Wifi Onboard

[umpire111]

Have a bog standard rooftop aerial from Wifi Onboard and it’s worked well. However I think a few bashes on the aerial have damaged it internally. Done all checks and with internal aerial in router only and am getting 21mbps but with external only 4 or 5, it clearly needs replacing. But, it cost about £150 for a replacement, can anyone recommend another type that can easily be screwed onto the existing base at a lesser cost?

[Sea Dog]

Are you sure it's not damp? Check the cable and base connection before you replace the expensive aerial - water ingress plays havoc with aerial runs. 

[umpire111]

Seems dry in the connection don’t know what else can do