meander line

Sep 09, 2016 1 Replies

Rate this thread:

John Larkin 9 years ago

Here's one more silly circuit that I included on a recent proto board.

formatting link

One-way delay is 430 ps, and I hit 50 ohms pretty close. I don't always manage that.

formatting link

There is no significant pre-shoot on the TDT thru signal, so the loops aren't coupling into one another. I guess a tighter pattern would have sideways shortcut coupling, and different (higher?) impedance.

John Larkin Highland Technology, Inc lunatic fringe electronics

Vote

bill.sloman 9 years ago

How thick is the dielectric under the line? IIRR if the spacing between the loops is appreciably bigger than the board is thick, you don't seem much loop to loop coupling.

A field-modelling program should be able to tell you pretty exactly what's likely to happen.

A purist might have bevelled the corners a bit. Without it you get a bit of extra capacitance at each bend.

Bill Sloman, Sydney

Vote

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required