A design of radio frequency （RF） module in ultra high frequency （UHF） orthogonal frequency division multi-plexing （OFDM） node for mobile multimedia sensor network was presented. It adopts direct frequency conversion and power back-off technologies

supports high speed multiplex data transmission in time division multiple access （TDMA） mobile network

and has the ability of high linearity

high sensitivity

wide dynamic range and high out-of-band suppres-sion. It can be applied to very important person （VIP） motorcade video wireless monitoring system

public security emergency command system

and battlefield surveillance system

etc.