Wireless Cable Signal?

Hi, I currently have 3 TVs and 1 cable modem all connected to a splitter in my basement. I would like to add two more cables connections but the cable company told me I would loose signal if I plugged more into the main cable... so I was wondering if I could have a wireless transmitter plugged into my main cable and have wireless receivers plugged into my tvs and modem so that the RF signal is wirelessly transfered throughout my home.... Is there a product out there that will do this?