电邮这篇文章 Noise figure measurement
- 作者: Zaostrovnykh S.1, Guba V.1, Pivak A.1
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隶属关系:
- ООО «ПЛАНАР»
- 期: 编号 4 (235) (2024)
- 页面: 92-102
- 栏目: Test and measurement
- URL: https://journals.eco-vector.com/1992-4178/article/view/633161
- DOI: https://doi.org/10.22184/1992-4178.2024.235.4.92.102
- ID: 633161
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详细
An effective method for measuring noise figure is to use vector network analyzers equipped with the NF option. The article describes the equipment and methodology for measuring noise figure using vector network analyzers produced by PLANAR LLC with the NF option.
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作者简介
S. Zaostrovnykh
ООО «ПЛАНАР»
编辑信件的主要联系方式.
Email: vna@planarchel.ru
директор
俄罗斯联邦V. Guba
ООО «ПЛАНАР»
Email: vna@planarchel.ru
главный метролог
俄罗斯联邦A. Pivak
ООО «ПЛАНАР»
Email: vna@planarchel.ru
ведущий инженер по комплексным проектам, сертификации и метрологии
俄罗斯联邦参考
- Friis H.T. Noise Figures of Radio Receivers // Proceedings of the IRE, July, 1944.
- IRE (IEEE) standards on methods of measuring noise in linear twoports, 1959.
- Алмазов-Долженко К.И. Коэффициент шума и его измерение на СВЧ. М.: Научный мир, 2000.
- Белоусов А.П., Каменецкий Ю.А. Коэффициент шума. М.: Радио и связь, 1981.
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Fig. 1. Input noise power of a standard receiver in the 1 MHz bandwidth
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Fig. 2. Structural diagram of the MSHU
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Fig. 3. Receiver for noise power measurement
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Fig. 4. Schematic representation of noise signals reception: a - without preselection; b - with preselection
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Fig. 5. Signal-to-noise ratio at the input and output of the quadrupole
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Fig. 6. Graphical interpretation of input noise temperature
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Fig. 7. Example of power measurement at 2 GHz
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Fig. 8. Scheme of noise power measurement
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Fig. 9. Graphical representation of powers with the GS PH switched on, GS PC switched off and the added noise power Nadd (the dependence of noise power on temperature is determined by the steepness equal to kBG).
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Fig. 10. Schematic of receiver noise figure measurements
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Fig. 11. Graphical representation of receiver calibration
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Fig. 12. Schematic of noise figure measurements of cascaded device and receiver connection
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Fig. 13. Graphical representation of noise figure measurements
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Fig. 14. Schematic representation of device bandwidth limitation (degradation of GDUT estimation quality due to BSYS ≠ BREC at some measurement frequency)
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Fig. 15. Schematic representation of power in the main and mirror reception channels (mismatch effect compensation quality reduction)
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Fig. 16. Calibration wizard
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Fig. 17. Example of noise figure and gain measurements in the NF program
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