urgent help needed in RF system hardware interview

HI,

I will have an interview recently. The position is RF SYSTEM HARDWARE ENGINEER( board level) The company is RIM, canada, which manufactures Blackberry.

I am a newer in RF filed. Can any prfoessional give me helps about how to prepare technical stuff in RF part? They are interested in WLAN in my background.( some people in RIM gave me the hints). What should i prepare for RF part?

Thank you very much.