Here is top Answer of window.location in Amp(Accelerated Mobile Pages)
<button on="tap:AMP.navigateTo(url='http://google.com')">google.com</button>
<button on="tap:AMP.navigateTo(url='http://google.com', target='_top')">google.com (_top)</button>
<button on="tap:AMP.navigateTo(url='http://google.com', target='_blank')">google.com (_blank, noopener)</button>
<button on="tap:AMP.navigateTo(url='http://google.com', target='_blank', opener=true)">google.com (_blank, with opener)</button>