The robot I have is 4 feet tall. The body is made of wood and it has a outer shell of aluminum flashing. The electronics including the XBee are in the center of the robot.
I was hoping to put a 1 foot antenna above the robot for better range and to reduce interference with an on board wireless netgear router.
I already have a pair of these XBee Pro 63mW Wire Antenna - Series 2B (ZigBee Mesh) - WRL-10421 - SparkFun Electronics so I would prefer not to have to buy a different kind.