Remote controls is normally either IR or RF.
IR usually operates in the 30-60 kHz range, typically 38 kHz and require free sight, send pulses of IR light to a receiver.
RF uses a much higher frequency, typically 300+ MHz and is used for various equipment that supports it like car locks, ports, home theaters (natively or using adapters) etc.
Your WiFi adapter most likely operates on the 2.4 GHz band, that is:
2.4000 to 2.4835 GHz - IEEE 802.11b,
optionally the 5 GHz band
5.15 to 5.35 GHz and
5.725 to 5.825 GHz - IEEE 802.11a.
Have no equipment to test on here but one have at least two alternatives.
1. The old iw tools.
iwlist List of available frequencies depending on locale.
iwconfig Set a specific frequency.
iw is the new and recommended tool to use with the official wiki at http://wireless.kernel.org/
aircrack-ng have some tools for various testing and proofing and auditing of your wireless network. As well as
wifijammer etc. Heed the laws/warnings etc. for your region – and use your head. For IR-jamming you are out of luck using your WiFI adapter.
Check out things like Radio spectrum, ISM band etc.
It is all bound to strict laws. The 2.4 GHz band is popular as it is free, as in you do not need license or the like to use it – unregulated frequencies. It is part of the ISM (Industrial, Scientific and Medical) where Radiocommunication services operating within these bands must accept harmful interference, which may be caused by these applications.
It also depends on regions etc. The International Telecommunication Union (ITU) would most likely also be an interesting topic.