1. Home >
  2. Apps >
  3. Groups >

90' turn in pcb trace? is it harmfull

Question asked by umashankar.s in #Coffee Room on Jul 2, 2008
umashankar.s
umashankar.s 路 Jul 2, 2008
Rank D3 - MASTER
😕Why 90 degree turn traces produce cross talk or noise in pcb? Posted in: #Coffee Room
KINETIC_JOULES
KINETIC_JOULES 路 Jul 2, 2008
Rank C1 - EXPERT
Umm. . . can you please clarify your question?
reachrkata
reachrkata 路 Jul 2, 2008
Rank C2 - EXPERT
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
umashankar.s 路 Jul 2, 2008
Rank D3 - MASTER
Thanks..

Do you have any waveforms or simulation results if any to justify answer
or else if snapshots thats enough
Ashraf HZ
Ashraf HZ 路 Jul 3, 2008
Rank A2 - PRO
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[sup]o[/sup] (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 馃榾
IEEE - the world's leading professional association for the advancement of technology
just2rock
just2rock 路 Jul 3, 2008
Rank B3 - LEADER
ash
I believe you can try finding those in IEEE journal papers 馃榾
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:!:
Ashraf HZ
Ashraf HZ 路 Jul 3, 2008
Rank A2 - PRO
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 馃榾
Ashraf HZ
Ashraf HZ 路 Jul 3, 2008
Rank A2 - PRO
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:

https://www.montrosecompliance.com/Technical_papers/corners-USA.pdf

Hope that helps!
KINETIC_JOULES
KINETIC_JOULES 路 Jul 3, 2008
Rank C1 - EXPERT
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[sup]o[/sup] (right angled) produces "cross talk" and "noise" in PCBs.
Thanks! I'm still relatively new to all of this.

You must log-in or sign-up to reply to this post.

Click to Log-In or Sign-Up