90' turn in pcb trace? is it harmfull

[umashankar.s]

Why 90 degree turn traces produce cross talk or noise in pcb?

[KINETIC_JOULES]

Umm. . . can you please clarify your question?

[reachrkata]

Yes it is harmful depending on what signal it carries. If it a DC signal no harm. If a HF signal, then the abrupt turn of the trace creates an antenna from which the HF signal radiates.

[umashankar.s]

Thanks..

Do you have any waveforms or simulation results if any to justify answer
or else if snapshots thats enough

[ash]

Originally Posted by KENETIC_JOULES

Umm. . . can you please clarify your question?

Traces are those copper (or other conductors) tracks you find on Printed Circuit Boards. umashankar's question was basically asking why the copper tracks at are 90^o (right angled) produces "cross talk" and "noise" in PCBs.

Do you have any waveforms or simulation results if any to justify answer or else if snapshots thats enough

I believe you can try finding those in IEEE journal papers
IEEE - the world's leading professional association for the advancement of technology

[just2rock]

Originally Posted by ash

I believe you can try finding those in IEEE journal papers
IEEE - the world's leading professional association for the advancement of technology

we in CE is here to support with technical knowhows we have and help query generators get his solutions here in CE only,not to bypass it to some journals,which in return shall prove our weakness Ash

[ash]

Originally Posted by just2rock

we in CE is here to support with technical knowhows we have and help query generators get his solutions here in CE only,not to bypass it to some journals,which in return shall prove our weakness Ash

Haha, I understand your point. However, the reason I gave the IEEE journals was because he requested for waveforms or simulation results regarding the effect of a 90 degree trace with HF signals. Those journals are not limited to industry professionals and PhD engineers; they are good resources even for students.

I personally dont have the software capable of simulating the effects on traces, but those who could would have posted their results in those journals

[ash]

If you havent searched yet, here's one of the journals you can refer to:
"Right angle corners on printed circuit board traces, time and frequency domain analysis"
Montrose, M.I.
IEEE Xplore - Login

However, you will not be able to access the full content without full subscription (not only just a IEEE membership, unfortunately). Good news is, you can find the document for free from the actual source:

http://www.montrosecompliance.com/Te...orners-USA.pdf

Hope that helps!

[KINETIC_JOULES]

Originally Posted by ash

Traces are those copper (or other conductors) tracks you find on Printed Circuit Boards. umashankar's question was basically asking why the copper tracks at are 90^o (right angled) produces "cross talk" and "noise" in PCBs.

Thanks! I'm still relatively new to all of this.