Design concept of a novel balanced multi-band tag antenna for Internet of things sensors applications was proposed.The antenna has a symmetrical structure so that it can be easily and directly integrated with differential driving RF front ends.The antenna’s surface current distribution

radiation patterns

impedance matching characteristics and gain

were numerically studied by using computer simulations

and the operating principle of the antenna was determined.Based on the numerically and basic experimental results

it is concluded that the antenna has a compact size and moderate gain

and can cover the bands of 2.4～2.5GHz/5.1～12GHz

which are for RFID and short-range wireless access applications.Thus the antenna can be used as tag antenna for wireless sensors in Internet of things.