CN217641737U - Broadband high-power coaxial multi-path radial power combiner - Google Patents
Broadband high-power coaxial multi-path radial power combiner Download PDFInfo
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- CN217641737U CN217641737U CN202221026683.4U CN202221026683U CN217641737U CN 217641737 U CN217641737 U CN 217641737U CN 202221026683 U CN202221026683 U CN 202221026683U CN 217641737 U CN217641737 U CN 217641737U
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Abstract
The utility model discloses a broadband high-power coaxial multipath radial power combiner, which comprises a waveguide synthesis cavity and a waveguide coaxial conversion section which are coaxially arranged; the waveguide synthesis cavity is of a plate structure, a concave cavity is formed in the center of the waveguide synthesis cavity, and a coupling table body is arranged at the position of the concave cavity in a protruding mode; at least three SMA coupling coaxial connectors are uniformly arranged at the outer edge of the waveguide synthesis cavity at intervals; the waveguide coaxial conversion section comprises a hollow cylinder, and a ridge waveguide structure is arranged on the inner wall of the hollow cylinder; the end with smaller opening area of the waveguide coaxial conversion section is a waveguide input port, and the other end is a waveguide output port; a coaxial line is connected and arranged on one side of the ridge waveguide structure close to the waveguide input port; the coaxial line and the waveguide coaxial conversion section are coaxially arranged; the coupling table body is connected with the allocation step through a coaxial line. The problems that a plurality of synthesizers are generally cascaded to form the traditional coaxial synthesizer during multipath synthesis, the loss and the volume are relatively large, and the synthesis effect is poor are solved.
Description
Technical Field
The utility model belongs to the technical field of microwave communication, concretely relates to high-power coaxial multichannel radial power combiner of broadband.
Background
At present, with the development of modern radar, the traditional magnetron and the transmitter of the travelling wave tube type are gradually replaced by the solid-state transmitter with higher space ratio. In the application of ultra-wide band short pulse electromagnetic field, in order to improve the range resolution of the radar, short time domain pulses are needed, so that although the resolution is improved, the contradiction is that the energy is reduced, and the detection range is reduced. In order to improve the detection range of the short pulse system radar, the pulse power of a source can be increased. Under the existing technical conditions, the power of the source is increased to a certain extent, and under the high-power condition, other technical difficulties can occur. Therefore, a plurality of solid-state sources are often selected for power synthesis, and a synthesis key technology power synthesizer is particularly important. Therefore, it is necessary to research a broadband high-power coaxial radial synthesizer.
The main function of the high-power coaxial radial synthesizer is to solve the problem of power synthesis at the front end of an electronic system, and the high-power coaxial radial synthesizer is a key component of a microwave feeder system, and the performance of the high-power coaxial radial synthesizer directly influences the performance realization of the whole system. However, the conventional coaxial synthesizer is limited by simple structure and size, and is generally designed by cascading a plurality of synthesizers, so that the loss and volume are relatively large, the power capacity is limited, and the number of the synthesizers is 2 at most n The synthesizer, especially the synthesizer of any number of paths, because of the difference of the amplitude and phase consistency, the synthetic effect is not good; in the existing coaxial synthesizer scheme, the detectable microstrip line synthesizer and strip line synthesizer have simple structure, easy manufacture and easy connection with the circuit, and have the defects of low voltage resistance and large loss, and are only suitable for being used by a small-power circuit which cannot meet the high-power condition.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a radial power combiner of high-power coaxial multichannel of broadband to solve traditional coaxial combiner and generally cascade with a plurality of synthesizers when the multichannel is synthetic and form, loss and volume are all great relatively, the not good problem of synthetic effect.
The utility model adopts the following technical scheme: a broadband high-power coaxial multi-path radial power combiner comprises a waveguide synthesis cavity and a waveguide coaxial conversion section which are coaxially arranged; the waveguide synthesis cavity is of a plate structure, a concave cavity is formed in the center of the waveguide synthesis cavity, and a coupling table body is arranged at the position of the concave cavity in a protruding mode; at least three SMA coupling coaxial connectors are uniformly arranged at the outer edge of the waveguide synthesis cavity at intervals; the waveguide coaxial conversion section comprises a hollow cylinder, the inner wall of the hollow cylinder is provided with a ridge waveguide structure, and the ridge waveguide structure is formed by a plurality of allocation steps with different heights and lengths; the end with smaller opening area of the waveguide coaxial conversion section is a waveguide input port, and the other end is a waveguide output port; a coaxial line is connected and arranged on one side of the ridge waveguide structure close to the waveguide input port; the coaxial line and the waveguide coaxial conversion section are coaxially arranged; the coupling table body is connected with the allocation step through a coaxial line.
Furthermore, edges and corners of the blending steps are all rounded, and the blending steps are in a wedge or magnetic ring coupling mode.
Furthermore, the coupling stage body is formed by coaxially overlapping stage bodies with different sizes.
Further, the type and size of each SMA coupling coaxial connector are the same.
Further, each SMA coupling coaxial connector is distributed at the same height in parallel at the outer edge of the waveguide synthesis cavity.
Furthermore, the input port of each SMA coupling coaxial connector is provided with a deployment column with the same size, and the deployment columns are used for being coupled with the coupling table body.
Further, the input port of each SMA coupling coaxial connector is a standard SMA-50k interface.
The utility model has the advantages that: signals are input through a plurality of coaxial connectors with the same input port and are coupled with a coupling platform body matching structure in a coaxial radial waveguide, the signals of a plurality of paths and the like are synthesized into a coaxial line converted by the coaxial waveguide at a synthesis end in the same phase, then the signals of the plurality of paths are synthesized into the waveguide of the BJ58 to be output through the conversion from the coaxial to the waveguide, the synthesis of the signals of the plurality of paths is realized by using a first-stage coupling structure, meanwhile, the lower synthesis port standing wave ratio and the higher insertion loss are obtained, the high-power use is greatly met by the good amplitude and phase consistency, and the requirement of an electronic communication system for the high-power synthesis of any path of broadband is met.
Drawings
Fig. 1 is a schematic perspective view of a broadband high-power coaxial multi-path radial power combiner according to the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a broadband high-power coaxial multi-path radial power combiner according to the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a waveguide coaxial switching section of the broadband high-power coaxial multi-path radial power combiner according to the present invention;
fig. 4-1 and fig. 4-2 are respectively schematic structural diagrams of the deployment step of the broadband high-power coaxial multipath radial power combiner of the present invention in the form of a wedge and a magnetic ring coupling.
Wherein, 1, the waveguide coaxial switching section; 2. a waveguide synthesis cavity; 3. an SMA coupling coaxial connector; 4. a coupling stage body; 5. step allocation; 6. preparing a column; 7. a coaxial line.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a high-power coaxial multichannel radial power combiner of broadband, as shown in fig. 1-3, including the coaxial waveguide synthesis chamber 2 and the coaxial changeover portion 1 of waveguide of coaxial setting. As shown in fig. 2, the waveguide synthesis cavity 2 is a coaxial radial waveguide synthesis cavity, and includes a plate structure, a concave cavity is formed in the center of the plate structure, a coupling stage 4 is outwardly protruded from the concave cavity, and the coupling stage 4 is coaxially disposed with the waveguide coaxial conversion section 1. Furthermore, at least three SMA coupling coaxial connectors 3 are arranged at the outer edge of the waveguide synthesis cavity 2 at even intervals. The axis of each SMA coupling coaxial connector 3 is arranged radially along the waveguide synthesis cavity 2.
As shown in fig. 4, the waveguide coaxial conversion section 1 includes a hollow cylinder, a ridge waveguide structure is disposed on the inner wall of the hollow cylinder, and the ridge waveguide structure is formed by a plurality of blending steps 5 with different heights and lengths; the end with smaller opening area of the waveguide coaxial conversion section 1 is a waveguide input port, and the other end is a waveguide output port; a coaxial line 7 is connected and arranged on one side of the ridge waveguide structure close to the waveguide input port; the coaxial line 7 is arranged coaxially with the waveguide coaxial transition section 1. The coupling table body 4 is connected with the allocation step 5 through a coaxial line 7.
In some embodiments, the edges and corners of the adjusting steps 5 are rounded, and the adjusting steps 5 may be arranged in a step form, or in a wedge or magnetic ring coupling form. The waveguide section of the waveguide coaxial conversion section 1 is arranged at the center of the waveguide in the waveguide coaxial conversion section 1, a plurality of allocation steps 5 with different heights and lengths are arranged in the waveguide coaxial conversion section, and a magnetic ring coupling is formed in the waveguide to facilitate the output of signals under high power. As shown in fig. 4-1, the blending step 5 is a tapered blending, that is, the previous blending step is replaced by a tapered blending, and the required electrical index can still be achieved by reasonably optimizing the structural size. As shown in fig. 4-2, the adjusting step 5 is in the form of magnetic ring coupling, which means that the inner conductor is bent to form a coupling ring, and the electrical performance matching is realized through a coupling magnetic field.
In some embodiments, the coupling stage 4 is a coaxial stack of stages of different sizes, and the size of the stage is adjusted to match the impedance of the coaxial line and the waveguide cavity. The coupling table body 4 and the waveguide synthesis cavity 2 are integrated, so that the generation of point discharge under the condition of high power can be prevented. The top end of the coupling stage body 4 is connected with the coaxial line 7 of the input end waveguide coaxial conversion section 1, and the edge angle of each stage body needs to be chamfered R, so that the coupling stage body is used under high power.
In some embodiments, each SMA coupling coaxial connector 3 is the same size and dimension.
In some embodiments, each SMA coupling coaxial connector 3 is distributed parallel to the outer edge of the waveguide synthesis cavity 2 at the same height.
In some embodiments, one end of each SMA coupling coaxial connector 3 is an input end, the other end is a coupling end, a deployment pillar 6 is disposed at the coupling end of each SMA coupling coaxial connector 3, the deployment pillar 6 is not in contact with the coupling stage 4, the deployment pillars 6 are the same in size, and the deployment pillars 6 are used for coupling with the coupling stage 4.
In some embodiments, the input port of each SMA coupling coaxial connector 3 is a standard SMA-50k interface. The waveguide output port adopts a waveguide port of a standard BJ 58.
Examples
A broadband high-power coaxial multi-path radial power combiner comprises a waveguide synthesis cavity 2 and a waveguide coaxial conversion section 1 which are coaxially and radially arranged. The waveguide synthesis cavity 2 is connected with the coaxial line 7 of the waveguide coaxial transition section 1 through the coupling table body 4 in the cavity, the waveguide synthesis cavity 2 is further connected with 10 SMA coupling coaxial connectors 3, and the SMA coupling coaxial connectors 3 are waveguide input ends. The waveguide coaxial conversion section 1 is connected with the waveguide synthesis cavity 2, so that final synthesis from multi-channel coaxial signals to the waveguide is realized.
The waveguide synthesis cavity 2 is a two-in-one synthesizer cascade mode, which is adopted instead of conventional two-in-one to four-in-one synthesis, and adopts a coaxial waveguide radial mode to realize multi-path synthesis, and 10 input port coaxial connectors are sequentially and uniformly distributed on the circumference of the waveguide synthesis cavity 2 at intervals of 36 degrees and are coupled with the coupling stage 4 in the cavity to realize multi-path signal synthesis.
The waveguide coaxial conversion section 1 of the synthesis port is composed of a plurality of allocation steps 5 with different heights and lengths, a ridge waveguide structure is formed on the waveguide, and finally the coaxial line 7 is connected with the waveguide synthesis cavity 2 to output multi-path synthesis signals.
In this example, the test result shows that the broadband high-power coaxial radial synthesizer realizes the synthesis of multi-channel signals at 4.64-7.05GHz (41.2% bandwidth), the final synthesis power is 800W, the high performance index requirements of the system under the condition of high bandwidth are met, particularly low standing wave and smaller transmission loss, the high performance index that the standing wave is less than 1.4, the loss is less than 0.5dB, the amplitude consistency is less than or equal to +/-0.5 dB, and the phase consistency is less than or equal to +/-5 degrees can be realized; and the coaxial multipath radial power combiner adopts a scheme of radial multipath one-level combination, and has the advantages of simple structure, small volume and convenient use.
The utility model relates to a high-power coaxial multichannel radial power combiner's of broadband application method does: signals are input through a plurality of paths of same SMA coupling coaxial connectors 3, then are coupled with a coupling table body 4 in a waveguide synthesis cavity 2, and finally the signals are synthesized into a coaxial line 7 of a waveguide coaxial conversion end 1, so that the final synthesis of the signals from the plurality of paths of coaxial signals to the waveguide is realized.
Through the scheme that adopts radial power synthesizer, with ten way signal one-level synthesis outputs, rather than the cascaded form of ordinary two unifications, adopt the one-level synthesis, shortened the length of feeder greatly, the loss index of the entire system that reduces, because all input ports size is the same to the equipartition is with on the waveguide synthesis chamber 2, so ware range and phase place uniformity are better, and coupling stage body 4 has adopted the design of ground connection simultaneously, the ignition of avoiding, the power capacity of improvement. The requirements of an electronic communication system on a high-performance high-power synthesizer are met.
Signals are input through a coaxial connector with the same input ports and are coupled with a coupling platform body matching structure in a coaxial radial waveguide, the multi-path signals and other pairs are synthesized into a coaxial line converted by the coaxial waveguide at a synthesis end in the same phase, then the multi-path signals are synthesized into a waveguide of the BJ58 to be output through the conversion from the coaxial to the waveguide, the synthesis of the multi-path signals is realized by using a first-stage coupling structure, a lower synthesis port standing wave ratio and higher insertion loss are obtained at the same time, the high-power use is greatly met due to good amplitude and phase consistency, and the requirement of an electronic communication system on high-power synthesis of any number of broadband is met.
The final realized electric index is taken as a target, the size of a coupling stage body matching structure in the coaxial radial waveguide is reasonably optimized to generate a cylindrical surface TEM mode, an electric field of the mode only has a Z-direction component, the electric field is the same on the circumference with the radius of R, a magnetic field only has a phi-direction component, the magnitude of the magnetic field is equal on the circumference with the radius of R, and the direction is tangential along the circumference.
The symmetric SMA coupling coaxial connector 3 array has the electromagnetic field distribution that keeps axial symmetry although the electromagnetic field in the radial waveguide is greatly changed. The electric field distribution at each SMA coupling coaxial connector 3 is the same, which ensures that the energy coupled from the waveguide by each SMA coupling coaxial connector 3 is equal, thereby realizing equal power distribution and synthesis of the SMA coupling coaxial connector 3 array.
Since the magnetic field of the radial waveguide is symmetrical about the central axis, the energy distributed to the output ports is equal as long as the output ports SMA coupled coaxial connector 3 are ensured to be the same in size, and the amplitude and the phase can be kept better consistent. The structure design and debugging are relatively simple, the sizes of the coaxial connectors (including the deployment columns) with multi-path input are completely the same, and the coaxial connectors can be directly assembled and tested with the radial waveguide cavity after being independently welded.
Claims (7)
1. A broadband high-power coaxial multi-path radial power combiner is characterized by comprising a waveguide combining cavity (2) and a waveguide coaxial conversion section (1), which are coaxially arranged; the waveguide synthesis cavity (2) is of a plate structure, a concave cavity is formed in the center of the waveguide synthesis cavity, and a coupling table body (4) is arranged at the position of the concave cavity in a protruding mode; at least three SMA coupling coaxial connectors (3) are uniformly arranged at the outer edge of the waveguide synthesis cavity (2) at intervals; the waveguide coaxial conversion section (1) comprises a hollow cylinder, the inner wall of the hollow cylinder is provided with a ridge waveguide structure, and the ridge waveguide structure is formed by a plurality of allocation steps (5) with different heights and lengths; the end of the waveguide coaxial conversion section (1) with smaller opening area is a waveguide input port, and the other end is a waveguide output port; a coaxial line (7) is connected and arranged on one side of the ridge waveguide structure close to the waveguide input port; the coaxial line (7) is coaxially arranged with the waveguide coaxial conversion section (1); the coupling table body (4) is connected with the allocation step (5) through the coaxial line (7).
2. The broadband high-power coaxial multi-path radial power combiner according to claim 1, wherein the corners of the adjusting steps (5) are rounded, and the adjusting steps (5) are in a wedge or magnetic ring coupling form.
3. A broadband high-power coaxial multi-path radial power combiner according to claim 1 or 2, wherein the coupling stages (4) are formed by coaxially stacking stages of different sizes.
4. A broadband high power coaxial multi-path radial power combiner according to claim 1 or 2, wherein each of said SMA coupling coaxial connectors (3) is of the same type and size.
5. A broadband high power coaxial multi-path radial power combiner according to claim 1 or 2, wherein each of said SMA coupling coaxial connectors (3) is distributed in parallel at the same height at the outer edge of the waveguide synthesis cavity (2).
6. A broadband high-power coaxial multi-path radial power combiner as claimed in claim 1 or 2, wherein the input port of each SMA coupling coaxial connector (3) is provided with a matching column (6) with the same size, and the matching columns (6) are used for coupling with the coupling stage body (4).
7. A broadband high power coaxial multi-path radial power combiner according to claim 1 or 2, wherein the input port of each SMA coupling coaxial connector (3) is a standard SMA-50k interface.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117060038A (en) * | 2023-08-11 | 2023-11-14 | 安徽阖煦微波技术有限公司 | Novel high-power one-to-twelve combiner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117060038A (en) * | 2023-08-11 | 2023-11-14 | 安徽阖煦微波技术有限公司 | Novel high-power one-to-twelve combiner |
| CN117060038B (en) * | 2023-08-11 | 2024-03-08 | 安徽阖煦微波技术有限公司 | Novel high-power one-to-twelve combiner |
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