An antenna comprises two elongate antenna segments (740, 740′, 862, 940, 970, 1208 / 1212, 1300, 1320, 1322 / 1324, 1360, 1360′, 1520, 1520′, 1520″, 1523, 1523′, 1620, 1720, 1820, 1920) which extend from first ends (742, 742′, 864, 942, 972, 1322e, 1362, 1362′, 1522, 1522′, 1522″, 1622, 1922) / (744, 744′, 868, 944, 974, 1324e, 1364, 1364′, 1524, 1524′, 1524″, 1624, 1924) connected to the
antenna coupling coil in opposite directions to second ends (744, 744′, 868, 944, 974, 1322c, 1366, 1366′, 1524, 1524′, 1524″, 1624, 1924) / (742, 742′, 864, 942, 972, 1324c, 1368, 1368′, 1522, 1522′, 1522″, 1622, 1922) at least partially around the inner surface of the tire. The antenna and
antenna coupling coil are mounted to the inner surface of the tire, and the
transponder module is attached to the
antenna coupling coil in a way which positions the
transponder coupling coil in close proximity and concentric to the antenna
coupling coil, thereby providing effective
transformer-type
coupling between the
transponder and the antenna.