Hi The microwave trick is fine for working out if it is a lossy material. Unfortunately what gets you in this case is more than just loss. A coax cable has core material that will (usually) do quite well in a microwave. None the less, the delay through the coax is different than through air ( = the coax has a velocity factor). Bob > On Feb 6, 2018, at 12:25 PM, Bo Hansen <timenuts@rudius.net> wrote: > > Hi > > Indeed a radome may distort the antenna pattern. In teh case of DIY projects the trick that most can apply is to take a piece of the radome material and put it into a microwave own. If it doesn't get hot it is OK for most DIY cases. > > Infinion have some nice GNSS MMICs e.g. BGA924N6 http://demo.21dianyuan.com/infineon/download/download_down/id/40/type/cn <http://demo.21dianyuan.com/infineon/download/download_down/id/40/type/cn> > > Bo