Download ear from weblogic console

You cannot get EAR from console. You will need to access the host with your WLS instances (via SSH or FTP).
If you have uploaded your EAR through the console, you will find it at [DOMAIN_HOME] / servers / AdminServer / upload. If the deployment mode of the deployment is not staggered or external (see staging mode description and recommendations at http://docs.oracle.com/middleware/1213/wls/DEPGD/deploy.htm#DEPGD235= ) you can get the path EAR locations on the Application Overview tab (select Deployments in the Domain Structure Tree and select the application in the Deployments Summary section).