Dual-channel simultaneous transmitting and receiving type Doppler polarization weather radar

A weather radar, transceiver technology, applied in the field of microwave remote sensing and telemetry, can solve problems such as performance is greatly affected by temperature, slow sampling speed, poor data accuracy, etc., to achieve the effect of superior performance

Inactive Publication Date: 2006-07-12
COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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AI Technical Summary

Problems solved by technology

The mode of using high-power microwave switches to alternately realize dual polarization conversion has many disadvantages: 1. The sampling speed is slow, and it takes twice as long to collect the same amount of data as compared to simultaneous transmission; 2. The data accuracy is poor, mainly because the microwave swi

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  • Dual-channel simultaneous transmitting and receiving type Doppler polarization weather radar
  • Dual-channel simultaneous transmitting and receiving type Doppler polarization weather radar
  • Dual-channel simultaneous transmitting and receiving type Doppler polarization weather radar

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Embodiment Construction

[0021] Attached below figure 1 , the present invention is described further:

[0022] A dual-channel simultaneous transceiver Doppler polarized weather radar, the 9370MHZ (equivalent to a wavelength of 3.2cm) high-power microwave signal sent by the transmitter 1 is divided into two paths by the work divider 2, and one path is sent to the level ( H road) transmission channel, the other is sent into the vertical (V road) channel through the high-power attenuator 4, and then sent to the antenna 7 through the azimuth twisted pair chain 5 and the elevation twisted pair chain 6, and then transmitted through the duplexer 8 and the horn 9 Go out; the horizontal and vertical polarization signal components of the target backscatter echo signal received by the antenna 7 respectively pass through the horn 9, duplexer 8, pitch twisted pair 6 and azimuth double hinge 5, and pass through the T / R transceiver switch , are respectively sent to the horizontal (H) and vertical (V) receiving chan...

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Abstract

The invention relates to a electronic instrument to detect cloud and precipitation particle in microwave remote sensing and measuring field. Wherein, dividing the large-power microwave signal from a transmitter into two paths to send with azimuth twisted-pair bale and pitch twisted-pair cable to antenna with one path through the phase shifter and another path through the large-power attenuator and emit out with a duplexer and horn; then, driving the horizontal and vertical polarization echo signal formed by back scattering of the target into horizontal and vertical receive channels to mix with preamplifier and mixer into MF signal and send to digital MF receiver and convert into digital signal; finally, sending the signal into signal processor connected to high-speed LAN to transmit information to user. This invention fills up the filed domestic blank and provides a new device for radar weather enterprise and disaster prevention and reduction.

Description

technical field [0001] The invention belongs to the technical field of microwave remote sensing and telemetry, and is an electronic instrument used for cloud and precipitation particle detection. Background technique [0002] The weather radar uses clouds and precipitation as the observation objects. It emits electromagnetic waves to the target, receives its backscattered echo, and then studies the characteristics of the target according to the change of the echo. According to the scattering theory, the ratio of the backscattered echo to the transmitted wave of the target has both amplitude and phase information changes, and these changes reflect the differences of the target. Moreover, this change is different for polarized waves in different states. Conventional weather radars and Doppler weather radars generally emit only one state of polarized waves. Conventional weather radar can only obtain the intensity information of clouds and precipitation (Zh), and it can only o...

Claims

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Application Information

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IPC IPC(8): G01S13/95
CPCY02A90/10
Inventor 王致君楚荣忠
Owner COLD & ARID REGIONS ENVIRONMENTAL & ENG RES INST CHINESE
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