The microstrip patch antenna consists of any planar or non-planar conductive patch on one side of the dielectric substrate and the ground plane on the other side.

RFID tag antenna is a transponder antenna of RFID electronic tag, and it is a communication induction antenna.

Tag antennas are divided into three categories: coils, dipoles and slots (including microstrip patches).

The difference is that microstrip patch antenna is a kind of antenna, while tag antenna is an application of antenna. It works with antenna and chip, and the antenna part of tag antenna can also be realized in the form of patch.