missingname

Hello, hope my english isn't so bad. Ok, the wirless adapter ist great, works fine but i have a major problem. the cable length is to short. a normal bnc-cable extension dosn't work. in germany you can only buy male sockets with mother instead of threads as it's mounted on the valve PCIe-card. So i can't extend the cable. I onlye need 1,5 until 2 meters. Has anyone an idea? has anyone an extension in use and can tell me what i have to do?