A chipless microwave identification tag (200) comprising: a dielectric substrate (210); and a plurality of antenna elements (220) made from a conductive material and disposed on at least one surface (205, 255) of the dielectric substrate (210); wherein when the tag (200) is excited by an incident microwave signal (131), a reflected wave (141) to identify the tag (200) is generated with a number of specific frequencies altered by microwave resonation of the antenna elements (220).Department of Industrial and Systems EngineeringUS8274368; US8274368 B2; US8274368B2; US8,274,368; US 8,274,368 B2; 8274368; Appl. No. 12/396,127Inventor name used in this publication: Kai Leung YungInventor name used in this publication: David Ki Wai ChengU
