[RFI] Hyperlan interference

[Marco Spalluzzi]

Hi guys, I'm looking for a factory which produces filters (high pass or 
band pass) for the 5.4 GHz band assigned to Hyperlan wireless connections.
I've got a few access unit around the mountains here, but one of them 
started to receive some interferences a while ago.
We replaced cables and antennas, but nothing changed.
Probably it's an overload coming from some FM radio stations tx between 
88 and 108 MHz, or maybe a repeater-studio link of one or more of these 
stations.
Stubs are too difficult to build, even more to tune of course...
Thanks in advance.

Marco - IK2XSL