conductor 103, wherein the head of the branch conductor 103 is positioned in the second port 213, and the bottom of the branch conductor 103 is fixed on the side wall of the central conductor 101.

A branch conductor 104, a head portion of the branch conductor 104 being located in the second port 214, and a bottom portion 234 of the branch conductor 104 being fixed to a sidewall of the center conductor 101.

Branch conductor 105, the head of branch conductor 105 being located in said second port 215, the bottom 225 of branch conductor 105 being fixed to the side wall of central conductor 101.

The power combining and distributing device can also be used as a power distributing device. When used as a synthesis device, the four

second ports

212 and 215 are used as input ends to feed energy into the device from the

branch conductors

102 and 105, are superposed at the central conductor 101, and are output from the first port 211 as an output port. As a power distribution device, the opposite is made to the above. The first port 211 is used as an input end, energy is fed into the device through the central conductor 101, and is decomposed at the four

second ports

212 and 215, and is output through the

second ports

212 and 215 as output ports.

In the implementation process, the distance between the branch conductor and the second cavity housing can be about a quarter wavelength, so that the transmission of the radio frequency signal is not affected although the central conductor base is connected. And the power synthesis and distribution device can be applied to different frequency bands by changing the sizes of the first cavity shell 201, the second cavity shell 202, the central conductor 101 and the

branch conductors

102 and 105. The corresponding structure size can be adjusted according to the frequency band relation, so that the method is applied to different frequency band ranges.

In one possible implementation, the first chamber shell 201 may be a hollow barrel-shaped structure as shown in fig. 2; the second chamber shell 202 is sealed as a bottom plate at one end of a hollow barrel-shaped structure; the first port 211 is located at the other end of the hollow barrel structure; the 4

second ports

212 and 215 are distributed on the sidewall of the hollow barrel structure near the second chamber shell 202. Optionally, the distance between the 4

second ports

212 and 215 and the second cavity shell is about a quarter wavelength.

The number of the second ports of the embodiment of the application can be adjusted according to practical application, so as to meet the power synthesis with higher power level.

In one possible implementation, as shown in fig. 3, the 4

second ports

212 and 215 are uniformly distributed on the sidewall of the hollow barrel-shaped structure and near the second cavity housing 202; the area of each of the 4

second ports

212 and 215 on the sidewall of the first chamber shell 201 is a section plane, and each section plane is parallel to the plane of the corresponding second port of the section plane and perpendicular to the axial direction of the branch conductor in the corresponding second port of the section plane. For example, section 301 corresponds to second port 212 and section 304 corresponds to port 215.

Therefore, the power combining and distributing device is in an axisymmetric structure, so that equal power distribution of branch conductors is guaranteed, and the amplitude and the phase of signals in the power combining and distributing device can be kept well consistent.

In one possible implementation manner, as shown in fig. 4, the outer shape of the first cavity shell 201 is the same as the overall outer shape of the first truncated cylinder 401, the first cylinder 402 and the first circular truncated cone 403 which are stacked; the side wall of the first cut cylinder 401 is uniformly distributed with 4 second ports 212-215; each of the 4 cross-sections of the first truncated cylinder 401 is a contact surface of each of the 4 second ports with the first truncated cylinder 401; the first truncated cylinder 401 is connected to the second housing 202; the diameter of the first truncated cylinder 401 is greater than the diameter of the first cylinder 402; the top end of the first round table 403 is connected with the first port 211.

The grounding shell of the connector 411-415 is provided with flanges and fixed on the first port 211 and the second port 212-215 by screws, and the connector 411-415 is used for connecting the first joint 221 or the head of the branch conductor 102-105. The connectors 411-415 may be mounted to the corresponding first port 211 or second port 212-215 of the first chamber housing 201 or second chamber housing 202 by screws.

An insulating

ring

421 and 425 is disposed between the first connector 211 or the head of the

branch conductors

102 and 103 and the

connector

411 and 415. The first terminal 221 or the head of the

branch conductor

102 and 105 is disposed at the center of the insulating

ring

421 and 425, and the

connector

411 and 415 is disposed at the periphery of the insulating

ring

421 and 425. Optionally, the insulating ring 421-425 may be made of teflon, so as to form a characteristic impedance of 50 Ω.

Referring to fig. 2 and fig. 5, which are schematic structural diagrams of a power combining and distributing apparatus, a first cavity housing 201 and a second cavity housing 202 are fixed by screws 501. The first cavity shell 201 and the second cavity shell 202 are clamped, specifically, a recessed portion 502 of the first cavity shell 201 is arranged at a joint of the first cavity shell 201 and the second cavity shell 202, and a cavity formed by the first cavity shell 201 and the second cavity shell 202 is sealed at the recessed portion 502 through conductive adhesive, so that a good conductive sealing cavity is formed. After the fixing by the screw 501, the conductive adhesive of the concave part 502 is compressed by the force, so as to form a good conductive connection, and ensure the continuity of the current on the inner wall of the cavity, thereby ensuring the performance of the power synthesis and distribution device and preventing the leakage of signals. For example, 3023 nickel carbon conductive paste may be used as the conductive paste.

One possible implementation manner is that all the surfaces of the inner wall surface of the cavity, the central conductor and the branch conductors of the power synthesis distribution device are plated with silver, and the thickness of the silver plating is larger than the skin depth of the working frequency band, so that the performance of the power synthesis distribution device is improved, and the insertion loss is reduced.

Referring to fig. 2, as shown in fig. 6, a cross-sectional view of a structure of a power combining and distributing device is illustrated, where the structure of the power combining and distributing device is a symmetrical structure. The 4 branch conductors have completely consistent structures and sizes, are uniformly distributed on the side wall of the central conductor of a concentric circle taking the axis of the central conductor 101 as the center of the circle, and are inserted into the 4 second ports. For example, branch conductor 102 is inserted into second port 212, branch conductor 104 is inserted into second port 214, and center conductor 101 is located at the center of second cavity housing 202 and inserted into first port 211.

In a possible implementation, the center conductor 101 may be fixed on the inner wall of the second cavity housing 202 by a screw 601; the 4 branch conductors are fixed on the side wall of the first base 231, and the fixed positions are processed with threads, so that the stability and reliability of installation can be ensured.

Due to the good thermal conductivity of the metal conductor with respect to air, the heat generated by the power combining and distributing device in application can be directly conducted to the second cavity shell 202 through the central conductor 101, and then the heat is conducted to the first cavity shell 201, so that the heat can be rapidly exchanged to the external environment of the power combining and distributing device. The central conductor and the bottom of the cavity are directly fixed by screws, and heat generated by combining loss can be timely conducted to the external heat dissipation teeth of the cavity shell, so that the heat dissipation is performed in the surrounding environment.

In a possible implementation manner, the first base 231 is provided with 4 cutting planes, each cutting plane is used for fixing a corresponding branch conductor, and each cutting plane is perpendicular to the axial direction of the branch conductor corresponding to the cutting plane and is parallel to the plane where the second port corresponding to the cutting plane is located.

The section processing is performed on the mounting surface of the

branch conductor

102 and 105 corresponding to the first base 231 of the central conductor, so that the accurate positioning of the processing can be ensured, and the error possibly existing in the processing can be reduced. In addition, the section plane can ensure that the branch conductor is tightly attached after being installed on the central conductor, and is beneficial to the heat generated by the branch conductor to be conducted to the central conductor.

Through good heat dissipation, the power synthesis and distribution device provided in the embodiment of the present application greatly improves the average power capacity of the coaxial waveguide power synthesis and distribution device in the prior art.

The physical dimensions differ significantly between the characteristic impedance of the coaxial structure formed by the center conductor and the first cavity shell and the characteristic impedance of the connector. Therefore, in the embodiment of the present application, the top end of the central conductor 101 adopts a tapered structure, which prevents sudden change caused by an excessively large physical size, improves the continuity of radio frequency signal transmission, reduces energy reflection caused by discontinuity, and improves the radio frequency performance of the radio frequency signal transmission.

The first pedestal 231 of the central conductor 101 adopts a multi-stage impedance transformation structure, and can realize a relative bandwidth of not less than 20%. When the number of the branch conductors is not 4, the relative bandwidth changes accordingly. The central conductor 101 has at least one order of impedance variation, and the order may be increased or decreased depending on the required bandwidth.

In a specific implementation process, the tapered structure may be as shown in fig. 7, and fig. 7 is a schematic structural diagram of a central conductor.

In a possible implementation manner, the shape of the first base 231 is the same as the overall shape of the second truncated cylinder 701, the second cylinder 702, the third cylinder 703, the fourth cylinder 704, the second truncated cone 705, the fifth cylinder 706 and the sixth cylinder 707 which are stacked;

the diameter of the fourth cylinder 704 is equal to the diameter of the bottom of the second circular truncated cone 705, and the diameter of the fifth cylinder 706 is equal to the diameter of the top of the second circular truncated cone 705;

the diameter of the second truncated cylinder 701 is greater than the diameter of the second cylinder 702; the diameter of the second cylinder 702 is greater than the diameter of the third cylinder 703; the diameter of the third cylinder 703 is larger than the diameter of the fourth cylinder 704; the diameter of the fourth cylinder 704 is greater than the diameter of the fifth cylinder 706; the diameter of the fifth cylinder 706 is larger than the diameter of the sixth cylinder 707; the head of the sixth cylinder 707 mates with the head of the first joint 221.

The second truncated cylinder 701 is provided with 4 truncated faces for fixing 4 branch conductors. As shown in fig. 8, cut 801 corresponds to branch conductor 102, and cut 802 corresponds to branch conductor 105.

In order to avoid the breakdown phenomenon caused by the point discharge, the surface roughness of the branch conductors and the central conductor on the surface and inside of the device needs to be controlled, and the edges of the central conductor and the branch conductors need to be chamfered.

In one possible implementation, the tip portions of the central conductor or the branch conductors are chamfered or rounded at 45 ° to reduce the risk of excessive concentration of the tip field strength and the risk of sparking due to air breakdown, and to improve the peak power capacity of the power combining and distributing device.

For the head part of the first joint or the branch conductor connected with the radio frequency coaxial connector, the first joint and the 4 branch conductors of the central conductor can be integrally processed, and the required material is the same material as the radio frequency coaxial connector, namely beryllium copper or phosphor bronze material, so that the reliability and the service life of the connector are improved. Due to the limitation of factors such as processing technology, cost, raw materials and the like, the central conductor is not suitable for being processed by beryllium copper or phosphor bronze integrally. In addition, beryllium copper or phosphor bronze has a high density, and the processed device is heavy, and if the center conductor is integrally processed, the center conductor is too heavy, which is not favorable for the light weight of the device. Therefore, in the embodiment of the present application, the first joint of the central conductor and the first base may be made of different materials.

In one possible implementation, the first joint 221 of the center conductor 101 is made of beryllium copper or phosphor bronze, and the first base 231 is made of brass. The first joint 221 and the first seat 231 weld the two parts together by metal welding. Specifically, as shown in fig. 7, the head of the sixth cylinder 707 and the head of the first joint 221 are welded together by metal welding. The metal weld may be silver or tin.

When the power synthesis distribution device works in a high frequency band, the first joint and the first base of the central conductor and the head parts of the branch conductors and the bottom parts of the branch conductors are more suitable for adopting a welding connection mode. Because the frequency of the device is higher, the required device size is small, the required processing technology is higher, and the welding is easier to ensure the performance.

One possible implementation, as shown in fig. 9, is a schematic structural diagram of a central conductor 101. The first contact 221 of the center conductor 101 is made of beryllium copper or phosphor bronze, and the first base 231 is made of brass or aluminum alloy. The first joint 221 and the first seat 231 are fastened together by screws 901.

When the power synthesis distribution device works in a lower frequency band, the first joint and the first base of the central conductor and the head of the branch conductor and the bottom of the branch conductor can adopt a screw connection mode. Because the frequency of the device is lower, the required size of the device is larger, and the connection mode of fixing the screw can reduce the processing cost on the premise of ensuring the performance of the device.

Optionally, the first joint of the central conductor or the heads of the 4 branch conductors may use the same rf coaxial connector, so as to reduce the manufacturing cost. Specifically, the first joint and the head of the branch conductor may adopt standard SMA, N or 7/16 radio frequency coaxial connectors, and radio frequency coaxial connectors of different standards are selected according to application occasions, so as to achieve better universality.

Fig. 10 is a schematic structural diagram of a power combining and distributing apparatus. Since the central conductor in the power combining and distributing device generates heat most seriously, the embodiment of fig. 10 is to provide the heat dissipating device 1001 on the outer wall of the second cavity housing 202, and in this embodiment, the heat dissipating device 1001 may be a fin-shaped metal structure uniformly distributed on the outer wall of the second cavity housing 202. So as to improve the heat dissipation performance and further improve the average power capacity.

Alternatively, the heat dissipation device may be cylindrical or have other structures that facilitate increasing the heat dissipation area.

Optionally, a heat dissipation device may also be disposed on the outer wall of the first cavity shell 201, and the heat dissipation device may be a fin-shaped metal structure uniformly distributed on the outer wall of the first cavity shell 201, so as to improve heat dissipation performance and further improve average power capacity thereof.

Because the central conductor and the branch conductors of the power combining and distributing device are fixed to the inner wall of the first cavity shell 201 or the second cavity shell 202, heat generated by combining loss can be timely conducted to the heat dissipation teeth on the outer wall of the first cavity shell 201 or the second cavity shell 202, and therefore the heat can be quickly conducted to the external environment.

Fig. 11 is a test result diagram of a power combining and distributing apparatus provided in the embodiment of the present application. The actual test is carried out on three frequency points of 2.4GHz, 2.45GHz and 2.5GHz, and the return loss of the output port of the power synthesis and distribution device is lower than-20 dB, so that the relative bandwidth of about 22 percent is met, and the amplitude consistency is good.

Fig. 12 is a test result diagram of a power combining and distributing apparatus according to an embodiment of the present application. The three frequency points of 2.4GHz, 2.45GHz and 2.5GHz are actually tested, and the power synthesis and distribution device has good phase consistency.

At present, a semiconductor power amplifier is limited by processes, technologies and the like, and the output power of a single tube is low, especially in a high-frequency band. Power combiners are important components for high power applications. The existing power synthesizer has the defects of small power capacity, large insertion loss, low synthesis efficiency and the like. The common power synthesis adopts a step-by-step synthesis mode, and the synthesis efficiency is low.

In the embodiment of the application, a coaxial structure is adopted, and high-power one-time synthesis is realized. Since the plurality of input ports perform power combining at one time, the combining efficiency is high. The method has better phase and amplitude consistency and lower insertion loss, thereby being suitable for high-power synthesis application. The radio frequency input and output end conductors are connected with the synthesizer cavity shell, so that the transmission of radio frequency signals is met while good heat dissipation is ensured, high-power synthesis is realized, and the high efficiency of signal synthesis is met. The power synthesis and distribution device provided by the embodiment of the application can be widely applied to various high-power systems, such as radars and communication systems. The power synthesis distribution device provided by the embodiment of the application has the advantages of symmetrical structure, few components, simple assembly, easy realization and stable and reliable performance.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A power combining and distributing apparatus, comprising:

the central conductor comprises a first joint and a first base, the first joint is positioned in the first port, and the first base is fixed on the inner wall of the second cavity shell; the top end of the central conductor adopts a tapered structure; specifically, the appearance of the first base is the same as the overall appearance of a second truncated cylinder, a second cylinder, a third cylinder, a fourth cylinder, a second circular table, a fifth cylinder and a sixth cylinder which are arranged in a stacked manner; the second cutting cylinder is provided with N cutting surfaces, and the N cutting surfaces are used for fixing the N branch conductors; the diameter of the fourth cylinder is equal to that of the bottom of the second circular truncated cone, and the diameter of the fifth cylinder is equal to that of the top of the second circular truncated cone; the diameter of the second cylinder is larger than that of the third cylinder; the diameter of the third cylinder is larger than that of the fourth cylinder; the diameter of the fourth cylinder is larger than that of the fifth cylinder; the diameter of the fifth cylinder is larger than that of the sixth cylinder; the head of the sixth cylinder is matched with the head of the first joint or the head of the branch conductor; the diameter of the second truncated cylinder is greater than the diameter of the second cylinder;

the head of the branch conductor is positioned in the second port, and the bottom of the branch conductor is fixed on the side wall of the second truncated cylinder.

2. The power combining and splitting apparatus of claim 1, wherein the first chamber housing is a hollow barrel structure;

the second cavity shell is a bottom plate for sealing one end of the hollow barrel-shaped structure; the first port is located at the other end of the hollow barrel-shaped structure;

the N second ports are distributed on the side wall of the first cavity shell and close to the second cavity shell.

3. The power combining and splitting apparatus of claim 2, wherein the N second ports are evenly distributed on the sidewall of the first housing and near the second housing;

4. The power combining and splitting apparatus of claim 3, wherein the first cavity housing has an outer shape that is the same as an overall outer shape of the first truncated cylinder, the first cylinder, and the first truncated cone that are stacked; the N second ports are uniformly distributed on the side wall of the first truncated cylinder; each section of the N sections of the first truncated cylinder is a contact surface between each second port of the N second ports and the first truncated cylinder; the first truncated cylinder is connected with the second cavity shell; the diameter of the first truncated cylinder is greater than the diameter of the first cylinder; the top end of the first round platform is connected with the first port.

5. The power combining and splitting device according to claim 4, wherein the second truncated cylinder is provided with N truncated faces, each of which is used for fixing the bottom of the corresponding branch conductor, and each of which is perpendicular to the axial direction of the branch conductor corresponding to the truncated face and parallel to the plane of the second port corresponding to the truncated face.

6. The power combining splitting device of any one of claims 1-5, wherein an outer wall of the first cavity housing and/or the second cavity housing is provided with a heat sink.

7. The power combining splitting device of claim 6, wherein the heat dissipating device is a uniformly distributed fin-shaped or cylindrical metal structure.

8. The power combining and distributing device according to claim 6, wherein the first housing is engaged with the second housing, and the engaging portion seals the cavity by a conductive adhesive.

9. The power combining splitting device according to claim 6, wherein an insulating ring is provided between the first connector and the first port or between a head of the branch conductor and the second port.