CN211979054U - Device for detecting millimeter wave power density on surface of millimeter wave equipment - Google Patents
Device for detecting millimeter wave power density on surface of millimeter wave equipment Download PDFInfo
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- CN211979054U CN211979054U CN201922478660.1U CN201922478660U CN211979054U CN 211979054 U CN211979054 U CN 211979054U CN 201922478660 U CN201922478660 U CN 201922478660U CN 211979054 U CN211979054 U CN 211979054U
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- millimeter wave
- microwave
- closed cavity
- power density
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Abstract
The utility model discloses a detect device of millimeter wave equipment surface millimeter wave power density, including airtight chamber, horn antenna, radio frequency cable, frequency spectrograph. The utility model discloses utilized certain molecule (like monoterpene gas) that has characteristic rotation spectrum at microwave or millimeter wave band to receive the characteristic that can radiate the microwave after the millimeter wave arouses, be full of monoterpene gas in a microminiature airtight intracavity to millimeter wave and microwave equal transparent, then let this airtight chamber scan on millimeter wave equipment surface, receive with horn antenna and spectrometer simultaneously, detect and record monoterpene gas and receive the microwave fingerprint power spectrum that the millimeter wave arouses the back radiation. And calculating the millimeter wave power density on the surface of the equipment according to the intensity of the microwave fingerprint power spectrum. The utility model has the characteristics of easy operation, short-term test and with low costs.
Description
Technical Field
The utility model relates to a detect device of millimeter wave equipment surface millimeter wave power density.
Background
With the development of millimeter wave technology and 5G mobile communication technology, more and more millimeter wave devices will appear around people, such as millimeter wave positioning radar, 5G millimeter wave mobile phones, millimeter wave communication base stations, and the like. However, excessive millimeter wave radiation may cause certain harm to human body, and therefore there are international standards that require that the power density of millimeter wave equipment cannot exceed the standard value. At present, on one hand, the manufacturing cost of millimeter wave measuring equipment is very expensive, and on the other hand, the time consumption of the traditional method for performing near-field scanning by adopting a probe is very long, so that the requirement on a millimeter wave equipment production line is difficult to meet.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a device for detecting millimeter wave power density on the surface of millimeter wave equipment, which utilizes the response characteristic of certain molecules (such as monoterpene or volatile oil gas) with characteristic rotation spectrum in microwave or millimeter wave bands to millimeter waves to detect the millimeter wave power density on the surface of the millimeter wave equipment.
A device for detecting millimeter wave power density on the surface of millimeter wave equipment comprises a sealed cavity, a horn antenna, a radio frequency cable and a frequency spectrograph; the closed cavity is arranged on the surface of the millimeter wave equipment to be detected or is at a certain distance away, millimeter wave induction substances are contained in the closed cavity, and the horn antenna is aligned to the closed cavity and is connected to the frequency spectrograph through a radio frequency cable.
The closed cavity is a cube or a sphere, and the surface area of the closed cavity is less than one tenth of that of the millimeter wave equipment to be detected.
The closed cavity or the millimeter wave equipment to be detected can perform relative displacement, so that the closed cavity scans the whole or partial surface of the millimeter wave equipment to be detected.
The utility model has the advantages that:
the millimeter wave power density of the position of the micro-closed cavity can be detected and recorded in real time, and the method has the characteristics of low equipment cost, high detection speed and the like.
Drawings
FIG. 1 is a schematic diagram of a closed cavity scanning on the surface of a 5G millimeter wave mobile phone;
FIG. 2 is a schematic structural diagram of an apparatus for detecting millimeter wave power density on a surface of a millimeter wave device;
in the figure, the device comprises a 5G millimeter wave mobile phone 1, a closed cavity 2, monoterpene gas 3, a scanning track 4, a horn antenna 5, a radio frequency cable 6 and a frequency spectrograph 7.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
As shown in fig. 1, a 5G millimeter wave handset 1 is a device to be detected. Meanwhile, the microminiature closed cavity 2 which is transparent to millimeter waves and microwaves is filled with monoterpene gas 3, and volatile oil gas can be used, and the monoterpene gas can also be volatile oil gas, and comprises rose essential oil, sweet osmanthus essential oil, peppermint oil, clove oil and the like. In order to detect the millimeter wave power density of all the positions on the surface of the 5G millimeter wave mobile phone 1, the closed cavity 2 is mechanically moved along the scanning track 4. The length, direction, etc. of the scanning trajectory 4 depend on the specific device dimensions in order to allow all positions of the surface of the device to be measured to be detected and to minimize the scanning time.
Fig. 2 is a schematic structural diagram of a device for detecting millimeter wave power density on the surface of a millimeter wave device. The 5G millimeter wave mobile phone 1 is in a working state, the millimeter waves emitted during the working process excite monoterpene gas 3 (marked in fig. 1) in the micro-closed cavity 2, the excited monoterpene gas can radiate microwave signals, and the microwave signals are received by a horn antenna 5 aligned with the closed cavity 2 and transmitted to a frequency spectrograph 7 through a radio frequency cable 6. The working frequency band of the horn antenna covers the microwave fingerprint power spectrum frequency band radiated after the monoterpene gas is excited. The frequency meter 7 can detect the microwave fingerprint power spectrum intensity radiated by the monoterpene gas 3. The larger the millimeter wave power density is, the larger the degree of excitation of the monoterpene gas 3 is, and the larger the intensity of the microwave fingerprint power spectrum radiated by the monoterpene gas 3 is, so that the millimeter wave power density at the position of the closed cavity 2 and the intensity of the microwave fingerprint power spectrum detected by the frequency spectrograph 7 are in positive correlation. The relation between the two is calibrated in advance through an experimental method, and the millimeter wave power density of the current position of the closed cavity 2 can be deduced while the microwave fingerprint power spectrum is detected by the frequency spectrograph 7 by contrasting the calibrated relation.
The advantages of this embodiment include: different from the traditional method for detecting the near field by using a probe, the closed cavity 2 is transparent to millimeter waves and microwaves, and the original millimeter wave radiation intensity of the antenna inside the 5G millimeter wave mobile phone 1 is hardly influenced by the existence of the closed cavity 2, so that the intensity value detected by the method is closer to an actual value. In addition, in the method, the microwave fingerprint power spectrum is detected in real time, so the millimeter wave power density is also obtained in real time, and the traditional method needs to measure the size of an electric field and a magnetic field first and then calculate the power density, so the process is complex. In addition, the microwave signal is detected, and the cost of the microwave detection device is far lower than that of the millimeter wave detection device at present, so the embodiment has a cost advantage.
The embodiments in the above description can be further combined or replaced, and the embodiments are only described in the preferred embodiments of the present invention, and are not limited to the concept and scope of the present invention, and various changes and modifications made by the technical solutions of the present invention by those of ordinary skill in the art without departing from the design concept of the present invention all belong to the protection scope of the present invention. The scope of the invention is given by the appended claims and any equivalents thereof.
Claims (3)
1. The utility model provides a detect device of millimeter wave equipment surface millimeter wave power density which characterized in that: the device comprises a closed cavity, a horn antenna, a radio frequency cable and a frequency spectrograph; the closed cavity is arranged on the surface of the millimeter wave equipment to be detected or is at a certain distance away, millimeter wave induction substances are contained in the closed cavity, and the horn antenna is aligned to the closed cavity and is connected to the frequency spectrograph through a radio frequency cable.
2. The apparatus of claim 1, wherein: the closed cavity is a cube or a sphere, and the surface area of the closed cavity is less than one tenth of that of the millimeter wave equipment to be detected.
3. The apparatus of claim 1, wherein: the closed cavity or the millimeter wave equipment to be detected can perform relative displacement, so that the closed cavity scans the whole or partial surface of the millimeter wave equipment to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922478660.1U CN211979054U (en) | 2019-12-31 | 2019-12-31 | Device for detecting millimeter wave power density on surface of millimeter wave equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922478660.1U CN211979054U (en) | 2019-12-31 | 2019-12-31 | Device for detecting millimeter wave power density on surface of millimeter wave equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211979054U true CN211979054U (en) | 2020-11-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922478660.1U Active CN211979054U (en) | 2019-12-31 | 2019-12-31 | Device for detecting millimeter wave power density on surface of millimeter wave equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211979054U (en) |
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2019
- 2019-12-31 CN CN201922478660.1U patent/CN211979054U/en active Active
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