Microwave variable temperature noise source at normal temperature output port

A technology of output port and output noise, which is applied in the field of microwave variable temperature noise source, and can solve the problem that the noise figure parameter is difficult to measure accurately

Active Publication Date: 2016-10-05
10TH RES INST OF CETC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To solve the problem that the noise figure parameters of many microwave ultra-low noise amplifiers and similar products or systems are difficult to measure accurately

Method used

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  • Microwave variable temperature noise source at normal temperature output port
  • Microwave variable temperature noise source at normal temperature output port

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Embodiment Construction

[0018] refer to figure 1 , figure 2 . exist figure 1In the described embodiment of a microwave variable temperature noise source with a normal temperature output port for ultra-low microwave noise testing, the variable temperature noise source mainly includes a refrigerator 1 in a low-temperature Dewar 4 in a vacuum environment, connected to the refrigerator 1 The cooling head 2 on the main shaft radiates a microwave load 5 that generates thermal noise. The refrigerator 1 adopts a Stirling refrigerator. The microwave load 5 of the noise source, the microwave heat-insulated transmission line 6, and the microwave coaxial output port 8 are equipped with distributed temperature sensors 7 for monitoring the physical temperature of the microwave path. The machine 1 and the low-temperature Dewar 4 construct a low-temperature environment. The microwave load 5 is radially fixedly connected, and one end is connected to the microwave heat-insulated transmission line 6 of the normal...

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Abstract

The present invention proposes a microwave variable temperature noise source with a normal temperature output port, aiming to provide a microwave noise source with the physical temperature of the output port at normal temperature and the variable equivalent output noise temperature in the range of 50K to 200K, which can be used in a microwave noise source with a normal temperature input port Measurement of Ultra-Low Noise Figure of Microwave Ultra-Low Noise Amplifiers. The present invention is realized through the following technical solutions: the microwave load (5) of the noise source, the microwave heat-insulated transmission line (6), and the microwave coaxial output port (8) are installed with distributed temperature sensors (7) for monitoring the physical temperature of the microwave passage ), the cold head fixed on the main shaft of the refrigerator (1) and the temperature sensor arranged in a linear array on the microwave insulation transmission line (6) are sealed in the low-temperature Dewar (4), and the cold head in the low-temperature Dewar (4) The head (2) is connected to the monitoring control circuit (3) through a temperature monitoring control line, and the microwave heat-insulation transmission line (6) radially passes through the normal-temperature microwave coaxial output port (8) outside the vacuum chamber wall.

Description

technical field [0001] The invention relates to a microwave variable temperature noise source for measuring the noise figure of a microwave ultra-low noise amplifier in the electronic field, more specifically, the invention relates to a method for measuring the noise figure of a microwave ultra-low noise amplifier with ultra-low noise performance Parameters of microwave noise sources. It can be considered that the present invention can also be used for the amplitude linearity performance of microwave receivers such as the noise figure measurement of other similar microwave circuits with ultra-low noise performance and the microwave radiometer, except for the measurement of the noise figure of the microwave ultra-low noise amplifier. test. Background technique [0002] As we all know, noise is a natural phenomenon and a form of motion of matter. Noise is unavoidable in electronic equipment and systems. Generally speaking, noise is harmful, because the interference of noise ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/26
Inventor 黄凯冬黄坤超毛怡黄安君李玥明治中叶晓书杜晓明
Owner 10TH RES INST OF CETC
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