CN210605035U - Millimeter wave real aperture radiometer system - Google Patents
Millimeter wave real aperture radiometer system Download PDFInfo
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- CN210605035U CN210605035U CN201921937761.4U CN201921937761U CN210605035U CN 210605035 U CN210605035 U CN 210605035U CN 201921937761 U CN201921937761 U CN 201921937761U CN 210605035 U CN210605035 U CN 210605035U
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Abstract
The utility model discloses a millimeter wave real aperture radiometer system, which comprises a high gain antenna, a low noise broadband amplifier, a high frequency broadband mixing receiving subsystem, a collecting and signal processing subsystem, a real-time control system, an image display system and a high precision two-dimensional turntable system which are connected in sequence; the low-noise broadband amplifier performs frequency conversion on the millimeter wave signals received from the high-gain antenna in a down-conversion mode; the high-frequency broadband frequency mixing receiving subsystem outputs a broadband intermediate-frequency signal to the acquisition and signal processing branch by adopting a heterodyne method; and the high-precision two-dimensional turntable system is connected with the high-gain antenna, so that the high-gain antenna receives radiation signals of different angles. By using the system, multi-angle test is realized, and radiation signals of different angles are received.
Description
Technical Field
The utility model relates to a meteorological detection equipment field especially relates to a real aperture radiometer system of millimeter wave.
Background
In the existing weather monitoring and early warning, a microwave radiometer is used for monitoring. The microwave radiometer is a high-sensitivity receiving device which judges a temperature curve by passively receiving microwave signals radiated by temperature and can quantitatively measure low-level microblog radiation of a target. The microwave radiometer is used as a passive microwave remote sensing instrument, obtains feature information of the ground object by receiving microwave radiation of the ground object, has the characteristics of all-weather observation capability and penetrating through a cloud layer and a rain area to a certain extent, and plays a particularly important role in the field of remote sensing. The microwave radiometer monitors continuous changes of atmosphere integral water vapor content and path liquid water content by measuring atmospheric microblog radiation signals in real time, and inverts and outputs atmospheric temperature and humidity contour lines and the like, so that short-time and near weather forecast can be realized. However, in the existing monitoring system, the structure is complex, the system sensitivity is low, and the monitoring and early warning capability is still to be improved due to the limitation of the monitoring angle.
Disclosure of Invention
The utility model aims at providing a millimeter wave real aperture radiometer system through using this system, realizes the multi-angle test, receives the radiation signal of different angles.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a millimeter wave real aperture radiometer system comprises a high-gain antenna, a low-noise broadband amplifier, a high-frequency broadband mixing receiving subsystem, an acquisition and signal processing subsystem, a real-time control system, an image display system and a high-precision two-dimensional turntable system which are sequentially connected; the system also comprises a power supply extension;
the low-noise broadband amplifier performs frequency conversion on the millimeter wave signals received from the high-gain antenna in a down-conversion mode; the high-frequency broadband frequency mixing receiving subsystem outputs a broadband intermediate-frequency signal to the acquisition and signal processing branch by adopting a heterodyne method; the acquisition and signal processing extension set processes the received broadband intermediate frequency signal and outputs a video output signal to the real-time control system; the real-time control system receives the video output signal and realizes imaging through the image display system; and the high-precision two-dimensional turntable system is connected with the high-gain antenna, so that the high-gain antenna receives radiation signals of different angles.
In the above technical solution, the high gain antenna is a cassegrain antenna.
In the above technical scheme, the high-precision two-dimensional turntable system comprises a high-precision two-dimensional turntable and a servo driving and controlling extension connected with the high-precision two-dimensional turntable.
In the technical scheme, the high-precision two-dimensional rotary table is provided with the high-frequency box, and the front end of the high-frequency box is provided with the Cassegrain antenna.
In the above technical scheme, the feed source of the cassegrain antenna and the reflecting surface are fixed and then communicated into the high-frequency box.
In the above technical solution, the low-noise broadband amplifier includes a first low-noise amplifier and a second low-noise amplifier.
In the above technical scheme, the power supply extension comprises a primary power supply extension and a secondary power supply extension.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the millimeter wave real aperture radiometer system of the utility model has simple structure, the high-precision two-dimensional turntable, the radio frequency and the high-gain antenna are integrated, and the use of cable connection and rotary joints is reduced; and the high-gain Cassegrain antenna is arranged, the gain is as high as 50dB, the intermediate frequency detection bandwidth of the high-frequency broadband mixing receiving subsystem is 11GHz, the system sensitivity is high, the resolution is high, and the radiation signal with weaker energy can be received.
2. The high-gain antenna is combined with the high-precision two-dimensional rotary table, so that the system can realize multi-angle testing and receive radiation signals at different angles.
Drawings
Fig. 1 is a schematic diagram of the millimeter wave real aperture radiometer system of the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
the first embodiment is as follows: referring to fig. 1, a millimeter wave real aperture radiometer system includes a high gain antenna, a low noise broadband amplifier, a high frequency broadband mixing receiving subsystem, a collecting and signal processing subsystem, a real-time control system, an image display system, and a high precision two-dimensional turntable system, which are connected in sequence; the system also comprises a power supply extension;
the low-noise broadband amplifier performs frequency conversion on the millimeter wave signals received from the high-gain antenna in a down-conversion mode; the high-frequency broadband frequency mixing receiving subsystem outputs a broadband intermediate-frequency signal to the acquisition and signal processing branch by adopting a heterodyne method; the acquisition and signal processing extension set processes the received broadband intermediate frequency signal and outputs a video output signal to the real-time control system; the real-time control system receives the video output signal and realizes imaging through the image display system; and the high-precision two-dimensional turntable system is connected with the high-gain antenna, so that the high-gain antenna receives radiation signals of different angles.
The millimeter wave real aperture radiometer system is simple in structure, the high-precision two-dimensional rotary table, the radio frequency and the high-gain antenna are integrated, and the use of cable connection and rotary joints is reduced; and a high-gain antenna is arranged, the gain is as high as 50dB, the intermediate frequency detection bandwidth of the high-frequency broadband mixing receiving subsystem is 11GHz, the system sensitivity is high, the resolution ratio is high, and the radiation signal with weak energy can be received.
In order to realize multi-angle test and receive radiation signals of different angles, the high-precision two-dimensional rotary table system comprises a high-precision two-dimensional rotary table and a servo driving and controlling extension set connected with the high-precision two-dimensional rotary table. The high-precision two-dimensional rotary table is provided with a high-frequency box, and the front end of the high-frequency box is provided with a Cassegrain antenna. And a feed source of the Cassegrain antenna is fixed with the reflecting surface and then communicated into the high-frequency box. The feed port is connected with the receiving front end, the receiving front end is connected with the outside through a cable assembly, and a transfer port is arranged at the rear part of the high-frequency box to ensure the sealing inside the high-frequency box.
The low-noise broadband amplifier comprises a 94GHz first low-noise amplifier and a 94GHz second low-noise amplifier.
The high-frequency broadband frequency mixing receiving subsystem comprises a 94GHz broadband frequency mixing receiving unit and a video amplifying and low-pass filtering unit. The output broadband intermediate frequency signal can be directly used for collecting and signal processing extension sets. The acquisition and signal processing branch is internally provided with a differential amplification module and an acquisition and preprocessing module.
The power supply extension set comprises a primary power supply extension set and a secondary power supply extension set.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (7)
1. A millimeter wave real aperture radiometer system, its characterized in that: the system comprises a high-gain antenna, a low-noise broadband amplifier, a high-frequency broadband mixing receiving subsystem, a collecting and signal processing subsystem, a real-time control system, an image display system and a high-precision two-dimensional turntable system which are sequentially connected; the system also comprises a power supply extension;
the low-noise broadband amplifier performs frequency conversion on the millimeter wave signals received from the high-gain antenna in a down-conversion mode; the high-frequency broadband frequency mixing receiving subsystem outputs a broadband intermediate-frequency signal to the acquisition and signal processing branch by adopting a heterodyne method; the acquisition and signal processing extension set processes the received broadband intermediate frequency signal and outputs a video output signal to the real-time control system; the real-time control system receives the video output signal and realizes imaging through the image display system; and the high-precision two-dimensional turntable system is connected with the high-gain antenna, so that the high-gain antenna receives radiation signals of different angles.
2. The millimeter wave real aperture radiometer system of claim 1, wherein: the high-gain antenna is a Cassegrain antenna.
3. The millimeter wave real aperture radiometer system of claim 2, wherein: the high-precision two-dimensional rotary table system comprises a high-precision two-dimensional rotary table and a servo driving and controlling extension set connected with the high-precision two-dimensional rotary table.
4. The millimeter wave real aperture radiometer system of claim 3, wherein: the high-precision two-dimensional rotary table is provided with a high-frequency box, and the front end of the high-frequency box is provided with the Cassegrain antenna.
5. The millimeter wave real aperture radiometer system of claim 4, wherein: and a feed source of the Cassegrain antenna is fixed with the reflecting surface and then communicated into the high-frequency box.
6. The millimeter wave real aperture radiometer system of claim 1, wherein: the low-noise broadband amplifier comprises a first low-noise amplifier and a second low-noise amplifier.
7. The millimeter wave real aperture radiometer system of claim 1, wherein: the power supply extension set comprises a primary power supply extension set and a secondary power supply extension set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921937761.4U CN210605035U (en) | 2019-11-11 | 2019-11-11 | Millimeter wave real aperture radiometer system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921937761.4U CN210605035U (en) | 2019-11-11 | 2019-11-11 | Millimeter wave real aperture radiometer system |
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| Publication Number | Publication Date |
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| CN210605035U true CN210605035U (en) | 2020-05-22 |
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| CN201921937761.4U Active CN210605035U (en) | 2019-11-11 | 2019-11-11 | Millimeter wave real aperture radiometer system |
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| CN (1) | CN210605035U (en) |
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2019
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