Strip-shaped transmission line type strong electromagnetic pulse source

Abstract

The invention provides a strip-shaped transmission line type strong electromagnetic pulse source, which belongs to the field of high-power microwaves, is integrally of a flat plate type structure, and comprises a flat plate type strip-shaped line conductor, a composite magnetic core, a high-voltage insulation pouring sealant and coaxial interfaces arranged at the two ends of the flat plate type strip-shaped line conductor. According to the invention, an axial bias magnetic field is provided for the ferrite in the nonlinear strip-shaped transmission line by designing the permanent magnets which are periodically distributed at intervals with the ferrite, the function of a traditional excitation solenoid coil in the background technology is effectively replaced, the length of the actually used permanent magnets is relatively short, the structure simplification and light miniaturization of the whole system are realized, and the cost is reduced. The broadband high-power microwaves with high center frequency, high repetition frequency and adjustable frequency and oscillation duration of the microwaves can be generated. Therefore, the technical problems that when a traditional permanent magnet is adopted to replace an excitation solenoid coil to provide a uniform axial bias magnetic field, the size is large, the system is complex, and portability is poor are effectively solved.

Description

Technical Field

[0001] The present application relates to the field of high-power microwave technology, and in particular to a fully solid-state, miniaturized, strip-shaped transmission line-type strong electromagnetic pulse source based on periodic distribution of ferrite and permanent magnets. Background Art

[0002] Compared with traditional high power microwave (HPM) vacuum devices, the advantages of broadband strong electromagnetic pulse sources based on gyromagnetic nonlinear transmission lines (GNLTLs) are that they do not require driving electron beams, confining magnetic field systems and vacuum systems, and their structures are relatively simple, and their volumes are usually 1 to 3 orders of magnitude smaller than those of electric vacuum devices. By designing GNLTLs with different structures, it is possible to achieve a frequency range that is difficult to achieve with traditional broadband HPM devices, and at the same time, the center frequency and phase can be adjusted by the initial state of the inductor core, with the ability to operate at a high repetition rate and to synthesize power as a coherent source module.

[0003] Ferrite material is the core component of GNLTLs, and its magnetic permeability changes with the change of magnetic field. The working principle of GNLTLs is based on the LLG gyromagnetic precession equation, relying on the magnetic moment of ferrite material to precess around the effective magnetic field in the transmission line to generate broadband microwave oscillation. The traditional GNLTLs strong electromagnetic pulse source needs to set an excitation solenoid coil to provide an axial bias magnetic field that saturates all ferrite materials in the entire transmission line area. For example, the invention patent with publication number CN107919518A provides a high-repetition-frequency, wide-spectrum, high-power microwave oscillator based on a gyromagnetic strip transmission line, which includes a flat strip line, a ferrite core, a coil, a D-dot test probe and an input and output interface; wherein, multiple groups of block-shaped ferrite cores are tightly attached to the upper and lower sides of the inner conductor of the strip transmission line; a multi-turn DC power supply coil is wound on the outside of the upper and lower conductors of the strip line to provide an axial bias magnetic field for the device; by changing the power supply current of the coil, the oscillation frequency of the high-power microwave can be adjusted online and the pulse front can be steepened. However, the structural setting of the above-mentioned excitation solenoid coil requires continuous energy supply for the axial bias magnetic field during the operation of generating its electromagnetic pulse train, causing heat dissipation problems. In addition, there are technical problems such as large overall system size, complex system and poor portability.

[0004] One idea is to use permanent magnets to replace the excitation solenoid coil to provide an axial bias magnetic field. However, the traditional permanent magnet system can only ensure a uniform axial magnetic field in its middle area, and there will be magnetic field distortion at both ends. If a uniform axial magnetic field of at least 50 cm long is to be generated, the radial size of the traditional permanent magnet system reaches tens of centimeters and the weight is close to hundreds of kilograms. This makes it very difficult for GNLTLs to use traditional permanent magnet systems to provide a uniform axial bias magnetic field. The entire system will become extremely complex and lack the mobility brought by lightweight miniaturization.

[0005] In view of this, it is necessary to study a strip transmission line type strong electromagnetic pulse source based on periodic distribution of ferrite and permanent magnet to solve the above technical problems. Summary of the invention

[0006] In view of the technical problems existing in the background technology, the present application designs a new compact gyromagnetic nonlinear strip transmission line structure, thereby providing a fully solid-state miniaturized strip transmission line type strong electromagnetic pulse source based on the periodic distribution of ferrite and permanent magnets. By designing permanent magnets spaced apart from the periodic distribution of ferrites to provide an axial bias magnetic field for the ferrites in the GNLTLs, the function of the traditional excitation solenoid coil in the background technology is effectively replaced, and the actual length of the permanent magnet used is relatively short, so as to achieve the simplification and lightweight miniaturization of the entire system structure.

[0007] Based on the above technical purpose, the present invention provides a strip transmission line type strong electromagnetic pulse source, which has a flat structure as a whole, including a flat strip line conductor, a composite magnetic core, a high-voltage insulating potting glue and a coaxial interface arranged at both ends;

[0008] The flat strip conductor is a three-conductor structure consisting of an upper / lower conductor and an inner conductor; wherein the two flat upper / lower conductors are both kept at ground potential; the inner conductor located in the middle and having a circular cross-section is at high voltage potential; a composite magnetic core is filled between the upper and lower outer conductors and the inner conductor;

[0009] The composite magnetic core is formed by alternating and periodically arranging permanent magnet cores and ferrite cores and axially cascading them;

[0010] The inevitable gap between the composite magnetic core and the three-conductor structure is filled with high-voltage insulating potting glue.

[0011] As a further improvement of the present invention, the composite magnetic core is a block structure with an axial through hole in the middle; the inner diameter of the axial through hole is set to be the same as the outer diameter of the inner conductor, so that the inner conductor can axially pass through the composite magnetic core.

[0012] As a further improvement of the present invention, the composite magnetic core is formed by a sandwich structure consisting of two adjacent rectangular permanent magnet cores with a rectangular ferrite core sandwiched between them, which are arranged cyclically and tightly combined.

[0013] As a further improvement of the present invention, the strip transmission line type strong electromagnetic pulse source also includes a potting injection nozzle arranged on the upper / lower conductor; the high-voltage insulating potting glue adopts polyoxyester insulating potting glue or silicone rubber.

[0014] As a further improvement of the present invention, the coaxial interface includes a coaxial input interface and a coaxial output interface respectively installed at the input and output ports of the strip transmission line type strong electromagnetic pulse source.

[0015] As a further improvement of the present invention, the strip transmission line type strong electromagnetic pulse source also includes a sealing gasket arranged between the coaxial interface and the upper / lower conductor; the sealing gasket is a rectangular gasket set with the same cross-sectional size as the strip transmission line type strong electromagnetic pulse source, and a gasket through hole with the same outer diameter as the inner conductor is provided in the middle for the inner conductor to pass axially through.

[0016] As a further improvement of the present invention, the flat strip line conductor is made of metal material; the metal material includes but is not limited to one or more combinations of brass, stainless steel, and aluminum alloy.

[0017] As a further improvement of the present invention, the permanent magnet core is made of alloy permanent magnet material or ferrite permanent magnet material; the ferrite core is made of garnet ferrite or spinel ferrite.

[0018] As a further improvement of the present invention, the coaxial interface includes an interface outer conductor and an interface inner conductor respectively connected to the upper / lower conductor and the inner conductor, so as to transition the flat plate structure into a circular coaxial structure; the interface outer conductor includes a rectangular outer conductor and a cylindrical outer conductor vertically arranged at the center of the rectangular outer conductor and axially hollow.

[0019] As a further improvement of the present invention, the two flat upper / lower conductors are fixed by bolts; a through hole is provided at the edge of the upper conductor, and a screw hole matching the bolt is provided at a position of the lower conductor corresponding to the through hole of the upper conductor; the gap distance between the upper / lower conductors is regulated by adjusting the length of the bolt.

[0020] Based on the above technical solution, the working principle of the present application is: first, two adjacent permanent magnet cores arranged at intervals with the periodic distribution of the ferrite core provide a uniform axial bias magnetic field for the ferrite core in the middle, so that the magnetic moment of the ferrite core is aligned along the direction of axial pulse transmission and reaches magnetic saturation. Subsequently, when a fast-front high-voltage pulse is injected into the nonlinear strip transmission line, a large angular magnetic field is generated around the central inner conductor. When the high-voltage pulse passes through the ferrite core area, the angular magnetic field interacts with the axially aligned magnetic moment in the ferrite core, causing the two to produce the Larmor gyromagnetic precession effect at a higher frequency. Then, the high-frequency precession in the ferrite core causes the appearance of broadband RF oscillation pulses on the nonlinear strip transmission line.

[0021] In general, the above technical solutions conceived by this application can achieve the following beneficial effects:

[0022] 1. The strip transmission line type strong electromagnetic pulse source based on the alternating periodic distribution of ferrite and permanent magnet cores has a simple structure, is easy to be lightweight and miniaturized, and can adapt to the application environment of various mobile platforms.

[0023] 2. Since each ferrite core is provided with a uniform axial bias magnetic field by the adjacent permanent magnet cores in front and behind to align and saturate its magnetic moment, no additional external excitation solenoid coil system is used, thus reducing the energy supply and heat dissipation requirements of the entire system.

[0024] 3. It makes up for the technical problems of large system size, complex system and poor portability when using traditional permanent magnets to replace the excitation solenoid coil to provide a uniform axial bias magnetic field.

[0025] 4. The strip transmission line type strong electromagnetic pulse source based on the periodic distribution of ferrite and permanent magnet core uses the Larmor gyromagnetic precession effect to generate microwaves of a certain frequency, ranging from hundreds of MHz The repetition rate is several GHz and the repetition rate operation capability can reach above kHz.

[0026] 5. The strip transmission line type strong electromagnetic pulse source based on the periodic distribution of ferrite and permanent magnet cores and the axial cascade setting uses high-voltage insulating potting glue to achieve a fully solid-state device.

[0027] 6. The GNLTL provided by the present invention adopts a strip transmission line structure and does not require an external excitation solenoid coil, which is conducive to device modularization and integration and is suitable for application in broadband strong electromagnetic pulse source power coherent synthesis units.

[0028] 7. The microwave center frequency can be adjusted by changing the material and size of the ferrite core; in addition, increasing the length of the planar stripline can extend the oscillation time of the modulated microwave, that is, by adjusting the material type, size and other parameters of the core, as well as adjusting the length of the stripline and other parameters, it is possible to adjust the performance of the entire strip transmission line type strong electromagnetic pulse source to adapt it to different application scenarios.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings used in the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a schematic diagram of the front cross-sectional structure of the strip transmission line type strong electromagnetic pulse source provided by the present invention;

[0032] Figure 2 It is a left-side cross-sectional view of the strip transmission line type strong electromagnetic pulse source provided by the present invention at position AB;

[0033] Figure 3 It is a left-side cross-sectional view of the strip transmission line type strong electromagnetic pulse source provided by the present invention at CD;

[0034] Figure 4 It is a typical input waveform of the strip transmission line type strong electromagnetic pulse source provided by the present invention in the experiment;

[0035] Figure 5 This is a typical output waveform of the strip transmission line type strong electromagnetic pulse source provided by the present invention in an experiment.

[0036] Description of reference numerals:

[0037] 1-upper conductor; 2-lower conductor; 3-high voltage insulating potting glue; 4-permanent magnet core; 5-ferrite core; 6-inner conductor; 7-upper conductor potting injection nozzle; 8-lower conductor potting injection nozzle; 9-coaxial input interface; 10-coaxial output interface; 11-input end sealing gasket; 12-output end sealing gasket; 13-bolt; 14-nut. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] In order to solve the problems of large system size, complex system and poor portability when using traditional excitation solenoid coils to provide axial bias magnetic field in the prior art, and the need for continuous energy supply and heat dissipation, the present application provides a strip transmission line type strong electromagnetic pulse source based on periodic distribution of ferrite and permanent magnets. By designing permanent magnets spaced apart from the periodic distribution of ferrites, an axial bias magnetic field is provided for the ferrites in GNLTLs, which effectively replaces the function of the traditional excitation solenoid coils in the background technology, and the actual length of the permanent magnets used is relatively short, so that the structure of the whole system is simplified and lightweight. As a result, the problems of large size, complex system and poor portability when using traditional permanent magnets to replace excitation solenoid coils to provide uniform axial bias magnetic field are effectively compensated, and the technical requirements for energy supply and heat dissipation of the whole system are reduced.

[0047] The strip transmission line type strong electromagnetic pulse source based on the periodic distribution of ferrite and permanent magnet has a flat structure as a whole, and mainly includes a flat strip line conductor, a composite magnetic core, a high-voltage insulating potting glue 3 and coaxial interfaces arranged at both ends.

[0048] The flat-plate stripline conductor is a three-conductor structure consisting of an upper conductor 1, a lower conductor 2 and an inner conductor 6; wherein the upper conductor 1 and the lower conductor 2 of the two flat-plate structures are both maintained at ground potential; the inner conductor 6 located in the middle and having a circular cross-section is at a high voltage potential; a composite magnetic core is filled between the upper / lower conductors 1 / 2 and the inner conductor 6.

[0049] The composite magnetic core is formed by permanent magnet cores 4 and ferrite cores 5 which are alternately arranged periodically and axially cascaded.

[0050] The inevitable gap between the composite magnetic core and the three-conductor structure is filled with high-voltage insulating potting glue 3.

[0051] For the convenience of description, the following embodiments are described by taking a strip transmission line type strong electromagnetic pulse source according to an embodiment of the present application as an example.

[0052] Figure 1 A schematic structural diagram of a strip transmission line type strong electromagnetic pulse source provided in some embodiments of the present application.

[0053] Please refer to Figure 1 The strip transmission line type strong electromagnetic pulse source is generally composed of an upper conductor 1 of a flat strip line, a lower conductor 2, a high-voltage insulating potting glue 3, a permanent magnet core 4, a ferrite core 5, an inner conductor 6, an upper conductor potting injection nozzle 7, a lower conductor potting injection nozzle 8, a coaxial input interface 9, a coaxial output interface 10, an input end sealing gasket 11, an output end sealing gasket 12, bolts 13 and nuts 14.

[0054] In some embodiments, the upper conductor 1 of the planar strip line is provided with a through hole at its edge, and the lower conductor 2 is provided with a screw hole at a position corresponding to the through hole of the upper conductor 1 ; the gap distance between the upper conductor 1 and the lower conductor 2 is determined by adjusting the length of the bolt 13 .

[0055] The specific implementation is as follows: the bolt 13 is inserted into the through hole of the upper conductor 1 , and is fastened with the nut 14 at the lower surface of the upper conductor 1 ; finally, the bolt 13 is fixed in the screw hole of the lower conductor 2 .

[0056] In some embodiments, the flat upper conductor 1, the lower conductor 2 and the circular inner conductor 6 can be made of metal materials such as brass, stainless steel, and aluminum alloy.

[0057] See also Figures 1 to 3 A block-shaped composite magnetic core is filled between the upper conductor 1, the lower conductor 2 and the inner conductor 6 of the planar transmission line. The composite magnetic core is composed of a sandwich structure in which adjacent rectangular permanent magnet cores 4 are sandwiched with a rectangular ferrite core 5, which are axially cascaded and arranged in a cyclical manner.

[0058] The composite magnetic core has an axial through hole with an inner diameter the same as the outer diameter of the inner conductor 6 opened along the central axis of the transmission line. The block-shaped composite magnetic core tightly wraps the inner conductor 6, and the upper and lower surfaces are tightly fitted with the upper / lower outer conductors 1 / 2.

[0059] In some embodiments, the permanent magnet core 4 may be made of alloy permanent magnet material or ferrite permanent magnet material, and the ferrite core 5 may be made of traditional garnet ferrite or spinel ferrite.

[0060] Please refer to Figure 1 A coaxial connector is installed at the input and output interface of the flat-plate structure strip transmission line type strong electromagnetic pulse source, and the coaxial input interface 9 and the coaxial output interface 10 are installed at the input and output ports respectively.

[0061] Specifically, the coaxial interface includes an interface outer conductor and an interface inner conductor respectively connected to the upper / lower conductor 1 / 2 and the inner conductor 6, which are used to transition the flat structure into a circular coaxial structure; the interface outer conductor includes a rectangular outer conductor and a cylindrical outer conductor vertically arranged at the center of the rectangular outer conductor and axially hollow.

[0062] The outer interface conductor of the coaxial connector is connected to the upper conductor 1 and the lower conductor 2 of the planar stripline, and the inner interface conductor of the coaxial connector is connected to the inner conductor 6 of the planar stripline; the outer interface conductor maintains the ground potential, while the inner interface conductor is connected to the high voltage signal.

[0063] Please refer to Figures 1 to 3 The upper conductor potting injection nozzle 7, the lower conductor potting injection nozzle 8, the input end sealing gasket 11, the output end sealing gasket 12 and the high-voltage insulating potting glue 3 together constitute an insulating potting layer.

[0064] The upper conductor potting injection nozzle 7 and the lower conductor potting injection nozzle 8 are respectively located between the upper conductor 1 and the lower conductor 2 plates at the input end; the high-voltage insulating potting glue 3 is injected simultaneously by the upper conductor potting injection nozzle 7 and the lower conductor potting injection nozzle 8.

[0065] See also Figures 1 to 3 The input end sealing gasket 11 and the output end sealing gasket 12 are respectively clamped at the input end and the output end of the strip transmission line to prevent leakage of the high-voltage insulating potting glue 3; further, the input end sealing gasket 11 and the output end sealing gasket 12 are rectangular gaskets with the same cross-sectional dimensions as the strip transmission line, and in order to ensure that the inner conductor 6 can pass through, there is a through hole in the center with the same size as the outer diameter of the inner conductor 6.

[0066] Before potting, the upper conductor 1 and the lower conductor 2 of the flat strip line are first fixed by bolts 13 and nuts 14, and then the permanent magnet core 4, the ferrite core 5, and the inner conductor 6 are assembled in sequence, and the sealing gasket is further installed. Then, the left and right mold plates are used to abut against the upper / lower conductor 1 / 2 to form a closed potting space, and the liquid high-voltage insulating potting glue 3 is injected from the potting injection nozzle to fill the inevitable gap between the composite magnetic core and the three-conductor structure. After the high-voltage insulating potting glue 3 is cured, the mold is removed to obtain a fully solid and miniaturized flat strip transmission line.

[0067] In some embodiments, the high-voltage insulating potting compound may be polyoxyester insulating potting compound or silicone rubber.

[0068] Through the above design, the strip transmission line type strong electromagnetic pulse source based on the periodic distribution of ferrite and permanent magnet provided in this embodiment can be input through the fast front high voltage pulse source such as Figure 4 The typical fast-front high-voltage pulse waveform shown can effectively output Figure 5 The broadband strong electromagnetic pulse oscillation waveform shown.

[0069] In summary, the present application provides a strip transmission line type strong electromagnetic pulse source, which belongs to the field of high-power microwaves. The overall structure is a flat plate structure, including a flat strip line conductor, a composite magnetic core, a high-voltage insulating potting glue, and a coaxial interface arranged at both ends. The present invention provides an axial bias magnetic field for the ferrite in the nonlinear strip transmission line by designing a permanent magnet that is spaced apart from the ferrite periodic distribution, effectively replacing the function of the traditional excitation solenoid coil in the background technology, and the actual length of the permanent magnet used is relatively short, so that the whole system structure is simplified and lightweight, and can generate broadband high-power microwaves with high center frequency, high repetition rate, and adjustable frequency and microwave oscillation duration. As a result, the technical problems of large size, complex system and poor portability when using traditional permanent magnets to replace excitation solenoid coils to provide a uniform axial bias magnetic field are effectively compensated.

[0070] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and the embodiments having the same structure as the technical idea and exerting the same effect within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, without departing from the scope of the main purpose of the present application, various modifications that can be thought of by those skilled in the art to the embodiments and other methods of combining some of the constituent elements in the embodiments are also included in the scope of the present application.

Claims

1. A strip transmission line type strong electromagnetic pulse source, characterized in that: The overall structure is a flat plate, including a flat strip conductor, a composite magnetic core, a high-voltage insulating potting compound, and coaxial interfaces at both ends; The flat stripline conductor is a three-conductor structure consisting of an upper / lower conductor and an inner conductor; wherein the two flat upper / lower conductors are both kept at ground potential; the inner conductor located in the middle and having a circular cross-section is at high voltage potential; a composite magnetic core is filled between the upper / lower conductor and the inner conductor; The composite magnetic core is formed by alternating and periodically arranging permanent magnet cores and ferrite cores and axially cascading them; The inevitable gap between the composite magnetic core and the three-conductor structure is filled with high-voltage insulating potting glue.

2. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The composite magnetic core is a block structure with an axial through hole in the middle; the inner diameter of the axial through hole is set to be the same as the outer diameter of the inner conductor, so that the inner conductor can axially pass through the composite magnetic core.

3. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The composite magnetic core is formed by a sandwich structure consisting of two adjacent rectangular permanent magnet cores with a rectangular ferrite core sandwiched between them, which is arranged cyclically and tightly combined.

4. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The strip transmission line type strong electromagnetic pulse source also includes a potting injection nozzle arranged on the upper / lower conductor; the high-voltage insulating potting glue adopts polyoxyester insulating potting glue or silicone rubber.

5. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The coaxial interface comprises a coaxial input interface and a coaxial output interface respectively installed at the input and output ports of the strip transmission line type strong electromagnetic pulse source.

6. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The strip transmission line type strong electromagnetic pulse source also includes a sealing gasket arranged between the coaxial interface and the upper / lower conductor; the sealing gasket is a rectangular gasket set with the same cross-sectional size as the strip transmission line type strong electromagnetic pulse source, and a gasket through hole with the same outer diameter as the inner conductor is arranged in the middle for the inner conductor to pass axially.

7. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The flat strip line conductor is made of metal material; the metal material includes but is not limited to one or more combinations of brass, stainless steel, and aluminum alloy.

8. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The permanent magnet core is made of alloy permanent magnet material or ferrite permanent magnet material; the ferrite core is made of garnet ferrite or spinel ferrite.

9. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: The coaxial interface includes an interface outer conductor and an interface inner conductor respectively connected to the upper / lower conductor and the inner conductor, and is used to transition the flat structure into a circular coaxial structure; the interface outer conductor includes a rectangular outer conductor and a cylindrical outer conductor vertically arranged at the center of the rectangular outer conductor and axially hollow.

10. The strip transmission line type strong electromagnetic pulse source according to claim 1, characterized in that: Two flat upper / lower conductors are fixed by bolts; a through hole is provided at the edge of the upper conductor, and a screw hole matching the bolt is provided at the lower conductor corresponding to the through hole of the upper conductor; the gap distance between the upper / lower conductors is regulated by adjusting the length of the bolt.

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