A ultra -thin high -gain reader antenna battle array for RFID system

The utility model relates to an ultra -thin high -gain reader antenna battle array for RFID system, its characterized in that: the antenna main part is the PCB board, the PCB board includes antenna system, substrate and attached to the substrate lower floor copper sheet paper tinsel as the antenna grounding board, antenna system includes interconnect's feed line part, ground plate and a plurality of microstrip patch antenna, the microstrip line that the feed line part is divided the ware and is connected with it including the merit, two inputs of formation are connected with microstrip patch antenna to the microstrip line, feed line circuit part contains two -stage merit branch structure at least, and the microstrip line that is connected with first order merit branch structure is the distribution of buckling, forms in the last one -level merit branch structure feed length that the microstrip line of two inputs is 90 vertical distribution and microstrip line distributes the phase difference that makes two inp