A high heat resistance microwave sub-system for weather radar receiver front end

Abstract

The invention relates to a microwave subsystem of high heat resistance which is used in the fore end of the weather radar receiver, it includes: superconductive filter, low noise amplifier with table structure, tiny band transmission line, sealed shell, refrigeration machine and temperature control instrument; Said superconductive filter includes high temperature superconductive shield box and superconductive piece which is in the high temperature superconductive shield box; the output end of the superconductive filter is electric connected with the low noise amplifier via tiny band transmission line, both are installed on the heat transferring plate, the bottom of the heat transferring plate is fixed to the cool head of the refrigeration machine. The advantages of the invention are realizing the flat integrating technique and making the assembly of the subsystem more reasonable, so the noise of the subsystem is decreased further; the heat resistance of the invention is high, the cool quantity wastage of the subsystem cool head is small, so under the equal refrigeration power, flat integrating technique can load more components. For example, the same refrigeration machine can load several superconductive components or other device.

Description

technical field [0001] The invention belongs to the field of microwave engineering, in particular, the invention relates to a high thermal resistance microwave subsystem used for the front end of a meteorological 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 elev...

AI Technical Summary

Problems solved by technology

Microwave communication receivers and some radars (such as weather radars) require filters to have a very narrow passband, which cannot be achieved by conventional filters, so the filtering link has to be canceled at the front end, and the consequence is that the radar is greatly weakened. anti-interference ability

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