Amplificateur electronique

Amplificateur electronique Source google image: https://www.researchgate.net/profile/Sebastien_Saez/publication/280894571/figure/fig16/AS:578050405875712@1514829364856/Schemas-de-lelectronique-de-mise-en-oeuvre-amplificateur-de-charge-a-ou-de-tension.png

Antenne gsm

Antenne gsm Source google image: https://ae01.alicdn.com/kf/HTB1Hw9aLXXXXXXCXFXXq6xXFXXXw/New-GSM-900-Booster-Antenne-GSM-900-mhz-65db-Gain-Mini-Size-Amplificador-GSM-900mhz-Repeater.jpg