Millimeter wave electromagnetic radiation measurement system and method

Abstract

The application discloses a millimeter wave electromagnetic radiation measurement system and method, and the system comprises an anechoic chamber, a controller, a high-power millimeter wave generator, a rectangular waveguide, an equivalent skin model, a measured antenna and an infrared camera; the rectangular waveguide, the equivalent skin model, the measured antenna and the infrared camera are located in the anechoic chamber; the infrared camera is located above the equivalent skin model and opposite to the measured antenna; the high-power millimeter wave generator is used for generating a continuous electromagnetic wave signal with power and frequency controlled by the controller; the rectangular waveguide is used for transmitting the electromagnetic wave signal to the measured antenna and preventing the electromagnetic wave signal from leaking out; the measured antenna is used for irradiating the electromagnetic wave signal onto the equivalent skin model; and the infrared camera is used for recording a heating mode dynamic image of the upper surface of the equivalent skin model, and the heating mode dynamic image is used for determining a power density PD distribution on the equivalent skin model and reproducing a reflection coefficient of human skin. The application can realize rapid measurement.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, and in particular to a millimeter-wave electromagnetic radiation measurement system and method. Background Technology

[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.

[0003] The growing demand for network capacity and high data rates has fueled interest in millimeter-wave wireless applications. In particular, the 60 GHz band has been identified as a very promising band. Wireless devices operating in this band will benefit from higher data rates, greater bandwidth, secure communication, and a compact size.

[0004] Traditional near-field measurements in millimeter-wave environments utilize probe scanning systems, which include a scanning stage, a guide rail (for moving the near-field probe), the near-field probe, the antenna under test (AUT), and a scanning control motor. During testing, the object under test (AUT) is placed on the scanning stage, and the probe, perpendicular to the plane formed by the AUT, moves along the guide rail to scan. The scanning resolution is adjusted by varying the travel distance and the number of test points. However, this requires a long acquisition time and a relatively large separation distance between the AUT and the acquisition probe to mitigate interference. Summary of the Invention

[0005] This invention provides a millimeter-wave electromagnetic radiation measurement system, comprising: An anechoic chamber, a controller, a high-power millimeter-wave generator, a rectangular waveguide, an equivalent skin phantom, an antenna under test, and an infrared camera are located within the anechoic chamber; the infrared camera is located above the equivalent skin phantom and opposite the antenna under test. High-power millimeter-wave generators are used to generate continuous electromagnetic wave signals, wherein the power and frequency of the electromagnetic wave signals are controlled by a controller. Rectangular waveguides are used to transmit electromagnetic wave signals to the antenna under test and to prevent electromagnetic wave signals from leaking out. The antenna under test is used to: irradiate electromagnetic wave signals onto an equivalent skin phantom; The infrared camera is used to record dynamic images of the heating pattern on the upper surface of an equivalent skin phantom, which are used to determine the power density (PD) distribution on the equivalent skin phantom and reproduce the reflectance coefficient of human skin.

[0006] This invention also provides a method for measuring millimeter-wave electromagnetic radiation, comprising: A high-power millimeter-wave generator produces continuous electromagnetic wave signals, the power and frequency of which are controlled by a controller. A rectangular waveguide transmits electromagnetic wave signals to the antenna under test, preventing electromagnetic wave signals from leaking outwards. The antenna under test irradiates electromagnetic wave signals onto the equivalent skin phantom; An infrared camera records dynamic images of the heating pattern on the upper surface of an equivalent skin phantom. These dynamic images are used to determine the power density (PD) distribution on the equivalent skin phantom and reproduce the reflectance coefficient of human skin. The rectangular waveguide, equivalent skin phantom, antenna under test, and infrared camera are located in the anechoic chamber; the infrared camera is located above the equivalent skin phantom and opposite the antenna under test.

[0007] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described millimeter-wave electromagnetic radiation measurement method.

[0008] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described millimeter-wave electromagnetic radiation measurement method.

[0009] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described millimeter-wave electromagnetic radiation measurement method.

[0010] This invention proposes a millimeter-wave (mmW) antenna / human body coupled near-field power density (PD) measurement technique. The proposed method employs a specially designed structure to reproduce the reflectance of human skin. This optimized structure converts the absorbed power density into an infrared (IR) spectrum, which is remotely recorded using a high-resolution IR camera to reconstruct the PD distribution. Compared to standard electromagnetic (EM) probes, the broadband, isotropic, and polarization-insensitive infrared (IR) probe allows for rapid (typically within seconds) remote measurements with high spatial resolution (sub-millimeter)—something electromagnetic probes cannot achieve. Existing measurement systems generally employ electromagnetic probes and electromagnetic near-field scanning systems. This invention, for the first time, introduces a specially designed solid-loss skin equivalent structure for visualization and measurement of the heating patterns of the reconstructed PD profile through remote infrared imaging. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of a millimeter-wave electromagnetic radiation measurement system in an embodiment of the present invention; Figure 2 This is a schematic diagram of the amplitude reflection coefficient of the skin equivalent phantom in the vertical incidence range of 56.5 GHz to 67 GHz in an embodiment of the present invention; wherein, the complex dielectric constant CDPMS of the phantom is shown as solid line and the skin as dashed line; Figure 3 This is a schematic diagram of the amplitude reflection coefficient of the skin equivalent phantom at 60 GHz under parallel polarization (TM) incident light in an embodiment of the present invention; wherein, the complex dielectric constant CDPMS of the phantom is shown as solid line and the skin as dashed line; Figure 4 This is a schematic diagram of the amplitude reflection coefficient of the skin equivalent phantom at 60 GHz with vertical polarization (TE) incident light in an embodiment of the present invention; wherein, the complex dielectric constant CDPMS of the phantom is represented by solid line and the skin by dashed line; Figure 5 The diagram above shows different controlled antenna AUTs in the embodiments of the present invention, and the diagram below shows their positioning relative to the model. Figures 6-9 As described in the embodiments of the present invention = 6.5 mm patch array antenna and A schematic diagram of the measurement results for a 3.0 mm conical horn antenna. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0013] To address the problems existing in current technologies, this invention proposes a millimeter-wave electromagnetic radiation measurement system that considers the changes in antenna radiation caused by antenna / human body interaction. To this end, we use a high-resolution infrared camera and a specially designed thin-plane skin equivalent structure to simulate the reflection coefficient of the air / skin interface. Figure 1As shown, the system includes: an anechoic chamber 1, a controller 2, a high-power millimeter-wave generator 3, a rectangular waveguide 4, an equivalent skin phantom 5, an antenna under test 6, and an infrared camera 7; the rectangular waveguide, the equivalent skin phantom, the antenna under test, and the infrared camera are located inside the anechoic chamber; the infrared camera is located above the equivalent skin phantom and opposite the antenna under test. High-power millimeter-wave generators are used to generate continuous electromagnetic wave signals, wherein the power and frequency of the electromagnetic wave signals are controlled by a controller. Rectangular waveguides are used to transmit electromagnetic wave signals to the antenna under test and to prevent electromagnetic wave signals from leaking out. The antenna under test is used to: irradiate electromagnetic wave signals onto an equivalent skin phantom; The infrared camera is used to record dynamic images of the heating pattern on the upper surface of an equivalent skin phantom, which are used to determine the power density (PD) distribution on the equivalent skin phantom and reproduce the reflectance coefficient of human skin.

[0014] In addition, such as Figure 1 As shown, the anechoic chamber in this system is covered with a wave-absorbing material 8, which absorbs or significantly reduces the electromagnetic wave energy received on its surface, thereby reducing electromagnetic wave interference.

[0015] like Figure 1 As shown, the system also includes a bracket 9 for mounting an infrared camera.

[0016] like Figure 1 As shown, the system also includes a phantom support 10 for placing an equivalent skin phantom.

[0017] In one embodiment, a high-power millimeter-wave generator is used to generate a 60 GHz continuous wave signal, with power and frequency controlled by controller 2 (i.e., a programmable power supply (Rohde & Schwarz)).

[0018] In one embodiment, a rectangular waveguide is used to transmit electromagnetic signals to the antenna under test (AUT) and prevent electromagnetic waves from leaking outwards. The rectangular waveguide used is a WR-15 rectangular waveguide.

[0019] Rectangular waveguides: Typically made of metallic materials (copper, aluminum, etc.), regular metallic waveguides with rectangular cross-sections and filled with air are called rectangular waveguides. There is no internal conductor within the waveguide, resulting in low loss and high power capacity. Electromagnetic energy is guided and propagated within the waveguide's internal space, preventing electromagnetic wave leakage to the outside. Rectangular waveguides can only transmit TE or TM waves.

[0020] Any device capable of guiding the directional transmission of electromagnetic waves is collectively called a waveguide system, and the electromagnetic waves guided for directional transmission are called guided electromagnetic waves, or simply waveguides. Waveguide systems are also known as transmission lines. In a practical radio frequency or microwave system, the transmission line is the most basic component. It not only serves to connect signals, but the transmission line itself can also constitute certain components, such as capacitors, inductors, transformers, resonant circuits, filters, and antennas.

[0021] In one embodiment, an infrared camera (FLIR Systems, Wilsonville, Oregon, USA) with a thermal sensitivity of 18 mK and a spatial resolution of 640 × 512 pixels (X6540sc) was used to record the dynamic heating patterns of the upper surface of the equivalent skin phantom. The infrared camera was positioned opposite the AUT, 15 cm away from the equivalent skin phantom. A sequence of thermal images was recorded at a sampling rate of 50 frames per second.

[0022] For short exposure duration (in, = 3 seconds), the heating pattern on the equivalent skin phantom (t) represents the PD distribution (for = 3 seconds, with theoretical correlation and maximum relative error within 99.8% and 3.27% respectively), for plane wave exposure, the relationship is as follows: High spatial resolution .

[0023] in, , σ and These are the phantom's heat capacity, mass density, electrical conductivity, and complex impedance.

[0024] In one embodiment, to accurately reproduce the antenna / human interaction, the lossy structure used to convert electromagnetic energy into heat should have the same power reflection coefficient as human skin. The equivalent skin phantom should be as thin as possible to maximize the temperature rise of its upper part through transmission through the phantom. Furthermore, the loss in the equivalent skin phantom should be high enough to ensure measurable temperatures (higher loss results in a higher SNR for the recorded heat distribution). Finally, since the temperature is recorded on the upper side of the model, the PD distributions on both sides should be as close as possible. Under these conditions, the PD distribution can be obtained by measuring the heating pattern on the upper surface of the equivalent skin phantom.

[0025] To meet these standards, a planar phantom was designed, optimized, and fabricated using carbon black powder and PDMS (low-loss dielectric). Specifically, PDMS (obtained by mixing silicone gel and a curing agent) was thoroughly mixed with carbon powder, then degassed under vacuum, and finally dried in an oven at 110°C for two hours. The carbon concentration and equivalent skin phantom thickness were optimized to achieve a reflectance close to the air / skin interface and sufficient transmittance, thereby ensuring similar PD distribution on both sides in the 56.5–67 GHz range. Figure 2 The optimal values ​​are 40% and 2.5 mm, respectively. Note that increasing the carbon concentration beyond these values ​​complicates model fabrication and reduces its uniformity. The model should be large enough to encompass the entire field of view (i.e., half-power bandwidth) and to avoid surface waves near the model boundaries. Therefore, a 100 mm × 100 mm phantom was used.

[0026] The complex permittivity (CPDMS) of the equivalent skin phantom was measured at 60 GHz using a free-space propagation method. It was found to be equal to... =11.64-2.91 The reflection coefficient was calculated using Fresnel coefficient analysis, and numerical calculations were performed using a frequency domain solver. Figure 3 and Figure 4 When the incident angle is < 50°, the difference in reflectance between dry skin and the CPDMS phantom is within 10%. Figure 3 For a phantom diameter of 100 mm, this limitation in angular range allows for measurements from an omnidirectional source to the phantom. = 42mm. For directional antennas, this distance is extended (e.g., for 2×2 patch arrays and conical horn antennas, it is extended to 120 mm and 365 mm, respectively).

[0027] In one embodiment, such as Figure 5 As shown, the antenna under test 6 can be a 2×2 patch antenna array 61, connected to the rectangular waveguide 4 using an antenna connector 65 and a waveguide-coaxial adapter 62. Alternatively, the antenna under test can be a V-band linearly polarized conical horn antenna 63, connected to the rectangular waveguide 4 using a rectangular-to-circular converter 64.

[0028] The input power of the antenna under test (AUT) is 3156 mW. Note that in the proposed technique, the power level should be high enough to obtain a high signal-to-noise ratio (SNR) and sufficient infrared image contrast. To achieve an SNR greater than 10 dB after a 10-second exposure, the input power for the quaternary patch array and the conical horn antenna is... d = At least 880mW and 423mW at 2mm, d= At least 2365mW and 1443mW for a 10mm model. Note that the minimum input power required also depends on the model thickness (generally, for a given model material, a thicker model requires a higher minimum power).

[0029] The numerical simulation will now be performed.

[0030] The measured temperature distributions were compared with numerical results calculated using the Finite Integral Technique (FIT). Open boundaries were used to represent free-space conditions. The total number of grid cells reached approximately 29 million for the patch array and 160 million for the conical horn antenna. Convergence was achieved by setting the grid cell size in the model to 70 micrometers and the grid cell size in the surrounding free space to 200 micrometers. A high-performance workstation with accelerators (Xeon Gold 6140, 768Go RAM, NVIDIA Quadro GV100) was used for computation. The typical simulation durations were approximately 36 minutes for the patch array and 263 minutes for the conical horn antenna.

[0031] (1) Experimental verification at 60 GHz

[0032] Two representative AUTs were used: (1) a 2×2 patch antenna array with a gain of 11.9 dBi, matched to 50 Ω at 60 GHz; and (2) a V-band linearly polarized conical horn antenna with a gain of 21.4 dBi. Figure 5 The waveguide-to-coaxial adapter and the rectangular-to-circular converter were used to connect to the feed rectangular waveguide, respectively. To compare the simulated and measured partial discharge distributions, a correlation coefficient r was used, defined as:

[0033] in, and These are the measured distribution and the simulated distribution, respectively. and They are and The average value. The parameter r is an indicator of how well the two relative distributions fit.

[0034] in, Figure 5 The top left image is a schematic diagram of the patch antenna array, and the bottom left image is a schematic diagram of the positioning and connection relative to the model. Figure 5 The top right image is a schematic diagram of the conical horn, and the bottom right image is a schematic diagram of its positioning and connection relative to the model. All dimensions are in millimeters.

[0035] The PD distributions calculated and measured by the two AUTs are as follows: Figures 6 to 9 As shown.

[0036] like Figure 6 As shown, for a patch antenna array at d = 6.5 mm, the measured distribution (left figure) and simulated distribution (right figure) of its power density distribution have a correlation of 99.4% between the numerical (simulated) distribution and the experimental (measured) distribution.

[0037] like Figure 7 The power density distribution of a patch array antenna with d = 6.5 mm is shown in the figure: one-dimensional simulation (dashed curve) and actual measurement (solid curve) along the x-axis (y = 0 mm) (left figure) and y-axis (x = 0 mm) (right figure).

[0038] like Figure 8 As shown, for a conical horn antenna at d = 3.0 mm, the measured distribution (left figure) and simulated distribution (right figure) of its power density distribution have a correlation of 98% between the numerical (simulated) distribution and the experimental (measured) distribution.

[0039] like Figure 9 As shown, the power density distribution of a conical horn antenna with d = 3.0 mm: one-dimensional simulation (dashed curve) and measured (solid curve) along the x-axis (y = 0 mm) (left) and y-axis (x = 0 mm) (right).

[0040] For the main lobe, very good agreement was observed between the numerical and experimental results. Figures 6 to 9 The difference between the simulated and measured sidelobes is attributed to thermal noise (noise level equal to –13.6 dB). This difference is primarily due to thermal diffusion and the low SNR of the sidelobes, and can be reduced by increasing power (thus improving SNR) or addressing the reverse heat conduction problem.

[0041] In summary, this invention proposes a millimeter-wave (mmW) antenna / human body coupled near-field power density (PD) measurement technique. The proposed method employs a specially designed structure to reproduce the reflectance of human skin. This optimized structure converts the absorbed power density into an infrared (IR) spectrum, which is then remotely recorded using a high-resolution IR camera to reconstruct the PD distribution. Compared to standard electromagnetic (EM) probes, the broadband, isotropic, and polarization-insensitive infrared (IR) probe allows for rapid (typically within seconds) remote measurements with high spatial resolution (sub-millimeter)—something electromagnetic probes cannot achieve. Existing measurement systems generally employ electromagnetic probes and electromagnetic near-field scanning systems. This invention, for the first time, introduces a specially designed solid-loss skin equivalent structure for visualization and measurement of the heating patterns of the reconstructed PD profile through remote infrared imaging.

[0042] As a validation example, numerical and experimental PD distributions for a 4-element patch antenna array and a linearly polarized conical horn antenna were compared at 60 GHz. The simulated and measured results for the main lobe were in excellent agreement (correlation > 98%). This proof-of-concept study demonstrates the great potential of this technique for rapid, long-range, high-resolution PD measurements. For example, it can be used to characterize near-field radiation patterns or antenna performance in the presence of a human body. Further improvements to sidelobe measurements using advanced infrared thermal imaging and post-processing schemes constitute one of the prospects of this study. Furthermore, understanding the thermal characteristics of the model can be used to retrieve the absolute value of the PD.

[0043] "The acquisition, storage, use, and processing of data in this application's technical solution all comply with the relevant provisions of national laws and regulations."

[0044] This invention also provides a millimeter-wave electromagnetic radiation measurement method, as described in the following embodiments. Since the principle behind this millimeter-wave electromagnetic radiation measurement method is similar to that of the millimeter-wave electromagnetic radiation measurement system, the implementation of this method can be found in the implementation of the millimeter-wave electromagnetic radiation measurement system; repeated details will not be elaborated further.

[0045] The millimeter-wave electromagnetic radiation measurement method proposed in this invention includes: A high-power millimeter-wave generator produces continuous electromagnetic wave signals, the power and frequency of which are controlled by a controller. A rectangular waveguide transmits electromagnetic wave signals to the antenna under test, preventing electromagnetic wave signals from leaking outwards. The antenna under test irradiates electromagnetic wave signals onto the equivalent skin phantom; An infrared camera records dynamic images of the heating pattern on the upper surface of an equivalent skin phantom. These dynamic images are used to determine the power density (PD) distribution on the equivalent skin phantom and reproduce the reflectance coefficient of human skin. The rectangular waveguide, equivalent skin phantom, antenna under test, and infrared camera are located in the anechoic chamber; the infrared camera is located above the equivalent skin phantom and opposite the antenna under test.

[0046] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described millimeter-wave electromagnetic radiation measurement method.

[0047] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described millimeter-wave electromagnetic radiation measurement method.

[0048] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described millimeter-wave electromagnetic radiation measurement method.

[0049] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0050] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0051] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0052] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0053] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A millimeter wave electromagnetic radiation measurement system, characterized by, include: An anechoic chamber, a controller, a high-power millimeter-wave generator, a rectangular waveguide, an equivalent skin phantom, an antenna under test, and an infrared camera are located within the anechoic chamber; the infrared camera is located above the equivalent skin phantom and opposite the antenna under test. High-power millimeter-wave generators are used to generate continuous electromagnetic wave signals, wherein the power and frequency of the electromagnetic wave signals are controlled by a controller. Rectangular waveguides are used to transmit electromagnetic wave signals to the antenna under test and to prevent electromagnetic wave signals from leaking out. The antenna under test is used to: irradiate electromagnetic wave signals onto an equivalent skin phantom; The infrared camera is used to record dynamic images of the heating pattern on the upper surface of an equivalent skin phantom, the dynamic images of the heating pattern being used to determine the power density (PD) distribution on the equivalent skin phantom and reproduce the reflectance coefficient of human skin. Specifically, a planar phantom was designed, optimized, and fabricated using carbon black powder and a low-loss dielectric. The low-loss dielectric was obtained by mixing silicone gel and a curing agent. The low-loss dielectric was thoroughly mixed with carbon powder, degassed under vacuum, and dried in an oven at 110°C for two hours. The carbon concentration and equivalent skin phantom thickness were optimized to obtain a reflectivity close to that at the air or skin interface and sufficient transmittance, with similar PD distribution on both sides in the 56.5-67 GHz range.

2. The millimeter-wave electromagnetic radiation measurement system of claim 1, wherein, The antenna under test is a 2×2 patch antenna array, which is connected to a rectangular waveguide using a waveguide-coaxial adapter.

3. The millimeter-wave electromagnetic radiation measurement system of claim 1, wherein, The antenna under test is a V-band linearly polarized conical horn antenna, connected to a rectangular waveguide using a rectangular-to-circular converter.

4. The millimeter-wave electromagnetic radiation measurement system as described in claim 1, characterized in that, The controller uses a programmable power supply.

5. The millimeter-wave electromagnetic radiation measurement system as described in claim 1, characterized in that, The electromagnetic wave signal is a continuous electromagnetic wave signal of 60 GHz.

6. The millimeter-wave electromagnetic radiation measurement system as described in claim 1, characterized in that, The rectangular waveguide is a WR-15 rectangular waveguide.

7. The millimeter-wave electromagnetic radiation measurement system as described in claim 1, characterized in that, The anechoic chamber is covered with a wave-absorbing material.

8. The millimeter-wave electromagnetic radiation measurement system as described in claim 1, characterized in that, Also includes: A bracket for mounting an infrared camera.

9. The millimeter-wave electromagnetic radiation measurement system as described in claim 1, characterized in that, Also includes: The phantom support is used to hold the equivalent skin phantom.

10. A method for measuring millimeter-wave electromagnetic radiation, characterized in that, include: A high-power millimeter-wave generator produces continuous electromagnetic wave signals, the power and frequency of which are controlled by a controller. A rectangular waveguide transmits electromagnetic wave signals to the antenna under test, preventing electromagnetic wave signals from leaking outwards. The antenna under test irradiates electromagnetic wave signals onto the equivalent skin phantom; An infrared camera records dynamic images of the heating pattern on the upper surface of an equivalent skin phantom. These dynamic images are used to determine the power density (PD) distribution on the equivalent skin phantom and reproduce the reflectance coefficient of human skin. The rectangular waveguide, equivalent skin phantom, antenna under test, and infrared camera are located in the anechoic chamber; the infrared camera is located above the equivalent skin phantom and opposite the antenna under test. Specifically, a planar phantom was designed, optimized, and fabricated using carbon black powder and a low-loss dielectric. The low-loss dielectric was obtained by mixing silicone gel and a curing agent. The low-loss dielectric was thoroughly mixed with carbon powder, degassed under vacuum, and dried in an oven at 110°C for two hours. The carbon concentration and equivalent skin phantom thickness were optimized to obtain a reflectivity close to that at the air or skin interface and sufficient transmittance, with similar PD distribution on both sides in the 56.5-67 GHz range.

Images