How to keep AdBanner without new load at sereval pages?

I am creating an app with AdBanner. It is working fine (test mode). I included the banner at the bottom of each page. The issue is, that for each page, the ad is loading again. The ad is not shared between pages.

How can I create a widget that is persistent between pages? This way, even with a new page, the same ad will be displayed until the correct time to update the ad. Is it possible?

Thanks.