[SI-LIST] Re: Direction of displacement curent
- From: Mervin J <mervin.jacob@xxxxxxxxxxx>
- To: aaditya.kandibanda@xxxxxxxxx
- Date: Tue, 13 Mar 2012 10:51:24 +0530
As per Maxwell's equation, The direction of displacement current is
along the conduction current.
On 3/13/2012 6:54 AM, Long Yang wrote:
> In Maxwell's equations, there are two items about current, conduction
> current and displacement current.
> Conduction current is sometimes expressed related to electric field by
> conductivity.
> In the similar way, you can expect that displacement current has the
> similar relationship with electric field.
>
> Regarding PCB trace, the electric field inside copper trace is driven by
> driven voltage potential, so conduction current is along the copper wire.
> While the electric field of TEM mode is from signal trace to ground, and
> that implies the direction of displacement current.
>
> thanks
>
> On Mon, Mar 12, 2012 at 11:31, Antonis Orphanou<orphanou@xxxxxxxxxxxx>wrote:
>
>> On displacement current:
>> If you assume that for all the copper surfaces the tangential electric
>> field is zero and that there is only a normal E-field component (which
>> gives rise to the copper surface charge density) then you could visualize
>> the displacement current. It is the time derivative of the E-field in that
>> same direction.
>>
>>
>>
>> -----Original Message-----
>> From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
>> On Behalf Of Aaditya Kandibanda
>> Sent: Sunday, March 11, 2012 8:36 PM
>> To: si-list@xxxxxxxxxxxxx
>> Subject: [SI-LIST] Direction of displacement curent
>>
>> Hello everyone,
>> Can you please let me know what will be the direction of displacement
>> current on the traces of PCB, I am trying to understand it for analysis of
>> near and far end cross talk on PCB traces. the problem is, when there is a
>> equal distribution of capacitance along the length of 2 PCB traces? what
>> will be the direction of displacement current? If possible can some one
>> briefly let me know about the near end and far end cross talk? I am trying
>> to understand it, I see different authors express it in different views
>> which is confusing me as a novice.
>>
>>
>> Thanks and regards
>> Aaditya
>>
>>
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