The CC2550EM reference design contains schematics and layout files for the CC2550EM evaluation module used in the CC2500-CC2550DK development kit. The reference design demonstrates good techniques for CC2550 decoupling and RF layout. For optimum RF performance: these parts should be copied accurately. This is a 2-layer reference design with a discrete balun and SMA antenna connector designed for a single ended 50 ohm antenna.