Experimental Study of AM and PM Noise in Cascaded Amplifiers
An experimental study of amplitude modulation (AM) and phase modulation (PM) noise spectra in cascaded amplifiers was carried out as a function of the number of amplification stages and the input power. Flicker and white noise contributions were determined, as well as effective noise figure (NF) fro...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/11/3/470 |
| _version_ | 1797488287698386944 |
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| author | Inari Badillo Joaquín Portilla |
| author_facet | Inari Badillo Joaquín Portilla |
| author_sort | Inari Badillo |
| collection | DOAJ |
| description | An experimental study of amplitude modulation (AM) and phase modulation (PM) noise spectra in cascaded amplifiers was carried out as a function of the number of amplification stages and the input power. Flicker and white noise contributions were determined, as well as effective noise figure (NF) from AM and PM noise spectra from small-signal to large-signal regimes. Simultaneous measurements of AM and PM noise were performed, and associated correlation was measured as a function of the offset frequency from the carrier. Measurements exhibited, in general, quite low AM–PM correlation levels both in the flicker and white noise parts of the spectrum. In some particular amplifier configurations, however, measurements showed some peaks in the correlation at some specific input power levels in the transition zone, from a quasi-linear to strong compression. The results show that the effective noise figure decreases with the number of stages for a given carrier output power level. |
| first_indexed | 2024-03-09T23:59:58Z |
| format | Article |
| id | doaj.art-06fd7ae6750a4563acd608a16e8f9315 |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-09T23:59:58Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-06fd7ae6750a4563acd608a16e8f93152023-11-23T16:17:26ZengMDPI AGElectronics2079-92922022-02-0111347010.3390/electronics11030470Experimental Study of AM and PM Noise in Cascaded AmplifiersInari Badillo0Joaquín Portilla1Department of Electricity and Electronics, University of the Basque Country UPV/EHU, 48940 Leioa, SpainDepartment of Electricity and Electronics, University of the Basque Country UPV/EHU, 48940 Leioa, SpainAn experimental study of amplitude modulation (AM) and phase modulation (PM) noise spectra in cascaded amplifiers was carried out as a function of the number of amplification stages and the input power. Flicker and white noise contributions were determined, as well as effective noise figure (NF) from AM and PM noise spectra from small-signal to large-signal regimes. Simultaneous measurements of AM and PM noise were performed, and associated correlation was measured as a function of the offset frequency from the carrier. Measurements exhibited, in general, quite low AM–PM correlation levels both in the flicker and white noise parts of the spectrum. In some particular amplifier configurations, however, measurements showed some peaks in the correlation at some specific input power levels in the transition zone, from a quasi-linear to strong compression. The results show that the effective noise figure decreases with the number of stages for a given carrier output power level.https://www.mdpi.com/2079-9292/11/3/470non-linear noisecascaded amplifiersAM noisePM noiseflicker noisewhite noise |
| spellingShingle | Inari Badillo Joaquín Portilla Experimental Study of AM and PM Noise in Cascaded Amplifiers Electronics non-linear noise cascaded amplifiers AM noise PM noise flicker noise white noise |
| title | Experimental Study of AM and PM Noise in Cascaded Amplifiers |
| title_full | Experimental Study of AM and PM Noise in Cascaded Amplifiers |
| title_fullStr | Experimental Study of AM and PM Noise in Cascaded Amplifiers |
| title_full_unstemmed | Experimental Study of AM and PM Noise in Cascaded Amplifiers |
| title_short | Experimental Study of AM and PM Noise in Cascaded Amplifiers |
| title_sort | experimental study of am and pm noise in cascaded amplifiers |
| topic | non-linear noise cascaded amplifiers AM noise PM noise flicker noise white noise |
| url | https://www.mdpi.com/2079-9292/11/3/470 |
| work_keys_str_mv | AT inaribadillo experimentalstudyofamandpmnoiseincascadedamplifiers AT joaquinportilla experimentalstudyofamandpmnoiseincascadedamplifiers |