Cannot get antenna polygon to fill

On 3/22/2010 1:21 PM, John Bachman wrote:

I followed the advice of couple of posters who suggested that a way to

do a pc copper antenna is to create a footprint package to provide the

schematic connections and then put a polygon around the footprint and

fill it with copper.

 

This antenna is a folded F that operates at 2.4 Ghz. Consequently it has

two connections, antenna and ground. I named the polygon ANTENNA which

is also the name of the net that connects to it. The other connection is

ground. Eagle sees these two connections as being an error since it is

just copper between them but that is what the design calls for.

 

As a consequence the antenna polygon will not fill. At least I think

that is why it will not fill. However, I did remove the ground

connection and it still will not fill.

 

Any ideas?

you have to use the RATSNEST command to fill the polygon. see Help

RATSNEST. if it still won't fill then it might overlap itself or be part

of the isolate setting.

i think you can name your pins ANT@1 and ANT@2 and they will be allowd

on the same net. then just connect one to the feed and one to ground in

schematic and you might fool it to get rid of DRC error. in the end if

the copper is like you want it the DRC doesn't matter, if you use v5 you

can "approve" the violation and it will stop reporting it.

On 3/22/2010 1:21 PM, John Bachman wrote:

I followed the advice of couple of posters who suggested that a way to

do a pc copper antenna is to create a footprint package to provide the

schematic connections and then put a polygon around the footprint and

fill it with copper.

 

This antenna is a folded F that operates at 2.4 Ghz. Consequently it has

two connections, antenna and ground. I named the polygon ANTENNA which

is also the name of the net that connects to it. The other connection is

ground. Eagle sees these two connections as being an error since it is

just copper between them but that is what the design calls for.

 

As a consequence the antenna polygon will not fill. At least I think

that is why it will not fill. However, I did remove the ground

connection and it still will not fill.

 

Any ideas?

you have to use the RATSNEST command to fill the polygon. see Help

RATSNEST. if it still won't fill then it might overlap itself or be part

of the isolate setting.

i think you can name your pins ANT@1 and ANT@2 and they will be allowd

on the same net. then just connect one to the feed and one to ground in

schematic and you might fool it to get rid of DRC error. in the end if

the copper is like you want it the DRC doesn't matter, if you use v5 you

can "approve" the violation and it will stop reporting it.