CN219046319U - High-power harmonic filter - Google Patents

Abstract

The utility model discloses a high-power harmonic filter, which comprises: the novel energy-saving device comprises a main body and a cover plate, wherein the main body is made by integral processing, a waveguide cavity is arranged in the main body, waveguide flanges are arranged at two ends of the main body, choke grooves are arranged at the waveguide flanges, coupling holes are formed in two sides of the main body, the coupling holes are distributed on two sides at intervals, the cover plate is arranged on two sides of the main body and is matched with the main body in a buckled mode, and absorption loads are arranged on the cover plate and matched with the coupling holes. The high-power harmonic filter has good harmonic suppression effect, simple and novel structure, compact installation, small process difficulty and convenient processing, and prevents microwave leakage; the insertion loss is small, the port standing wave is good, the reliability is high, and the device is very suitable for being applied to high-power microwave transmitters and can be widely applied to the field of high-power microwaves.

Description

High-power harmonic filter

Technical Field

The utility model relates to the technical field of filters, in particular to a high-power harmonic filter.

Background

Along with the acceleration of global informatization, a great amount of information needs to be transmitted in real time through radio frequency and microwave communication equipment, and in order to achieve the purposes of higher information transmission speed, wider transmission bandwidth and stronger anti-interference capability, a filter plays an extremely important role in a microwave communication system.

The high-power klystron transmitter generates a large amount of unnecessary harmonic power besides the required main frequency power, the intensity of the high-power klystron transmitter can reach more than-20 dB of the main frequency power, and in addition, the sensitivity of a system receiver can reach-110 dBm. In order to prevent interference of power amplifier harmonics to other electronic devices, a high-power harmonic filter is usually inserted into a transmission feeder system of the power amplifier. Particularly in the fields of high-power microwave application such as deep space measurement and control, the filter has outstanding effect and great difficulty in design, processing and development.

In the prior art, a large-frequency filter is usually manufactured by firstly processing two half cavities and then splicing the half cavities to form a waveguide cavity, and splicing gaps are difficult to avoid, so that the problem of microwave leakage exists.

Disclosure of Invention

The utility model aims to provide a high-power harmonic filter and solve the problem of microwave leakage of a high-frequency filter.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a high power harmonic filter comprising: a main body and a cover plate.

The main body is integrally processed, a waveguide cavity is arranged in the main body, waveguide flanges are arranged at two ends of the main body in the waveguide cavity, choke grooves are arranged at the waveguide flanges, coupling holes are formed in two sides of the main body, and the coupling holes are distributed on the two sides at intervals;

the cover plate is arranged on two sides of the main body and is matched with the main body in a buckling way, an absorption load is arranged on the cover plate, and the absorption load is matched with the coupling hole.

In some embodiments, the choke groove is a ring groove, the choke groove being coaxially distributed with the waveguide flange.

In some embodiments, there are two of the choke grooves, and the two choke grooves are coaxially distributed.

In some embodiments, a water cooling plate is further provided, the water cooling plate comprises a main cooling plate and an auxiliary cooling plate, the main cooling plate covers the cover plate respectively, the auxiliary cooling plate covers the main body, the main cooling plate and the auxiliary cooling plate form a rectangular cavity, and inner walls of the rectangular cavity are respectively attached to the main body and the cover plate.

In some embodiments, the primary cold plate and the secondary cold plate are both liquid cooled cold plates.

In some embodiments, a gasket is disposed between the body and the cover plate.

The body is aluminum and has high electrical conductivity and high thermal conductivity.

The utility model has the beneficial effects that:

according to the high-power harmonic filter, the filter main body is integrally machined, so that the generation of a split gap is avoided, and meanwhile, the choke groove is arranged at the waveguide flange, so that microwave leakage can be prevented.

The main body adopts a wall-leakage type structure, coupling holes are formed in two sides of the main body, an absorption load is matched with the coupling holes through a cover plate, the coupling holes form a height-reducing waveguide, the coupling holes are approximately closed for main frequency electromagnetic waves, the height-reducing waveguide is a cut-off waveguide, and basically no coupling power exists; for harmonic electromagnetic waves, the coupling hole is a transmission hole, harmonic power enters the heightening waveguide and is transmitted to an absorption load to be absorbed, so that the coupling hole can sufficiently attenuate the harmonic waves entering the main waveguide without affecting the normal transmission of the main frequency electromagnetic waves.

The surface of the waveguide cavity is treated in a gold plating coating mode, so that good transmission performance of radio frequency microwave signals is guaranteed, and meanwhile, the influence of PIM noise is eliminated.

The main cold plate and the auxiliary cold plate are arranged, so that the heat dissipation problem of the heat flux concentration of the filter is effectively solved, and the filter is ensured to work in a good environment.

Drawings

FIG. 1 is a schematic diagram of a high power harmonic filter according to an embodiment of the present utility model;

FIG. 2 is a top view of a body of an embodiment of the present utility model;

fig. 3 is a schematic diagram of a cover plate according to an embodiment of the utility model.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The high-power harmonic filter of the embodiment of the utility model comprises: body 1, cover plate 2

Specifically, as shown in fig. 1, the main body 1 is made of aluminum material with conductivity and high heat conduction capability by integral processing, a waveguide cavity is arranged in the main body 1, gold plating is coated on the surface of the waveguide cavity, square openings are formed in two ends of the main body 1, and circular waveguide flanges 3 are arranged at the square openings. The waveguide flange 3 is provided with two choke grooves 4, as shown in fig. 1, the two choke grooves 4 are ring grooves and are coaxially distributed with the waveguide flange 3, wherein the depth of the choke groove 4 on the inner side is larger than that of the choke groove 4 on the outer side. Coupling holes 5 are respectively formed in two sides of the main body 1, the coupling holes 5 are distributed on two sides of the main body 1 in an array mode, and the coupling holes are square holes. As particularly shown in fig. 2.

As shown in fig. 3, the cover plate 2 is provided with absorption loads 6, the absorption loads 6 are adhered to the cover plate 2 through high temperature resistant glue, and the absorption loads 6 are in one-to-one correspondence with the coupling holes 5. The main part 1 both sides are equipped with the cooperation groove, and the apron is established in the cooperation groove, and with main part 1 lock cooperation, absorb load 6 and coupling hole 5 cooperation together. A gasket is provided between the cover plate 2 and the main body 1 to achieve sealing.

As shown in fig. 1, a main cooling plate 7 and an auxiliary cooling plate 8 are further provided, the main cooling plate 7 and the auxiliary cooling plate 8 are both liquid cooling plates, the number of the main cooling plates 7 is two, the number of the auxiliary cooling plates 8 is two, the main cooling plate 7 is covered on the cover plate 2, the auxiliary cooling plate 8 is covered on the main body 1, and a rectangular cavity is formed between the main cooling plate 7 and the auxiliary cooling plate 8.

According to the high-power harmonic filter provided by the embodiment of the utility model, the two sides of the main body 1 are provided with the coupling holes 5 to form a wall-leakage type structure, each coupling hole 5 is an independent height-reducing waveguide, the coupling holes 5 are approximately closed for main frequency electromagnetic waves, and the height-reducing waveguides are cut-off waveguides and have no coupling power basically; for harmonic electromagnetic waves, the coupling hole 5 is a transmission hole, harmonic power enters the heightening waveguide and is transmitted to the absorption load 6 to be absorbed, so that the attenuation of the harmonic wave entering the main waveguide is large enough, the normal transmission of the main frequency electromagnetic waves is not influenced, and the aim of inhibiting the harmonic wave is fulfilled. The main body 1 is integrally machined, so that a splicing gap does not exist in the waveguide cavity, and the choke groove 4 is arranged on the waveguide flange 3 to prevent microwave leakage. The main cooling plate 7 and the auxiliary cooling plate 8 are arranged, so that the problem of heat dissipation of the filter due to concentrated heat flux is effectively solved, and the filter is ensured to work in a good environment.

According to the high-power harmonic filter provided by the embodiment of the utility model, the harmonic suppression effect is good, the microwave leakage is prevented, the structure is simple and novel, the installation is compact, the process difficulty is small, and the processing is convenient; the insertion loss is small, the port standing wave is good, the reliability is high, and the device is very suitable for being applied to high-power microwave transmitters and can be widely applied to the field of high-power microwaves.

The present embodiment is not limited in any way by the shape, material, structure, etc. of the present utility model, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model are all included in the scope of protection of the technical solution of the present utility model.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the protection of the present utility model.

If the terms "first," "second," etc. are used herein to define a part, those skilled in the art will recognize that: the use of "first" and "second" is for convenience only as well as for simplicity of description, and nothing more than a particular meaning of the terms is intended to be used unless otherwise stated.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (8)

1. A high power harmonic filter comprising:

the main body is integrally processed and manufactured, a waveguide cavity is arranged in the main body, waveguide flanges are arranged at two ends of the main body in the waveguide cavity, choke grooves are arranged at the waveguide flanges, coupling holes are formed in two sides of the main body, and the coupling holes are distributed on the two sides at intervals;

the cover plate is arranged on two sides of the main body and is in buckling fit with the main body, an absorption load is arranged on the cover plate, and the absorption load is matched with the coupling hole.

2. The high power harmonic filter of claim 1 wherein the choke groove is a ring groove, the choke groove being coaxially distributed with the waveguide flange.

3. The high power harmonic filter of claim 2 wherein there are two of said choke grooves, the two choke grooves being coaxially distributed.

4. The high-power harmonic filter of claim 1, further comprising a water cooling plate comprising a main cold plate and an auxiliary cold plate, the main cold plate covering the cover plate, the auxiliary cold plate covering the main body, the main cold plate and the auxiliary cold plate forming a rectangular cavity, the inner wall of the rectangular cavity being bonded to the main body and the cover plate, respectively.

5. The high power harmonic filter of claim 4 wherein the primary cold plate and the secondary cold plate are both liquid cooled cold plates.

6. The high power harmonic filter of claim 1 wherein the waveguide cavity inner wall is coated with gold plating.

7. The high power harmonic filter of claim 1 wherein a gasket is disposed between the body and the cover plate.

8. The high power harmonic filter of claim 1 wherein the body is aluminum and has high electrical conductivity and high thermal conductivity.

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