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Coaxial standard low-temperature noise source

A noise source, coaxial technology, applied in the field of noise testing, to achieve high social value, high precision, and the effect of correcting errors

Inactive Publication Date: 2018-02-23
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of coaxial standard low-temperature noise source, to solve the traceability problem of noise signal below 10MHz

Method used

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  • Coaxial standard low-temperature noise source
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Embodiment Construction

[0022] In order to explain the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not be used to limit the protection scope of the present invention.

[0023] A coaxial standard low temperature noise source, such as figure 1 As shown, it includes a matching load 3, an insulated transmission line 2, a heat preservation container 1, a platinum resistance temperature sensor 9 and a temperature measurement component 7;

[0024] Wherein, the thermal insulation transmission line 2 passes through and is fixed on the side wall of the thermal insulation container 2 by a flange 4, the thermal insulation transmission line 2 is connected with a normal temperature joint 5 at one end outside the thermal...

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Abstract

The invention discloses a coaxial standard low-temperature noise source which comprises a matching load, a heat insulation transmission line, a heat preservation container, platinum resistor temperature sensors and a temperature measuring assembly, wherein the heat insulation transmission line penetrates through and is fixed on the side wall of the heat preservation container, a normal-temperatureconnector is connected to one end , outside the heat preservation container, of the heat insulation transmission line, one end of the heat insulation transmission line in the heat preservation container is connected with one end of the matched load, a matched load absorbing body is arranged in the other end of the matched load; at least two openings are formed in the two ends of the heat insulation transmission line; the platinum resistor temperature sensors are arranged in the openings and on the matched load absorbing body, the temperature measuring assembly is arranged outside the heat preservation container and is connected with the platinum resistor temperature sensor. The coaxial standard low-temperature noise source has the advantages of being convenient to use and high in precision, wide in the working frequency range and low in the output equivalent noise temperature.

Description

Technical field [0001] The invention relates to the technical field of noise testing. More specifically, it relates to a coaxial standard low temperature noise source. Background technique [0002] With the advancement of science and technology, devices and systems in the millimeter wave frequency band have become more widely used. For some low-noise devices and systems, the noise figure is the key performance index, and the noise source is an indispensable key instrument for measuring the noise figure. Common noise sources are divided into four types: (1) Saturated diode noise source: It is realized by using a diode whose cathode temperature is limited and working in the saturation region, but it can only work in the meter wave and decimeter wave band. (2) Solid-state noise source: The diode is reverse-biased to make it in an avalanche breakdown state, and the current fluctuations multiplied by the carrier avalanche are used to generate noise signals. It is currently the most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/18G01K13/00G01H17/00
CPCG01H17/00G01K7/18G01K13/006
Inventor 孙晓宁陈晋龙程春悦李芳谭帆陈玲邢晓芸
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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