A coplanar waveguide- (CPW-) fed dual-band multiple-input multiple-output (MIMO) antenna for 2.45/5.5 GHz wireless local area network (WLAN) applications is presented in this paper. *e presented MIMO antenna consists of two identical trapezoidal radiating elements which are perpendicular to each other. *e size of the entire MIMO antenna is 50 × 50 ×1.59mm3, which is printed on a FR4 substrate. *e measured impedance bandwidth of the proposed antenna is 2.25–3.15 GHz and 4.89–5.95 GHz, which can cover IEEE 802.11 a/b/g frequency bands. A rectangular microstrip stub is introduced to achieve a good isolation which is less than −15 dB in both operation frequency bands.*emeasured peak gain is 5.59 dBi at 2.45 GHz and 5.63 dBi at 5.5 GHz.*e measured antenna efficiency is 77.8% and 80.4% in the lower and higher frequency bands, respectively. *e ECC values at the lower and higher frequencies are lower than 0.003 and 0.01, respectively.
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