This paper presents a compact microstrip antenna that is compatible to PCMCIA-compatible UHF RFID reader cards. The small form factor (Ol5.*O.1OX*O.002X) results in relatively narrow bandwidth (2% for VSWR<2) but reasonable directivity (2dBi) in the forward direction, which is of primary importance for maximnm read-range of backscatter RFID-readers Being a balanced antenna, the
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