Mar 8, 2007 #1 P passerby Member level 3 Joined Jun 12, 2006 Messages 58 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,694 I'd like to use ferrite cores to put around the cable in order to reduce the current on the surface. The frequency range is around 800MHz ~ 2GHz. Could someone please advise the spec of ferrite cores ? Thanks for your kindly help.
I'd like to use ferrite cores to put around the cable in order to reduce the current on the surface. The frequency range is around 800MHz ~ 2GHz. Could someone please advise the spec of ferrite cores ? Thanks for your kindly help.
Mar 8, 2007 #2 E ender84567 Member level 4 Joined Jan 20, 2007 Messages 78 Helped 7 Reputation 14 Reaction score 0 Trophy points 1,286 Activity points 1,659 what exactly are you trying to do, current on the surface is skin effect and i dont belive ferrite cores affect this, though honestly i would be interested to sit down and work through the math to try and find their effect.
what exactly are you trying to do, current on the surface is skin effect and i dont belive ferrite cores affect this, though honestly i would be interested to sit down and work through the math to try and find their effect.
Mar 9, 2007 #3 P passerby Member level 3 Joined Jun 12, 2006 Messages 58 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,694 To measure the antenna you have to choke the feeding cable or the cable would be one part of your antenna and it is not correct. Can someone advise ferrite cores covered 800MHz ~ 2GHz ? Thanks.
To measure the antenna you have to choke the feeding cable or the cable would be one part of your antenna and it is not correct. Can someone advise ferrite cores covered 800MHz ~ 2GHz ? Thanks.
Mar 9, 2007 #4 B biff44 Advanced Member level 6 Joined Dec 24, 2004 Messages 5,046 Helped 1,376 Reputation 2,748 Reaction score 1,056 Trophy points 1,393 Location New England, USA Activity points 37,902 digkey part number 240-2131-ND. There are other types/sizes shown on the same catalog page. Clamp two of them on the outside of the cable around λ/4 apart. Maybe another one at the far end.
digkey part number 240-2131-ND. There are other types/sizes shown on the same catalog page. Clamp two of them on the outside of the cable around λ/4 apart. Maybe another one at the far end.