Electromagnetic shielding shell of electromagnetic shielding room

Abstract

The invention discloses an electromagnetic shielding shell of an electromagnetic shielding room, which belongs to the technical field of electromagnetic shielding and comprises an electromagnetic shielding room body, a plurality of electromagnetic shielding shells are arranged in the electromagnetic shielding room body, and thermal power generation components and temperature sensors are mounted in the electromagnetic shielding shells. A multi-layer composite shielding structure is formed by the wave-absorbing cone, the phase regulation corrugated plate and the lattice-like lining layer, a broadband absorption system with complementary functions is formed, waste heat can be converted into electric energy by arranging the thermal power generation assembly, the temperature sensor and the ventilation groove, self-sustaining electric power is provided for the temperature sensor, and the temperature sensor is protected from being damaged. The state of the wave-absorbing material is evaluated in real time by analyzing temperature data, health early warning and preventive maintenance are achieved, the lattice-like lining layer can adjust lattice parameters to customize electromagnetic performance, the porous structure gives consideration to mechanical performance and shielding effect, the weight of the shell can be reduced, and the structural adaptability of the shell can be improved.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic shielding technology, and more particularly to the electromagnetic shielding shell of an electromagnetic shielding room. Background Technology

[0002] Electromagnetic shielding rooms are key facilities used to isolate internal and external electromagnetic environments, ensure the normal operation of internal electronic equipment, or prevent electromagnetic information leakage. They are widely used in military, communications, medical, and scientific research fields. Their core structure is an electromagnetic shielding shell, which attenuates electromagnetic energy by reflecting and absorbing electromagnetic waves, thus protecting external equipment and personnel from electromagnetic radiation. Existing electromagnetic shielding shells mostly use metal plates or metal mesh to form a Faraday cage to achieve shielding effectiveness, and lay wave-absorbing materials (such as foam wave-absorbing cones) on the inside to absorb the electromagnetic waves reflected from the inside and prevent reverberation and clutter interference. However, existing absorbing materials are only effective at absorbing high-frequency electromagnetic waves, and have limited absorption capacity for very low frequency (VLF) to low frequency (LF) electromagnetic waves with extremely long wavelengths. These low-frequency electromagnetic waves can easily penetrate conventional absorbing layers and form reflected waves and standing waves under the reflection of the inner wall of the shielding chamber, which will interfere with the conduct of precision experiments. In order to improve the shielding effectiveness against the above electromagnetic waves, the existing solutions are to increase the thickness of the shielding layer or use heavy materials. This results in the huge weight of the entire shielding shell, which puts too high a demand on the structural bearing capacity of the shielding chamber body and increases the construction cost and difficulty. Meanwhile, the shielding shell and its absorbing materials will experience performance degradation due to thermal aging and physical damage under long-term high-power radiation. However, existing electromagnetic shielding shells lack real-time, online monitoring methods for the health status of the shielding body itself. They can only be repaired after the shielding effectiveness has significantly decreased, and cannot perform preventive maintenance, which poses a potential risk to the continuity of experiments and the safety of personnel and equipment. Therefore, an electromagnetic shielding shell for an electromagnetic shielding room is proposed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of insufficient performance of electromagnetic shielding shells in the low-frequency band, bulky broadband shielding structures, and lack of self-monitoring capability in the existing technology, and to propose an electromagnetic shielding shell for electromagnetic shielding rooms.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: The electromagnetic shielding shell of the electromagnetic shielding room includes an electromagnetic shielding room body. A ventilation system is provided above the electromagnetic shielding room body. Multiple mounting brackets arranged in pairs are provided on the inner side wall of the electromagnetic shielding room body. An electromagnetic shielding shell is fixed on each set of mounting brackets. Multiple wave-absorbing cones are provided on the side of the electromagnetic shielding shell facing the interior of the electromagnetic shielding room body. The electromagnetic shielding shell comprises a semi-open shell, a ventilation slot is formed on one side of the shell towards the mounting rack, two mounting slots are arranged in the center of the shell, a thermoelectric generator and a temperature sensor are arranged in the two mounting slots respectively, the temperature sensor is electrically connected with the thermoelectric generator, and the open part of the shell is sequentially provided with a heat conduction plate, a crystal lattice-like lining, a phase control corrugated plate and a wave-transparent cover plate from inside to outside. The thermoelectric generator comprises a mounting plate, the mounting plate is provided with a thermoelectric generator on one side of the shell, and a control box and a heat dissipation fin are arranged on the center of the side of the mounting plate away from the thermoelectric generator.

[0005] Preferably, the hot end of the thermoelectric generator is in abutment with the heat conduction plate, the cold end of the thermoelectric generator is fixedly connected with the mounting plate, the heat dissipation fin is arranged on both sides of the control box, the heat dissipation fin is perpendicular to the ground, and the control box is electrically connected with the temperature sensor.

[0006] Preferably, the joint surface of the mounting plate and the shell is provided with an electromagnetic sealing gasket made of conductive material.

[0007] Preferably, the crystal lattice-like lining is made of a metal additive process and comprises a micro rectangular frame and an inner skeleton, the rectangular frame and the inner skeleton are both provided with a cylindrical outer wall, and the rectangular frame and the inner skeleton form a hole structure for promoting the loss of incident electromagnetic waves.

[0008] Preferably, the phase control corrugated plate is made of a polymer doped with magnetic fillers through a bending process, the corrugated shape of the phase control corrugated plate is a continuous triangular prism, and the depth of the triangular groove between the corrugations of the phase control corrugated plate is 25mm.

[0009] Preferably, the material of the wave-transparent cover plate is an alumina ceramic plate, one side of the wave-transparent cover plate is fixedly connected with the shell, and the other side of the wave-transparent cover plate is fixedly connected with a wave-absorbing cone.

[0010] Preferably, the heat conduction plate and the crystal lattice-like lining and the crystal lattice-like lining and the phase control corrugated plate are adhered through high-temperature conductive glue.

[0011] Compared with the prior art, the present application has the following advantages: 1、The present application forms a wide-band absorption system with complementary functions by a multi-layer composite shielding structure composed of wave-absorbing cones, phase control corrugated plates and lattice-like lining, the wave-absorbing cones are mainly responsible for the absorption of wide-band and medium-high frequency electromagnetic waves, the phase control corrugated plates use the resonance phase cancellation principle to specifically target very low frequency to low frequency band strong electromagnetic interference for destructive interference through its specific geometric structure, effectively making up for the performance short board of traditional wave-absorbing materials in this frequency band, and the lattice-like lining further excites electromagnetic wave multiple reflection and resonance through its micro-porous structure to convert it into heat, so that the shielding shell has excellent electromagnetic shielding performance in a wide range from low frequency to high frequency.

[0012] 2、The present application can convert the waste heat generated in the electromagnetic shielding process into electrical energy to provide self-sustaining power for the built-in temperature sensor, realize the recycling of energy, and indirectly and in real time evaluate the performance state of the wave-absorbing material by analyzing the change of temperature data under fixed test conditions, realize the early warning of the health of the shielding shell, and enable the staff to perform preventive maintenance before the shielding effectiveness appears abnormal.

[0013] 3、The present application allows the effective electromagnetic parameters to be customized by adjusting the lattice parameters through the setting of the lattice-like lining, realizes strong absorption and wide-band matching of specific frequency bands, and at the same time, the porous hollow structure greatly reduces the overall weight of the shielding shell while ensuring the mechanical properties and shielding effect, reduces the requirements for the bearing of the shielding room body structure, and combines the effective use of waste heat by the thermoelectric generator and the enhancement of the heat dissipation capacity by the ventilation slot to improve the structural adaptability, thermal stability and economy of the shielding shell. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The present application is an electromagnetic shielding shell of an electromagnetic shielding room, and the external structure schematic diagram of the electromagnetic shielding shell is shown in the figure. Figure 2 The present application is an electromagnetic shielding shell of an electromagnetic shielding room, and the internal structure schematic diagram of the electromagnetic shielding shell is shown in the figure. Figure 3 The present application is an electromagnetic shielding shell of an electromagnetic shielding room, and the assembly drawing of the electromagnetic shielding shell and the wave-absorbing cone in the electromagnetic shielding shell is shown in the figure. Figure 4 The present application is an electromagnetic shielding shell of an electromagnetic shielding room, and the structure assembly drawing of the electromagnetic shielding shell is shown in the figure. Figure 5 The present application is an electromagnetic shielding shell of an electromagnetic shielding room, and the back structure schematic diagram of the electromagnetic shielding shell is shown in the figure. Figure 6 The present application is an electromagnetic shielding shell of an electromagnetic shielding room, and the front structure schematic diagram of the thermoelectric generator and the temperature sensor in the electromagnetic shielding shell is shown in the figure. Figure 7The back structure diagram of the thermoelectric power generation assembly and the temperature sensor in the electromagnetic shielding shell of the electromagnetic shielding chamber of the present application; Figure 8 The microstructure diagram of the crystal lattice-like lining in the electromagnetic shielding shell of the electromagnetic shielding chamber of the present application; Figure 9 The assembly diagram of the rectangular frame and the inner skeleton in the electromagnetic shielding shell of the electromagnetic shielding chamber of the present application.

[0015] In the figure: 1, electromagnetic shielding chamber body; 2, ventilation system; 3, mounting frame; 4, wave-absorbing cone; 5, shell; 6, ventilation groove; 7, temperature sensor; 8, heat-conducting plate; 9, crystal lattice-like lining; 901, rectangular frame; 902, inner skeleton; 10, phase control corrugated plate; 11, wave-transparent cover plate; 12, mounting plate; 13, thermoelectric generator; 14, heat dissipation fin; 15, electromagnetic sealing gasket. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom end" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "sleeved / connected", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] Embodiment, refer to Figures 1 to 9The electromagnetic shielding shell of the electromagnetic shielding chamber comprises an electromagnetic shielding chamber body 1, a ventilation system 2 is arranged above the electromagnetic shielding chamber body 1, the inner side wall of the electromagnetic shielding chamber body 1 is provided with a plurality of mounting racks 3 arranged in pairs, one electromagnetic shielding shell is fixed on each group of mounting racks 3, and a plurality of wave-absorbing cones 4 are arranged on the side of the electromagnetic shielding shell facing the inside of the electromagnetic shielding chamber body 1; the wave-absorbing cones 4 are made of carbon-based composite foam material, and the height and spacing of the wave-absorbing cones 4 are set according to the required absorption frequency of electromagnetic waves. The electromagnetic shielding shell comprises a semi-open shell 5, ventilation grooves 6 are formed in the side of the shell 5 facing the mounting racks 3, and are used to support the operation of the thermoelectric generator 13; the center of the shell 5 is provided with two mounting grooves, and a thermoelectric generation assembly and a temperature sensor 7 are arranged in the two mounting grooves respectively; the temperature sensor 7 is electrically connected with the thermoelectric generation assembly; and from the inside to the outside of the open part of the shell 5, a heat-conducting plate 8, a lattice-like lining layer 9, a phase control corrugated plate 10 and a wave-transparent cover plate 11 are sequentially arranged.

[0020] The thermoelectric generation assembly comprises a mounting plate 12, the side of the mounting plate 12 facing the shell 5 is provided with a thermoelectric generator 13, and a control box and a heat dissipation fin 14 are arranged at the center of the side of the mounting plate 12 away from the thermoelectric generator 13.

[0021] It should be noted that the thermoelectric generator 13 is a prior art; when there is a temperature difference between the two ends of the thermocouple composed of two different semiconductor materials in the thermoelectric generator 13, charge carriers will diffuse from the hot end to the cold end, thereby generating a direct current electromotive force in the loop, which is used to directly convert the waste heat generated in the electromagnetic shielding process into electrical energy.

[0022] The advantages of the above-mentioned thermoelectric generation assembly are that through the joint action of the thermoelectric generation assembly and the temperature sensor 7, the waste heat generated in the electromagnetic shielding process can be recovered to drive the temperature sensor 7 to work, and the state of the electromagnetic shielding shell can be indirectly monitored through the temperature sensor 7; under the same test power and heat dissipation conditions, if the temperature reading monitored by the temperature sensor 7 is significantly higher than the historical baseline data, it means that the wave-absorbing material has been consumed or aged, resulting in a decrease in wave-absorbing efficiency and an increase in heat conversion efficiency; based on this, the staff can perform preventive maintenance before the shielding appears abnormally, and the safety of the experimental equipment and the experimental personnel can be better ensured during the experiment.

[0023] It should be noted that the electromagnetic shielding chamber body 1 and the ventilation system 2 are prior arts; the electromagnetic shielding chamber body 1 is assembled by modular metal plates to ensure good electromagnetic isolation performance, and the ventilation system 2 comprises a waveguide type ventilation window, which can cut off electromagnetic wave leakage while ensuring indoor air circulation.

[0024] Further, the hot end of the thermoelectric generator 13 is in abutment with the heat-conducting plate 8, and the cold end of the thermoelectric generator 13 is fixedly connected with the mounting plate 12. Based on the Seebeck effect, the temperature difference between the two ends is used to realize the power generation function. The heat dissipation fins 14 are located on both sides of the control box and are perpendicular to the ground. The control box is electrically connected with the temperature sensor 7. It should be noted that the control box is integrated with the control circuit, the micro antenna and the small capacitor in the prior art. When the electromagnetic wave is absorbed and converted into heat energy by the shielding shell and the wave-absorbing structure, a temperature gradient is formed between the hot end and the cold end of the thermoelectric generator 13. Based on the Seebeck effect, the temperature gradient is directly converted into a corresponding direct current voltage and output to the control box, realizing the effective recovery of waste heat energy in the electromagnetic shielding process. Then, the control box supplies power to the temperature sensor 7, providing completely self-sufficient energy supply for the temperature sensor 7.

[0025] The above further benefits are that, under the joint action of the heat generation assembly and the ventilation groove 6, the air flow guided by the ventilation system 2 flows in the ventilation groove 6, which not only maintains a low-temperature environment for the cold end of the thermoelectric generator 13 by taking away the heat of the heat dissipation fins 14, but also strengthens the heat dissipation of the back of the shell, effectively avoiding heat accumulation, thereby ensuring the thermal stability and structural reliability of the shielding shell under long-term high-power radiation.

[0026] Further, the joint surface of the mounting plate 12 and the shell 5 is provided with an electromagnetic sealing gasket 15 made of conductive material. When the mounting plate 12 is fastened, the electromagnetic sealing gasket 15 is compressed and fills the microscopic uneven gaps by its own elasticity, forming a continuous conductive path covering the gaps, so that the mounting plate 12 and the shell 5 maintain equipotential, avoiding the weakening of the electromagnetic shielding effect by the gaps. Further, the crystal lattice-like lining 9 is made of a metal additive process and includes a micro rectangular frame 901 and an inner skeleton 902. The rectangular frame 901 and the inner skeleton 902 are both provided with a cylindrical outer wall, and the rectangular frame 901 and the inner skeleton 902 form a hole structure that promotes the loss of incident electromagnetic waves. It should be noted that the hole structure refers to a continuous and air-filled space enclosed by the outer rectangular frame 901 and the internal multiple inner skeletons 902. When the electromagnetic wave enters the hole, it will hit the cylindrical outer wall of the inner skeleton 902 and the inner wall of the rectangular frame 901 and be strongly reflected. The above-mentioned cylindrical curved surface will cause the reflected wave to be diffusely scattered, changing the direction of wave propagation. This makes the electromagnetic wave collide back and forth inside the hole structure, making the propagation path complex and long, and forming a standing wave inside the hole, i.e. electromagnetic resonance. Under the resonance state, the surface of the inner skeleton 902 will induce strong alternating current (eddy current). Since the metal has a certain resistance, these eddy currents will follow Joule's law and directly convert electromagnetic energy into heat energy during the flow process.

[0027] The further advantage of the above is that when the electromagnetic wave penetrates the wave-absorbing cone 4, the wave-transparent cover plate 11 and the phase control corrugated plate 10 and is incident on the quasi-lattice lining 9, the hole structure formed by the micro rectangular frame 901 and the inner skeleton 902 can excite multiple reflections and resonance of the electromagnetic wave, thereby converting electromagnetic energy into heat energy to achieve shielding effect. The porous and hollow lattice form of the quasi-lattice lining 9 reduces the material usage while ensuring mechanical properties and shielding effect, thereby greatly reducing the overall weight of the shielding shell, reducing the requirement for the structure bearing of the electromagnetic shielding chamber body 1, and improving the structural adaptability and economy of the electromagnetic shielding shell. At the same time, since the quasi-lattice lining 9 is made by metal additive process, the effective electromagnetic parameters can be accurately controlled by adjusting the lattice parameters during production. By changing the size of the rectangular frame 901, the arrangement of the inner skeleton 902 and the diameter of the cylindrical wall, the effective electromagnetic parameters can be controlled, thereby realizing strong absorption and wide band matching of electromagnetic waves of specific frequency bands, and can be customized according to actual test needs.

[0028] Further, the phase control corrugated plate 10 is made of polymer doped with magnetic filler by bending process. The corrugated shape of the phase control corrugated plate 10 is a continuous triangular prism. The depth of the triangular groove between the corrugations in the phase control corrugated plate 10 is set to 25 mm, which is used for strong electromagnetic interference environment from very low frequency (VLF) to low frequency (LF) segment. This depth corresponds to 1 / 400 of the low frequency free space wavelength (10 m) which is most easily penetrated by the wave-absorbing cone 4. This ratio meets the geometric parameter requirement of resonant phase cancellation, which can ensure that the path difference between the wave reflected from the groove bottom and the wave reflected from the groove opening satisfies the phase difference of 180°, thereby generating stable destructive interference. The further advantage of the above is that based on the resonant phase cancellation principle, the phase control corrugated plate 10 can make the electromagnetic wave reflected from the groove bottom and the electromagnetic wave reflected from the groove opening have a phase difference of 180° when returning, thereby causing destructive interference and significantly reducing the specular reflection energy of long waves in the very low frequency to low frequency segment, making up for the performance deficiency of the traditional wave-absorbing cone 4 in this frequency segment. Through this geometric phase control, the wave-absorbing cone 4 and the quasi-lattice lining 9 form a complement. The wave-absorbing cone 4 is responsible for the absorption of wide and low frequency short waves, microwaves and millimeter waves, and the corrugated plate is specially designed to solve the strong penetration problem of low frequency long waves. Finally, the quasi-lattice lining 9 realizes efficient heat conversion of low frequency long waves, so that the electromagnetic shielding shell has high performance from low frequency to high frequency.

[0029] Furthermore, the material of the wave-transparent cover plate 11 is set as an alumina ceramic plate. One side of the wave-transparent cover plate 11 is fixedly connected to the outer shell 5, and the other side of the wave-transparent cover plate 11 is fixedly connected to the wave-absorbing cone 4. The wave-transparent cover plate 11 allows electromagnetic waves that penetrate the wave-absorbing cone 4 to pass through and enter the phase-modulated corrugated plate 10, avoiding noise that interferes with the experiment due to reflection. Subsequently, the electromagnetic waves are modulated by the corrugated plate and then enter the lattice-like liner 9. Furthermore, the heat-conducting plate 8 and the lattice-like liner 9, as well as the lattice-like liner 9 and the phase-adjusting corrugated plate 10, are bonded together with high-temperature conductive adhesive. The high-temperature conductive adhesive can establish conductive paths between each layer through conductive particles, avoiding electromagnetic reflection between layers, ensuring that electromagnetic waves can continuously penetrate and be absorbed and lost layer by layer, and maintaining the overall shielding integrity of the entire shell. When this invention is used, when electromagnetic waves radiate into the shielding shell, the absorbing cone 4 first captures the broadband electromagnetic energy and converts most of it into heat energy. At this time, the low-frequency electromagnetic waves will penetrate the wave-transparent cover plate 11 and contact the phase-modulated corrugated plate 10. The phase-modulated corrugated plate 10 modulates the phase of the very low frequency to low frequency electromagnetic waves through its own geometric structure, changing the propagation path and reflection behavior of the electromagnetic waves, causing them to undergo destructive interference in the cavity, which greatly weakens the reflection intensity of this frequency band. These electromagnetic waves then enter the lattice-like liner 9 and are lost in the micro-hole structure through reflection and resonance, so that the remaining electromagnetic energy is converted into heat energy. The heat generated is conducted to the hot end of the thermoelectric generator 13 through the heat conduction plate 8. At the same time, the airflow generated by the ventilation system 2 flows through the ventilation slots 6 of the outer casing 5, effectively removing the heat from the heat dissipation fins 14. This establishes a continuous and stable temperature gradient between the cold and hot ends of the thermoelectric generator 13. This temperature gradient can support the thermoelectric generator 13 to continuously generate electricity based on the Seebeck effect. The generated electrical energy is collected and stored by the control box and provides fully self-sufficient power to the temperature sensor 7. This realizes the recovery and utilization of waste heat and provides a reliable physical quantity (temperature) for monitoring the health status of the shield. Under fixed test power and stable ventilation conditions, the performance of the absorbing material can be determined by analyzing the temperature sensor 7 reading through the existing program. If the reading is higher than the normal value, it indicates that the phase-controlled corrugated plate 10 or the lattice-like liner 9 has aging and loss. Based on this, the staff can carry out preventive maintenance before the shielding becomes abnormal, thus ensuring experimental safety.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. Electromagnetic shield housing of an electromagnetic shielded chamber, comprising an electromagnetic shielded chamber body (1), characterized in that, The upper side of the electromagnetic shielding chamber body (1) is provided with a ventilation system (2), the inner side wall of the electromagnetic shielding chamber body (1) is provided with a plurality of mounting racks (3) arranged in pairs, one electromagnetic shielding shell is fixed on each group of mounting racks (3), and the side of the electromagnetic shielding shell facing the inside of the electromagnetic shielding chamber body (1) is provided with a plurality of wave-absorbing cones (4). The electromagnetic shielding shell comprises a semi-open shell (5), the side of the shell (5) facing the mounting rack (3) is provided with a ventilation groove (6), the center of the shell (5) is provided with two mounting grooves, a thermoelectric power generation assembly and a temperature sensor (7) are respectively arranged in the two mounting grooves, the temperature sensor (7) is electrically connected with the thermoelectric power generation assembly, and the open side of the shell (5) is sequentially provided, from inside to outside, with a heat-conducting plate (8), a crystal lattice-like lining (9), a phase control corrugated plate (10) and a wave-transparent cover plate (11). The thermoelectric power generation assembly comprises a mounting plate (12), the side of the mounting plate (12) facing the shell (5) is provided with a thermoelectric generator (13), and the center of the side of the mounting plate (12) away from the thermoelectric generator (13) is provided with a control box and a heat dissipation fin (14).

2. The electromagnetically shielded enclosure of claim 1, wherein, The hot end of the thermoelectric generator (13) is in abutment with the heat-conducting plate (8), the cold end of the thermoelectric generator (13) is fixedly connected with the mounting plate (12), the heat dissipation fin (14) is arranged on both sides of the control box, the heat dissipation fin (14) is arranged perpendicular to the ground, and the control box is electrically connected with the temperature sensor (7).

3. The electromagnetically shielded enclosure of claim 1, wherein, The joint surface of the mounting plate (12) and the shell (5) is provided with an electromagnetic sealing gasket (15) made of conductive material.

4. The electromagnetically shielded enclosure of claim 1, wherein, The crystal lattice-like lining (9) is made of a metal additive process and comprises a micro rectangular frame (901) and an inner framework (902), the rectangular frame (901) and the inner framework (902) are both provided with a cylindrical outer wall, and the rectangular frame (901) and the inner framework (902) form a hole structure for promoting the loss of incident electromagnetic waves.

5. The electromagnetically shielded enclosure of claim 1, wherein, The phase control corrugated plate (10) is made of a polymer doped with magnetic fillers through a bending process, the corrugated shape of the phase control corrugated plate (10) is a continuous triangular prism, and the depth of the triangular groove between the corrugations of the phase control corrugated plate (10) is 25 mm.

6. The electromagnetically shielded enclosure of claim 1, wherein, The material of the wave-transparent cover plate (11) is an alumina ceramic plate, one side of the wave-transparent cover plate (11) is fixedly connected with the shell (5), and the other side of the wave-transparent cover plate (11) is fixedly connected with the wave-absorbing cone (4).

7. The electromagnetically shielded enclosure of claim 1, wherein, The heat-conducting plate (8) and the crystal lattice-like lining (9) and the crystal lattice-like lining (9) and the phase control corrugated plate (10) are adhesively connected through high-temperature conductive glue.

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