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A compact microstrip-fed multiband planar antenna for global positioning system, worldwide interoperability for microwave access, and wireless local area network applications is presented. Three operating frequency bands are achieved by a pair of L-shaped slots and rectangular slots, and defected ground structure. The fabricated prototype for the proposed antenna occupies an area of 32 3 22.6 mm 2 . The measured results show that the proposed antenna has 10 dB impedance bandwidth of 420 MHz (1.34-1.76 GHz), 590 MHz (3.21-3.80 GHz), and 1.5 GHz (5.05-6.55 GHz). The proposed antenna shows good radiation patterns and acceptable gain over three operating bands.