Abstract: A RFID tag (500) includes an antenna (100) that includes a first dipole (110), a first feeder portion (130), a second dipole (120) and a second feeder portion (140). The first feeder portion is coupled to the first dipole at two locations a feeder length distance apart. The second feeder portion is coupled to the second dipole at two locations the feeder length distance apart. The feeder portions are also coupled to an antenna terminal (150). Impedance at the antenna terminal is determined, at least in part, by the feeder length distance. Each of two end portions of the first dipole distal from the first feeder portion is connected to a respective corresponding end portion of the second dipole distal from the second feeder portion, the first and second dipoles thereby forming a rectangle. The antenna is symmetrical about both a major and a minor axis of the rectangle.