Jun 24, 2008 #1 T tshah Member level 5 Joined Dec 31, 2007 Messages 80 Helped 7 Reputation 14 Reaction score 2 Trophy points 1,288 Location USA Activity points 1,827 hi, can anybody explain me why 50 ohm impedance? I know it is for impedance matching and provides maximum power transfer. Is there a better way to explain why only 50 ohms? scientific formula or explanation? Thanks
hi, can anybody explain me why 50 ohm impedance? I know it is for impedance matching and provides maximum power transfer. Is there a better way to explain why only 50 ohms? scientific formula or explanation? Thanks
Jun 24, 2008 #2 Siniša Full Member level 6 Joined Jul 14, 2002 Messages 383 Helped 87 Reputation 174 Reaction score 18 Trophy points 1,298 Location Windsor ON Canada Activity points 2,692 It is not only 50Ω, it is just most common impedance used. 75Ω is used in broadcasting more often for example.
It is not only 50Ω, it is just most common impedance used. 75Ω is used in broadcasting more often for example.
Jun 24, 2008 #3 E echo47 Advanced Member level 6 Joined Apr 7, 2002 Messages 3,933 Helped 638 Reputation 1,274 Reaction score 90 Trophy points 1,328 Location USA Activity points 33,176 I've seen various web sites discussing that question. Here's one: **broken link removed**
Jun 24, 2008 #4 flatulent Advanced Member level 6 Joined Jul 19, 2002 Messages 4,624 Helped 489 Reputation 980 Reaction score 151 Trophy points 1,343 Location Middle Earth Activity points 46,689 Because of the log nature of the impedance with physical dimensions, it is difficult to make transmission lines of less than 30 or more than 90 ohms impedance.
Because of the log nature of the impedance with physical dimensions, it is difficult to make transmission lines of less than 30 or more than 90 ohms impedance.
Jun 24, 2008 #5 T tshah Member level 5 Joined Dec 31, 2007 Messages 80 Helped 7 Reputation 14 Reaction score 2 Trophy points 1,288 Location USA Activity points 1,827 hi echo47, i got the answer. this is a great explanation. Thanks
Jun 24, 2008 #6 balaguru thavamani Full Member level 5 Joined Nov 8, 2006 Messages 243 Helped 55 Reputation 110 Reaction score 22 Trophy points 1,298 Activity points 2,478 refer