Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Microwave subsystems applied for front-end of meteorological radar receiver

A receiver front-end and weather radar technology, which is applied in the field of microwave subsystems, can solve problems such as poor electromagnetic wave reflection ability and weaken radar anti-interference ability, and achieve the effect of improving anti-interference ability, measurement accuracy and signal quality, and reducing noise

Active Publication Date: 2007-05-23
INST OF PHYSICS - CHINESE ACAD OF SCI
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Meteorological radar requires the filter to have a very narrow passband, which cannot be achieved by conventional filters, so the conventional weather radar has to cancel the filtering link at the front end, which greatly weakens the anti-jamming ability of the radar
In addition, due to the poor ability of the atmosphere to reflect electromagnetic waves, weather radar requires radar to have high sensitivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Microwave subsystems applied for front-end of meteorological radar receiver
  • Microwave subsystems applied for front-end of meteorological radar receiver
  • Microwave subsystems applied for front-end of meteorological radar receiver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment 1 The microwave subsystem in the front end of the wind temperature profile radar receiver

[0052] The wind temperature profile radar is a system composed of a wind profile radar and an acoustic transmitter, and its structure is shown in Figure 1. The main part of the system - the wind profiler radar is essentially a pulse Doppler radar. This embodiment is used for the microwave subsystem in the front end of the radar receiver, and the microwave subsystem is placed between the receiving / transmitting switch and the mixer of the radar.

[0053] Microwave subsystem in the present embodiment, as shown in Figure 4, comprises low-noise amplifier 2, superconducting band-pass filter 1, cryogenic transmission cable and miniature refrigerator 3 (4 is the control panel of this miniature refrigerator); The superconducting band-pass filter 1 and the low-noise amplifier 2 described above are respectively placed in different shielding boxes, and the output end of the super...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention discloses a microwave subsystem for the front of the weather radar receiver, including low-noise amplifier, low-transmission lines, Superconducting band-pass filters, shielded boxes, micro-refrigerator and vacuum sealed envelope. The described superconducting band-pass filter and low noise amplifier is set in separate shielding boxes. Superconducting band-pass filter output is connected through coaxial microwave links to a low-noise amplifier input. A heat transfer plate is placed above the micro-refrigerator cold head. Superconducting band-pass filter and low-noise amplifier is placed in heat transfer plate. These devices are placed inside the vacuum sealed envelope. Superconducting band-pass filter input and low-noise amplifier output, through low-temperature cables, are connected to the coaxial microwave links connectors installed on the surface of the vacuum sealed envelope. This marked the reduction of the noise, and, because of the use of high-temperature superconducting narrow-band filter, meteorological radar's anti-jamming capability gets increase as 10, 000 times.

Description

technical field [0001] The invention belongs to the field of microwave engineering. Specifically, the invention relates to a microwave subsystem used for the front end of a weather radar receiver. technical background [0002] Weather radar is a family of radars used to detect the spatial location and status of meteorological objects. Its working principle is to intermittently transmit electromagnetic wave trains to meteorological targets in the air (such as atmospheric masses, clouds, precipitation particles, snow, ice crystals, etc.), and then receive the electromagnetic wave trains scattered back by the meteorological targets, and according to the characteristics of the echo signal To determine the spatial position, movement speed and other meteorological characteristics of the measured meteorological target. [0003] The main parameters measured by the weather radar are the distance r between the target and the radar, the azimuth and elevation angles of the target, the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/285G01S7/292G01S13/95
CPCY02A90/10
Inventor 何豫生李春光黎红张雪强何艾生张强孙亮黄建冬孟庆端李翡王跃辉张路
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com