Electromagnetic generation device and microwave equipment

Abstract

The invention provides an electromagnetic generation device and microwave equipment. The electromagnetic generating device comprises an anode piece and a cathode piece, a cathode cavity and a resonant cavity communicated with the cathode cavity are defined by the anode piece, a tuning part is arranged on the cavity wall of the resonant cavity, and the electric size of the resonant cavity is adjusted through the tuning part; and the cathode piece is arranged in the cathode cavity. The electromagnetic generation device provided by the invention can reduce the electromagnetic wave frequency.

Description

Technical Field

[0001] The present application relates to the technical field of microwave devices, and in particular to an electromagnetic generating device and a microwave equipment. Background Art

[0002] An electromagnetic generator is a device or component that can generate electromagnetic waves and is the main component of a microwave device. Existing microwave devices, such as microwave ovens, are used as heating devices. In order to improve the uniformity of heating and thawing food, microwave ovens need to output microwave energy of different frequencies. However, the minimum electromagnetic wave frequency of the electromagnetic generator of an existing microwave oven is high, resulting in a narrow electromagnetic wave frequency range, which cannot meet the demand for a larger working bandwidth of the microwave oven. Summary of the invention

[0003] The present application provides an electromagnetic generating device and a microwave device to solve the technical problem that the minimum value of the electromagnetic wave frequency of the existing electromagnetic generating device is too high.

[0004] In order to solve the above technical problems, the present application provides an electromagnetic generating device, which includes an anode component and a cathode component. The anode component is arranged to form a cathode cavity and a resonant cavity connected to the cathode cavity. The cavity wall of the resonant cavity is provided with a tuning part to adjust the electrical size of the resonant cavity through the tuning part; the cathode component is arranged in the cathode cavity.

[0005] In one embodiment, the tuning portion is protruded from the cavity wall of the resonant cavity to form a groove.

[0006] In one embodiment, the anode member includes a ring-shaped anode member, the resonant cavity includes a plurality of sub-resonant cavities spaced apart along the circumference of the anode member, and the cavity walls of the sub-resonant cavities are provided with a plurality of grooves.

[0007] In one embodiment, the sub-resonant cavity includes a first inner sidewall opposite to the cathode cavity and a second inner sidewall extending from the first inner sidewall to the cathode cavity, and the groove is disposed on the first inner sidewall.

[0008] In one embodiment, a plurality of groups of grooves are provided on the cavity wall of the sub-resonant cavity, and the plurality of groups of grooves are distributed at a first interval period.

[0009] In one embodiment, each group of grooves includes at least two grooves, and the at least two grooves are distributed at a second interval period; and the first interval is different from the second interval.

[0010] In one embodiment, the electromagnetic generating device further includes a dielectric, and the dielectric is disposed in the groove.

[0011] In one embodiment, the dielectric includes a dielectric whose dielectric constant changes with a control voltage, and the electromagnetic generating device further includes a signal generating circuit, which is electrically connected to the dielectric and configured to generate a control voltage to adjust the dielectric constant of the dielectric.

[0012] In one embodiment, the dielectric includes an electrolyte, and the electromagnetic generating device also includes a medium chamber, a pipeline assembly and a pumping assembly. The medium chamber is arranged in the groove for accommodating the electrolyte; the pipeline assembly is connected to the medium chamber; the pumping assembly is connected to the pipeline assembly and is configured to output or collect the electrolyte to the medium chamber to adjust the capacity of the electrolyte in the medium chamber.

[0013] In order to solve the above technical problems, the present application provides a microwave device, which includes the above microwave generating device.

[0014] The beneficial effects of the present application are as follows: the electromagnetic generating device includes an anode member and a cathode member, the anode member is arranged to form a cathode cavity and a resonant cavity connected to the cathode cavity, the cavity wall of the resonant cavity is provided with a tuning part, so as to adjust the electrical size of the resonant cavity through the tuning part; the cathode member is arranged in the cathode cavity. That is, the electromagnetic generating device of the present application can reduce the electromagnetic wave frequency of the electromagnetic generating device by arranging the tuning part on the cavity wall of the resonant cavity of the anode member so that the tuning part increases the electrical size of the resonant cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 It is a structural schematic diagram of an embodiment of an electromagnetic generating device provided by the present application;

[0017] Figure 2 yes Figure 1 A schematic cross-sectional view of the electromagnetic generating device of an embodiment;

[0018] Figure 3 It is a structural schematic diagram of an embodiment of a tuning unit arrangement method provided by the present application;

[0019] Figure 4 It is a structural schematic diagram of another embodiment of the tuning unit arrangement provided in the present application. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0023] An electromagnetic generator is a device or component that can generate electromagnetic waves, and an electromagnetic generator is an important component of a microwave device. The electromagnetic wave frequency range of existing electromagnetic generators is narrow, and cannot meet the needs of microwave devices equipped with electromagnetic generators for different electromagnetic wave frequencies. For example, when a microwave device is used as a heating device, such as a microwave oven, in order to improve the uniformity of heating and thawing food, the microwave oven needs to output microwave energy of different frequencies, and the working frequency bandwidth must be greater than 20MHz. Since the electromagnetic wave frequency of the electromagnetic generator of an existing microwave oven is in the range of 2440-2460MHz, it cannot meet the needs of a larger working bandwidth of the microwave oven.

[0024] In order to solve the above technical problems, the present application provides a microwave device (not shown in the figure), which includes an electromagnetic generating device. Figures 1 to 4 , Figure 1 It is a structural schematic diagram of an embodiment of an electromagnetic generating device provided by the present application; Figure 2 yes Figure 1 A schematic cross-sectional view of the electromagnetic generating device of an embodiment; Figure 3 It is a structural schematic diagram of an embodiment of a tuning unit arrangement method provided by the present application; Figure 4 It is a schematic diagram of another embodiment of the arrangement of the tuning part provided in the present application. The electromagnetic generating device 10 includes an anode element 110 and a cathode element (not marked in the figure).

[0025] The anode member 110 is surrounded to form a cathode cavity 112 and a resonant cavity 111 connected to the cathode cavity 112. The cathode member is disposed in the cathode cavity 112 and is spaced apart from the anode member 110. The cavity wall of the resonant cavity 111 is provided with a tuning portion 113. The tuning portion 113 can increase the surface area of ​​the cavity wall of the resonant cavity 111, so that the electrical size of the resonant cavity 111 is increased, thereby reducing the electromagnetic wave frequency of the electromagnetic generating device 10, and further widening the bandwidth of the electromagnetic wave frequency of the electromagnetic generating device 10.

[0026] In one embodiment, the tuning portion 113 is convexly disposed on the cavity wall of the resonant cavity 111 to form a groove (marked in the figure). It can be known that the groove has a convex portion (not marked in the figure) and a concave portion (not marked in the figure), and the concave-convex surface design increases the surface area of ​​the cavity wall of the resonant cavity 111, thereby increasing the electrical size of the resonant cavity 111. In addition, the processing method of the groove is simple, and it is easy to process the anode member 110.

[0027] In one embodiment, the groove may be a circular groove, a rectangular groove or other regular shapes that are easy to process, which is not limited here.

[0028] In one embodiment, the anode member 110 is an annular anode member, and the groove may extend along the axial direction X of the anode member 110 , or along the circumferential direction Y of the anode member 110 , or the groove may extend at an angle, etc., which is not limited here.

[0029] In one embodiment, the cavity wall of the resonant cavity 111 is formed with a plurality of grooves, and the sizes of the plurality of grooves may be the same or different, which is not limited here. In this embodiment, by providing a plurality of grooves, the electrical size of the resonant cavity 111 is further increased through the plurality of grooves, so as to further reduce the electromagnetic wave frequency of the electromagnetic generating device 10.

[0030] In one embodiment, in order to increase the electrical size of the resonance cavity 111 and reduce the electromagnetic wave frequency of the electromagnetic generating device 10, the anode member 110 is a ring-shaped anode member 110, and the cavity wall of the resonance cavity 111 is provided with a plurality of grooves, and the plurality of grooves can be arranged along the axial direction X of the anode member 110, or along the circumferential direction Y of the anode member 110, which is not limited here.

[0031] In one embodiment, the anode member 110 includes a ring-shaped anode member 110, and the resonant cavity 111 includes a plurality of sub-resonant cavities (see reference numeral 111) spaced apart along the circumferential direction Y of the anode member 110, and a plurality of grooves are provided on the cavity wall of the sub-resonant cavity. That is, in each sub-resonant cavity, a plurality of grooves are provided on the cavity wall of the sub-resonant cavity, so as to reduce the frequency of the electromagnetic wave of the electromagnetic generating device 10 by increasing the electrical size of each sub-resonant cavity.

[0032] In one embodiment, the sub-resonant cavity includes a first inner sidewall 114 opposite to the cathode cavity 112 and a second inner sidewall 115 extending from the first inner sidewall 114 to the cathode cavity 112, and the groove is provided on the first inner sidewall 114. Specifically, the cathode cavity 112 is located in the middle of the anode member 110, and the inner wall of the anode member 110 is recessed to form a plurality of sub-resonant cavities arranged at intervals, the inner sidewall of the sub-resonant cavity opposite to the cathode cavity 112 is the first inner sidewall 114, and the inner sidewall extending from the first inner sidewall 114 to the cathode cavity 112 is the second inner sidewall 115. The groove of this embodiment is provided on the first inner sidewall 114, that is, this embodiment increases the electrical size of the resonant cavity 111 by increasing the resonant inductance, while ensuring that the resonant capacitance remains unchanged, and can reduce the electromagnetic wave frequency of the electromagnetic generating device 10.

[0033] In one embodiment, a plurality of groups of grooves are provided on the cavity wall of the sub-resonant cavity, and the plurality of groups of grooves are distributed with a first interval period. For example, depending on the application scenario, the spacing between the plurality of groups of grooves can be a few tenths of a millimeter or a few centimeters. For example, when the operating frequency range of the electromagnetic generating device is 2400-2500 MHz, the spacing between the plurality of groups of grooves can be a few tenths of a millimeter to a few millimeters. Among them, the first interval period can be determined according to the size of the first inner side wall 114 in the circumferential direction Y, the required minimum electromagnetic wave frequency of the electromagnetic generating device 10, etc., and is not limited here. For example, three groups of grooves are provided on the cavity wall of each sub-resonant cavity, and the three groups of grooves are distributed on the first inner side wall 114 of the sub-resonant cavity along the circumferential direction Y of the anode member 110 at intervals of 5 cm.

[0034] The wall of the sub-resonant cavity of this embodiment is provided with multiple groups of grooves, and the multiple groups of grooves increase the electrical size of the resonant cavity 111. In addition, the multiple groups of grooves are distributed at a first interval period, so that the electrical size of the resonant cavity 111 is more accurate, so as to obtain the required minimum electromagnetic wave frequency of the electromagnetic generating device 10.

[0035] In one embodiment, each group of grooves includes at least two grooves, and the at least two grooves are distributed at a second interval period. The first interval is different from the second interval. For example, the first inner side wall 114 is provided with 3 groups of grooves, and each group of grooves includes 4 grooves. Among them, the 3 groups of grooves are arranged along the circumferential direction Y of the anode member 110 at an interval of 0.3 mm, and the 4 grooves in the group are arranged along the circumferential direction Y of the anode member 110 at an interval of 2 mm; or the 3 groups of grooves are arranged along the axial direction X of the anode member 110 at an interval of 2 mm, and the 4 grooves in the group are arranged along the circumferential direction Y of the anode member 110 at an interval of 0.3 mm; or the 3 groups of grooves are arranged along the circumferential direction Y of the anode member 110 at an interval of 5 mm, and the 4 grooves in the group are arranged along the axial direction X of the anode member 110 at an interval of 2 mm; or the 3 groups of grooves are arranged along the circumferential direction Y of the anode member 110 at an interval of 5 mm, and the 4 grooves in the group are arranged along the circumferential direction Y of the anode member 110 at an interval of 2 mm, etc.

[0036] In one embodiment, the interval between the protrusions of two adjacent grooves includes 0.1 mm-100 mm, for example, 0.1 mm, 0.5 mm, 1 mm, 15 mm, 19 mm, 23 mm, 60 mm, 85 mm, etc.

[0037] In one embodiment, along the axial direction Z of the anode member 110 , the sizes of the protruding portion and the recessed portion of the groove are the same as the sizes of the anode member 110 , so that the anode member 110 is easy to process.

[0038] In one embodiment, the tuning part 113 includes a plurality of metal parts (not shown in the figure), the metal parts are connected to the cavity wall of the resonant cavity 111, the plurality of metal parts are arranged along the circumferential direction Y of the anode part 110 at a first interval or a second interval, and the metal parts are integrally formed with the anode part 110. In other embodiments, the metal parts can be regarded as the protruding parts of the grooves, and the intervals between the metal parts can be regarded as the concave parts of the grooves, so the arrangement of the plurality of metal parts can refer to the arrangement of the above-mentioned grooves, which will not be described in detail here.

[0039] In one embodiment, the electromagnetic generating device 10 further includes a dielectric (not marked in the figure), and the dielectric is disposed in the groove, or in other words, the dielectric is disposed in the recessed portion of the cavity wall of the resonant cavity 111, such as the recessed portion of the first inner side wall, the recessed portion between adjacent grooves, and the recessed portion of the groove. The dielectric is insulated from the anode member 110, for example, an insulating layer is disposed between the dielectric and the anode member 110. It can be known that the dielectric constant of the dielectric is greater than the dielectric constant of air, and therefore, the dielectric can increase the resonant capacitance of the resonant cavity 111, that is, this embodiment can further reduce the electromagnetic wave frequency of the electromagnetic generating device 10 by adding a dielectric in the groove. The dielectric constants of the dielectrics in different grooves can be the same or different, and are not limited here.

[0040] In one embodiment, the dielectric includes a dielectric whose dielectric constant changes with a control voltage, and the electromagnetic generator 10 also includes a signal generating circuit (not marked in the figure), and the signal generating circuit is electrically connected to the dielectric. The signal generating circuit is configured to generate a control voltage to adjust the dielectric constant of the dielectric. The electromagnetic generator 10 of this embodiment is provided with a signal generating circuit so that the signal generating circuit generates control voltages of different values ​​to change the dielectric constant of the dielectric through control voltages of different values, so that the electromagnetic wave frequency of the electromagnetic generator 10 of this embodiment can be dynamically adjusted. In addition, compared with the existing mechanical adjustment method, for example, the electromagnetic wave frequency of the electromagnetic generator 10 is changed by rotating the rotating blades with a rotating device, because the electromagnetic generator 10 is in a high temperature state when working, the metal structure is thermally expanded and lubricated, and the rotating device is easily worn, causing the working state to fail. In this embodiment, the electromagnetic wave frequency of the electromagnetic generator 10 is changed by the signal generating circuit generating a control voltage, and the heating of the electromagnetic generator 10 has almost no effect on the signal generating circuit. Therefore, the electromagnetic generator 10 of the present application has strong working stability and can extend the service life.

[0041] In other embodiments, the signal generating circuit may also be a signal generating circuit of a microwave device.

[0042] For example, when the dielectric constant is 10, the frequency of the electromagnetic wave of the electromagnetic generating device 10 is 2.483 GHz; when the dielectric constant is 35, the frequency of the electromagnetic wave of the electromagnetic generating device 10 is 2.416 GHz.

[0043] In one embodiment, the material of the dielectric is a phase change material. When a voltage is applied to the dielectric, the dielectric constant of the dielectric changes. The change in the dielectric constant of the dielectric causes the intervals between the grooves and the size of the concave portion of the groove to change, so that the electrical size of the resonant cavity 111 changes, thereby changing the frequency of the electromagnetic wave of the electromagnetic generating device 10. The speed and period of the electromagnetic generating device 10 are determined by the speed and period of adjusting the dielectric constant by the control voltage.

[0044] In one embodiment, the dielectric includes an electrolyte. The electromagnetic generating device 10 also includes a dielectric cavity (not marked in the figure), which is arranged in the groove, and the dielectric cavity is used to contain the electrolyte. Among them, the capacity of the electrolyte in different dielectric cavities can be the same or different, which is not limited here. The electrolyte can be an electrolyte with high temperature stability, and stability means that the electrolyte will not decompose under high temperature conditions, or will not react with the dielectric cavity, etc.

[0045] The dielectric of this embodiment is an electrolyte, and the electromagnetic generator 10 also includes a dielectric cavity, which is arranged in the groove and is used to contain the electrolyte. The electrolyte can change the capacitance of the resonant capacitor without the electromagnetic generator 10 providing any external conditions, so that the structure of the electromagnetic generator 10 is simple and easy to implement.

[0046] In one embodiment, the dielectric includes multiple electrolytes with different dielectric constants. Different dielectric chambers can contain one electrolyte, or the dielectric chamber can contain multiple different electrolytes. Wherein, when the dielectric chamber contains multiple different electrolytes, it can be achieved by providing multiple isolated sub-dielectric chambers, or the multiple electrolytes are insoluble in each other and do not react with each other at high temperatures, which is not limited here.

[0047] The dielectric of this embodiment includes multiple electrolytes with different dielectric constants. Different electrolytes can be set in different dielectric cavities or in the same dielectric cavity, which can accurately change the actual dielectric constant of the resonant capacitor, thereby further reducing the electromagnetic wave frequency of the electromagnetic generating device 10.

[0048] In one embodiment, the electromagnetic generating device 10 further includes a pipeline assembly (not labeled in the figure) and a pumping assembly (not labeled in the figure). The pipeline assembly is connected to the medium cavity and the pumping assembly respectively, that is, the pipeline assembly serves as a medium for the electrolyte to enter and exit the medium cavity. The pumping assembly is connected to the pipeline assembly and is configured to output or collect electrolyte to the medium cavity. That is, the pumping assembly provides power for the electrolyte to enter and exit the medium cavity, so the capacity of the electrolyte in the medium cavity can be adjusted, that is, the resonant capacitance of the electromagnetic generating device 10 can be dynamically adjusted, thereby realizing the adjustable frequency of the electromagnetic waves of the electromagnetic generating device 10. For example, when the capacity of the electrolyte in the dielectric cavity is 0, the equivalent dielectric constant of the resonant capacitor is ε1, and the electromagnetic wave frequency of the electromagnetic generating device 10 is f1; when the capacity of the electrolyte in the dielectric cavity is V1, the equivalent dielectric constant of the resonant capacitor is ε2, and the electromagnetic wave frequency of the electromagnetic generating device 10 is f2; when the capacity of the electrolyte in the dielectric cavity is V2, the equivalent dielectric constant of the resonant capacitor is ε3, and the electromagnetic wave frequency of the electromagnetic generating device 10 is f3; wherein, V1 and V2 may be the height of the dielectric cavity; or V1 and V2 may be the length of the dielectric cavity; or V1 and V2 may be the width of the dielectric cavity, which is not limited here.

[0049] The electromagnetic generating device 10 of this embodiment can dynamically adjust the resonant capacitance of the resonant cavity 111 by setting a pipeline component and a pumping component, so that the electromagnetic wave frequency of the electromagnetic generating device 10 is adjustable. In addition, compared with the existing mechanical adjustment method, such as using a rotating device to rotate the rotating blades to change the electromagnetic wave frequency of the electromagnetic generating device 10, since the electromagnetic generating device 10 is in a high temperature state when working, the metal structure expands thermally and lubrication is difficult, and the rotating device is easily worn, causing the working state to fail. In this embodiment, the pumping component is used as a method to adjust the electromagnetic wave frequency of the electromagnetic generating device 10, and the heating of the electromagnetic generating device 10 has little effect on the pumping component. Therefore, the electromagnetic generating device 10 of the present application has strong working stability and can extend the service life.

[0050] In one embodiment, the electromagnetic generating device 10 further includes a housing 130, wherein the anode member 110, the cathode member, etc. are disposed in the housing 130, and the pumping assembly 123 is disposed outside the housing 130. The housing 130 performs vacuum sealing on the resonant cavity 111 and the cathode cavity 112 to ensure the normal operation of the electromagnetic generating device 10, and the pumping assembly 123 is disposed outside the housing 130 to ensure that the pumping assembly 123 can operate normally and is not affected by the internal environment of the housing 130, thereby ensuring the working stability of the electromagnetic generating device 10.

[0051] In one embodiment, the pipeline assembly includes a quartz pipe. The quartz pipe refers to a pipe made of quartz material. The quartz pipe has the characteristics of high temperature and high pressure resistance. When the electromagnetic generating device 10 is in a high temperature state, the pipeline assembly includes a quartz pipe, which can improve the stability of the electromagnetic generating device 10. It is worth noting that the surface of the pipe body in the pipeline assembly located outside the shell 130 is provided with a shielding layer (not marked in the figure), and the shielding layer can prevent microwave energy from leaking. For example, the shielding layer can be a metal coating, which is not limited here.

[0052] In one embodiment, the pumping component includes a hydraulic pump, which is a conventional hydraulic pump, and can reduce the hardware development cycle of the pumping component.

[0053] In one embodiment, the electromagnetic generating device 10 further includes a control circuit (not shown), which is electrically connected to the pumping assembly and configured to generate control parameters of the pumping assembly to adjust the delivery cycle or speed of the electrolyte. In other embodiments, the control circuit may also be a control circuit of a microwave device, which is not limited here.

[0054] In one embodiment, the microwave device may be an electromagnetic heating device. For example, the microwave heating device may be a microwave oven, a microwave steaming oven, a microwave fryer, a microwave rice steaming oven, a microwave heating stove, or other microwave heating device, which is not limited here. The microwave device may also be a radar system, etc., which is not limited here.

[0055] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An electromagnetic generating device, characterized in that: include: an anode member, which surrounds a cathode cavity and a resonant cavity connected to the cathode cavity, wherein a cavity wall of the resonant cavity is provided with a tuning portion, so as to adjust the electrical size of the resonant cavity through the tuning portion; The cathode component is arranged in the cathode cavity.

2. The electromagnetic generating device according to claim 1, characterized in that: The tuning part is protruded from the cavity wall of the resonant cavity to form a groove.

3. The electromagnetic generating device according to claim 2, characterized in that: The anode member includes an annular anode member, the resonant cavity includes a plurality of sub-resonant cavities spaced apart along the circumference of the anode member, and a cavity wall of the sub-resonant cavity is provided with a plurality of the grooves.

4. The electromagnetic generating device according to claim 3, characterized in that: The sub-resonant cavity includes a first inner side wall opposite to the cathode cavity and a second inner side wall extending from the first inner side wall to the cathode cavity, and the groove is provided on the first inner side wall.

5. The electromagnetic generating device according to claim 3, characterized in that: A plurality of groups of the grooves are arranged on the cavity wall of the sub-resonant cavity, and the plurality of groups of the grooves are distributed at a first interval period.

6. The electromagnetic generating device according to claim 5, characterized in that: Each group of the grooves includes at least two grooves, and the at least two grooves are distributed at a second interval period; The first interval is different from the second interval.

7. The electromagnetic generating device according to any one of claims 2 to 6, characterized in that: The electromagnetic generating device also includes: The dielectric is disposed in the groove.

8. The electromagnetic generating device according to claim 7, characterized in that: The dielectric includes a dielectric whose dielectric constant changes with a control voltage, and the electromagnetic generating device also includes: The signal generating circuit is electrically connected to the dielectric and configured to generate the control voltage to adjust the dielectric constant of the dielectric.

9. The electromagnetic generating device according to claim 7, characterized in that: The dielectric includes an electrolyte, and the electromagnetic generating device also includes: A medium cavity, disposed in the groove, for containing the electrolyte; A pipeline assembly, connected to the medium cavity; The pumping assembly is communicated with the pipeline assembly and is configured to output or collect the electrolyte to the medium cavity to adjust the capacity of the electrolyte in the medium cavity.

10. A microwave device, characterized in that: include: The electromagnetic generating device according to any one of claims 1 to 9.

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