have a look at ebay item 291236768693
also at 191327060948 (this is the one I use)
do a minimum price bid on these, often there is no competition and if you lose the auction, there’ll be another tomorrow
you will need to arrange some sort of mounting pole to get the antenna above the top of your roof - your local TV aerial shop will be able to sell you a bracket or something (take a picture to show them)
The antenna will come with a connector on the bottom, the second says it’s got an N female, so it needs an N-Male on the end of a length of downlead … what length do you need?
The problem is, if it’s a long length you need a better quality cable - if it’s only maybe 5 yards / meters - RG6 will be OK to start with.
There are places on the net that will make you up a length of RG6 (or better) cable with an N-Male on the end. The other end of the cable will also need a plug - this will go into an ‘MCX Pigtail’ (look on ebay) to connect to the dongle - the actual typ of plug needs to match the pigtail. See what’s commonly available in your part of the world (I’d probably use an F-Connector or TV antenna plug)