CN113607757A - Electromagnetic wave detection device for material detection - Google Patents

Electromagnetic wave detection device for material detection Download PDF

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Publication number
CN113607757A
CN113607757A CN202111113012.1A CN202111113012A CN113607757A CN 113607757 A CN113607757 A CN 113607757A CN 202111113012 A CN202111113012 A CN 202111113012A CN 113607757 A CN113607757 A CN 113607757A
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electromagnetic wave
detection
stainless steel
wave
electrons
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杨塞新
孙运斌
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Three Brothers Zhuhai Technology Co ltd
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Three Brothers Zhuhai Technology Co ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N22/00Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more

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Abstract

The invention discloses an electromagnetic wave detection device for material detection, which comprises a magnetron for emitting high-power microwaves, a first detection device, a reflected wave coupling device, a diffraction amplifier, an electronic sorting device, a receiving processor and a data processing unit, wherein the data processing unit is used for acquiring relevant information for identifying materials; the electromagnetic wave detection device provided by the invention is mainly used for detecting the reflected electromagnetic wave of the material irradiated by high-power microwave and detecting the quantum information emitted by the material after the material is subjected to quantization treatment, thereby providing scientific basis for the identification means of the material.

Description

Electromagnetic wave detection device for material detection
Technical Field
The application relates to the technical field of material detection, in particular to an electromagnetic wave detection device for material detection.
Background
Electromagnetic waves (Electromagnetic waves) are oscillating particle waves which are derived and emitted in space by electric fields and magnetic fields which are in the same phase and perpendicular to each other, are Electromagnetic fields which propagate in the form of waves and have particle duality, the particle morphology of the Electromagnetic waves is called photons, and the Electromagnetic waves and the photons are not in the relationship of black or white, but show two sides according to different practical researches. The electric field and the magnetic field which oscillate in phase and are perpendicular to each other move in space in the form of waves, and the propagation direction of the waves is perpendicular to the plane formed by the electric field and the magnetic field. The electromagnetic wave has a fixed speed in vacuum, and the speed is the speed of light.
The direction of the electric field, the direction of the magnetic field and the propagation direction of the electromagnetic wave are perpendicular to each other, so that the electromagnetic wave is a transverse wave. The electromagnetic wave is actually divided into an electric wave and a magnetic wave, which are generic terms of both, but since an electric field and a magnetic field always appear simultaneously, disappear simultaneously, and are converted into each other, both are generally called an electromagnetic wave, and may be simply called an electric wave in some cases.
Under quantum mechanics, the energy of an electromagnetic wave is represented as a quantum of photons, which are essentially wave packets, i.e., waves represented as a local quantity of energy. The energy of the electromagnetic wave is quantized, when the energy level step of the electromagnetic wave moves over a radiation critical point, the electromagnetic wave radiates outwards in the form of photons, the wave body at the phase is the photons, and the photons belong to bosons.
Electromagnetic waves of a certain frequency range can be seen by the human eye, called visible light, or simply light, and sunlight is a visible radiation form of electromagnetic waves. Electromagnetic waves do not rely on a medium for propagation.
Electromagnetic radiation is generally understood to mean electromagnetic waves of all electromagnetic radiation characteristics, and non-ionizing radiation is understood to mean radio waves, microwaves, infrared, visible light, ultraviolet light. Whereas X-rays and gamma-rays are generally considered radioactive radiation, called ionizing radiation.
At present, in the aspect of material identification, the material identification is mainly assisted by expert identification or a C14 detection instrument, the C14 detection instrument detects the material by detecting half-life data of radioactive isotopes such as C14, and the like, and the means can not meet the scientific, accurate and objective material detection target, so that a detection device for assisting the material detection by electromagnetic waves is urgently needed to meet the existing technical requirements.
Disclosure of Invention
In order to solve the problems of the prior art, the present invention provides an electromagnetic wave detection apparatus for material detection, including:
a magnetron for emitting high power microwaves;
a first detecting means for detecting a reflected wave of the high power microwave irradiated to the material;
a reflected wave coupling means for acquiring a reflected wave according to a first direction of the reflected wave detected by the first detection means and coupling the reflected wave into a vortex electron;
the diffraction amplifier is used for amplifying and diffusing the beam scale of the vortex electrons by diffracting the vortex electrons;
an electronic sorting device for separating the swirling electron beams having different momentums to different positions in space;
the receiving processor is used for receiving and processing the vortex electronic beams separated to different positions and acquiring waveform data corresponding to vortex electrons;
and the data processing unit is used for carrying out data processing on the waveform data and acquiring related information for identifying the material.
Preferably, the magnetron includes, in combination,
the horn antenna is arranged at the lower end of the magnetron;
the slow wave structure cavity is packaged at the upper end of the horn antenna, wherein the slow wave structure cavity is made of non-magnetic stainless steel materials;
the connection transition cavity is packaged at the upper end of the slow wave structure cavity;
the permanent magnet is nested on the outer cylinder of the magnetron between the slow wave structure cavity and the connection transition cavity;
the high-current diode is packaged at the upper end of the connecting transition cavity and used for generating high-power microwaves;
the gas trapping device is composed of a plurality of gas traps which are respectively packaged in the horn antenna, the slow wave structure cavity and the linking transition cavity, and is used for avoiding that the electron beams are different in collision degree in the motion process and influence the uniform emission of the electron beams.
Preferably, the horn antenna consists of a ceramic radiating surface and a nonmagnetic stainless steel horn which are packaged into a whole;
the gas trap is packaged on the nonmagnetic stainless steel horn.
Preferably, the permanent magnet comprises a first permanent magnet and a second permanent magnet which is not connected with the first permanent magnet;
the first permanent magnet is arranged at one end, close to the slow-wave structure cavity, between the slow-wave structure cavity and the connection transition cavity;
the second permanent magnet is arranged between the slow wave structure cavity and the connection transition cavity and close to one end of the connection transition cavity.
Preferably, the high-current diode consists of a ceramic vacuum interface, a non-magnetic stainless steel anode and a non-magnetic stainless steel hollow cathode rod;
the nonmagnetic stainless steel anode is packaged at the upper end of the connecting transition cavity, and a connecting hole for connecting the nonmagnetic stainless steel hollow cathode rod is formed in the center of the nonmagnetic stainless steel anode;
the outer part of one end of the non-magnetic stainless steel hollow cathode rod close to the connecting hole is connected with a ceramic vacuum interface;
the non-magnetic stainless steel hollow cathode rod is arranged on a central shaft in the magnetron.
Preferably, the nonmagnetic stainless steel hollow cathode rod is coaxially connected with the nonmagnetic stainless steel anode.
Preferably, the electromagnetic wave detection device further includes a second detection device provided in a second direction different from the first direction with respect to the first detection device, the second detection device having a plurality of detection elements that detect the reflected wave according to the irradiation position.
Preferably, the electromagnetic wave detection means further includes traveling wave control means for switching a reflection position of a reflected wave of the electromagnetic wave to the first detection means and/or the second detection means according to an irradiation position of the electromagnetic wave irradiated to the object and updating the related information;
the traveling wave control means is further adapted to transmit the updated related information to the reflected wave coupling means.
Preferably, the reflected wave coupling device comprises a high-voltage power supply, a high-speed electron gun, an electron cyclotron module and a coupler which are connected in sequence;
a high-speed electron gun for generating free electrons;
the high-voltage power supply is used for providing direct-current high voltage to accelerate the free electrons to form electrons moving at high speed;
the electron cyclotron module is used for converting electrons moving at high speed into high-speed cyclotron electrons;
and a coupler for coupling the reflected wave to the high-speed cyclotron electrons to form vortex electrons.
Preferably, the coupler further comprises a quantum coupler for coupling the quanta emitted by the material to the high-speed cyclotron;
and the data processing unit is used for carrying out data processing on the quantum information of the material and acquiring related information for identifying the material.
The invention discloses the following technical effects:
the electromagnetic wave detection device designed by the technical scheme provided by the invention is mainly used for detecting the reflected electromagnetic wave of the material irradiated by high-power microwave and detecting the quantum information emitted by the material after the material is subjected to quantization treatment, thereby providing scientific basis for the identification means of the material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic view of an apparatus according to the present invention;
FIG. 2 is a schematic view of a magnetron according to the present invention;
fig. 3 is a schematic diagram of a reflected wave coupling device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, 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, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
As shown in fig. 1 to 3, the present invention provides an electromagnetic wave detection apparatus for material detection, including:
a magnetron for emitting high power microwaves;
a first detecting means for detecting a reflected wave of the high power microwave irradiated to the material;
a reflected wave coupling means for acquiring a reflected wave according to a first direction of the reflected wave detected by the first detection means and coupling the reflected wave into a vortex electron;
the diffraction amplifier is used for amplifying and diffusing the beam scale of the vortex electrons by diffracting the vortex electrons;
an electronic sorting device for separating the swirling electron beams having different momentums to different positions in space;
the receiving processor is used for receiving and processing the vortex electronic beams separated to different positions and acquiring waveform data corresponding to vortex electrons;
and the data processing unit is used for carrying out data processing on the waveform data and acquiring related information for identifying the material.
The high-power microwave refers to an electromagnetic wave which is emitted directionally and has microwave pulse peak power of GW level and frequency of 1GHz to 300GHz, and has wide application requirements in various aspects such as directional energy weapons, plasma heating, high-energy radar, particle radio frequency acceleration, future space energy utilization and the like. The high power microwave source is the core of a high power microwave system for converting high power electrical pulses into radiation-capable high power microwave pulses.
Further, the magnetron includes,
the horn antenna is arranged at the lower end of the magnetron;
the slow wave structure cavity is packaged at the upper end of the horn antenna, wherein the slow wave structure cavity is made of non-magnetic stainless steel materials;
the connection transition cavity is packaged at the upper end of the slow wave structure cavity;
the permanent magnet is nested on the outer cylinder of the magnetron between the slow wave structure cavity and the connection transition cavity;
the high-current diode is packaged at the upper end of the connecting transition cavity and used for generating high-power microwaves;
the gas trapping device is composed of a plurality of gas traps which are respectively packaged in the horn antenna, the slow wave structure cavity and the linking transition cavity, and is used for avoiding that the electron beams are different in collision degree in the motion process and influence the uniform emission of the electron beams.
The magnetron provided by the application belongs to an integrated packaging structure, and under the excitation of 500kV of voltage, 10kA of current and 0.35T of permanent magnetic field on the high current diode provided by the invention, the average power of output microwave is 1.5GW, the efficiency reaches 40%, and the frequency is 2.1 GHz.
Furthermore, the horn antenna consists of a ceramic radiation surface and a non-magnetic stainless steel horn which are packaged into a whole;
the gas trap is packaged on the nonmagnetic stainless steel horn.
Further, the permanent magnet comprises a first permanent magnet and a second permanent magnet which is not connected with the first permanent magnet;
the first permanent magnet is arranged at one end, close to the slow-wave structure cavity, between the slow-wave structure cavity and the connection transition cavity;
the second permanent magnet is arranged between the slow wave structure cavity and the connection transition cavity and close to one end of the connection transition cavity.
Further, the high current diode consists of a ceramic vacuum interface, a nonmagnetic stainless steel anode and a nonmagnetic stainless steel hollow cathode rod;
the nonmagnetic stainless steel anode is packaged at the upper end of the connecting transition cavity, and a connecting hole for connecting the nonmagnetic stainless steel hollow cathode rod is formed in the center of the nonmagnetic stainless steel anode;
the outer part of one end of the non-magnetic stainless steel hollow cathode rod close to the connecting hole is connected with a ceramic vacuum interface;
the non-magnetic stainless steel hollow cathode rod is arranged on a central shaft in the magnetron.
Further, the non-magnetic stainless steel hollow cathode rod is coaxially connected with the non-magnetic stainless steel anode.
Further, the electromagnetic wave detection device further includes a second detection device provided in a second direction different from the first direction with respect to the first detection device, the second detection device having a plurality of detection elements that detect the reflected wave according to the irradiation position.
Further, the electromagnetic wave detection means further includes traveling wave control means for switching the reflection of the reflected wave of the electromagnetic wave to the reflection position of the first detection means and/or the second detection means in accordance with the irradiation position of the electromagnetic wave irradiated to the object, and updating the related information.
Furthermore, the reflected wave coupling device comprises a high-voltage power supply, a high-speed electron gun, an electron cyclotron module and a coupler which are connected in sequence;
a high-speed electron gun for generating free electrons;
the high-voltage power supply is used for providing direct-current high voltage to accelerate the free electrons to form electrons moving at high speed;
the electron cyclotron module is used for converting electrons moving at high speed into high-speed cyclotron electrons;
and a coupler for coupling the reflected wave to the high-speed cyclotron electrons to form vortex electrons.
Further, the coupler also comprises a quantum coupler, wherein the quantum coupler is used for coupling the quantum emitted by the material to the high-speed cyclotron;
and the data processing unit is used for carrying out data processing on the quantum information of the material and acquiring related information for identifying the material.
In the electromagnetic wave detection, the invention also comprises an electromagnetic wave sensor which is mainly used for detecting the polarization direction and the intensity, a carbon nano tube structure or a carbon nano tube composite structure is adopted as the electromagnetic wave sensor, the carbon nano tubes in the carbon nano tube structure or the carbon nano tube composite structure are orderly arranged, the conductivity is good, and the response speed of the electromagnetic wave detection device can be further improved; the carbon nanotube structure or the carbon nanotube composite structure can be self-supported, has better strength and stable structure, and improves the service life and the stability of the electromagnetic wave detection device; the carbon nanotubes or carbon nanotube lines in the carbon nanotube structure or the carbon nanotube composite structure of the electromagnetic wave sensor are arranged along the same direction, so that the electromagnetic wave detection device can measure not only the intensity of the electromagnetic wave, but also the polarization direction of the electromagnetic wave; the detection of the polarization direction of the electromagnetic wave signal only needs to rotate the carbon nanotube structure, so that the included angle between the length extension direction of the carbon nanotube in the carbon nanotube structure and the polarization direction of the electromagnetic wave is changed, and the method is simple:
the method comprises the following steps: an electromagnetic wave detection device is provided, which comprises an electromagnetic wave sensor, a first electrode, a second electrode and a measurement device, wherein the electromagnetic wave sensor comprises a carbon nanotube structure, the carbon nanotube structure comprises a plurality of carbon nanotubes, and the carbon nanotubes extend from the first electrode to the second electrode along the same direction.
The carbon nanotube structure comprises a plurality of carbon nanotubes, carbon nanotube linear structures or a combination thereof which are arranged in parallel along the same direction, namely, the length directions of the carbon nanotubes in the carbon nanotube structure are approximately the same, and the carbon nanotubes are basically parallel to the surface of the carbon nanotube structure.
Step two: and irradiating the electromagnetic wave sensor of the electromagnetic wave detection device with electromagnetic waves with the polarization direction to be detected, so as to cause the resistance of the carbon nano tube structure to change.
The electromagnetic wave with the polarization direction to be measured is vertically incident to the surface of the carbon nanotube structure, when the polarization direction of the electromagnetic wave is parallel to the length direction of the carbon nanotube, the carbon nanotube structure absorbs the electromagnetic wave most strongly, when the polarization direction of the electromagnetic wave is perpendicular to the length direction of the carbon nanotube, the carbon nanotube structure absorbs the electromagnetic wave most weakly, and the difference of the absorption strength of the carbon nanotube structure on the electromagnetic wave can cause the difference of the resistance change of the carbon nanotube structure. It can be seen that when the included angle between the polarization direction of the electromagnetic wave and the length direction of the carbon nanotube in the carbon nanotube structure is changed, the resistance of the carbon nanotube structure is also changed correspondingly.
Step three: rotating the electromagnetic wave sensor of the electromagnetic wave detection device to change the included angle between the length direction of the carbon nano tube in the carbon nano tube structure and the polarization direction of the electromagnetic wave, measuring the resistance of the carbon nano tube structure in the change process, and judging the polarization direction of the electromagnetic wave to be detected according to the change of the measured resistance.
The electromagnetic wave detection device and the electromagnetic wave detection method provided by the invention have the following advantages: because the electromagnetic wave sensor of the electromagnetic wave detection device comprises the carbon nano tube structure, the carbon nano tube structure comprises a plurality of carbon nano tubes extending along a fixed direction, and the included angle between the length extending direction of the carbon nano tubes in the carbon nano tube structure and the polarization direction of the electromagnetic wave is changed by rotating the carbon nano tube structure, so that the polarization direction of the electromagnetic wave can be detected.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the present invention in its spirit and scope. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An electromagnetic wave detection apparatus for material detection, characterized by comprising:
a magnetron for emitting high power microwaves;
a first detecting means for detecting a reflected wave of the high power microwave irradiated to the material;
a reflected wave coupling means for acquiring the reflected wave according to a first direction of the reflected wave detected by the first detection means and coupling the reflected wave into a vortex electron;
the diffraction amplifier is used for amplifying and diffusing the beam scale of the vortex electrons by diffracting the vortex electrons;
an electronic sorting device for separating the swirling electron beams having different momentums to different positions in space;
the receiving processor is used for receiving and processing the vortex electronic beams separated to different positions to obtain waveform data corresponding to the vortex electrons;
and the data processing unit is used for carrying out data processing on the waveform data to acquire relevant information for identifying the material.
2. An electromagnetic wave detection apparatus for material detection as set forth in claim 1, characterized in that:
the magnetron comprises a magnetron body and a magnetron body,
the horn antenna is arranged at the lower end of the magnetron;
the slow wave structure cavity is packaged at the upper end of the horn antenna, and is made of non-magnetic stainless steel materials;
the connection transition cavity is packaged at the upper end of the slow wave structure cavity;
the permanent magnet is nested on the outer cylinder of the magnetron between the slow wave structure cavity and the linking transition cavity;
the high-current diode is packaged at the upper end of the connecting transition cavity and used for generating the high-power microwave;
and the gas trapping device consists of a plurality of gas traps which are respectively packaged in the horn antenna, the slow-wave structure cavity and the connection transition cavity and is used for preventing the electron beams from being affected by different collision degrees in the movement process and influencing the uniform emission of the electron beams.
3. An electromagnetic wave detection apparatus for material detection as set forth in claim 2, characterized in that:
the horn antenna consists of a ceramic radiation surface and a non-magnetic stainless steel horn which are packaged into a whole;
the gas trap is packaged on the nonmagnetic stainless steel horn.
4. An electromagnetic wave detection apparatus for material detection as set forth in claim 3, characterized in that:
the permanent magnet comprises a first permanent magnet and a second permanent magnet which is not connected with the first permanent magnet;
the first permanent magnet is arranged at one end, close to the slow wave structure cavity, between the slow wave structure cavity and the linking transition cavity;
the second permanent magnet is arranged between the slow wave structure cavity and the connection transition cavity and close to one end of the connection transition cavity.
5. An electromagnetic wave detection apparatus for material detection as set forth in claim 4, characterized in that:
the high-current diode consists of a ceramic vacuum interface, a non-magnetic stainless steel anode and a non-magnetic stainless steel hollow cathode rod;
the nonmagnetic stainless steel anode is packaged at the upper end of the linking transition cavity, and a connecting hole for connecting the nonmagnetic stainless steel hollow cathode rod is formed in the center of the nonmagnetic stainless steel anode;
the ceramic vacuum interface is connected to the outer part of one end, close to the connecting hole, of the non-magnetic stainless steel hollow cathode rod;
the non-magnetic stainless steel hollow cathode rod is arranged on a central shaft in the magnetron.
6. An electromagnetic wave detection apparatus for material detection as set forth in claim 5, characterized in that:
the non-magnetic stainless steel hollow cathode rod is coaxially connected with the non-magnetic stainless steel anode.
7. An electromagnetic wave detection apparatus for material detection as set forth in claim 1, characterized in that:
the electromagnetic wave detection device further includes a second detection device provided in a second direction different from the first direction with respect to the first detection device, the second detection device having a plurality of detection elements that detect the reflected wave according to an irradiation position.
8. An electromagnetic wave detection apparatus for material detection as set forth in claim 7, characterized in that:
the electromagnetic wave detection means further includes traveling wave control means for switching a reflection position of a reflected wave of the electromagnetic wave to the first detection means and/or the second detection means in accordance with an irradiation position of the electromagnetic wave irradiated to the material, and updating the relevant information;
the traveling wave control means is further configured to transmit the updated related information to the reflected wave coupling means.
9. An electromagnetic wave detection apparatus for material detection as set forth in claim 7, characterized in that:
the reflected wave coupling device comprises a high-voltage power supply, a high-speed electron gun, an electron cyclotron module and a coupler which are sequentially connected;
the high-speed electron gun is used for generating free electrons;
the high-voltage power supply is used for providing direct-current high voltage to accelerate the free electrons to form electrons moving at high speed;
the electron cyclotron module is used for converting the electrons moving at high speed into high-speed cyclotron electrons;
the coupler is used for coupling the reflected wave to the high-speed cyclotron electrons to form the vortex electrons.
10. An electromagnetic wave detection apparatus for material detection as set forth in claim 9, characterized in that:
the coupler further comprises a quantum coupler for coupling quanta emitted by the material to the high-speed cyclotron;
and the data processing unit is used for carrying out data processing on the quantum information of the material and acquiring related information for identifying the material.
CN202111113012.1A 2021-09-18 2021-09-18 Electromagnetic wave detection device for material detection Pending CN113607757A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005233783A (en) * 2004-02-19 2005-09-02 Shogo Tanaka Position telemetering method using electromagnetic-wave radar
EP2031375A2 (en) * 2007-08-31 2009-03-04 Canon Kabushiki Kaisha Inspection apparatus and inspection method using terahertz waves
CN110476076A (en) * 2017-03-24 2019-11-19 京瓷株式会社 Electromagnetic wave detection device, program and electromagnetic wave detecting system
CN111130612A (en) * 2019-12-24 2020-05-08 清华大学 Electromagnetic wave quantum state orbital angular momentum communication system and method
CN112151342A (en) * 2020-10-12 2020-12-29 中国人民解放军国防科技大学 Magnetron based on gigawatt high-power microwave source hard tube and permanent magnet package

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005233783A (en) * 2004-02-19 2005-09-02 Shogo Tanaka Position telemetering method using electromagnetic-wave radar
EP2031375A2 (en) * 2007-08-31 2009-03-04 Canon Kabushiki Kaisha Inspection apparatus and inspection method using terahertz waves
CN110476076A (en) * 2017-03-24 2019-11-19 京瓷株式会社 Electromagnetic wave detection device, program and electromagnetic wave detecting system
CN111130612A (en) * 2019-12-24 2020-05-08 清华大学 Electromagnetic wave quantum state orbital angular momentum communication system and method
CN112151342A (en) * 2020-10-12 2020-12-29 中国人民解放军国防科技大学 Magnetron based on gigawatt high-power microwave source hard tube and permanent magnet package

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