Drawing microstrip line in Eagle

Community PCB Design
41

Yes, you name the polygons GND and you place vias down that are also named GND.

42

And do I connect anything to those vias or not?

43

Why? They will be connected to copper on the top and bottom of the board.

44

Is this good?

45

While the stitching around the edge looks OK, there are a few other issues with that layout:

  • The regulator footprint looks too long; usually the leads get bent just before they widen

  • The power traces are way too thin

  • Other traces seem to be too thick, to the point that they almost short out

  • Don’t run traces topside under the regulator - the tab is metal (ground on this regulator) and can short out

  • Add a hole for the regulator mounting screw.

  • The regulator bypass caps need to be right next to the regulator. The module bypass caps need to be right next to the module.

  • I would move the reset components (R1/C5) close to the module

  • RF modules tend to draw large current spikes. I’d add pads for some bulk capacitance on both the input and output of the regulator, just in case.

  • Some vias are too close to the module pads

  • Traces shouldn’t bend at right angles - two 45 degree bends in a row is better

  • You may want to add some mounting holes

/mike

46

Thanks for the reply man. Well I uploaded the regulator library here http://www.2shared.com/file/12916098/ea … 62-33.html just in case someone would take a look at it. For the other things I will try to do my best to correct them.