Acta Metrologica Sinica  2024, Vol. 45 Issue (11): 1733-1737    DOI: 10.3969/j.issn.1000-1158.2024.11.19
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Research on THz Portable Cold Noise Standard Source
LUAN Peng1,LIU Chen1,DU Jing2,WANG Yibang1,HUO Ye1,WU Aihua1
1. The 13th Research Institute of China Electronics Technology Group Corporation, Shijiazhuang, Hebei 050051, China
2. Shijiazhuang Division of PLAA Infantry College, Shijiazhuang, Hebei 050083, China
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Abstract  The working principle, structural characteristics, performance verification, and uncertainty evaluation of the 170~260GHz portable cold noise standard source newly developed by the 13th Research Institute of China Electronics Technology Group Corporation is introduced. The device adopts a matched wedge load immersed in a rectangular waveguide cooled by liquid nitrogen, and transmits noise power directly to the output waveguide port at room temperature through the waveguide transmission line. By simulating the design and reliable installation of wedge loads, low reflection output of the noise source is achieved. A vacuum pumping scheme is adopted to make the noise source portable, and accurate calibration of the noise source is achieved based on precise temperature control.Through analysis and experiments, it is shown that the output standing wave ratio of the standard source is less than 1.2, the output noise temperature is less than 140K, the uncertainty of output noise temperature is less than 7K (k=2).
Key wordselectronic metrology      cold noise standard source      noise temperature      THz technology;wedge load      uncertainty     
Received: 24 November 2023      Published: 29 November 2024
PACS:  TB973  
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LUAN Peng
LIU Chen
DU Jing
WANG Yibang
HUO Ye
WU Aihua
Cite this article:   
LUAN Peng,LIU Chen,DU Jing, et al. Research on THz Portable Cold Noise Standard Source[J]. Acta Metrologica Sinica, 2024, 45(11): 1733-1737.
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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2024.11.19     OR     http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2024/V45/I11/1733
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