a) No antenna, only deco, pads for additional RGB LEDs b) more pads for RGB LEDs (in total there are 3 RGB LED areas, on the part that looks like an antenna, and in the lower left and right area of the board) c) On/Off-Switch d) Micro-USB for connecting to laptop e) Micro-USB for additional energy f) external clock out, an SMA connector (X201) could be soldered here (not for antennas!) g) clock generator h) on-board PCB antenna i) pads for SMA connector (X301) or external antenna. Any edge-launch SMA socket for 1.6mm PCB thickness should work. j) radio frequency part, for sophisticated applications you may want to cover this with a metallic shield to prevent irradiations

see Antennas

see LEDs

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